1rtx
From Proteopedia
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|PDB= 1rtx |SIZE=350|CAPTION= <scene name='initialview01'>1rtx</scene>, resolution 1.80Å | |PDB= 1rtx |SIZE=350|CAPTION= <scene name='initialview01'>1rtx</scene>, resolution 1.80Å | ||
|SITE= | |SITE= | ||
| - | |LIGAND= <scene name='pdbligand=CD:CADMIUM+ION'>CD</scene>, <scene name='pdbligand= | + | |LIGAND= <scene name='pdbligand=CD:CADMIUM+ION'>CD</scene>, <scene name='pdbligand=HEM:PROTOPORPHYRIN+IX+CONTAINING+FE'>HEM</scene>, <scene name='pdbligand=K:POTASSIUM+ION'>K</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene> |
|ACTIVITY= | |ACTIVITY= | ||
|GENE= GLBN, SLR2097 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=1143 Synechocystis sp.]) | |GENE= GLBN, SLR2097 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=1143 Synechocystis sp.]) | ||
| + | |DOMAIN= | ||
| + | |RELATEDENTRY= | ||
| + | |RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1rtx FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1rtx OCA], [http://www.ebi.ac.uk/pdbsum/1rtx PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1rtx RCSB]</span> | ||
}} | }} | ||
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[[Category: Ramaswamy, S.]] | [[Category: Ramaswamy, S.]] | ||
[[Category: Trent, J T.]] | [[Category: Trent, J T.]] | ||
| - | [[Category: CD]] | ||
| - | [[Category: HEM]] | ||
| - | [[Category: K]] | ||
| - | [[Category: SO4]] | ||
[[Category: crystal structure]] | [[Category: crystal structure]] | ||
[[Category: hemichrome]] | [[Category: hemichrome]] | ||
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[[Category: truncated]] | [[Category: truncated]] | ||
| - | ''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 23:32:52 2008'' |
Revision as of 20:32, 30 March 2008
| |||||||
| , resolution 1.80Å | |||||||
|---|---|---|---|---|---|---|---|
| Ligands: | , , , | ||||||
| Gene: | GLBN, SLR2097 (Synechocystis sp.) | ||||||
| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
Crystal Structure of Synechocystis Hemoglobin with a Covalent Heme Linkage
Overview
The x-ray crystal structure of Synechocystis hemoglobin has been solved to a resolution of 1.8 A. The conformation of this structure is surprisingly different from that of the previously reported solution structure, probably due in part to a covalent linkage between the heme 2-vinyl and His117 that is present in the crystal structure but not in the structure solved by NMR. Synechocystis hemoglobin is a hexacoordinate hemoglobin in which the heme iron is coordinated by both the proximal and distal histidines. It is also a member of the "truncated hemoglobin" family that is much shorter in primary structure than vertebrate and plant hemoglobins. In contrast to other truncated hemoglobins, the crystal structure of Synechocystis hemoglobin displays no "ligand tunnel" and shows that several important amino acid side chains extrude into the solvent instead of residing inside the heme pocket. The stereochemistry of hexacoordination is compared with other hexacoordinate hemoglobins and cytochromes in an effort to illuminate factors contributing to ligand affinity in hexacoordinate hemoglobins.
About this Structure
1RTX is a Single protein structure of sequence from Synechocystis sp.. Full crystallographic information is available from OCA.
Reference
The crystal structure of Synechocystis hemoglobin with a covalent heme linkage., Hoy JA, Kundu S, Trent JT 3rd, Ramaswamy S, Hargrove MS, J Biol Chem. 2004 Apr 16;279(16):16535-42. Epub 2004 Jan 21. PMID:14736872
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