This old version of Proteopedia is provided for student assignments while the new version is undergoing repairs. Content and edits done in this old version of Proteopedia after March 1, 2026 will eventually be lost when it is retired in about June of 2026.

Apply for new accounts at the new Proteopedia. Your logins will work in both the old and new versions.

1f25

From Proteopedia

(Difference between revisions)

Jump to: navigation, search

Revision as of 06:17, 10 November 2021

CRYSTAL STRUCTURE OF NO COMPLEX OF THR243ASN MUTANTS OF CYTOCHROME P450NOR

Structural highlights

1f25 is a 1 chain structure with sequence from Cbs 144134. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	, ,
Related:	1f24, 1f26
Activity:	Nitric-oxide reductase (cytochrome c), with EC number 1.7.2.5
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[NOR_FUSOX] Nitric oxide reductase which is involved in a dissimilatory reduction of nitrite. Acts as a nitric oxide reductase. Is able to reduce nitrate and nitrite to a gaseous form of N(2)O when oxygen supply is limited or discontinued. May function as a detoxification mechanism.^[1] ^[2]

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

Publication Abstract from PubMed

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.

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^[3]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Shoun H, Tanimoto T. Denitrification by the fungus Fusarium oxysporum and involvement of cytochrome P-450 in the respiratory nitrite reduction. J Biol Chem. 1991 Jun 15;266(17):11078-82. PMID:2040619
↑ Zhang L, Kudo T, Takaya N, Shoun H. The B' helix determines cytochrome P450nor specificity for the electron donors NADH and NADPH. J Biol Chem. 2002 Sep 13;277(37):33842-7. Epub 2002 Jul 8. PMID:12105197 doi:http://dx.doi.org/10.1074/jbc.M203923200
↑ Obayashi E, Shimizu H, Park SY, Shoun H, Shiro Y. Mutation effects of a conserved threonine (Thr243) of cytochrome P450nor on its structure and function. J Inorg Biochem. 2000 Nov;82(1-4):103-11. PMID:11132616

1 Structural highlights
2 Function
3 Evolutionary Conservation
4 Publication Abstract from PubMed
5 See Also
6 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/1f25"

@@ Line 3: / Line 3: @@
 <StructureSection load='1f25' size='340' side='right'caption='[[1f25]], [[Resolution|resolution]] 1.40&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[1f25]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Fusox Fusox]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1F25 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1F25 FirstGlance]. <br>
+<table><tr><td colspan='2'>[[1f25]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Cbs_144134 Cbs 144134]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1F25 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1F25 FirstGlance]. <br>
 </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=HEM:PROTOPORPHYRIN+IX+CONTAINING+FE'>HEM</scene>, <scene name='pdbligand=NO:NITRIC+OXIDE'>NO</scene></td></tr>
 <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat"><div style='overflow: auto; max-height: 3em;'>[[1f24|1f24]], [[1f26|1f26]]</div></td></tr>
@@ Line 37: / Line 37: @@
 __TOC__
 </StructureSection>
-[[Category: Fusox]]
+[[Category: Cbs 144134]]
 [[Category: Large Structures]]
 [[Category: Park, S Y]]

1f25

From Proteopedia

Revision as of 06:17, 10 November 2021

CRYSTAL STRUCTURE OF NO COMPLEX OF THR243ASN MUTANTS OF CYTOCHROME P450NOR

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

Personal tools

Navigation

Search

Toolbox