Structure of PDB 1aqe Chain A

Receptor sequence

>1aqeA (length=110) Species: 52561 (Desulfomicrobium norvegicum)

TFEIPESVTMSPKQFEGYTPKKGDVTFNHASHMDIACQQCHHTVPDTYTI
ESCMTEGCHDNIKERTEISSVERTFHTTKDSEKSCVGCHRELKRQGPSDA
PLACNSCHVQ

3D structure

• PDB: 1aqe Structural and kinetic studies of the Y73E mutant of octaheme cytochrome c3 (Mr = 26 000) from Desulfovibrio desulfuricans Norway.
• Chain: A
• Resolution: 2.2 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	A	F3 I5 P6 M11 F28 H30 H33 I36 C38 C41 H42 I51 S53	F2 I4 P5 M10 F27 H29 H32 I35 C37 C40 H41 I50 S52
BS02	HEM	A	C41 H42 H43 T44 C54 C59 H60 I69 R74 T75 K84	C40 H41 H42 T43 C53 C58 H59 I68 R73 T74 K83
BS03	HEM	A	S32 H33 I36 E83 K84 C86 C89 H90 P102	S31 H32 I35 E82 K83 C85 C88 H89 P101
BS04	HEM	A	M11 P13 Y19 K22 K23 V26 E73 F76 H77 C86 H90 L103 C105 C108 H109	M10 P12 Y18 K21 K22 V25 E72 F75 H76 C85 H89 L102 C104 C107 H108

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:1aqe, PDBe:1aqe, PDBj:1aqe
• PDBsum: 1aqe
• PubMed: 9485359
• UniProt: P38554|CYC32_DESNO Cytochrome c3, 26 kDa