1ld0

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Theoretical Model: The protein structure described on this page was determined theoretically, and hence should be interpreted with caution.


1ld0 ()
Resources: FirstGlance, PDBsum
Coordinates: save as pdb, mmCIF, xml


THEORETICAL MODEL OF HUMAN GAMMA D CRYSTALLIN

Publication Abstract from PubMed

The lens is composed of highly stable and long-lived proteins, the crystallins which are divided into alpha-, beta-, and gamma-crystallins. Human gamma-crystallins belong to the betagamma superfamily. A large number of gamma-crystallins have been sequenced and have been found to share remarkable sequence homology with each other. Some of the gamma-crystallins from various sources have also been elucidated structurally by X-ray crystallographic or NMR spectroscopic experiments. Their three-dimensional structures are also similar having consisted of two domains each possessing two Greek key motifs. In this study we have constructed the comparative or homology models of the four major human gamma-crystallins, gammaA-,gammaB-, gammaC-, and gammaD-crystallins and studied the charge network in these crystallins. Despite an overall structural similarity between these crystallins, differences in the ion pair formation do exist which is partly due to the differences in their primary sequence and partly due to the structural orientation of the neighboring amino acids. In this study, we present an elaborate analysis of these charged interactions and their formation or loss with respect to the structural changes.

Homology models of human gamma-crystallins: structural study of the extensive charge network in gamma-crystallins., Salim A, Zaidi ZH, Biochem Biophys Res Commun. 2003 Jan 17;300(3):624-30. PMID:012507494

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

Reference

  • Salim A, Bano A, Zaidi ZH. Prediction of possible sites for posttranslational modifications in human gamma crystallins: effect of glycation on the structure of human gamma-B-crystallin as analyzed by molecular modeling. Proteins. 2003 Nov 1;53(2):162-73. PMID:14517968 doi:10.1002/prot.10493

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