8XOL image
Entry Detail
PDB ID:
8XOL
EMDB ID:
Title:
Cryo-EM structure of human ABCC4 with ANP bound in NBD1
Biological Source:
PDB Version:
Deposition Date:
2024-01-01
Release Date:
2024-07-17
Method Details:
Experimental Method:
Resolution:
3.02 Å
Aggregation State:
PARTICLE
Reconstruction Method:
SINGLE PARTICLE
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:ATP-binding cassette sub-family C member 4
Chain IDs:A
Chain Length:1325
Number of Molecules:1
Biological Source:Homo sapiens
Primary Citation
The ATP-bound inward-open conformation of ABCC4 reveals asymmetric ATP binding for substrate transport.
Febs Lett. 598 1967 1980 (2024)
PMID: 38886124 DOI: 10.1002/1873-3468.14955

Abstact

The multidrug resistance-associated protein (MRP) ABCC4 facilitates substrate transport across the cytoplasmic membrane, crucial for normal physiology and mediating multidrug resistance in tumor cells. Despite intensive studies on MRPs, ABCC4's transport mechanism remains incompletely understood. In this study, we unveiled an inward-open conformation with an ATP bound to degenerate NBD1. Additionally, we captured the structure with both ATP and substrate co-bound in the inward-open state. Our findings uncover the asymmetric ATP binding in ABCC4 and provide insights into substrate binding and transport mechanisms. ATP binding to NBD1 is parallel to substrate binding to ABCC4, and is a prerequisite for ATP-bound NBD2-induced global conformational changes. Our findings shed new light on targeting ABCC4 in combination with anticancer therapy.

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