2GIL image
Deposition Date 2006-03-29
Release Date 2006-06-27
Last Version Date 2023-08-30
Entry Detail
PDB ID:
2GIL
Keywords:
PROTEIN TRANSPORT
Title:
Structure of the extremely slow GTPase Rab6A in the GTP bound form at 1.8 resolution
Biological Source:
Source Organism:
Homo sapiens (Taxon ID: 9606)
Host Organism:
Escherichia coli BL21(DE3)
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
1.82 Å
R-Value Free:
0.27
R-Value Work:
0.20
R-Value Observed:
0.20
Space Group:
P 1 21 1
2GIL validation report
Macromolecular Entities
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Ras-related protein Rab-6A
Gene (Uniprot):RAB6A
Chain IDs:A, B, C, D
Chain Length:162
Number of Molecules:4
Biological Source:Homo sapiens
UniProt ID:P20340 Pfam ID:PF00071
Ligand Molecules
GTP
MG
Primary Citation
Structure of the extremely slow GTPase Rab6A in the GTP bound form at 1.8 resolution
J.STRUCT.BIOL. 152 235 238 (2005)
PMID: 16332443 DOI: 10.1016/j.jsb.2005.10.001

Abstact

Rab/Ypt GTPases represent a>60 member large family of membrane traffic regulators in eukaryotic cells. Members of this group display intrinsic GTPase activity varying over two orders of magnitude. Here, we show that Rab6A represents the RabGTPase with the slowest spontaneous GTPase activity yet measured (5x10(-6)s(-1)). Due to the very low intrinsic hydrolysis rate we were able to crystallise and solve the structure of the Rab6A:GTP complex to 1.82A resolution. Analysis of the structure suggests that low catalytic activity of the Rab6A might be due to high flexibility of the Switch II region and a low degree of constraint of critically important for catalysis Gln 72.

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Primary Citation of related structures
2GIL