[ccp4bb] SSRL ; Can not access

2013-11-26 Thread Daniel
Hi folks, I can not access to SSRL from yesterday. smbnxs1.slac.stanford.edu. or smbnxs2.slac.stanford.edu I wonder something is wrong in the server. Please let me know what happened to the SSRL if you know that. Thanks to all. Daniel

[ccp4bb] Fully funded BBSRC PhD opportunity at the University of Liverpool

2019-12-19 Thread Daniel Rigden
experimental methods through time spent in the lab of Owen Davies in Newcastle, this is a chance to work at the cutting edge of applied bioinformatics. thanks Daniel -- Prof Daniel Rigden Institute of Integrative Biology Room 101, Biosciences Building University of Liverpool Crown St., Liverpool, L69

[ccp4bb] EU granted phD thesis including a project on membrane contact site and cryo-ET//deadline January 21th/Institut Curie

2020-01-06 Thread Levy Daniel
ebsite is January 21th 2020. do not hesitate to circulate this announcement to potential candidates. Best wishes PS: do not contact me but register on the website Daniel Levy Team Molecular Microscopy of Membrane UMR 168 Institut curie, France https://science.institut-curie.org/team-levy phone 33

Re: [ccp4bb] Expi 293 (Met-) expression medium for selenomethionine labeling

2020-03-10 Thread Bonsor, Daniel
scale protein production section at the end. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2242577/ Good luck with your search and finishing your PhD. Best, Dan Daniel A Bonsor PhD. Lu Lab Institute of Human Virology University of Maryland, Baltimore 725 W Lombard Street N370 Baltimore Maryland

[ccp4bb] mmView - a tool for mmCIF exploration

2011-12-08 Thread Daniel Svozil
from http://sourceforge.net/projects/mmview) that can be installed on the user’s computer. Petr Cech and Daniel Svozil -- Daniel Svozil, PhD Head of Laboratory of Informatics and Chemistry Institute of Chemical Technology Czech Republic phone: +420 220 444 391 http://ich.vscht.cz/~svozil

[ccp4bb] International Ph.D. and Postdoctoral Programmes at CNIO, Madrid, Spain

2011-12-22 Thread Daniel Lietha
http://www.cnio.es/ing/cursos/programadoctorado.asp or contact our Training Office at p...@cnio.es. Please, feel free to distribute this message on your local institute network and thank you very much in advance for advertising our programmes in your institution. Best regards, Daniel Lietha

Re: [ccp4bb] molrep question - how get our ducks in a row?

2012-02-24 Thread Daniel Schlieper
Hello Gloria, I usually let Coot display the nearest symmetry molecules (as CA) and save those that fit: Option "Save Symmetry Coordinates..." and pick the molecule to save. Best regards, Daniel -- Daniel Schlieper email: daniel.schlie...@tuxomania.net Bi

Re: [ccp4bb] nmr blog

2012-03-23 Thread Daniel Picot
You can find here several links concerning NMR http://www.drorlist.com/nmr.html with a discussion list: https://listes.sc.univ-paris-diderot.fr/sympa/info/nmr Daniel Le 22/03/2012 19:35, Luthra,Amit a écrit : Is any NMR blog available for discussion? Amit Luthra, Ph.D. Post-Doctoral

Re: [ccp4bb] DDM

2012-03-27 Thread Daniel Picot
concentration of detergent during the early steps since the lipid/detergent mixed micelles will be less denaturing than the pure detergent micelles in the later steps. Thin layer chromatography is a quick and easy method to check if you have a large amount of lipids in your preparation. HTH Daniel

[ccp4bb] Postdoctoral fellowship for young scientists trained in the UK

2012-04-18 Thread Daniel Lietha
/programapostdoctorado-banco-santander.asp Online application form: https://www.cnio.es/ing/cursos/programapostdoctorado-form-uk.asp Please, feel free to distribute this message on your local institute network. Best regards, Daniel Lietha Cell Signalling and Adhesion Group Structural Biology and

[ccp4bb] 1 postdoctoral position available @cnio

2012-05-20 Thread Daniel Lietha
Dear All, I would like to inform you that an opening for a postdoctoral position is available in the Structural Bases of Genome Integrity Group at the Spanish National Cancer Research Centre in Madrid (CNIO, Madrid) We seek for candidates with a PhD in structural biology, biochemistry or a relate

Re: [ccp4bb] Removing a tight binding ligand

2010-10-07 Thread Daniel Bonsor
"It refolds properly according to the CD spectra but it some how manages to hold on to trace amounts of ligand despite serial dialysis (500ml to 5ml of sample) in 8M, 6M, 4M, 2M 1M urea followed by 50mM Tris. I also have a homolog that abjectly refuses to refold in either urea or guanidine, thou

Re: [ccp4bb] embarrassingly simple MAD phasing question

2010-10-13 Thread Daniel Anderson
The Fa" vector is always a 90 degree left turn from the Fa vector. For a centrosymmetric heavy atom substructure such as 1 mercury site in P21, the Fa" vector would point straight up or down. hope that helps, Citizen Dan William Scott wrote: Hi Citizens: Try not to laugh. I have an embar

[ccp4bb] Reindexing scaled data

2010-10-17 Thread Daniel Bonsor
Hi all, This maybe a simple/stupid question. I collected data at the synchrotron, integrated and scaled the data in P222 using HKL2000, though I should of scaled the data as P212121. When I try to reindex using Reindex I get a message of You are changing the symmetry of merged data are

Re: [ccp4bb] Cys auxotroph

2010-10-18 Thread Daniel Bonsor
Have you looked at the Keio collection. Though they are not compatible with T7 promoters, you can use the λDE3 Lysogenization Kit to add the T7 polymerase. A possible source is from Yale http://cgsc.biology.yale.edu/Auxotrophs.php though of course there are others. Dan

Re: [ccp4bb] Additional band on gel due to his-tag: any references?

2010-10-28 Thread Daniel Bonsor
THERMATOGA MARITIMA IscU IS A STRUCTURED IRON-SULFUR CLUSTER ASSEMBLY PROTEIN June 14, 2002 The Journal of Biological Chemistry, 277, 21397-21404. His-tagged Iron cluster that runs as a doublet. Mass-spec show they are the same species. They concluded "that the protein binds SDS in two stoichio

Re: [ccp4bb] Glutathione sepharose

2010-11-02 Thread Daniel Bonsor
I am using the glutathione sepharose 4B beads from GE. I had noticed that the capture efficiency does decrease with usage, though I have successfully regenerated the beads at least 20 times and I am still using them. I regenerate using 2CV of 6M guanidine after each run and every 5 runs with 70

Re: [ccp4bb] Trouble running dm

2010-11-12 Thread Daniel Anderson
AVER DOMAIN 1 should be followed by ROTA MATRIX and TRAN. What does "NCS 2 1" do? Is that in the documentation? I never saw that before, and I don't see it now in blah/ccp4-6.1.3/doc/dm.doc . If you intend to refine the NCS matrices, the instructions for that should be on the same line with "AV

[ccp4bb] Off Topic - Nickel Column

2010-11-17 Thread Daniel Bonsor
I have a His-tagged protein which I am coexpressing with it's binding partner to prevent proteolysis. Once on the Nickel column I can remove 80% of the partner by flushing 2l of 1.3M NaCl solution buffered at pH 8.5 overnight. However the last 20% is difficult to remove, even if I reload the Nic

Re: [ccp4bb] relationship between B factors and Koff

2010-11-19 Thread Daniel Anderson
Maybe you should look at: "Rotation barriers in crystals from atomic displacement parameters" Emily Maverick and Jack Dunitz (1987) Vol 62(2), 451-459. They reported that the libration amplitude of one part of a crystalline small molecule relative to another part is strongly correlated to bond

Re: [ccp4bb] relationship between B factors and Koff

2010-11-19 Thread Daniel Anderson
The journal was Molecular Physics (1987) Vol 62(2), 451-459. (my brain librates when I type) Daniel Anderson wrote: Maybe you should look at: "Rotation barriers in crystals from atomic displacement parameters" Emily Maverick and Jack Dunitz (1987) Vol 62(2), 451-459. They reporte

Re: [ccp4bb] Off Topic - Nickel Column

2010-11-19 Thread Daniel Bonsor
I wish to thank everyone. I did try shifting to a higher pH and flushing 3l of salt solution over the column which did not work. I tried 20ml 2M Urea on the column and a stepwise shift to no urea that showed removal of the protein. I will try binding studies to see if I did not denature the His

Re: [ccp4bb] protein interaction

2010-11-24 Thread Daniel Bonsor
Producing the proteins in cell free system or bacterial expression can affect the removal of the start methionine. Although the same rules of a small amino acids next to the start methionine apply, different methionine aminopeptidases tolerate certain small ones better. Depending on the which ce

Re: [ccp4bb] hydrohyapatite column

2010-11-30 Thread Daniel Picot
Hydroxyapatite can be miraculous, but is often very capricious: among others, it is temperature sensitive and two different corners of a somewhat inhomogeneous cold room may provide different results. Daniel Le 29/11/2010 16:08, Sebastiano Pasqualato a écrit : Hi all, I read/heard that

[ccp4bb] pH dependent conformational change

2010-12-06 Thread Daniel Jin
to any references that show a different pH sensing mechanism (other than His)? Thanks.   Best, Daniel

Re: [ccp4bb] pH dependent conformational change

2010-12-07 Thread Daniel Bonsor
I would like to point out that HSQC could still be applied even in such a large protein. TROSY-HSQC has been successful in improving peaks in spectra of large protein. Typically the sample would need to be deuterated to see the full effect of TROSY, but even a partial deuteration can improve sig

[ccp4bb] International PhD and Postdoctoral Programmes at CNIO, Madrid

2010-12-15 Thread Daniel Lietha
On behalf of Mar Pérez (Head of CNIO Training Office) Dear colleague, We would like to draw your attention to the calls for the International Ph.D. and Postdoctoral Programmes at the Spanish National Cancer Research Centre (CNIO) in Madrid. We would greatly appreciate if you could forward the

[ccp4bb] Interdisciplinary Postdoc position available et EMBL

2011-01-27 Thread Panne Daniel
work, and is equipped with a state of the art facilities. The Grenoble laboratory is located on an international research campus providing one of the best environments for structural biology in Europe. Further details are available here: http://www.embl.de/training/postdocs/eipod/index.html -- D

Re: [ccp4bb] N-terminal sequencing

2011-02-08 Thread Daniel Bonsor
We have used Alphalyse (http://www.alphalyse.com/picknpost.html). Dan

Re: [ccp4bb] MALLS analysis question

2011-02-18 Thread Daniel Anderson
In the Wyatt light scatter training class, they told us to set the alignment parameters ONLY with a monodisperse peak, such as the monomer peak from "monomeric BSA", formerly Sigma Chemical A-1900. The BSA alignment parameters are then manually typed as inputs for the scientifically interesting

Re: [ccp4bb] E. coli mutant strains

2011-02-26 Thread Daniel Bonsor
If you want a ClpP minus strain you can get it from the Keio strains. http://cgsc.biology.yale.edu/index.php http://www.shigen.nig.ac.jp/ecoli/strain/top/top.jsp For expression with the T7 promotor, you will need to use the λDE3 Lysogenization Kit or use a Arabinose induction plasmid instead.

Re: [ccp4bb] E. coli mutant strains

2011-02-26 Thread Daniel Bonsor
Factor Xa will work depending on the exact sequence. If your sequence starts MRS... and the start methionine is important and not removed then yes it will work when you clone it into a Factor Xa site. If however the start sequence starts RS... and the start methionine is actually removed, when y

[ccp4bb] International PhD Programme at CNIO, Madrid

2011-03-01 Thread Daniel Lietha
/cursos/descargas/doctorado/Poster_PhD_2011.pdf For further information, please contact our Training Manager, Mar Pérez at p...@cnio.es. Thank you, Daniel Lietha Cell Signalling and Adhesion Group Structural Biology and Biocomputing Programme Spanish National Cancer Research Centre (CNIO) C

Re: [ccp4bb] off topic: GPCR membane insertion/orientation

2011-03-04 Thread Daniel Picot
PMID: 20508091. with the cited literature Daniel Le 04/03/2011 17:31, Justin Hall a écrit : Dear Community, In trying to trouble shoot an experiment I have become interested in the cellular process that regulates the insertion and proper orientation of membrane proteins. I am looking for

Re: [ccp4bb] Supplementary density

2011-03-09 Thread Daniel Bonsor
If the protein is His-tagged, load the purified protein on to a Nickel column and place the column in a water bath above the protein's melting temperature. Recycle 5mls of water through the column to collect the peptide and then dry freeze or speed vac the sample to concentrate the peptide. I

[ccp4bb] PISA server

2011-03-26 Thread Daniel Bonsor
Is the PISA server having problems? I can not seem to upload any structure. Thanks Dan

Re: [ccp4bb] PISA server

2011-03-26 Thread Daniel Bonsor
It has eventually loaded but has taken nearly 20minutes.

Re: [ccp4bb] PISA server

2011-03-28 Thread Daniel Bonsor
Thanks for all the replies. Like I said, it eventually did upload the structure after 20 minutes and I had no problems in analyzing the interface. I did try two different computers, my home computer on Friday night and the lab one on Saturday afternoon. At home it failed to load the structure, b

Re: [ccp4bb] mutation and minimization

2011-05-12 Thread Daniel Fernandez
Or try SCWRL from Dunbrack's lab... --- On Thu, 5/12/11, gauri misra wrote: From: gauri misra Subject: Re: [ccp4bb] mutation and minimization To: CCP4BB@JISCMAIL.AC.UK Date: Thursday, May 12, 2011, 12:52 PM You can try Swiss-PDB viewer.. 2011/5/12 Thomas Holder Hi Andreas, I would like

[ccp4bb] Position available at Syngenta

2011-05-25 Thread Daniel Kloer
ply online. Informal enquiries can be made to Daniel Kloer (daniel.kl...@syngenta.com).

[ccp4bb] Protein scientist position at Syngenta

2011-06-28 Thread Daniel Kloer
Protein Scientist £28,000 - £35,000 + benefits Jealott’s Hill, Bracknell, Berkshire As an independent worker, you will be a part of our Protein Production Team, providing protein expression/purification support in a timely manner across a range of Crop Protection Research projects. This will invol

[ccp4bb] Three Postdoc positions available- EMBL

2011-08-01 Thread Panne Daniel
). EMBL is seeking to recruit postdoctoral researchers to join the group of Daniel Panne at EMBL Grenoble. The Panne group studies molecular mechanisms of epigenetic gene regulation and signaling in the innate immune system. We are seeking to recruit outstanding candidates with a strong interest in

Re: [ccp4bb] Sequence Alignment Question

2011-08-19 Thread Daniel Ryan
Jalview is another option. http://www.jalview.org/ Sent from my HTC - Reply message - From: "Yuri" Date: Fri, Aug 19, 2011 00:31 Subject: [ccp4bb] Sequence Alignment Question To: UID 23435 BODY[1]<0> {238} Hello Everyone, A little off topic but, what is a good way to show (publicatio

[ccp4bb] announcement EMBO Practical Course : Scientific Programming and Data Visualisation for Structural Biology

2009-12-14 Thread Panne Daniel
ined in terms of its depth. However, I think maintaining a focus on the fundamentals [...] will provide a useful foundation for those who want to apply the skills on their own." "Gaël McGill gave a brilliant [molecular animation] presentation and tutorial". Please feel free to e-m

Re: [ccp4bb] DSSP server

2010-01-15 Thread Daniel Schlieper
Hi Jane, the Whatif server lists the secondary structure according to DSSP. http://swift.cmbi.ru.nl/servers/html/index.html -> Protein analysis -> Secondary Structure, symmetry and accessibility Best regards, Daniel -- Daniel Schlieper email: daniel.schlie...@tuxoman

[ccp4bb] Postdoctoral position in Structural Biology at the CNIO, Madrid, Spain

2010-02-01 Thread Daniel Lietha
Europe’s cultural capitals Applications with CV and inquiries should be sent by email to the group leader, Dr. Daniel Lietha (dlie...@cnio.es). All enquiries and applications will be treated confidentially.

Re: [ccp4bb] Protein crystallizes while concentration

2010-02-18 Thread Daniel Ryan
A cheaper solution than buying the dialysis buttons would be just to make your own out of the top of a microtube. Depending on what volume you want to dialyse you can use either a PCR tube (~35 uL per lid) or larger 1.5 mL tube (~250 uL). Just cut the top off the tube using a hot scalpel, you th

[ccp4bb] Full B Factor

2010-03-24 Thread Daniel Bonsor
How do I convert the B-factors from my final structure to full B factors if I did not use TLS refinement? I have been refining isotropic B-factors. Do I switch to overall B-factor refinement, do something else, or have I missed the point altogether? It may be a dumb question but best to be saf

[ccp4bb] TLS, NCS and refinement

2010-03-28 Thread Daniel Bonsor
Hello again... I have a 2.7A resolution data set. Spacegroup P212121 as suggested by Pointless and best space group when run through Phaser. Unit cell is 110.02x160.49x186.55. Mathew's suggest 11 complexes in ASU. Both Molrep and Phaser can only find 6. This seems to be a typical observation wi

[ccp4bb] Postdoctoral position at the University of Liverpool

2010-04-01 Thread Daniel Rigden
analyse the success of MR using PHASER or other software. You will participate in manuscript preparation. Full details and instructions on how to apply are here http://www.liv.ac.uk/working/job_vacancies/research/R-572008.htm Informal enquiries may be made to me. -- Dr Daniel John Rigden

[ccp4bb] Follow up to TLS, NCS and refinement

2010-04-08 Thread Daniel Bonsor
Hello again! Following my previous question, there was something wrong with the staring model for molecular replacement. Now that is sorted, I have 8 complexes in the ASU. After a few rounds of refinement with NCS and isotropic Bfactors, both the Rfactor and Rfree get stuck at 30% and 36%, resp

Re: [ccp4bb] X-Ray films

2010-04-15 Thread Daniel Anderson
(What is in the Hollywood district other than tourists looking for "Hollywood"?) I have a silly anecdote that does not answer Harry's question: It must have been 1995 or 1996, the Beckman sales representative appeared at my desk on a Friday afternoon without an appointment, but carrying a bri

[ccp4bb] Rsym problems...maybe???

2010-04-22 Thread Daniel Bonsor
Hello again. At first I was not worry but maybe now I am. I have completed a structure and submitted to the PDB. They queried my Rsym value in the highest resolution bin, 2.5-2.37A (may I dare say it 100%). I was not worried at the time as I had: 99.4% completeness Mean(I/sdI) of 2.5 and a redu

[ccp4bb] Postdoc position EMBL

2010-06-23 Thread Panne Daniel
biophysical instrumentation is provided. To apply please send your CV, a statement of research interests, and names (including email address) of at least two referees by email to Dr. Daniel Panne (pa...@embl.fr). For more information: http://www.embl.fr/research/unit/panne/index.html

Re: [ccp4bb] metal-chelating affinity chromatography and FosCholine detergents

2010-07-13 Thread Daniel Picot
and integriry of the protein. HTH Daniel Le 13/07/2010 00:59, Pascal Egea a écrit : Dear All, I apologize for the not strictly crystallography-related query. I am currently purifying several membrane proteins solubilized in fos-cholines detergents and I consistently observe a significant loss of

[ccp4bb] Zalman ZM-M215W and ZM-M240W with coot and pymol

2010-07-13 Thread Daniel Lietha
Does anyone know if the ZM-M215W and ZM-M240W Zalman monitors work in 3D with Coot and Pymol (would use them on Mac OS10.6)? If so, does the increased resolution improve things compared to the ZM-M220W? Thanks, Daniel

Re: [ccp4bb] Problem with splitting nucleotides into multiple TLS groups in REFMAC

2010-07-15 Thread Daniel Anderson
Refinement with rigid-base TLS parameterization has been previously explored: Holbrook, Dickerson, Kim (1985) Acta Cryst B41, 255-262. (the photocopy is located in the pile of dust that I maintain adjacent to my desk) Ethan Merritt wrote: On Thursday 15 July 2010, Huw Jenkins wrote: Hi,

[ccp4bb] Crystallizing a membrane associated protein

2010-08-01 Thread Daniel Bonsor
and treat it as a soluble protein? Or something else? Thanks in advance for all of your suggestions. Daniel Bonsor

Re: [ccp4bb] Crystallizing a membrane associated protein

2010-08-01 Thread Daniel Bonsor
It behaves very well. No precipitation/cloudiness during purification. Secondary structure estimation by CD is ~50% alpha helical, 25% beta-sheet and 25% random coiled. I screened at 2, 4, 6 and 8mg/ml (8mg/ml around about 60:40% precipitation). If any other information is needed, just ask. Th

Re: [ccp4bb] Crystallizing a membrane associated protein

2010-08-01 Thread Daniel Bonsor
By size exclusion, it eluted where a 30kDa protein would be expected to elute. As for functional assay, I am currently trying to express its binding partner, though it shows a lot of degradation. But when I mix both proteins and run by size exclusion it causes the peaks of its binding partner to

Re: [ccp4bb] Fwd: [ccp4bb] XSCALE

2010-08-05 Thread Daniel Picot
Another very nice script to run and collect statistics from XDS is xdsme from Pierre Legrand http://code.google.com/p/xdsme/ Daniel Le 05/08/2010 16:55, Jovine Luca a écrit : WRT the redundancy, I am afraid you have to recompute an approximate value yourself using the number of

[ccp4bb] Weak diffraction...

2010-09-08 Thread Daniel Lee
). Crystal size is more than 0.4 um. I tried to do annealing, dehydration and glutaraldehyde use but It does not increase the diffraction. I need some help. I will very appreciate your all comments. Thanks Best, Daniel

Re: [ccp4bb] Why appear the grid on the low resolution areas

2010-09-14 Thread Daniel Picot
crystallographic data. Daniel Le 14/09/2010 02:31, xingliang zhang a écrit : Dear everyone, Recently,we collected data of a native protein crystal on synchrotron in Shanghai. When we did with the original data with HKL2000, we found an unconversant phenomenon ,just as the picture in the enclosure, there

Re: [ccp4bb] heterologous seeding

2010-09-22 Thread Daniel Picot
An old one: Eichele G, Ford GC, Jansonius JN. Crystallization of pig mitochondrial aspartate aminotransferase by seeding with crystals of the chicken mitochondrial isoenzyme. J Mol Biol. 1979 Dec 5;135(2):513-6. PubMed PMID: 537086. Daniel Le 21/09/2010 22:24, Christopher Rife a écrit : Hi

Re: [ccp4bb] Protein melting temperatures

2010-09-23 Thread Daniel Bonsor
There is a nice paper Comput Biol Chem. 2009 Dec;33(6):445-50. Epub 2009 Oct 20. Predicting melting temperature directly from protein sequences. Ku T, Lu P, Chan C, Wang T, Lai S, Lyu P, Hsiao N. They have a list of 35 different proteins with their Tms with the references from where they obtain

Re: [ccp4bb] protein turns brown

2010-09-24 Thread Daniel Bonsor
According to Pierce TCEP is "more" tolerant of nickel and cobalt. However, TCEP is inactivated by other metals, namely copper, magnesium, silver and zinc. Dan Daniel A. Bonsor, Boston Biomedical Research Institute, 64 Grove Street, Watertown, MA 02472 USA

Re: [ccp4bb] Regarding quality of protein for crystallization

2010-09-26 Thread Daniel Bonsor
crystallization can generate a mixture of different species with one of the fragments being more readily crystallizable. There is only one way to find out... Daniel A. Bonsor, Boston Biomedical Research Institute, 64 Grove Street, Watertown, MA 02472 USA

Re: [ccp4bb] difficult P1 crystal

2010-09-30 Thread Daniel Bonsor
There are a couple of papers... Acta Cryst. (2010). F66, 346-351 Crystallization and X-ray diffraction studies of cellobiose phosphorylase from Cellulomonas uda The space group was originally P21. During collection the crystal moved out of the beam (and possibly the cyrostream). Upon recenter

Re: [ccp4bb] difficult P1 crystal

2010-09-30 Thread Daniel Picot
):313-27. PubMed PMID: 6302273. Daniel Le 30/09/2010 16:56, Daniel Bonsor a écrit : There are a couple of papers... Acta Cryst. (2010). F66, 346-351 Crystallization and X-ray diffraction studies of cellobiose phosphorylase from Cellulomonas uda The space group was originally P21. During

mlphare for SAD data

2007-01-19 Thread Daniel Adams
Is there something I am doing wrong in input file or I should fix these parameters ? If yes how ? Thanks in advance Cheers Daniel

Re: [ccp4bb] "B" in B-factor

2007-01-24 Thread Daniel Anderson
An IUCr nomenclature committee once recommended eradication of the "B-factor". Trueblood, et al. Acta Cryst (1996) A52, 770-781. Whether or not the factor of 8 pi squared can be eradicated, the publication is worth reading because it discusses what is modeled by Ueq (times 8 pi squared = B), and it

Re: [ccp4bb] AKTA prime

2007-02-13 Thread Daniel Anderson
Are you sure that you want AKTA anything? They are so expensive. We have had good service from the old style ("HR") Bio-Rad Bio-Logic chromatography systems. The new ones are called "DuoFlow". -Dan On Tue, 13 Feb 2007, Frank Lee wrote: > > Dear all, > > I need to decide between buying an AKTA p

Re: [ccp4bb] Bio-rad DuoFlow

2007-02-14 Thread Daniel Anderson
My direct experience is with the old "HR" pumps, but my remarks apply to the newer "DuoFlow". On Day Zero, I disassemble the pump heads in the order specified in the manual. I re-assemble with grease on the threads, thus preventing expensive repairs due to corrosion of the bolts caused by salty bu

Re: [ccp4bb] Bio-rad DuoFlow

2007-02-14 Thread Daniel Anderson
That was cryptic. My point was that the BioRad pumps are very reliable given some basic care. Its users quickly learn how to use it, as mentioned previously. On Wed, 14 Feb 2007, Daniel Anderson wrote: > My direct experience is with the old "HR" pumps, but my remarks apply t

Re: [ccp4bb] Bio-rad DuoFlow

2007-02-14 Thread Daniel Anderson
It still seems to me strange that Bio-Rad would build a machine that can reach pressures suitable for reverse-phase chromatography, but then not include software control for gradual pump acceleration. I tried to communicate to BioRad corporate suits that many HPLC columns are too fragile for abrupt

[ccp4bb] pseudotranslation and dyads in NCS

2007-02-16 Thread Daniel Adams
this combination of NCS together in DM or resolve ? Is there something I am missing ? Thanks in advance Daniel

[ccp4bb] Fwd: [ccp4bb] pseudotranslation and dyads in NCS

2007-02-19 Thread Daniel Adams
-- Forwarded message -- From: Daniel Adams <[EMAIL PROTECTED]> Date: Feb 16, 2007 12:29 PM Subject: Re: [ccp4bb] pseudotranslation and dyads in NCS To: [EMAIL PROTECTED] My apology for not mentioning unit cell, The P1 unit cell is 74 91 116 109 105 90 Any suggesti

Re: [ccp4bb] phaser oprn error

2007-03-26 Thread Daniel Picot
You may have called the version of phaser installed in the phenix path. Type wich phaser in a terminal to check it. Daniel yang li a écrit : Hi: I am using CCP4 6.0.2, it has phaser contained in this package. When I use it to do mr, error occured

[ccp4bb]

2007-04-17 Thread Daniel Gutmann
good solution (introduction of selmet makes the protein ustable) to make heavy metal derivatives? Best Regards Daniel

Re: [ccp4bb] Eden & SUSE linux libfftw.so.2

2007-06-13 Thread Daniel Schlieper
gards, Daniel -- Daniel Schlieper email: [EMAIL PROTECTED] Molecular Motors Group phone: +44 1883 722306 (x 305) Marie Curie Research Institute fax : +44 1883 714375 The Chart, Oxted RH8 0TL, UK web : http://mc11.mcri.ac.uk

[ccp4bb] Position available EMBL Grenoble

2007-06-20 Thread Daniel Panne
VACANCY NOTICE Laboratoire Européen de Biologie Moléculaire European Molecular Biology Laboratory POSTDOCTORAL FELLOWSHIP IN STRUCTURAL BIOLOGY Duty Station:Grenoble, France Commencing Date: As soon as possible after closing date Job Description: Highly motivated postdoctoral candidates are

Re: [ccp4bb] Oligomer which lacks conformational cooperativity

2007-08-15 Thread Daniel Schlieper
Hi Jacob, as far as I understand it, proteins also oligomerise to share a stable core. For example, some proteins form tetramers and minimise the material needed to form a scaffold around their active centres. Could that be the case for your protein as well? Best regards, Daniel -- Daniel

[ccp4bb] water soluble protein that needs detergent to be stable

2007-08-28 Thread Daniel Jin
Hi, I am working on a 60 kDa C. elegans protein that is predicted to be mostly alpha-helix. It is over-expressed in E.coli and the yield is about 1 mg/L of cell culture. The CD spec at 4 degree showed the presence of dominant alpha-helix. However, we don’t have any functional assay to conf

Re: [ccp4bb] water soluble protein that needs detergent to be stable

2007-08-29 Thread Daniel Picot
detergent. I stop here because I find always very difficult to extrapolate the effect of detergent from membrane protein to soluble protein. Daniel Daniel Jin a écrit : > Hi, > > I am working on a 60 kDa C. elegans protein that is predicted to be > mostly alpha-helix. It is over-express

Re: [ccp4bb] R-sleep

2007-10-01 Thread Daniel Schlieper
this value calculated at each refinement step? Best regards, Daniel On Mon, 1 Oct 2007, Ian Tickle wrote: > [...] > we are working with an observation/parameter count ratio of say < > 3 (naturally I'm counting the geometric restraints with the X-ray > observations). >

Re: [ccp4bb] How to show density map in pymol?

2007-10-31 Thread Daniel Schlieper
s renamed map (e.g. fwt.ccp4) can be opened in pymol. [...]" -- Daniel Schlieper email: [EMAIL PROTECTED] Molecular Motors Group phone: +44 1883 722306 (x 305) Marie Curie Research Institute fax : +44 1883 714375 The Chart, Oxted RH8 0TL, UK web

Re: [ccp4bb] His tag on membrane protein

2007-11-23 Thread Daniel Picot
His6. Many other structure of membrane protein have used His-tag, but still not enough to make sound statistics. Daniel deliang a écrit : Hi there, I purified a membrane protein with traditional His-tag on the C terminal. Before crystallization, I wonder how this tag may affect the result

[ccp4bb] how to change a membrane protein into a water soluble protein?

2007-12-03 Thread Daniel Jin
Hi, I am wondering whether there is a way to turn a membrane protein with known crystal structure into a water soluble protein by systematic mutagenesis. I guess it should be doable if we introduce enough hydrophilic residues on the surface. Has anyone tested this crazy idea before? Thank

[ccp4bb] protein expression problem

2008-01-21 Thread Daniel Jin
Hi, I have been trying to express a rat protein in bacteria. The MBP-fusion expressed at very high level (~ 40 mg/L) while the GST-fusion and His-tag only gave inclusion bodies. The problem is that all protein runs in the void volume on a size-exclusion column (s-200, hepes, pH 7.4, 200 mM

[ccp4bb] protein expression

2008-03-04 Thread Daniel Jin
Hi, I have a protein with two independently folded domains. I can express either one in bacteria with pretty good expression yield. However, when I put them together with a linker, the expression drops significantly. I can barely see any soluble protein and most of it is now inclusion bodi

Re: [ccp4bb] Color of heme containing Xtals

2008-03-13 Thread Daniel Picot
Jan, Crystals containing haem protein are not necessarily red, the colour depends on the oxidation state of the haem and on the haem/protein ratio. A FeIII haem will look yellowish, gold or brown depending on the haem/protein ratio, while an FeII haem will look more pink or red. Daniel Ian

[ccp4bb] 3D mouse?

2008-03-18 Thread Daniel Schlieper
Hi, has anybody tried 3dconnexion's space mouse with O, coot or ccp4mg? How does it compare to a normal mouse or to a 6 knob rotary encoder? http://www.3dconnexion.com/ Best regards, Daniel -- Daniel Schlieper email: [EMAIL PROTECTED] Molecular Motors

Re: [ccp4bb] Broken Masks

2008-03-18 Thread Daniel Anderson
COOT and CCP4mg ? -- *** Daniel Anderson, Ph.D. Email: [EMAIL PROTECTED] Phone: 310-206-3642 Fax: 310-206-3914 Howard Hughes Medical Institute at University of California Los Angeles Lab: Paul Boyer Hall Room 219 For US Postal Service and 2-dimensional, use: Box 951662 MRL5-748 Los Angeles, CA 90095-1662

[ccp4bb] Postdoctoral position in Paris

2008-04-04 Thread Daniel Picot
Posted on behalf of Jean-Luc Popot; please send enquiries/applications to him directly ([EMAIL PROTECTED]) : Position offer Physico-Chimie Moléculaire des Membranes Biologiques, CNRS/Université Paris 7 UMR 7099, IBPC, 13 rue Pierre et Marie Curie, F-75005 Paris – France Post-doctoral position

[ccp4bb] Off topic: insect cell expression

2008-06-12 Thread Daniel Jin
Hi there,   Sorry for the off topic questions. We need your feedback.   We are expressing a rat protein in insect cells. It is expressed as a secreted protein with an N-terminal 6xHis tag. We can get about 4 mg of it from 1L culture and everything looked quite normal at the very beginning (at 4C)

[ccp4bb] dna-rna restraints in CNS

2008-07-08 Thread Panne Daniel
after the 'planarity-restraints' statement. best, Daniel On Jul 8, 2008, at 1:00 AM, CCP4BB automatic digest system wrote: does anyone know how to change the weighting of the Watson-Crick base pair restraints using the dna-rna_restraints.def restraints definition file in CNS? We are

Re: [ccp4bb] Imidazole's ability to chelate metal ions

2008-07-18 Thread Daniel Schlieper
. Best regards, Daniel -- Daniel Schlieper email: [EMAIL PROTECTED] Molecular Motors Group phone: +44 1883 722306 (x 305) Marie Curie Research Institute fax : +44 1883 714375 The Chart, Oxted RH8 0TL, UK web : http://mc11.mcri.ac.uk On Fri, 18 Jul

Re: [ccp4bb] 27.5% R/29% Rfree for 1.75A structure (details updated)

2008-07-30 Thread Daniel Schlieper
Dear Jinjin Zhang, what happens if you treat your data as perfect twin? Maybe you do have a twin after all. Best regards, Daniel -- Daniel Schlieper email: [EMAIL PROTECTED] Molecular Motors Group phone: +44 1883 722306 (x 305) Marie Curie Research Institute

[ccp4bb] peptide for co-crystallization

2008-08-27 Thread Daniel Jin
Hi,   We would like to order two peptides for co-crystallizaiton. I notice that there is a big price jump for peptide over 95% pure and over 98% pure. Do you think 95% purity is good enough? Another choice is to order crude peptides and purify by ourselves. Crude peptide is much cheaper. But we

[ccp4bb] MrBump Installation ccp4

2008-09-17 Thread Daniel Wohlwend
ition of ClustalW did not oppose a problem. Can anybody help us? Where do we have to put Fasta35 in order to continue the installation of MrBump? Or is something possibly wrong with the permissions (global or local)? If anyone has an idea, please let us know! Thanks a lot in advance! Daniel D

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