ISDA

Entry Detail

PDB ID:

7ZHF

Keywords:

UNKNOWN FUNCTION

Title:

GPN-loop GTPase from Sulfolobus acidocaldarius closed state (GppNHp)

Biological Source:

Source Organism:

Sulfolobus acidocaldarius

Host Organism:

Escherichia coli BL21(DE3)

PDB Version:

Deposition Date:

2022-04-06

Release Date:

2023-10-25

Method Details:

Experimental Method:

X-RAY DIFFRACTION

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

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Description:GTPase
Chain IDs:A
Chain Length:274
Number of Molecules:1
Biological Source:Sulfolobus acidocaldarius

UniProt ID:A0A0U2WWJ1 Pfam ID:PF03029

Ligand Molecules

GNP

GOL

Primary Citation

Archaeal GPN-loop GTPases involve a lock-switch-rock mechanism for GTP hydrolysis.

Korf, L, Ye, X, Vogt, M.S, Steinchen, W, Watad, M, van der Does, C, Tourte, M, Sivabalasarma, S, Albers, S.-V, Essen, L.-O.Show

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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Primary Citation of related structures