Structure of PDB 1irc Chain A Binding Site BS02

Receptor Information

>1irc Chain A (length=152) Species: 9755 (Physeter catodon)

VLSEGEWQLVLHVWAKVEADVAGHGQDILIRLFKSHPETLEKFDRFKHLK
TEAEMKASEDLKKHGVTVLTALGAILKKKGHHEAELKPLAQSGATKHKIP
IKYLEFISEAIIHVLHSRHPGDFGADAQGAMNKALELFRKDIAAKYKELG
YQ

Ligand information

• Ligand ID: IMD
• InChI: InChI=1S/C3H4N2/c1-2-5-3-4-1/h1-3H,(H,4,5)/p+1
• InChIKey: RAXXELZNTBOGNW-UHFFFAOYSA-O
• SMILES:
  CACTVS 3.341: [nH]1cc[nH+]c1
  ACDLabs 10.04: c1c[nH+]cn1
  OpenEye OEToolkits 1.5.0: c1c[nH+]c[nH]1
• Formula: C3 H5 N2
• Name: IMIDAZOLE
• PDB chain: 1irc Chain A Residue 155

Receptor-Ligand Complex Structure

Structure summary

• PDB: 1irc Replacement of the proximal ligand of sperm whale myoglobin with free imidazole in the mutant His-93-->Gly.
• Resolution: 2.17 Å
• Binding residue (original residue number in PDB): L89 S92
• Binding residue (residue number reindexed from 1): L89 S92
• Annotation score: 1

Enzymatic activity

• Enzyme Commision number: 1.11.1.-
  1.7.-.-

Gene Ontology

Molecular Function

• GO:0004601 peroxidase activity
• GO:0005344 oxygen carrier activity
• GO:0016491 oxidoreductase activity
• GO:0019825 oxygen binding
• GO:0020037 heme binding
• GO:0046872 metal ion binding
• GO:0098809 nitrite reductase activity

Biological Process

• GO:0015671 oxygen transport
• GO:0019430 removal of superoxide radicals

Cellular Component

• GO:0005737 cytoplasm
• GO:0016528 sarcoplasm
• GO:0070062 extracellular exosome

External links

• PDB: RCSB:1irc, PDBe:1irc, PDBj:1irc
• PDBsum: 1irc
• PubMed: 8204590
• UniProt: P02185|MYG_PHYMC Myoglobin (Gene Name=MB)