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O4-(5'-uridylyl)tyrosine is the bond between the genome-linked protein and the RNA of poliovirus.

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Rothberg, P G, Harris, T J, Nomoto, A, Wimmer, E·1978·Proceedings of the National Academy of Sciences

Abstract

Virion RNA of poliovirus type 1 has been analyzed for the linkage between genome-protein VPg and the polyribonucleotide chain. Hydrolysis of the linkage with acid or alkali and enzymatic degradation lead to the conclusion that the bond is neither a phosphodiester such as nucleotidyl-(P-O)-serine (or threonine) nor a phosphoramidate such as nucleotidyl-(P-N)-amino acid. VPg-RNA can be iodinated by the Bolton and Hunter reagent [iodinated 3-(4-hydroxyphenyl)propionic acid N-hydroxysuccinimide ester] but not by the chloramine-T or lactoperoxidase procedures, an observation suggesting that VPg does not contain accessible tyrosine. However, VPg can be labeled with [3H]tyrosine in vivo. Hydrolysis of VPg-[32P]pUp with 5.6 M HCl at 110 degrees yielded 32P-labeled O4-(3'-phospho-5'-uridylyl)tyrosine that could be cleaved with micrococcal nuclease to O4-[32P]phosphotyrosine and uridine 3'-[32P]phosphate. These data establish that VPg is linked to the poliovirus genome by a bond between the O4 of tyrosine and the 5'-P atom of the terminal uridylic acid residue. The 5' end of polio genome RNA can now be described as VPg(Tyr-O)-pU-U-A-A-A-A-C-A-G.

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Metadata

Authors
Rothberg, P. G., Harris, T. J., Nomoto, A., & Wimmer, E.
Venue
Proceedings of the National Academy of Sciences
Published
1978-10
Volume
75
Issue
10
Pages
4868-4872
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2151062650
Cited by
249
References
0
FWCI
16.70
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: O4-(5'-uridylyl)tyrosine is the bond between the genome-linked protein and the RNA of poliovirus. https://app.cochat.ai/papers/10.1073/pnas.75.10.4868
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Rothberg, P. G., Harris, T. J., Nomoto, A., & Wimmer, E. (1978). O4-(5'-uridylyl)tyrosine is the bond between the genome-linked protein and the RNA of poliovirus. Proceedings of the National Academy of Sciences. https://doi.org/10.1073/pnas.75.10.4868

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