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 <[EMAIL PROTECTED]>: > [EMAIL PROTECTED] 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 > [EMAIL PROTECTED] [EMAIL PROTECTED] http://folding.bmc.uu.se > ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ > _______________________________________________ > gmx-users mailing list [email protected] > 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 [EMAIL PROTECTED] > Can't post? Read http://www.gromacs.org/mailing_lists/users.php > _______________________________________________ gmx-users mailing list [email protected] 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 [EMAIL PROTECTED] Can't post? Read http://www.gromacs.org/mailing_lists/users.php
