Deoxynucleotide triphosphate binding mode conserved in Y family DNA polymerases

Robert E. Johnson, José Trincao, Aneel K. Aggarwal, Satya Prakash, Louise Prakash

Research output: Contribution to journalArticlepeer-review

20 Scopus citations


Although DNA polymerase η (Polη) and other Y family polymerases differ in sequence and function from classical DNA polymerases, they all share a similar right-handed architecture with the palm, fingers, and thumb domains. Here, we examine the role in Saccharomyces cerevisiae Polη of three conserved residues, tyrosine 64, arginine 67, and lysine 279, which come into close contact with the triphosphate moiety of the incoming nucleotide, in nucleotide incorporation. We find that mutational alteration of these residues reduces the efficiency of correct nucleotide incorporation very considerably. The high degree of conservation of these residues among the various Y family DNA polymerases suggests that these residues are also crucial for nucleotide incorporation in the other members of the family. Furthermore, we note that tyrosine 64 and arginine 67 are functionally equivalent to the deoxynucleotide triphosphate binding residues arginine 518 and histidine 506 in T7 DNA polymerase, respectively.

Original languageEnglish (US)
Pages (from-to)3008-3012
Number of pages5
JournalMolecular and cellular biology
Issue number8
StatePublished - Apr 2003

ASJC Scopus subject areas

  • Molecular Biology
  • Cell Biology


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