8CZJ image
Entry Detail
PDB ID:
8CZJ
Title:
A bacteria Zrt/Irt-like protein in the apo state
Biological Source:
Host Organism:
PDB Version:
Deposition Date:
2022-05-24
Release Date:
2023-02-22
Method Details:
Experimental Method:
Resolution:
2.75 Å
R-Value Free:
0.26
R-Value Work:
0.23
R-Value Observed:
0.23
Space Group:
P 1 21 1
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Putative membrane protein
Chain IDs:A, B
Chain Length:309
Number of Molecules:2
Biological Source:Bordetella bronchiseptica RB50
Primary Citation
Structural insights into the elevator-type transport mechanism of a bacterial ZIP metal transporter.
Nat Commun 14 385 385 (2023)
PMID: 36693843 DOI: 10.1038/s41467-023-36048-4

Abstact

The Zrt-/Irt-like protein (ZIP) family consists of ubiquitously expressed divalent metal transporters critically involved in maintaining systemic and cellular homeostasis of zinc, iron, and manganese. Here, we present a study on a prokaryotic ZIP from Bordetella bronchiseptica (BbZIP) by combining structural biology, evolutionary covariance, computational modeling, and a variety of biochemical assays to tackle the issue of the transport mechanism which has not been established for the ZIP family. The apo state structure in an inward-facing conformation revealed a disassembled transport site, altered inter-helical interactions, and importantly, a rigid body movement of a 4-transmembrane helix (TM) bundle relative to the other TMs. The computationally generated and biochemically validated outward-facing conformation model revealed a slide of the 4-TM bundle, which carries the transport site(s), by approximately 8 Å toward the extracellular side against the static TMs which mediate dimerization. These findings allow us to conclude that BbZIP is an elevator-type transporter.

Legend

Protein

Chemical

Disease

Primary Citation of related structures