EMD-44434

Single-particle
3.1 Å
EMD-44434 Deposition: 09/04/2024
Map released: 27/11/2024
Last modified: 27/11/2024
Overview 3D View Sample Experiment Validation Volume Browser Additional data Links
Overview 3D View Sample Experiment Validation Volume Browser Additional data Links

EMD-44434

Extracellular domain of GC-A bound to ANP

EMD-44434

Single-particle
3.1 Å
EMD-44434 Deposition: 09/04/2024
Map released: 27/11/2024
Last modified: 27/11/2024
Overview 3D View Sample Experiment Validation Volume Browser Additional data Links
Sample Organism: Homo sapiens
Sample: Atrial natriuretic peptide receptor 1 dimer
Fitted models: 9bcq (Avg. Q-score: 0.599)

Deposition Authors: Liu S , Huang X
Architecture and activation of single-pass transmembrane receptor guanylyl cyclase.
Liu S , Payne AM , Wang J, Zhu L, Paknejad N , Eng ET , Liu W , Miao Y , Hite RK , Huang XY
(2024) Nat Struct Mol Biol
PUBMED: 39543315
DOI: doi:10.1038/s41594-024-01426-z
ISSN: 1545-9985
Abstract:
The heart, in addition to its primary role in blood circulation, functions as an endocrine organ by producing cardiac hormone natriuretic peptides. These hormones regulate blood pressure through the single-pass transmembrane receptor guanylyl cyclase A (GC-A), also known as natriuretic peptide receptor 1. The binding of the peptide hormones to the extracellular domain of the receptor activates the intracellular guanylyl cyclase domain of the receptor to produce the second messenger cyclic guanosine monophosphate. Despite their importance, the detailed architecture and domain interactions within full-length GC-A remain elusive. Here we present cryo-electron microscopy structures, functional analyses and molecular dynamics simulations of full-length human GC-A, in both the absence and the presence of atrial natriuretic peptide. The data reveal the architecture of full-length GC-A, highlighting the spatial arrangement of its various functional domains. This insight is crucial for understanding how different parts of the receptor interact and coordinate during activation. The study elucidates the molecular basis of how extracellular signals are transduced across the membrane to activate the intracellular guanylyl cyclase domain.