Re: [ccp4bb] Ligand electron density

2017-04-02 Thread benjamin bax
Hi, A think a detailed discussion is off topic for CCP4 bb. https://www.quantiki.org/wiki/quantum-sock-theory Ben On 2 Apr 2017, at 00:31, Phoebe A. Rice wrote: At long last, a brilliant theoretical framework for observations previously dismissed as mere discrepancies! This being Saturday

Re: [ccp4bb] Ligand electron density

2017-04-02 Thread Bernhard Rupp
Without discussion of the Sohnke groups of chiral hosons this theory is wowefully incomplete. Gert's paper however opens up the exciting proposition of the presence of chirase impurities in enzyme-based laundry detergents. Br On Apr 2, 2017 9:48 AM, "benjamin bax" wrote: Hi, A think a detail

Re: [ccp4bb] binding protein to nickel column

2017-04-02 Thread chiara ardiccioni
I have a similar issue because I have a lot of protein in the unbound fraction. Maybe the his-tag is not well exposed... Have you tried to use Ni-NTA beads and binding overnight? How long is your his-tag? Best, Chiara Da: CCP4 bulletin board per conto di Mark

[ccp4bb] PhD scholarship at Massey University, New Zealand

2017-04-02 Thread Sutherland-Smith, Andrew
Dear All, Applications are being sought for: PhD scholarship at the Institute of Fundamental Sciences, Massey University, Palmerston North, New Zealand Project title: Solving the end-cap structure of a biological nanorod derived from the Ff bacteriophage (f1, M13 or fd) Academic mentors: A/Pro

[ccp4bb] Using a codon-optimised gene to improve protein solubility

2017-04-02 Thread Sutapa Chakrabarti
Dear All, We’re trying to express and purify a 1000 residue long protein and have run into the problem that it is completely insoluble when expressed in E.coli and is not expressed at all in insect cells. The usual tricks for improving solubility in E.coli, such as addition of GST/MBP tags, opt

Re: [ccp4bb] Using a codon-optimised gene to improve protein solubility

2017-04-02 Thread Hansman, Grant
Hi, Why don't you try adding GST/MBP tags first? This is a easy quick test. We have a nice fusion (MBP) vector for e.coli expression if you want. Grant From: Sutapa Chakrabarti mailto:chakr...@zedat.fu-berlin.de>> Reply-To: Sutapa Chakrabarti mailto:chakr...@zedat.fu-berlin.de>> Date: Monday