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  Domain Name: Translation_factor_I
Domain III of Elongation factor (EF) Tu (EF-TU) and EF-G. Elongation factors (EF) EF-Tu and EF-G participate in the elongation phase during protein biosynthesis on the ribosome. Their functional cycles depend on GTP binding and its hydrolysis. The EF-Tu complexed with GTP and aminoacyl-tRNA delivers tRNA to the ribosome, whereas EF-G stimulates translocation, a process in which tRNA and mRNA movements occur in the ribosome. Experimental data showed that: (1) intrinsic GTPase activity of EF-G is influenced by excision of its domain III; (2) that EF-G lacking domain III has a 1,000-fold decreased GTPase activity on the ribosome and, a slightly decreased affinity for GTP; and (3) EF-G lacking domain III does not stimulate translocation, despite the physical presence of domain IV which is also very important for translocation. These findings indicate an essential contribution of domain III to activation of GTP hydrolysis. Domains III and V of EF-G have the same fold (although they are not completely superimposable), the double split beta-alpha-beta fold. This fold is observed in a large number of ribonucleotide binding proteins and is also referred to as the ribonucleoprotein (RNP) or RNA recognition (RRM) motif. This domain III is found in several elongation factors, as well as in peptide chain release factors and in GT-1 family of GTPase (GTPBP1).
No pairwise interactions are available for this conserved domain.

Total Mutations Found: 0
Total Disease Mutations Found: 0
This domain occurred 8 times on human genes (13 proteins).




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No Conserved Features/Sites Found for Translation_factor_I








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Please Cite: Peterson, T.A., Adadey, A., Santana-Cruz ,I., Sun, Y., Winder A, Kann, M.G., (2010) DMDM: Domain Mapping of Disease Mutations. Bioinformatics 26 (19), 2458-2459.

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