30QN | pdb_000030qn

Cryo-EM Structure of Native Monomeric Quinol-Dependent Nitric Oxide Reductase from Achromobacter xylosoxidans.

PDB DOI: https://doi.org/10.2210/pdb30QN/pdb
EM Map EMD-57960: EMDB EMDataResource

Classification: MEMBRANE PROTEIN
Organism(s): Achromobacter xylosoxidans
Expression System: Escherichia coli BL21(DE3)
Mutation(s): No

Deposited: 2026-05-08 Released: 2026-08-26
Deposition Author(s): Khaja, F., Antonyuk, S.V., Muench, S.P., Hasnain, S.S.
Funding Organization(s): Biotechnology and Biological Sciences Research Council (BBSRC)

Experimental Data Snapshot

Method: ELECTRON MICROSCOPY
Resolution: 3.20 Å
Aggregation State: PARTICLE
Reconstruction Method: SINGLE PARTICLE

wwPDB Validation 3D Report Full Report

Validation slider image for 30QN

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

Literature

Cryo-EM Structure of Native Monomeric Quinol-Dependent Nitric Oxide Reductase from Achromobacter xylosoxidans.

Khaja, F., Antonyuk, S.V., Muench, S.P., Hasnain, S.S.

To be published.

Macromolecule Content

Total Structure Weight: 86.12 kDa
Atom Count: 6,004
Modeled Residue Count: 750
Deposited Residue Count: 761
Unique protein chains: 1

Macromolecules

Find similar proteins by:

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Nitric oxide reductase subunit B	A	761	Achromobacter xylosoxidans	Mutation(s): 0 Gene Names: norB_1, ERS451415_02175, IUJ48_17015 EC: 1.7.2.5
UniProt
Find proteins for A0ABF7PH53 (Alcaligenes xylosoxydans xylosoxydans) Explore A0ABF7PH53 Go to UniProtKB: A0ABF7PH53
Entity Groups
Sequence Clusters	30% Identity 50% Identity 70% Identity 90% Identity 95% Identity 100% Identity
UniProt Group	A0ABF7PH53
Sequence Annotations Expand
Reference Sequence

Small Molecules

Ligands 4 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
HEM (Subject of Investigation/LOI) Query on HEM Download:Ideal Coordinates CCD File SDF format, chain D [auth A] SDF format, chain C [auth A] MOL2 format, chain D [auth A] MOL2 format, chain C [auth A] mmCIF format, chain D [auth A] mmCIF format, chain C [auth A]	C [auth A], D [auth A]	PROTOPORPHYRIN IX CONTAINING FE C₃₄ H₃₂ Fe N₄ O₄ KABFMIBPWCXCRK-RGGAHWMASA-L		Interactions Focus chain C [auth A] Focus chain D [auth A] Interactions & Density Focus chain C [auth A] Focus chain D [auth A]
CU Query on CU 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]	COPPER (II) ION Cu JPVYNHNXODAKFH-UHFFFAOYSA-N		Interactions Focus chain E [auth A] Interactions & Density Focus chain E [auth A]
FE Query on FE Download:Ideal Coordinates CCD File SDF format, chain F [auth A] MOL2 format, chain F [auth A] mmCIF format, chain F [auth A]	F [auth A]	FE (III) ION Fe VTLYFUHAOXGGBS-UHFFFAOYSA-N		Interactions Focus chain F [auth A] Interactions & Density Focus chain F [auth A]
CA Query on CA Download:Ideal Coordinates CCD File SDF format, chain B [auth A] MOL2 format, chain B [auth A] mmCIF format, chain B [auth A]	B [auth A]	CALCIUM ION Ca BHPQYMZQTOCNFJ-UHFFFAOYSA-N		Interactions Focus chain B [auth A] Interactions & Density Focus chain B [auth A]

Experimental Data & Validation

Experimental Data

Method: ELECTRON MICROSCOPY
Resolution: 3.20 Å
Aggregation State: PARTICLE
Reconstruction Method: SINGLE PARTICLE

EM Software:

Task	Software Package	Version
MODEL REFINEMENT	PHENIX	1.21.1_5286
RECONSTRUCTION	cryoSPARC

Structure Validation

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View more in-depth experimental data

Entry History

& Funding Information

Deposition Data

Released Date: 2026-08-26

Deposition Author(s):

Funding Organization	Location	Grant Number
Biotechnology and Biological Sciences Research Council (BBSRC)	United Kingdom	BB/X015491/1

Revision History (Full details and data files)

Version 1.0: 2026-08-26
Type: Initial release

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RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.