These proteins consist of three structural domains: the GTP-binding domain, and two oligonucleotide binding domains that are often referred to as domain 2 and domain 3.
Domain 2 adopts a beta-barrel structure, and is involved in binding to charged tRNA.[7] This domain is structurally related to the C-terminal domain of EF2, to which it displays weak sequence similarity. This domain is also found in other proteins such as translation initiation factor IF-2 and tetracycline-resistance proteins.
Domain 3 represents the C-terminal domain, which adopts a beta-barrel structure, and is involved in binding to both charged tRNA and to EF1B (or EF-Ts).[8]
References
^Moller W, Schipper A, Amons R (September 1987). "A conserved amino acid sequence around Arg-68 of Artemia elongation factor 1 alpha is involved in the binding of guanine nucleotides and aminoacyl transfer RNAs". Biochimie. 69 (9): 983–9. doi:10.1016/0300-9084(87)90232-X. PMID3126836.
^Grentzmann G, Brechemier-Baey D, Heurgué-Hamard V, Buckingham RH (May 1995). "Function of polypeptide chain release factor RF-3 in Escherichia coli. RF-3 action in termination is predominantly at UGA-containing stop signals". J. Biol. Chem. 270 (18): 10595–600. doi:10.1074/jbc.270.18.10595. PMID7737996.{{cite journal}}: CS1 maint: unflagged free DOI (link)
^Nelson RJ, Ziegelhoffer T, Nicolet C, Werner-Washburne M, Craig EA (October 1992). "The translation machinery and 70 kd heat shock protein cooperate in protein synthesis". Cell. 71 (1): 97–105. doi:10.1016/0092-8674(92)90269-I. PMID1394434.
^Ann DK, Moutsatsos IK, Nakamura T, Lin HH, Mao PL, Lee MJ, Chin S, Liem RK, Wang E (June 1991). "Isolation and characterization of the rat chromosomal gene for a polypeptide (pS1) antigenically related to statin". J. Biol. Chem. 266 (16): 10429–37. PMID1709933.
^Forchhammer K, Leinfelder W, Bock A (November 1989). "Identification of a novel translation factor necessary for the incorporation of selenocysteine into protein". Nature. 342 (6248): 453–6. doi:10.1038/342453a0. PMID2531290.
^Nissen P, Kjeldgaard M, Thirup S, Polekhina G, Reshetnikova L, Clark BF, Nyborg J (December 1995). "Crystal structure of the ternary complex of Phe-tRNAPhe, EF-Tu, and a GTP analog". Science. 270 (5241): 1464–72. doi:10.1126/science.270.5241.1464. PMID7491491.
^Wang Y, Jiang Y, Meyering-Voss M, Sprinzl M, Sigler PB (August 1997). "Crystal structure of the EF-Tu.EF-Ts complex from Thermus thermophilus". Nat. Struct. Biol. 4 (8): 650–6. doi:10.1038/nsb0897-650. PMID9253415.