ISDA

Entry Detail

PDB ID:

4EFN

Keywords:

SIGNALING PROTEIN

Title:

Crystal structure of H-Ras Q61L in complex with GppNHp (state 1)

Biological Source:

Source Organism:

Homo sapiens

Host Organism:

Escherichia coli

PDB Version:

Deposition Date:

2012-03-30

Release Date:

2012-05-16

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.30 Å

R-Value Free:

0.23

R-Value Work:

0.18

R-Value Observed:

0.18

Space Group:

I 2 2 2

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Description:GTPase HRas
Mutations:Q61L
Chain IDs:A
Chain Length:171
Number of Molecules:1
Biological Source:Homo sapiens

UniProt ID:P01112 Pfam ID:PF00071 EC:3.6.5.2

Ligand Molecules

GNP

Primary Citation

Crystal structures of the state 1 conformations of the GTP-bound H-Ras protein and its oncogenic G12V and Q61L mutants

Muraoka, S, Shima, F, Araki, M, Inoue, T, Yoshimoto, A, Ijiri, Y, Seki, N, Tamura, A, Kumasaka, T, Yamamoto, M, Kataoka, T.Show

Febs Lett. 586 1715 1718 (2012)

PMID: 22584058 DOI: 10.1016/j.febslet.2012.04.058

Abstact

GTP-bound Ras adopts two interconverting conformations, "inactive" state 1 and "active" state 2. However, the tertiary structure of wild-type (WT) state 1 remains unsolved. Here we solve the state 1 crystal structures of H-Ras WT together with its oncogenic G12V and Q61L mutants. They assume open structures characterized by impaired interactions of both Thr-35 in switch I and Gly-60 in switch II with the γ-phosphate of GTP and possess two surface pockets of mutually different shapes unseen in state 2, a potential target for selective inhibitor development. Furthermore, they provide a structural basis for the low GTPase activity of state 1.

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Primary Citation of related structures