Expression, Purification, and Preliminary X-Ray Crystallographic Analysis of the Complex of Gαi3-RGS5 from Human with GDP/Mg2+/AlF4 -

Author(s): Kyung-Hee Rhee, Ki-Hyun Nam, Won-Ho Lee, Young-Gyu Ko, Eunice Eunkyeong Kim, Kwang Yeon Hwang.

Journal Name: Protein & Peptide Letters

Volume 13 , Issue 9 , 2006

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Abstract:

Regulator of G-protein signaling 5 (RGS5), an inhibitor of Gq and Gi activation, is a member of the small RGS protein subfamily. However, despite significant process in the investigation of RGS5, no structure is yet available. In order to elucidate the mechanism of the RGS5 in G protein signaling pathway, we have overexpressed the RGS5 and G_i3 from human in Escherichia coli and crystallized the complex of RGS5 and Gαi3 proteins with GDP/Mg2+/AlF4 - at 3.0 Å resolution using a synchrotron radiation source. The complex crystals belong to the tetragonal space group P41212 or P43212, with unit cell parameters a=b=95.9 Å, and c=138.8 Å. Assuming one complex protein in the crystallographic asymmetric unit, the calculated Matthews parameter (VM) is 2.57 Å3/Da and solvent content is 52.2 %.

Keywords: Regulator of G-protein signaling 5, Gαi3, G protein signaling pathway, crystallization

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Article Details

VOLUME: 13
ISSUE: 9
Year: 2006
Page: [945 - 949]
Pages: 5
DOI: 10.2174/092986606778256225
Price: $58

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