Structure of PDB 2bq4 Chain B

Receptor sequence

>2bq4B (length=115) Species: 873 (Desulfocurvibacter africanus)

PQVPADVVIDHLSNPNAKLEYKVKFSHKAHASLGTDAAACQKCHHKWDGK
SEIGGCATEGCHADTTSFKATEKDPKFLMTAFHSKSPMSCQGCHKEMKTA
KKTTGPTACAQCHNQ

3D structure

• PDB: 2bq4 The Type I / Type II Cytochrome C(3) Complex: An Electron Transfer Link in the Hydrogen-Sulfate Reduction Pathway.
• Chain: B
• Resolution: 1.68 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	HEC	B	Q2 H11 F25 H27 H30 C40 C43 H44 I53 G54 G55	Q2 H11 F25 H27 H30 C40 C43 H44 I53 G54 G55
BS02	HEC	B	C43 H45 K46 C56 C61 H62 P75 A81 S84 S86 M88 S89	C43 H45 K46 C56 C61 H62 P75 A81 S84 S86 M88 S89
BS03	HEC	B	F25 A29 H30 S32 L33 C90 C93 H94 M97 T104 G105 P106 Q115	F25 A29 H30 S32 L33 C90 C93 H94 M97 T104 G105 P106 Q115
BS04	HEC	B	I9 D10 H11 L12 N14 E20 Y21 V23 F68 A70 M79 F82 H83 C90 Q91 H94 T107 C109 C112 H113	I9 D10 H11 L12 N14 E20 Y21 V23 F68 A70 M79 F82 H83 C90 Q91 H94 T107 C109 C112 H113
BS05	CA	B	D10 L12 E20 Y21	D10 L12 E20 Y21

Gene Ontology

Molecular Function

• GO:0009055 electron transfer activity
• GO:0020037 heme binding
• GO:0046872 metal ion binding

Biological Process

• GO:0009061 anaerobic respiration

Cellular Component

• GO:0042597 periplasmic space

External links

• PDB: RCSB:2bq4, PDBe:2bq4, PDBj:2bq4
• PDBsum: 2bq4
• PubMed: 16226767
• UniProt: P94691|CYC3B_DESAF Basic cytochrome c3