Molecular and General Genetics MGG

, Volume 160, Issue 3, pp 247–257 | Cite as

Identification of Escherichia coli and Bacillus stearothermophilus ribosomal protein binding sites on Escherichia coli 5S RNA

  • Jürgen Zimmermann
  • Volker A. Erdmann
Article

Summary

E. coli [32P]-labelled 5S RNA was complexed with E. coli and B. stearothermophilus 50S ribosomal proteins. Limited T1 RNase digestion of each complex yielded three major fragments which were analysed for their sequences and rebinding of proteins. The primary binding sites for the E. coli binding proteins were determined to be sequences 18 to 57 for E-L5, 58 to 100 for E-L18 and 101 to 116 for E-L25. Rebinding experiments of purified E. coli proteins to the 5S RNA fragments led to the conclusion that E-L5 and E-L25 have secondary binding sites in the section 58 to 100, the primary binding site for E-L18. Since B. stearothermophilus proteins B-L5 and BL22 were found to interact with sequences 18 to 57 and 58 to 100 it was established that the thermophile proteins recognize and interact with RNA sequences similar to those of E. coli. Comparison of the E. coli 5S RNA sequence with those of other prokaryotic 5S RNAs reveals that the ribosomal proteins interact with the most conserved sections of the RNA.

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Copyright information

© Springer-Verlag 1978

Authors and Affiliations

  • Jürgen Zimmermann
    • 1
  • Volker A. Erdmann
    • 1
  1. 1.Abt. WittmannMax-Planck-Institut für Molekulare GenetikBerlin 33
  2. 2.Abt. Biochemie der PflanzeFreie Universität Berlin, Institut für Pflanzenphysiologie und ZellbiologieBerlin-Dahlem

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