Structure of PDB 2ri4 Chain I

Receptor sequence

>2ri4I (length=137) Species: 9925 (Capra hircus)

VLSAADKSNVKAAWGKVGGNAGAYGAEALERMFLSFPTTKTYFPHFDLSH
GSAQVKGHGEKVAAALTKAVGHLDDLPGTLSDLSDLHAKLRVDPVNFKLL
SHSLLVTLACHLPNDFTPAVHASLDKFLANVSTVLTS

3D structure

• PDB: 2ri4 Crystallization of sheep (Ovis aries) and goat (Capra hircus) haemoglobins under unbuffered low-salt conditions
• Chain: I
• Resolution: 2.7 Å

Interaction with ligand

Site #	Ligand	Ligand chain	Binding residues on receptor (original residue number in PDB)	Binding residues on receptor (residue number reindexed from 1)	Binding affinity
BS01	HEM	I	Y42 F43 H45 H58 L66 L83 L86 H87 L91 V93 N97 F98 L101 L136	Y42 F43 H45 H58 L66 L83 L86 H87 L90 V92 N96 F97 L100 L135

Gene Ontology

Molecular Function

• GO:0004601 peroxidase activity
• GO:0005344 oxygen carrier activity
• GO:0005506 iron ion binding
• GO:0019825 oxygen binding
• GO:0020037 heme binding
• GO:0031720 haptoglobin binding
• GO:0043177 organic acid binding
• GO:0046872 metal ion binding

Biological Process

• GO:0015671 oxygen transport
• GO:0042744 hydrogen peroxide catabolic process
• GO:0098869 cellular oxidant detoxification

Cellular Component

• GO:0005833 hemoglobin complex
• GO:0031838 haptoglobin-hemoglobin complex
• GO:0072562 blood microparticle

External links

• PDB: RCSB:2ri4, PDBe:2ri4, PDBj:2ri4
• PDBsum: 2ri4
• UniProt: P0CH25|HBA1_CAPHI Hemoglobin subunit alpha-1 (Gene Name=HBA1)