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7NKZ

Cryo-EM structure of the cytochrome bd oxidase from M. tuberculosis at 2.5 A resolution

Entity
Entity IDChain IDDescriptionTypeChain lengthFormula weightNumber of moleculesDB Name (Accession)Biological sourceDescriptive keywords
1A
(B)
Probable integral membrane cytochrome D ubiquinol oxidase (Subunit II) CydB (Cytochrome BD-I oxidase subunit II)polymer34637651.01UniProt (O06139)
Pfam (PF02322)
Mycobacterium tuberculosis H37Rv
2B
(A)
Probable integral membrane cytochrome D ubiquinol oxidase (Subunit I) CydA (Cytochrome BD-I oxidase subunit I)polymer48553863.11UniProt (L7N662)
Pfam (PF01654)
Mycobacterium tuberculosis H37Rv
3C
(A)
OXYGEN MOLECULEnon-polymer32.01Chemie (OXY)
PubChem (977)
4D
(A)
MENAQUINONE-9non-polymer785.21Chemie (MQ9)
PubChem (5288844)
PubChem (6289935)
PubChem (160508)
PubChem (163285556)
5E
(A)
CIS-HEME D HYDROXYCHLORIN GAMMA-SPIROLACTONEnon-polymer632.51Chemie (HDD)
6F, G
(A)
HEME B/Cnon-polymer618.52Chemie (HEB)
7H, I
(B, A)
waterwater18.042Chemie (HOH)
Sequence viewer
Contents of the asymmetric unit
PolymersNumber of chains2
Total formula weight91514.1
Non-Polymers*Number of molecules5
Total formula weight2686.7
All*Total formula weight94200.8
*Water molecules are not included.

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PDB entries from 2026-04-01

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