7ZHF image
Entry Detail
PDB ID:
7ZHF
Title:
GPN-loop GTPase from Sulfolobus acidocaldarius closed state (GppNHp)
Biological Source:
Source Organism:
PDB Version:
Deposition Date:
2022-04-06
Release Date:
2023-10-25
Method Details:
Experimental Method:
Resolution:
1.80 Å
R-Value Free:
0.20
R-Value Work:
0.17
R-Value Observed:
0.17
Space Group:
I 1 2 1
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:GTPase
Chain IDs:A
Chain Length:274
Number of Molecules:1
Biological Source:Sulfolobus acidocaldarius
Primary Citation
Archaeal GPN-loop GTPases involve a lock-switch-rock mechanism for GTP hydrolysis.
Mbio 14 e0085923 e0085923 (2023)
PMID: 37962382 DOI: 10.1128/mbio.00859-23

Abstact

GPN-loop GTPases have been found to be crucial for eukaryotic RNA polymerase II assembly and nuclear trafficking. Despite their ubiquitous occurrence in eukaryotes and archaea, the mechanism by which these GTPases mediate their function is unknown. Our study on an archaeal representative from Sulfolobus acidocaldarius showed that these dimeric GTPases undergo large-scale conformational changes upon GTP hydrolysis, which can be summarized as a lock-switch-rock mechanism. The observed requirement of SaGPN for motility appears to be due to its large footprint on the archaeal proteome.

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