Occurrence of Four Subunits in High Molecular Weight Forms of Polypeptide Chain Elongation Factor 1 from Wheat Embryo
- 1 July 1983
- journal article
- research article
- Published by Oxford University Press (OUP) in The Journal of Biochemistry
- Vol. 94 (1) , 319-322
- https://doi.org/10.1093/oxfordjournals.jbchem.a134348
Abstract
In contrast to high molecular weight forms of elongation factor 1 (EF-1H) from animal sources which contain three subunits, EF-1a, EF-1b, and EF-1c, EF-1H from wheat embryo consisted of four subunits, EF-1a, EF-1b, EF-1b', and EF-1c, in an equimolar ratio. The molecular weights of EF-1a, EF-1b, EF-1b', and EF-1c from wheat embryo were 52,000, 29,000, 28,000, and 48,000, respectively. In the animal system, EF-1a and EF-1b correspond functionally to EF-Tu and EF-Ts, respectively. In the wheat system, however, both EF-1b and EF-1b' had the EF-Ts-like activity to stimulate EF-1a-dependent binding of aminoacyl-tRNA to ribo-somes. EF-1b and EF-1b' from wheat embryo gave 21 and 20 tryptic peptides, respectively. Twenty peptides were common.Keywords
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