1jl7: Difference between revisions
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'''Crystal Structure Of CN-Ligated Component III Glycera Dibranchiata Monomeric Hemoglobin'''<br /> | '''Crystal Structure Of CN-Ligated Component III Glycera Dibranchiata Monomeric Hemoglobin'''<br /> | ||
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==About this Structure== | ==About this Structure== | ||
1JL7 is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Glycera_dibranchiata Glycera dibranchiata] with CYN and HEM as [http://en.wikipedia.org/wiki/ligands ligands]. Full crystallographic information is available from [http:// | 1JL7 is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Glycera_dibranchiata Glycera dibranchiata] with <scene name='pdbligand=CYN:'>CYN</scene> and <scene name='pdbligand=HEM:'>HEM</scene> as [http://en.wikipedia.org/wiki/ligands ligands]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1JL7 OCA]. | ||
==Reference== | ==Reference== | ||
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[[Category: monomer hemoglobin]] | [[Category: monomer hemoglobin]] | ||
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Revision as of 17:08, 15 February 2008
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Crystal Structure Of CN-Ligated Component III Glycera Dibranchiata Monomeric Hemoglobin
OverviewOverview
Erythrocytes of the marine annelid, Glycera dibranchiata, contain a, mixture of monomeric and polymeric hemoglobins. There are three major, monomer hemoglobin components, II, III, IV (also called GMH2, 3, and 4), that have been highly purified and well characterized. We have now, crystallized GMH3 and GMH4 and determined their structures to 1.4-1.8 A, resolution. The structures were determined for these two monomer, hemoglobins in the oxidized (Fe3+, ferric, or met-) forms in both the, unligated and cyanide-ligated states. This work differs from two, published, refined structures of a Glycera dibranchiata monomer, hemoglobin, which has a sequence that is substantially different from any, bona fide major monomer hemoglobins (GMH2, 3, or 4). The high-resolution, crystal structures (presented here) and the previous NMR structure of, CO-ligated GMH4, provide a basis for interpreting structure/function, details of the monomer hemoglobins. These details include: (1) the strong, correlation between temperature factor and NMR dynamics for respective, protein forms; (2) the unique nature of the HisE7Leu primary sequence, substitutions in GMH3 and GMH4 and their impact on cyanide ion binding, kinetics; (3) the LeuB10Phe difference between GMH3 and GMH4 and its, impact on ligand binding; and (4) elucidation of changes in the structural, details of the distal and proximal heme pockets upon cyanide binding.
About this StructureAbout this Structure
1JL7 is a Single protein structure of sequence from Glycera dibranchiata with and as ligands. Full crystallographic information is available from OCA.
ReferenceReference
Crystal structures of unligated and CN-ligated Glycera dibranchiata monomer ferric hemoglobin components III and IV., Park HJ, Yang C, Treff N, Satterlee JD, Kang C, Proteins. 2002 Oct 1;49(1):49-60. PMID:12211015
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