ISDA

Deposition Date 2006-07-25

Release Date 2006-10-31

Last Version Date 2024-02-14

Entry Detail

PDB ID:

2HT6

Keywords:

SIGNALING PROTEIN

Title:

Crystal structure of Human Gem G-domain bound to GDP

Biological Source:

Source Organism:

Homo sapiens (Taxon ID: 9606)

Host Organism:

Escherichia coli

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.40 Å

R-Value Free:

0.28

R-Value Work:

0.22

R-Value Observed:

0.22

Space Group:

P 21 21 21

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Molecule:GTP-binding protein GEM
Gene (Uniprot):GEM
Chain IDs:A, B
Chain Length:174
Number of Molecules:2
Biological Source:Homo sapiens

UniProt ID:P55040 Pfam ID:PF00071

Ligand Molecules

GDP

Primary Citation

Structure-function studies of the G-domain from human gem, a novel small G-protein.

Opatowsky, Y, Sasson, Y, Shaked, I, Ward, Y, Chomsky-Hecht, O, Litvak, Y, Selinger, Z, Kelly, K, Hirsch, J.A.Show

Febs Lett. 580 5959 5964 (2006)

PMID: 17052716 DOI: 10.1016/j.febslet.2006.09.067

Abstact

Gem, a member of the Rad,Gem/Kir subfamily of small G-proteins, has unique sequence features. We report here the crystallographic structure determination of the Gem G-domain in complex with nucleotide to 2.4 A resolution. Although the basic Ras protein fold is maintained, the Gem switch regions emphatically differ from the Ras paradigm. Our ensuing biochemical characterization indicates that Gem G-domain markedly prefers GDP over GTP. Two known functions of Gem are distinctly affected by spatially separated clusters of mutations.

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Primary Citation of related structures