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1gcg
From Proteopedia
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|PDB= 1gcg |SIZE=350|CAPTION= <scene name='initialview01'>1gcg</scene>, resolution 1.9Å | |PDB= 1gcg |SIZE=350|CAPTION= <scene name='initialview01'>1gcg</scene>, resolution 1.9Å | ||
|SITE= | |SITE= | ||
| - | |LIGAND= <scene name='pdbligand=CA:CALCIUM ION'>CA</scene> | + | |LIGAND= <scene name='pdbligand=CA:CALCIUM+ION'>CA</scene> |
|ACTIVITY= | |ACTIVITY= | ||
|GENE= | |GENE= | ||
| + | |DOMAIN= | ||
| + | |RELATEDENTRY= | ||
| + | |RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1gcg FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1gcg OCA], [http://www.ebi.ac.uk/pdbsum/1gcg PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1gcg RCSB]</span> | ||
}} | }} | ||
| Line 24: | Line 27: | ||
[[Category: Flocco, M M.]] | [[Category: Flocco, M M.]] | ||
[[Category: Mowbray, S L.]] | [[Category: Mowbray, S L.]] | ||
| - | [[Category: CA]] | ||
[[Category: galactose-binding protein]] | [[Category: galactose-binding protein]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Mar 30 20:41:26 2008'' |
Revision as of 17:41, 30 March 2008
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| , resolution 1.9Å | |||||||
|---|---|---|---|---|---|---|---|
| Ligands: | |||||||
| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
THE 1.9 ANGSTROMS X-RAY STRUCTURE OF A CLOSED UNLIGANDED FORM OF THE PERIPLASMIC GLUCOSE(SLASH)GALACTOSE RECEPTOR FROM SALMONELLA TYPHIMURIUM
Overview
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.
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
Page seeded by OCA on Sun Mar 30 20:41:26 2008
