Structure of PDB 1sqb Chain C Binding Site BS01

Receptor Information
>1sqb Chain C (length=378) Species: 9913 (Bos taurus) [Search protein sequence] [Download receptor structure] [Download structure with residue number starting from 1] [View receptor structure]
TNIRKSHPLMKIVNNAFIDLPAPSNISSWWNFGSLLGICLILQILTGLFL
AMHYTSDTTTAFSSVTHICRDVNYGWIIRYMHANGASMFFICLYMHVGRG
LYYGSYTFLETWNIGVILLLTVMATAFMGYVLPWGQMSFWGATVITNLLS
AIPYIGTNLVEWIWGGFSVDKATLTRFFAFHFILPFIIMAIAMVHLLFLH
ETGSNNPTGISSDVDKIPFHPYYTIKDILGALLLILALMLLVLFAPDLLG
DPDNYTPANPLNTPPHIKPEWYFLFAYAILRSIPNKLGGVLALAFSILIL
ALIPLLHTSKQRSMMFRPLSQCLFWALVADLLTLTWIGGQPVEHPYITIG
QLASVLYFLLILVLMPTAGTIENKLLKW
Ligand information
Ligand IDHEM
InChIInChI=1S/C34H34N4O4.Fe/c1-7-21-17(3)25-13-26-19(5)23(9-11-33(39)40)31(37-26)16-32-24(10-12-34(41)42)20(6)28(38-32)15-30-22(8-2)18(4)27(36-30)14-29(21)35-25;/h7-8,13-16H,1-2,9-12H2,3-6H3,(H4,35,36,37,38,39,40,41,42);/q;+2/p-2/b25-13-,26-13-,27-14-,28-15-,29-14-,30-15-,31-16-,32-16-;
InChIKeyKABFMIBPWCXCRK-RGGAHWMASA-L
SMILES
SoftwareSMILES
OpenEye OEToolkits 1.7.6Cc1c2n3c(c1CCC(=O)O)C=C4C(=C(C5=[N]4[Fe]36[N]7=C(C=C8N6C(=C5)C(=C8C)C=C)C(=C(C7=C2)C)C=C)C)CCC(=O)O
CACTVS 3.385CC1=C(CCC(O)=O)C2=Cc3n4[Fe]5|6|N2=C1C=c7n5c(=CC8=N|6C(=Cc4c(C)c3CCC(O)=O)C(=C8C=C)C)c(C)c7C=C
ACDLabs 12.01C=1c3c(c(c4C=C5C(=C(C=6C=C7C(=C(C8=CC=2C(=C(C=1N=2[Fe](n34)(N5=6)N78)CCC(=O)O)C)\C=C)C)\C=C)C)C)CCC(=O)O
FormulaC34 H32 Fe N4 O4
NamePROTOPORPHYRIN IX CONTAINING FE;
HEME
ChEMBL
DrugBankDB18267
ZINC
PDB chain1sqb Chain C Residue 381 [Download ligand structure] [Download structure with residue number starting from 1] [View ligand structure]
Receptor-Ligand Complex Structure
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PDB1sqb Crystallographic studies of quinol oxidation site inhibitors: a modified classification of inhibitors for the cytochrome bc(1) complex
Resolution2.69 Å
Binding residue
(original residue number in PDB)		W31 G34 L37 H97 V98 R100 S106 W113 G116 V117 L119 H196 L200 S205 N206
Binding residue
(residue number reindexed from 1)		W30 G33 L36 H96 V97 R99 S105 W112 G115 V116 L118 H195 L199 S204 N205
Annotation score1
Enzymatic activity
Catalytic site (original residue number in PDB) H201 S205 K227 D228 E271
Catalytic site (residue number reindexed from 1) H200 S204 K226 D227 E270
Enzyme Commision number 1.10.2.2: Transferred entry: 7.1.1.8.
Gene Ontology
Molecular Function
GO:0008121 ubiquinol-cytochrome-c reductase activity
GO:0009055 electron transfer activity
GO:0016491 oxidoreductase activity
GO:0020037 heme binding
GO:0046872 metal ion binding
GO:0048039 ubiquinone binding
Biological Process
GO:0006122 mitochondrial electron transport, ubiquinol to cytochrome c
GO:0022904 respiratory electron transport chain
GO:1902600 proton transmembrane transport
Cellular Component
GO:0005739 mitochondrion
GO:0005743 mitochondrial inner membrane
GO:0016020 membrane
GO:0031966 mitochondrial membrane
GO:0045275 respiratory chain complex III

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Molecular Function
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Biological Process
View graph for
Cellular Component
External links
PDB RCSB:1sqb, PDBe:1sqb, PDBj:1sqb
PDBsum1sqb
PubMed15312779
UniProtP00157|CYB_BOVIN Cytochrome b (Gene Name=MT-CYB)

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