Re: [ccp4bb]: STructure question!

[Richard Gillilan <reg8@cornell.edu>]

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I may have a similar problem. I'm looking at a structure
with the last several residues (CTERM end)unresolved
and wondering if the chain is long enough to contribute to a 
protein-protein interface nearby. The maximum conformationally
extended distance of the chain will certainly give an upper bound
but, in reality, the chain has to wrap around the protein surface, and the 
effective distance to the site is longer. Seems like the only 
way to know is via simulation.  Any ideas? 

Richard Gillilan
MacCHESS, Cornell



> rams@poori.biochem.uiowa.edu wrote:
> >
> > Hello all!
> >
> > This is not a crystallography question related to 'O' or 'CCP4' directly.
> > I apologize, but this  is a protein structure question.
> >
> > If I have a 9 residue peptide, what is the farthest distance between the
> > C-alpha atoms of the 1st and 9th residue. I know that ca-ca is 3.8A.  But
> > I am not sure if it is 3.8x9 or is it different - can it be longer?
> >
> > Thanks.
> >
> > Rams.