About: Abstract A statistically significant similarity was demonstrated between the amino acid sequences of 4 Escherichia coli helicases and helicase subunits, a family of non-structural proteins of eukaryotic positive-strand RNA viruses and 2 herpesvirus proteins all of which contain an NTP-binding sequence motif. Based on sequence analysis and secondary structure predictions, a generalized structural model for the ATP-binding core is proposed. It is suggested that all these proteins constitute a superfamily of helicases (or helicase subunits) involved in NTP-dependent duplex unwinding during DNA and RNA replication and recombination.   Goto Sponge  NotDistinct  Permalink

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  • Abstract A statistically significant similarity was demonstrated between the amino acid sequences of 4 Escherichia coli helicases and helicase subunits, a family of non-structural proteins of eukaryotic positive-strand RNA viruses and 2 herpesvirus proteins all of which contain an NTP-binding sequence motif. Based on sequence analysis and secondary structure predictions, a generalized structural model for the ATP-binding core is proposed. It is suggested that all these proteins constitute a superfamily of helicases (or helicase subunits) involved in NTP-dependent duplex unwinding during DNA and RNA replication and recombination.
subject
  • Biomolecules
  • Nucleic acids
  • DNA replication
  • EC 3.6.4
  • Protein domains
  • Viral nonstructural proteins
  • Virus families
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