Reference: Xiang RH and Lee JC (1989) Identification of neighboring protein pairs in the 60 S ribosomal subunits from Saccharomyces cerevisiae by chemical cross-linking. J Biol Chem 264(18):10542-6

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Abstract


Protein-protein cross-linking was used to determine the spatial arrangement of proteins within the 60 S ribosomal subunits of Saccharomyces cerevisiae. Protein cross-links were generated by treatment of intact ribosomal subunits with dimethyl 3,3'-dithiobispropionimidate. Proteins were extracted from the treated subunits and fractionated by Cm-cellulose chromatography. Cross-linked proteins in these fractions were analyzed by electrophoresis on two-dimensional diagonal polyacrylamide gels containing sodium dodecyl sulfate. Component members of cross-linked pairs were radiolabeled with 125I and identified by two-dimensional gel electrophoresis and comparison with nonradioactive ribosomal protein markers. Seventeen pairs involving 16 of the 45 60 S subunit proteins were identified. Several proteins were detected in numerous cross-linked dimers and were used as foci for constructing a model depicting the arrangement of proteins within the 60 S ribosomal subunit. The model also incorporated previously published data on structure and function of proteins from the yeast 60 S subunit.

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Journal Article | Research Support, U.S. Gov't, P.H.S.
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Xiang RH, Lee JC
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