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1utg

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{{STRUCTURE_1utg| PDB=1utg | SCENE= }}
{{STRUCTURE_1utg| PDB=1utg | SCENE= }}
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'''REFINEMENT OF THE C2221 CRYSTAL FORM OF OXIDIZED UTEROGLOBIN AT 1.34 ANGSTROMS RESOLUTION'''
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===REFINEMENT OF THE C2221 CRYSTAL FORM OF OXIDIZED UTEROGLOBIN AT 1.34 ANGSTROMS RESOLUTION===
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==Overview==
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The structure of uteroglobin, a progesterone binding protein from rabbit uterine fluid, was determined and refined at 1.34 A resolution to a conventional R-factor of 0.229. The accuracy of the co-ordinates is estimated to be 0.15 A. The isotropic temperature factor of individual atoms was refined and its average value is 11.9 A2 for the 548 non-hydrogen atoms of the protein monomer. A total of 83 water molecules was located in difference electron density maps and refined, first using a constant occupancy factor of 1 and then variable occupancy, the final (Q) being 0.63. The mean temperature factor of the water oxygen atoms is 26.4 A2. Uteroglobin is a dimer and its secondary structure consists of four alpha-helices per monomer that align in an anti-parallel fashion. There is one beta-turn between helix 2 and helix 3 (Lys26 to Glu29); 76% of the residues are part of the alpha-helices. In the core of the dimeric protein molecule, between the two monomers that are held together by two disulfide bridges, we have observed a closed cavity. Its length is 15.6 A and its width is 9 A; 14 water molecules could be positioned inside. In the "bottom" part of the protein, near the C terminus, we have observed a smaller cavity, occupied by two water molecules. The calculation of the molecular surface revealed four surface pockets whose possible functional implications are discussed below.
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(as it appears on PubMed at http://www.pubmed.gov), where 3656405 is the PubMed ID number.
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{{ABSTRACT_PUBMED_3656405}}
==About this Structure==
==About this Structure==
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[[Category: Vaney, M C.]]
[[Category: Vaney, M C.]]
[[Category: Steroid binding]]
[[Category: Steroid binding]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 11:39:56 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jul 28 12:57:00 2008''

Revision as of 09:57, 28 July 2008

Template:STRUCTURE 1utg

REFINEMENT OF THE C2221 CRYSTAL FORM OF OXIDIZED UTEROGLOBIN AT 1.34 ANGSTROMS RESOLUTION

Template:ABSTRACT PUBMED 3656405

About this Structure

1UTG is a Single protein structure of sequence from Oryctolagus cuniculus. Full crystallographic information is available from OCA.

Reference

Refinement of the C222(1) crystal form of oxidized uteroglobin at 1.34 A resolution., Morize I, Surcouf E, Vaney MC, Epelboin Y, Buehner M, Fridlansky F, Milgrom E, Mornon JP, J Mol Biol. 1987 Apr 20;194(4):725-39. PMID:3656405

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