1gcg

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{{STRUCTURE_1gcg| PDB=1gcg | SCENE= }}
{{STRUCTURE_1gcg| PDB=1gcg | SCENE= }}
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'''THE 1.9 ANGSTROMS X-RAY STRUCTURE OF A CLOSED UNLIGANDED FORM OF THE PERIPLASMIC GLUCOSE(SLASH)GALACTOSE RECEPTOR FROM SALMONELLA TYPHIMURIUM'''
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===THE 1.9 ANGSTROMS X-RAY STRUCTURE OF A CLOSED UNLIGANDED FORM OF THE PERIPLASMIC GLUCOSE(SLASH)GALACTOSE RECEPTOR FROM SALMONELLA TYPHIMURIUM===
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==Overview==
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The three-dimensional structure of a ligand-free closed form of the glucose/galactose binding protein from Salmonella typhimurium has been determined at a resolution of 1.9 A. The crystallographic R-factor for the refined structure is 17.9%. The model contains all the atoms of the 309 residues of the protein sequence, a calcium ion, and 174 water molecules. The root mean square (r.m.s.) deviations for the whole molecule are: 0.010 A for bond lengths and 2.44 degrees for bond angles, indicating a good stereochemistry for the model. This structure shows that the protein is able to close in the absence of ligand, adopting a conformation similar to the liganded form but slightly more open. Water molecules satisfy the hydrogen bonding ability of the hydrophilic side chains of the binding site in a manner which is reminiscent of the sugars' hydrogen-bonding patterns. Since packing forces are weak, the crystallization event is unlikely to trigger a change from an open to a closed conformation. Instead, the latter must be one of the species in equilibrium in solution which is selected by packing in the crystal lattice.
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{{ABSTRACT_PUBMED_8132630}}
==About this Structure==
==About this Structure==
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[[Category: Mowbray, S L.]]
[[Category: Mowbray, S L.]]
[[Category: Galactose-binding protein]]
[[Category: Galactose-binding protein]]
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Revision as of 02:04, 1 July 2008

Image:1gcg.png

Template:STRUCTURE 1gcg

THE 1.9 ANGSTROMS X-RAY STRUCTURE OF A CLOSED UNLIGANDED FORM OF THE PERIPLASMIC GLUCOSE(SLASH)GALACTOSE RECEPTOR FROM SALMONELLA TYPHIMURIUM

Template:ABSTRACT PUBMED 8132630

About this Structure

1GCG is a Single protein structure of sequence from Salmonella typhimurium. Full crystallographic information is available from OCA.

Reference

The 1.9 A x-ray structure of a closed unliganded form of the periplasmic glucose/galactose receptor from Salmonella typhimurium., Flocco MM, Mowbray SL, J Biol Chem. 1994 Mar 25;269(12):8931-6. PMID:8132630

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