Re: [ccp4bb] [SPAM:#] [ccp4bb] O/T: can a protein which dimerizes in solution crystallize as a monomer?

2008-12-11 Thread Jan Dohnalek
I would strongly argue against protein crystals (in most cases) being solid state. Most of the surface of a molecule is actually solvated and protein crystals as they are miss some of the typical properties of "solid state". Although in some cases oligomerization occuring upon protein crystalliza

Re: [ccp4bb] [SPAM:#] [ccp4bb] O/T: can a protein which dimerizes in solution crystallize as a monomer?

2008-12-11 Thread Jayashankar
Here we are dealing with two different state of chemistry, solid state and solution state, If one of the minima in solid state resembles the biological state minimum, then there is a possiblw way to clearly define the biology and its significant interaction of that particular 'mer' of a protein, o

Re: [ccp4bb] [SPAM:#] [ccp4bb] O/T: can a protein which dimerizes in solution crystallize as a monomer?

2008-12-11 Thread Phoebe Rice
Mass action is on the crystal's side. Two recent examples of proteins that are dimers by standard solution assays, but form weak/transient/co-factor-dependent tetramers to function, and those tetramers are seen in the crystal. (There is good solution data to back up the relevance of the tetramer i