1f25: Difference between revisions
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[[Image:1f25.gif|left|200px]] | [[Image:1f25.gif|left|200px]] | ||
'''CRYSTAL STRUCTURE OF NO COMPLEX OF THR243ASN MUTANTS OF CYTOCHROME P450NOR''' | {{Structure | ||
|PDB= 1f25 |SIZE=350|CAPTION= <scene name='initialview01'>1f25</scene>, resolution 1.4Å | |||
|SITE= | |||
|LIGAND= <scene name='pdbligand=HEM:PROTOPORPHYRIN+IX+CONTAINING+FE'>HEM</scene>, <scene name='pdbligand=NO:NITROGEN+OXIDE'>NO</scene> and <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene> | |||
|ACTIVITY= [http://en.wikipedia.org/wiki/Nitric-oxide_reductase Nitric-oxide reductase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.7.99.7 1.7.99.7] | |||
|GENE= | |||
}} | |||
'''CRYSTAL STRUCTURE OF NO COMPLEX OF THR243ASN MUTANTS OF CYTOCHROME P450NOR''' | |||
==Overview== | ==Overview== | ||
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==About this Structure== | ==About this Structure== | ||
1F25 is a [ | 1F25 is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Fusarium_oxysporum Fusarium oxysporum]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1F25 OCA]. | ||
==Reference== | ==Reference== | ||
Mutation effects of a conserved threonine (Thr243) of cytochrome P450nor on its structure and function., Obayashi E, Shimizu H, Park SY, Shoun H, Shiro Y, J Inorg Biochem. 2000 Nov;82(1-4):103-11. PMID:[http:// | Mutation effects of a conserved threonine (Thr243) of cytochrome P450nor on its structure and function., Obayashi E, Shimizu H, Park SY, Shoun H, Shiro Y, J Inorg Biochem. 2000 Nov;82(1-4):103-11. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/11132616 11132616] | ||
[[Category: Fusarium oxysporum]] | [[Category: Fusarium oxysporum]] | ||
[[Category: Nitric-oxide reductase]] | [[Category: Nitric-oxide reductase]] | ||
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[[Category: nitric oxide reductase]] | [[Category: nitric oxide reductase]] | ||
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 11:03:21 2008'' | ||
Revision as of 12:03, 20 March 2008
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| , resolution 1.4Å | |||||||
|---|---|---|---|---|---|---|---|
| Ligands: | , and | ||||||
| Activity: | Nitric-oxide reductase, with EC number 1.7.99.7 | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
CRYSTAL STRUCTURE OF NO COMPLEX OF THR243ASN MUTANTS OF CYTOCHROME P450NOR
OverviewOverview
Threonine 243 of cytochrome P450nor (fungal nitric oxide reductase) corresponds to the 'conserved' Thr in the long I helix of monooxygenase cytochrome P450s. In P450nor, the replacement of Thr243 with Asn, Ala or Val makes the enzymatic activity dramatically reduce. In order to understand the roles of Thr243 in the reduction reaction of NO by P450nor, the crystal structures of three Thr243 mutants (Thr243-->Asn, Thr243-->Val, Thr243-->Ala) of P450nor were determined at a 1.4-A resolution and at cryogenic temperature. However, the hydrogen-bonding pattern in the heme pocket of these mutants is essentially similar for that of the WT enzyme. This suggests that the determination of the structure of the NADH complex of P450nor is required, in order to evaluate the role of Thr243 in its enzymatic reaction. We attempted to crystallize the NADH complex under several conditions, but have not yet been successful.
About this StructureAbout this Structure
1F25 is a Single protein structure of sequence from Fusarium oxysporum. Full crystallographic information is available from OCA.
ReferenceReference
Mutation effects of a conserved threonine (Thr243) of cytochrome P450nor on its structure and function., Obayashi E, Shimizu H, Park SY, Shoun H, Shiro Y, J Inorg Biochem. 2000 Nov;82(1-4):103-11. PMID:11132616
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