Re: [ccp4bb] Crystallisation of a extremly soluble protein

2007-02-22 Thread Savvas Savvides
Hi Sabine, I vaguely recall that an old colleague had used a mini detergent screen (as additive) to solve a problem such as yours. It may be worth setting up a plate or two to screen a few conditions before you embark into more molbio. You can use the 96 well plates with multiple wells (Corning sel

Re: [ccp4bb] Crystallisation of a extremly soluble protein

2007-02-22 Thread Christian Schleberger
Hello Sabine, Maybe this is an option: Structure, Vol 14, 1617-1622, November 2006 Lysine Methylation as a Routine Rescue Strategy for Protein Crystallization best regards & good luck Christian Schneider Sabine wrote: > > Hi everyone, > > > > I am trying to crystallise an extremely soluble

Re: [ccp4bb] Crystallisation of a extremly soluble protein

2007-02-22 Thread Kendall Nettles
: Schneider Sabine <[EMAIL PROTECTED]> Reply-To: Schneider Sabine <[EMAIL PROTECTED]> Date: Thu, 22 Feb 2007 14:08:44 - To: Conversation: Crystallisation of a extremly soluble protein Subject: [ccp4bb] Crystallisation of a extremly soluble protein Hi everyone, I am trying to crystallise

Re: [ccp4bb] Crystallisation of a extremly soluble protein

2007-02-22 Thread David R. Cooper
Hello, Sabine. I believe the technique that Kendall is referring to is Surface Entropy Reduction, which involves replacing large, highly entropic residues on the surface of the protein with lower entropy residues to reduce the entropy shield and facilitate crystallization. Traditionally, the

Re: [ccp4bb] Crystallisation of a extremly soluble protein

2007-02-22 Thread Kendall Nettles
Sabine, There are protocols to modify surface residues that can help with crystallization, and make the protein less soluble. Unfortunately, I¹m drawing a blank on the details. I remember someone in Andrzej Joachimiak¹s group was working on this as a rescue approach for the structural genomics pip

[ccp4bb] Crystallisation of a extremly soluble protein

2007-02-22 Thread Schneider Sabine
Hi everyone, I am trying to crystallise an extremely soluble and charged protein. It is ~30kDa and has an estimated PI of 5.2 and theoretical charge over pH range 4-10 from + 24 to -29. It is still happy at a concentration of 190mg/ml and fully reconstituted with its ligand. I have tried h