9SFH | pdb_00009sfh

E.coli cytochrome bd-I monomer

PDB DOI: https://doi.org/10.2210/pdb9SFH/pdb
EM Map EMD-54823: EMDB EMDataResource

Classification: OXIDOREDUCTASE
Organism(s): Escherichia coli K-12
Expression System: Escherichia coli
Mutation(s): No

Deposited: 2025-08-19 Released: 2026-04-22
Deposition Author(s): van der Velden, T.T., Kaystha, K., Bruenle, S., Jeuken, L.J.C.
Funding Organization(s): Other government

Experimental Data Snapshot

Method: ELECTRON MICROSCOPY
Resolution: 2.49 Å
Aggregation State: PARTICLE
Reconstruction Method: SINGLE PARTICLE

wwPDB Validation 3D Report Full Report

This is version 1.0 of the entry. See complete history.

Literature

Molecular basis of quinol turnover and inhibition of a bd-type oxidase

van der Velden, T.T., Kaystha, K., Pelser, F., Bruenle, S., Jeuken, L.J.C.

To be published.

Macromolecule Content

Total Structure Weight: 111.7 kDa
Atom Count: 7,349
Modeled Residue Count: 894
Deposited Residue Count: 967
Unique protein chains: 4

Macromolecules

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| 3D Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Cytochrome bd-I ubiquinol oxidase subunit 1	A	522	Escherichia coli K-12	Mutation(s): 0 Gene Names: cydA, cyd-1, b0733, JW0722 EC: 7.1.1.7
UniProt
Find proteins for P0ABJ9 (Escherichia coli (strain K12)) Explore P0ABJ9 Go to UniProtKB: P0ABJ9
Entity Groups
Sequence Clusters	30% Identity 50% Identity 70% Identity 90% Identity 95% Identity 100% Identity
UniProt Group	P0ABJ9
Sequence Annotations Expand
Reference Sequence

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| 3D Structure

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Cytochrome bd-I ubiquinol oxidase subunit 2	B	379	Escherichia coli K-12	Mutation(s): 0 Gene Names: cydB, cyd-2, b0734, JW0723 EC: 7.1.1.7
UniProt
Find proteins for P0ABK2 (Escherichia coli (strain K12)) Explore P0ABK2 Go to UniProtKB: P0ABK2
Entity Groups
Sequence Clusters	30% Identity 50% Identity 70% Identity 90% Identity 95% Identity 100% Identity
UniProt Group	P0ABK2
Sequence Annotations Expand
Reference Sequence

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| 3D Structure

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
Cytochrome bd-I ubiquinol oxidase CydH (Uncharacterized protein YnhF)	C [auth H]	29	Escherichia coli K-12	Mutation(s): 0 Gene Names: ynhF, b4602, JW1649.1
UniProt
Find proteins for A5A618 (Escherichia coli (strain K12)) Explore A5A618 Go to UniProtKB: A5A618
Entity Groups
Sequence Clusters	30% Identity 50% Identity 70% Identity 90% Identity 95% Identity 100% Identity
UniProt Group	A5A618
Sequence Annotations Expand
Reference Sequence

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| 3D Structure

Entity ID: 4
Molecule	Chains	Sequence Length	Organism	Details	Image
Cytochrome bd-I ubiquinol oxidase subunit X	D [auth X]	37	Escherichia coli K-12	Mutation(s): 0 Gene Names: cydX, ybgT, b4515, JW0724 EC: 7.1.1.7
UniProt
Find proteins for P56100 (Escherichia coli (strain K12)) Explore P56100 Go to UniProtKB: P56100
Entity Groups
Sequence Clusters	30% Identity 50% Identity 70% Identity 90% Identity 95% Identity 100% Identity
UniProt Group	P56100
Sequence Annotations Expand
Reference Sequence

Small Molecules

Ligands 5 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
UQ8 Query on UQ8 Download:Ideal Coordinates CCD File SDF format, chain K [auth B] MOL2 format, chain K [auth B] mmCIF format, chain K [auth B]	K [auth B]	Ubiquinone-8 C₄₉ H₇₄ O₄ ICFIZJQGJAJRSU-SGHXUWJISA-N		Interactions Focus chain K [auth B] Interactions & Density Focus chain K [auth B]
LPP Query on LPP Download:Ideal Coordinates CCD File SDF format, chain H [auth A] SDF format, chain J [auth B] MOL2 format, chain H [auth A] MOL2 format, chain J [auth B] mmCIF format, chain H [auth A] mmCIF format, chain J [auth B]	H [auth A], J [auth B]	2-(HEXADECANOYLOXY)-1-[(PHOSPHONOOXY)METHYL]ETHYL HEXADECANOATE C₃₅ H₆₉ O₈ P PORPENFLTBBHSG-MGBGTMOVSA-N		Interactions Focus chain H [auth A] Focus chain J [auth B] Interactions & Density Focus chain H [auth A] Focus chain J [auth B]
A1JN4 Query on A1JN4 Download:Ideal Coordinates CCD File SDF format, chain E [auth A] MOL2 format, chain E [auth A] mmCIF format, chain E [auth A]	E [auth A]	TRANS-HEME D HYDROXYCHLORIN GAMMA-SPIROLACTONE C₃₄ H₃₆ Fe N₄ O₅ FGTYSKQEPKRAII-JHWOAODTSA-N		Interactions Focus chain E [auth A] Interactions & Density Focus chain E [auth A]
HEM Query on HEM Download:Ideal Coordinates CCD File SDF format, chain F [auth A] SDF format, chain G [auth A] MOL2 format, chain F [auth A] MOL2 format, chain G [auth A] mmCIF format, chain F [auth A] mmCIF format, chain G [auth A]	F [auth A], G [auth A]	PROTOPORPHYRIN IX CONTAINING FE C₃₄ H₃₂ Fe N₄ O₄ KABFMIBPWCXCRK-RGGAHWMASA-L		Interactions Focus chain F [auth A] Focus chain G [auth A] Interactions & Density Focus chain F [auth A] Focus chain G [auth A]
OXY Query on OXY Download:Ideal Coordinates CCD File SDF format, chain I [auth A] MOL2 format, chain I [auth A] mmCIF format, chain I [auth A]	I [auth A]	OXYGEN MOLECULE O₂ MYMOFIZGZYHOMD-UHFFFAOYSA-N		Interactions Focus chain I [auth A] Interactions & Density Focus chain I [auth A]