[ccp4bb] Experimental phasing with 50% twin

2011-05-13 Thread Phil Evans
We're trying to solve a 50% twin crystal by experimental phasing (SAD & SIRAS) since molecular replacement hasn't worked. The crystals diffract very well in apparent space group P62 2 2. A Hg derivative shows a strong apparent anomalous signal (from half-dataset correlations etc), but we've fail

[ccp4bb] Internship in London

2011-05-13 Thread Michael Krug
Dear all, a student doing a practical training course at the MX-group at BESSY II in Berlin is looking for an internship in London: Hello, I study Biochemistry (diploma) at Freie Universität Berlin and I am in my eighth semester. At the moment I intern at MX-group at BESSY II Helmholtz Zentrum Be

Re: [ccp4bb] B factor

2011-05-13 Thread Arjen
Hi Amit, you can manually define the range of a spectrum in PyMol: spectrum [parameter], [spectrum type], minimum=[min], maximum=[max] --> if you want to color according to B-factor this will translate to e.g. : spectrum b, blue_white_red, minimum=0, maximum=50 hth, Arjen On May 12, 2011,

Re: [ccp4bb] B factor

2011-05-13 Thread Arjen
Hi Amit, you can manually define the range of a spectrum in PyMol: spectrum [parameter], [spectrum type], minimum=[min], maximum=[max] --> if you want to color according to B-factor this will translate to e.g. : spectrum b, blue_white_red, minimum=0, maximum=50 hth, Arjen On May 12, 2011,

[ccp4bb] problems installing arp warp

2011-05-13 Thread Kendall Nettles
I'm trying to install ARP WARP on my mac and I'm getting the following error message. I installed the latest ccp4 and ccp4i from disk image. Thanks for your help, Kendall Nettles Checking CCP4 & ARP/wARP installation - One of the variables $CBIN, $CCP4_SCR or $BINSORT_SCR is not define

Re: [ccp4bb] how convert SF to intensities

2011-05-13 Thread Eleanor Dodson
On 05/12/2011 08:13 PM, Fulvio Saccoccia wrote: Dear ccp4 users, I need to generate intensities from a model (.pdb). That is, I think that a correct procedure could be to convert model to structure factor and then obtain intensities squaring the SF. Does anyone know how can I do? Thanks in advan

Re: [ccp4bb] problems installing arp warp

2011-05-13 Thread Saul Hazledine
Hello Kendall, On May 13, 2011, at 2:14 PM, Kendall Nettles wrote: > Checking CCP4 & ARP/wARP installation - > > One of the variables $CBIN, $CCP4_SCR or $BINSORT_SCR is not defined > Please check your CCP4 installation > > Please check your ARP/wARP and CCP4 installation This error appears

Re: [ccp4bb] how convert SF to intensities

2011-05-13 Thread George T. DeTitta
That would tale you half the way there. You then have to apply a reverse Lp correction to get a number within a scale factor (diffraction volume, angular velocity) of an ob servable quantity - assuming that's the goal. Sent via BlackBerry by AT&T -Original Message- From: Eleanor Dodso

[ccp4bb] mutation and minimization - SUMMARY

2011-05-13 Thread Andreas Förster
First off, thanks to all those who sent me their suggestions, a great variety indeed. Here's the summary: - turbo-frodo can do local rotamer optimization based on environment. - SCRWL and WHAT-IF are servers for homology modeling - Swiss PDB viewer/DeepView can also do homology modeling, but no

[ccp4bb] highly glycosylated protein

2011-05-13 Thread Wei Li
Dear all, I am working on a high glycosylated protein, which was produced from HEK293 cells. Last time I added glycosylation inhibitor, the protein could exist some monomers and dimers in a buffer pH5.4. This time I didn't add glycosylation inhibitor, the protein seems highly aggregated and

[ccp4bb] MrBUMP, P43212 and P41212

2011-05-13 Thread Miguel Ortiz Lombardía
Dear all, I get this unexpected (by me) message from MrBUMP: Reindex Warning: spacegroup P43212 does not have an enantiomorph I thought P41212 and P43212 were enantiomorphs... So, am I wrong ? (PS: I'm looking for indications on how to use MrBUMP on a cluster with a SGE queueing system. Any poi

Re: [ccp4bb] highly glycosylated protein

2011-05-13 Thread Pascal Egea
Hi Wei, Glycosylation usually stabilize proteins although it is a source of structural heterogeneity for us crystallographers.Since you are expressing in HEK293 cells, there is a strain of cells that is deficient for glycosylation (it was designed by Gobind Khorana at the MIT I believe). You may w

[ccp4bb] Rasmol

2011-05-13 Thread REX PALMER
Does anyone know how to select an atom and rotate the image about this point in Rasmol?   Rex Palmer Birkeck College

Re: [ccp4bb] mutation and minimization

2011-05-13 Thread Eric Pettersen
On May 12, 2011, at 4:00 PM, CCP4BB automatic digest system wrote: Hey all, I would like to introduce point mutations in a structure and quickly (and dirtily) minimize the new residue. (Best rotamer dependent on local environment, or the like.) What are simple approaches that don't involve

[ccp4bb] research paper

2011-05-13 Thread Jung-Hoon Lee
Dear all, I would appreciate it if anyone could provide me with a copy of this research paper (PDF file): J. Appl. Cryst. (2009). 42, 743-744[ doi:10.1107/S0021889809021700 (http://dx.doi.org/10.1107/S0021889809021700) ] Rigorous filtration for protein crystallizationThank you so much !

Re: [ccp4bb] Rasmol

2011-05-13 Thread Roger Rowlett
Rex, Issue the command 'center [_expression_]' For example 'center asp44:a.ca' would center rotation about c-alpha of Asp44 in chain A. Cheers. On 5/13/2011 3:56 PM, REX PALMER wrote:

Re: [ccp4bb] mutation and minimization

2011-05-13 Thread Brett, Thomas
On a similar extension to this topic, is there a good software out there for doing these kinds of modifications and minimizations for protein structures with chemicals entities (i.e., protein/inhibitor complexes). What I am looking to do is take a protein/inhbitor complex and add chemical modifi

[ccp4bb] Screening chemicalentities (ligands) with little structural modifications

2011-05-13 Thread Saugata Hazra
I wouldn't consider your case as the extension of the previous problem. Here your goal is to change the ligands/chemical entities and not the protein. For your problem, I would prefer to go in following steps, Step 1: Make different modifications of small molecules according to your choice unle

Re: [ccp4bb] MrBUMP, P43212 and P41212

2011-05-13 Thread martyn . winn
I thought so too It seems to me that there is a typo in the spacegroup name in the code. I'll send you some fixed files offline. Ronan is the expert on queueing systems, but I though the keyword "CLUSTER" should be enough. It is supposed to work with SGE. There also seems to be an undocume

Re: [ccp4bb] mutation and minimization

2011-05-13 Thread Eric Pettersen
On May 13, 2011, at 4:00 PM, Tom J. Brett wrote: On a similar extension to this topic, is there a good software out there for doing these kinds of modifications and minimizations for protein structures with chemicals entities (i.e., protein/inhibitor complexes). What I am looking to do is t