8GZ3 image
Deposition Date 2022-09-24
Release Date 2022-12-21
Last Version Date 2024-10-16
Entry Detail
PDB ID:
8GZ3
Keywords:
Title:
Structure of human phagocyte NADPH oxidase in the resting state
Biological Source:
Source Organism:
Homo sapiens (Taxon ID: 9606)
Vicugna pacos (Taxon ID: 30538)
Mus musculus (Taxon ID: 10090)
Host Organism:
Method Details:
Experimental Method:
Resolution:
3.30 Å
Aggregation State:
PARTICLE
Reconstruction Method:
SINGLE PARTICLE
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:Cytochrome b-245 light chain
Gene (Uniprot):CYBA
Chain IDs:A
Chain Length:195
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Molecule:Cytochrome b-245 heavy chain
Gene (Uniprot):CYBB
Chain IDs:B
Chain Length:570
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Molecule:7D5 Fab heavy chain
Chain IDs:D (auth: H)
Chain Length:215
Number of Molecules:1
Biological Source:Mus musculus
Polymer Type:polypeptide(L)
Molecule:7D5 Fab light chain
Chain IDs:C (auth: L)
Chain Length:211
Number of Molecules:1
Biological Source:Mus musculus
Polymer Type:polypeptide(L)
Molecule:Green Fluorescent Protein, Anti-Fab (kappa) nanobody[TP1170] chimera
Chain IDs:E (auth: N)
Chain Length:414
Number of Molecules:1
Biological Source:Vicugna pacos
Primary Citation
Structure of human phagocyte NADPH oxidase in the resting state.
Elife 11 ? ? (2022)
PMID: 36413210 DOI: 10.7554/eLife.83743

Abstact

Phagocyte oxidase plays an essential role in the first line of host defense against pathogens. It oxidizes intracellular NADPH to reduce extracellular oxygen to produce superoxide anions that participate in pathogen killing. The resting phagocyte oxidase is a heterodimeric complex formed by two transmembrane proteins NOX2 and p22. Despite the physiological importance of this complex, its structure remains elusive. Here, we reported the cryo-EM structure of the functional human NOX2-p22 complex in nanodisc in the resting state. NOX2 shows a canonical 6-TM architecture of NOX and p22 has four transmembrane helices. M3, M4, and M5 of NOX2, and M1 and M4 helices of p22 are involved in the heterodimer formation. Dehydrogenase (DH) domain of NOX2 in the resting state is not optimally docked onto the transmembrane domain, leading to inefficient electron transfer and NADPH binding. Structural analysis suggests that the cytosolic factors might activate the NOX2-p22 complex by stabilizing the DH in a productive docked conformation.

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Primary Citation of related structures