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1j0x

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Revision as of 11:17, 21 February 2008 by OCA (Talk | contribs)
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Image:1j0x.gif

1j0x, resolution 2.4Å

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Crystal structure of the rabbit muscle glyceraldehyde-3-phosphate dehydrogenase (GAPDH)

Overview

The crystal structure of the tetrameric form of D-glyceraldehyde-3-phosphate dehydrogenase (GAPDH) isolated from rabbit muscle was solved at 2.4 A resolution after careful dynamic light-scattering experiments to find a suitable buffer for crystallization trials. The refined model has a crystallographic R factor of 20.3%. Here, the first detailed model of a mammalian GAPDH is presented. The cofactor NAD(+) (nicotinamide adenine dinucleotide) is bound to two subunits of the tetrameric enzyme, which is consistent with the negative cooperativity of NAD(+) binding to this enzyme. The structure of rabbit-muscle GAPDH is of interest because it shares 91% sequence identity with the human enzyme; human GAPDH is a potential target for the development of anti-apoptotic drugs. In addition, differences in the cofactor-binding pocket compared with the homology-model structure of GAPDH from the malaria parasite Plasmodium falciparum could be exploited in order to develop novel selective and potential antimalaria drugs.

About this Structure

1J0X is a Single protein structure of sequence from Oryctolagus cuniculus with as ligand. Active as Glyceraldehyde-3-phosphate dehydrogenase (phosphorylating), with EC number 1.2.1.12 Full crystallographic information is available from OCA.

Reference

Structure of rabbit-muscle glyceraldehyde-3-phosphate dehydrogenase., Cowan-Jacob SW, Kaufmann M, Anselmo AN, Stark W, Grutter MG, Acta Crystallogr D Biol Crystallogr. 2003 Dec;59(Pt 12):2218-27. Epub 2003, Nov 27. PMID:14646080

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