1QX4	Oxidoreductase	date	Sep 04, 2003
title	Structrue Of S127p Mutant Of Cytochrome B5 Reductase
authors	M.C.Bewley, C.A.Davis, C.C.Marohnic, D.Taormina, M.J.Barber
compound		source
Molecule: Nadh-Cytochrome B5 Reductase Chain: A, B Ec: 1.6.2.2 Engineered: Yes Mutation: Yes		Organism_scientific: Rattus Norvegicus Organism_common: Norway Rat Organism_taxid: 10116 Gene: Dia1 Expression_system: Escherichia Coli Expression_system_taxid: 562 Expression_system_strain: Bl21-Codon-Plus (De3)Ril
symmetry	Space Group: P 1 21 1	R_factor 0.207 R_Free 0.241
crystal cell	length a length b length c angle alpha angle beta angle gamma 77.236 48.004 77.247 90.00 107.69 90.00
method	X-Ray Diffraction	resolution	1.80 Å
ligand	FAD	enzyme	Oxidoreductase E.C.1.6.2.2 BRENDA
related structures	by homologous chain: 1I7P, 1UMK
Gene Ontology	Chain Function Process Component A, B
Primary reference	The structure of the S127P mutant of cytochrome b5 reductase that causes methemoglobinemia shows the AMP moiety of the flavin occupying the substrate binding site., Bewley MC, Davis CA, Marohnic CC, Taormina D, Barber MJ, Biochemistry 2003 Nov 18;42(45):13145-51. PMID:14609324

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (94 Kb) [Save to disk] Biological Unit Coordinates (1qx4.pdb1.gz) 90 Kb LPC: Ligand-Protein Contacts for 1QX4 CSU: Contacts of Structural Units for 1QX4 Likely Quarternary Molecular Structure file(s) for 1QX4 Retrieve 1QX4 in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 1QX4 from S2C, [Save to disk]

View 1QX4 in 3D

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Visual 3D analysis of 1QX4

Ramachandran plot from PDBSum

Structure-derived information

Dipole moment, from Dipole Server at Weizmann Institute 3D motif for 1QX4, from MSDmotif at EBI Classification of representative domains in scop (Structural Classification of Proteins)     - Domain d1qx4a2, region A:154-300 [Jmol] [rasmolscript] [script source]     - Domain d1qx4a1, region A:33-153 [Jmol] [rasmolscript] [script source]     - Domain d1qx4b2, region B:154-300 [Jmol] [rasmolscript] [script source]     - Domain d1qx4b1, region B:33-153 [Jmol] [rasmolscript] [script source] Class (fold), Architecture (subfold), Topology, Homologous superfamily from CATH Summaries and structural analyses of PDB data files from PDBSum Identification of Protein Pockets & Cavities at CASTp

Sequence-derived information

View one-letter amino acid or nucleotide sequence for each chain: [1qx4] [1qx4_A] [1qx4_B] SWISS-PROT database: [P20070] Domain organization of [NB5R3_RAT] by SWISSPFAM

Other resources with information on 1QX4

Community annotation for 1QX4 at PDBWiki (http://pdbwiki.org) MMDB (Entrez's Structure Database)

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