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2hbg

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{{STRUCTURE_2hbg| PDB=2hbg | SCENE= }}
{{STRUCTURE_2hbg| PDB=2hbg | SCENE= }}
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'''GLYCERA DIBRANCHIATA HEMOGLOBIN. STRUCTURE AND REFINEMENT AT 1.5 ANGSTROMS RESOLUTION'''
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===GLYCERA DIBRANCHIATA HEMOGLOBIN. STRUCTURE AND REFINEMENT AT 1.5 ANGSTROMS RESOLUTION===
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==Overview==
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The coelomic cells of the common marine bloodworm Glycera dibranchiata contain several hemoglobin monomers and polydisperse polymers. We present the refined structure of one of the Glycera monomers at 1.5 A resolution. The molecular model for protein and ordered solvent for the deoxy form of the Glycera monomer has been refined to a crystallographic R-factor of 12.7% against an X-ray diffraction dataset at 1.5 A resolution. The positions of 1095 protein atoms have been determined with a maximum root-mean-square (r.m.s.) error of 0.13 A, and the r.m.s. deviation from ideal bond lengths is 0.015 A and from ideal bond angles is 1.0 degree. The r.m.s. deviation of planar groups from their least-squares planes is 0.007 A, and the r.m.s. deviation for torsion angles is 1.2 degrees for peptide groups and 16.8 degrees for side-chains. A total of 153 water molecules has been located, and they have been refined to a final average occupancy of 0.80. Multiple conformations have been found for five side-chains, and a change has been suggested for the sequence at five residues. The heme group is present in the "reverse" orientation that differs only in the positions of the vinyl beta-carbons from the "normal" orientation. The doming of the heme towards the proximal side, and the bond distances and angles of the heme and proximal histidine are typical of most deoxy globin structures. The substitution of leucine for the distal histidine residue (E7) creates an unusually hydrophobic heme pocket.
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{{ABSTRACT_PUBMED_2585515}}
==About this Structure==
==About this Structure==
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[[Category: Love, W E.]]
[[Category: Love, W E.]]
[[Category: Oxygen transport]]
[[Category: Oxygen transport]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun May 4 06:05:23 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Jul 29 04:27:42 2008''

Revision as of 01:27, 29 July 2008

Image:2hbg.png

Template:STRUCTURE 2hbg

GLYCERA DIBRANCHIATA HEMOGLOBIN. STRUCTURE AND REFINEMENT AT 1.5 ANGSTROMS RESOLUTION

Template:ABSTRACT PUBMED 2585515

About this Structure

2HBG is a Single protein structure of sequence from Glycera dibranchiata. Full crystallographic information is available from OCA.

Reference

Glycera dibranchiata hemoglobin. Structure and refinement at 1.5 A resolution., Arents G, Love WE, J Mol Biol. 1989 Nov 5;210(1):149-61. PMID:2585515

Page seeded by OCA on Tue Jul 29 04:27:42 2008

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