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1gpd

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[[Image:1gpd.gif|left|200px]]
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{{STRUCTURE_1gpd| PDB=1gpd | SCENE= }}
{{STRUCTURE_1gpd| PDB=1gpd | SCENE= }}
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'''STUDIES OF ASYMMETRY IN THE THREE-DIMENSIONAL STRUCTURE OF LOBSTER D-GLYCERALDEHYDE-3-PHOSPHATE DEHYDROGENASE'''
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===STUDIES OF ASYMMETRY IN THE THREE-DIMENSIONAL STRUCTURE OF LOBSTER D-GLYCERALDEHYDE-3-PHOSPHATE DEHYDROGENASE===
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==Overview==
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An improved electron density map of lobster holo-D-glyceraldehyde-3-phosphate dehydrogenase has been computed to 2.9 A resolution based on two heavy atom isomorphous derivatives. This has been averaged only over the Q molecular 2-fold axis, which is known to be exact in the human holoenzyme. The map showed possible asymmetry between the subunits in which the active centers are closely related across the R axis (that is, between the red and green or between the yellow and blue subunits). A difference map between the electron density of citrate and sulfate-soaked crystals gave further evidence for possible asymmetry. The major differences of electron density between R axis-related subunits appear around the active center and suggest the following interpretations. 1. The conformation of the adenine about the glycosidic bond is the more frequently observed anti with a C-2' endo conformation for the ribose ring in the red and yellow subunits, but is probably syn with a C-3' endo conformation in the green and blue subunits.2. The adenine ribose has its 3'-hydroxyl group hydrogen-bonded to a main chain carbonyl group in the red and yellow subunits but not in the green and blue subunits, as a consequence of the differing ribose conformations. 3. Cysteine-149 is more closely associated with histidine-176 in the green and blue subunits, and appears nearer the nicotinamide in the red and yellow subunits.
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(as it appears on PubMed at http://www.pubmed.gov), where 127793 is the PubMed ID number.
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{{ABSTRACT_PUBMED_127793}}
==About this Structure==
==About this Structure==
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[[Category: Rossmann, M G.]]
[[Category: Rossmann, M G.]]
[[Category: Sabesan, M N.]]
[[Category: Sabesan, M N.]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 17:51:17 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Jul 1 05:38:39 2008''

Revision as of 02:38, 1 July 2008

Image:1gpd.png

Template:STRUCTURE 1gpd

STUDIES OF ASYMMETRY IN THE THREE-DIMENSIONAL STRUCTURE OF LOBSTER D-GLYCERALDEHYDE-3-PHOSPHATE DEHYDROGENASE

Template:ABSTRACT PUBMED 127793

About this Structure

1GPD is a Single protein structure of sequence from Homarus americanus. Full crystallographic information is available from OCA.

Reference

Studies of asymmetry in the three-dimensional structure of lobster D-glyceraldehyde-3-phosphate dehydrogenase., Moras D, Olsen KW, Sabesan MN, Buehner M, Ford GC, Rossmann MG, J Biol Chem. 1975 Dec 10;250(23):9137-62. PMID:127793

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