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1g7c
From Proteopedia
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'''YEAST EEF1A:EEF1BA IN COMPLEX WITH GDPNP''' | '''YEAST EEF1A:EEF1BA IN COMPLEX WITH GDPNP''' | ||
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[[Category: Pedersen, L.]] | [[Category: Pedersen, L.]] | ||
[[Category: Valente, L.]] | [[Category: Valente, L.]] | ||
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Revision as of 14:13, 2 May 2008
YEAST EEF1A:EEF1BA IN COMPLEX WITH GDPNP
Overview
In the elongation cycle of protein biosynthesis, the nucleotide exchange factor eEF1Balpha catalyzes the exchange of GDP bound to the G-protein, eEF1A, for GTP. To obtain more information about the recently solved eEF1A-eEF1Balpha structure, we determined the structures of the eEF1A-eEF1Balpha-GDP-Mg2+, eEF1A-eEF1Balpha-GDP and eEF1A-eEF1Balpha-GDPNP complexes at 3.0, 2.4 and 2.05 A resolution, respectively. Minor changes, specifically around the nucleotide binding site, in eEF1A and eEF1Balpha are consistent with in vivo data. The base, sugar and alpha-phosphate bind as in other known nucleotide G-protein complexes, whereas the beta- and gamma-phosphates are disordered. A mutation of Lys 205 in eEF1Balpha that inserts into the Mg2+ binding site of eEF1A is lethal. This together with the structures emphasizes the essential role of Mg2+ in nucleotide exchange in the eEF1A-eEF1Balpha complex.
About this Structure
1G7C is a Protein complex structure of sequences from Saccharomyces cerevisiae. Full crystallographic information is available from OCA.
Reference
Crystal structures of nucleotide exchange intermediates in the eEF1A-eEF1Balpha complex., Andersen GR, Valente L, Pedersen L, Kinzy TG, Nyborg J, Nat Struct Biol. 2001 Jun;8(6):531-4. PMID:11373622 Page seeded by OCA on Fri May 2 17:13:56 2008
