2nox
From Proteopedia
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|PDB= 2nox |SIZE=350|CAPTION= <scene name='initialview01'>2nox</scene>, resolution 2.400Å | |PDB= 2nox |SIZE=350|CAPTION= <scene name='initialview01'>2nox</scene>, resolution 2.400Å | ||
|SITE= | |SITE= | ||
| - | |LIGAND= <scene name='pdbligand=HEM:PROTOPORPHYRIN IX CONTAINING FE'>HEM</scene> | + | |LIGAND= <scene name='pdbligand=HEM:PROTOPORPHYRIN+IX+CONTAINING+FE'>HEM</scene> |
| - | |ACTIVITY= [http://en.wikipedia.org/wiki/Tryptophan_2,3-dioxygenase Tryptophan 2,3-dioxygenase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.13.11.11 1.13.11.11] | + | |ACTIVITY= <span class='plainlinks'>[http://en.wikipedia.org/wiki/Tryptophan_2,3-dioxygenase Tryptophan 2,3-dioxygenase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.13.11.11 1.13.11.11] </span> |
|GENE= | |GENE= | ||
| + | |DOMAIN= | ||
| + | |RELATEDENTRY= | ||
| + | |RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2nox FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2nox OCA], [http://www.ebi.ac.uk/pdbsum/2nox PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=2nox RCSB]</span> | ||
}} | }} | ||
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[[Category: Mukherjee, T.]] | [[Category: Mukherjee, T.]] | ||
[[Category: Zhang, Y.]] | [[Category: Zhang, Y.]] | ||
| - | [[Category: HEM]] | ||
[[Category: helical bundle]] | [[Category: helical bundle]] | ||
[[Category: heme protein]] | [[Category: heme protein]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Mar 31 04:06:11 2008'' |
Revision as of 01:06, 31 March 2008
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| , resolution 2.400Å | |||||||
|---|---|---|---|---|---|---|---|
| Ligands: | |||||||
| Activity: | Tryptophan 2,3-dioxygenase, with EC number 1.13.11.11 | ||||||
| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
Crystal structure of tryptophan 2,3-dioxygenase from Ralstonia metallidurans
Overview
The structure of tryptophan 2,3-dioxygenase (TDO) from Ralstonia metallidurans was determined at 2.4 A. TDO catalyzes the irreversible oxidation of l-tryptophan to N-formyl kynurenine, which is the initial step in tryptophan catabolism. TDO is a heme-containing enzyme and is highly specific for its substrate l-tryptophan. The structure is a tetramer with a heme cofactor bound at each active site. The monomeric fold, as well as the heme binding site, is similar to that of the large domain of indoleamine 2,3-dioxygenase, an enzyme that catalyzes the same reaction except with a broader substrate tolerance. Modeling of the putative (S)-tryptophan hydroperoxide intermediate into the active site, as well as substrate analogue and mutagenesis studies, are consistent with a Criegee mechanism for the reaction.
About this Structure
2NOX is a Single protein structure of sequence from Cupriavidus metallidurans. Full crystallographic information is available from OCA.
Reference
Crystal structure and mechanism of tryptophan 2,3-dioxygenase, a heme enzyme involved in tryptophan catabolism and in quinolinate biosynthesis., Zhang Y, Kang SA, Mukherjee T, Bale S, Crane BR, Begley TP, Ealick SE, Biochemistry. 2007 Jan 9;46(1):145-55. PMID:17198384
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