Reference: Goyer C, et al. (1989) Identification and characterization of cap-binding proteins from yeast. J Biol Chem 264(13):7603-10

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Abstract


Photochemical cross-linking of Saccharomyces cerevisiae ribosomal salt wash preparations to cap-labeled mRNA reveals, in addition to the previously characterized 24-kDa cap-binding protein (eIF-4E), the presence of two novel cap-binding proteins (CBPs) of apparent molecular masses of 96 and 150 kDa. Cross-linking of the 96-kDa CBP was found to occur spontaneously without UV light induction. Based on the ATP/Mg2+ requirements, the three CBPs can be subdivided into two classes: 1) ATP/Mg2+ independent (24- and 150 kDa) and 2) Mg2+ dependent (96 kDa). The co-purification of the 24- and 150-kDa CBPs through several different chromatographic steps is consistent with the existence of a yeast CBP complex, possibly analogous to mammalian eIF-4F.

Reference Type
Journal Article | Research Support, Non-U.S. Gov't
Authors
Goyer C, Altmann M, Trachsel H, Sonenberg N
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