7ZHK image
Entry Detail
PDB ID:
7ZHK
Keywords:
UNKNOWN FUNCTION
Title:
GPN-loop GTPase from Sulfolobus acidocaldarius open state (GDP)
Biological Source:
Source Organism:
Sulfolobus acidocaldarius
Host Organism:
Escherichia coli
PDB Version:
Deposition Date:
2022-04-06
Release Date:
2023-10-25
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
2.40 Å
R-Value Free:
0.24
R-Value Work:
0.18
R-Value Observed:
0.19
Space Group:
C 2 2 21
7ZHK validation report
Macromolecular Entities
Protein Blast
Polymer Type:polypeptide(L)
Description:GTPase
Chain IDs:A, B, C
Chain Length:274
Number of Molecules:3
Biological Source:Sulfolobus acidocaldarius
UniProt ID:A0A0U2WWJ1 Pfam ID:PF03029
Ligand Molecules
GDP
MG
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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Chemical

Disease

Primary Citation of related structures
7ZHF