[gmx-users] Meaning of n-n hydrogen bond

ksr at chemistry.umass.edu ksr at chemistry.umass.edu
Wed Apr 25 22:43:31 CEST 2007


Gly is not an L-amino acid and can thus populate L-alpha & R-alpha as well as L-
beta & R-beta space with the same energetic cost. I was simply commenting on the
(almost) unique properties of Asp/Asn to i to i h-bond. I'm sure that Glu/Gln
has the ability, but you've got to freeze out more degrees of freedom C(beta)
and C(gamma) vs. C(beta) only to get that H-bond and entropy starts to beat
enthalpy...

K


Quoting David van der Spoel <spoel at xray.bmc.uu.se>:

> ksr at chemistry.umass.edu wrote:
> > Chetana,
> >
> > You need to look at the structure of these residues. Several amino acids,
> > notably Asp and Asn can i to i sidechain to backbone h-bond. For those two
> it
> > typically occurs in the alphaL conformational space (what David was
> alluding
> > to), which is why Asp and Asn are (relatively) often found there.
> >
> > Peace,
> >
> >
> Gly can do it in the backbone too.
>
> --
> David.
> ________________________________________________________________________
> David van der Spoel, PhD, Assoc. Prof., Molecular Biophysics group,
> Dept. of Cell and Molecular Biology, Uppsala University.
> Husargatan 3, Box 596,  	75124 Uppsala, Sweden
> phone:	46 18 471 4205		fax: 46 18 511 755
> spoel at xray.bmc.uu.se	spoel at gromacs.org   http://folding.bmc.uu.se
> ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> _______________________________________________
> gmx-users mailing list    gmx-users at gromacs.org
> http://www.gromacs.org/mailman/listinfo/gmx-users
> Please search the archive at http://www.gromacs.org/search before posting!
> Please don't post (un)subscribe requests to the list. Use the
> www interface or send it to gmx-users-request at gromacs.org.
> Can't post? Read http://www.gromacs.org/mailing_lists/users.php
>





More information about the gromacs.org_gmx-users mailing list