4pc2
From Proteopedia
(Difference between revisions)
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== Function == | == Function == | ||
[[http://www.uniprot.org/uniprot/B1X6I9_ECODH B1X6I9_ECODH]] This protein promotes the GTP-dependent binding of aminoacyl-tRNA to the A-site of ribosomes during protein biosynthesis.[HAMAP-Rule:MF_00118] [[http://www.uniprot.org/uniprot/C3TPM7_ECOLX C3TPM7_ECOLX]] Associates with the EF-Tu.GDP complex and induces the exchange of GDP to GTP. It remains bound to the aminoacyl-tRNA.EF-Tu.GTP complex up to the GTP hydrolysis stage on the ribosome.[HAMAP-Rule:MF_00050][RuleBase:RU000642] | [[http://www.uniprot.org/uniprot/B1X6I9_ECODH B1X6I9_ECODH]] This protein promotes the GTP-dependent binding of aminoacyl-tRNA to the A-site of ribosomes during protein biosynthesis.[HAMAP-Rule:MF_00118] [[http://www.uniprot.org/uniprot/C3TPM7_ECOLX C3TPM7_ECOLX]] Associates with the EF-Tu.GDP complex and induces the exchange of GDP to GTP. It remains bound to the aminoacyl-tRNA.EF-Tu.GTP complex up to the GTP hydrolysis stage on the ribosome.[HAMAP-Rule:MF_00050][RuleBase:RU000642] | ||
| + | <div style="background-color:#fffaf0;"> | ||
| + | == Publication Abstract from PubMed == | ||
| + | Translation elongation factor EF-Tu belongs to the superfamily of guanine-nucleotide binding proteins, which play key cellular roles as regulatory switches. All G-proteins require activation via exchange of GDP for GTP to carry out their respective tasks. Often, guanine-nucleotide exchange factors are essential to this process. During translation, EF-Tu:GTP transports aminoacylated tRNA to the ribosome. GTP is hydrolyzed during this process, and subsequent reactivation of EF-Tu is catalyzed by EF-Ts. The reaction path of guanine-nucleotide exchange is structurally poorly defined for EF-Tu and EF-Ts. We have determined the crystal structures of the following reaction intermediates: two structures of EF-Tu:GDP:EF-Ts (2.2 and 1.8A resolution), EF-Tu:PO4:EF-Ts (1.9A resolution), EF-Tu:GDPNP:EF-Ts (2.2A resolution) and EF-Tu:GDPNP:pulvomycin:Mg2+:EF-Ts (3.5A resolution). These structures provide snapshots throughout the entire exchange reaction and suggest a mechanism for the release of EF-Tu in its GTP conformation. An inferred sequence of events during the exchange reaction is presented. | ||
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| + | Structural outline of the detailed mechanism for elongation factor Ts-mediated guanine nucleotide exchange on elongation factor Tu.,Thirup SS, Van LB, Nielsen TK, Knudsen CR J Struct Biol. 2015 Jun 11. pii: S1047-8477(15)30015-0. doi:, 10.1016/j.jsb.2015.06.011. PMID:26073967<ref>PMID:26073967</ref> | ||
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| + | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | ||
| + | </div> | ||
| + | == References == | ||
| + | <references/> | ||
__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
Revision as of 12:03, 1 July 2015
Elongation factor Tu:Ts complex with a bound GDP
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