The Architecture of Yeast DNA Polymerase ζ

Yacob Gómez-Llorente, Radhika Malik, Rinku Jain, Jayati Roy Choudhury, Robert E. Johnson, Louise Prakash, Satya Prakash, Iban Ubarretxena-Belandia, Aneel K. Aggarwal

Research output: Contribution to journalArticlepeer-review

25 Scopus citations

Abstract

DNA polymerase ζ (Polζ) is specialized for the extension step of translesion DNA synthesis (TLS). Despite its central role in maintaining genome integrity, little is known about its overall architecture. Initially identified as a heterodimer of the catalytic subunit Rev3 and the accessory subunit Rev7, yeast Polζ has recently been shown to form a stable four-subunit enzyme (Polζ-d) upon the incorporation of Pol31 and Pol32, the accessory subunits of yeast Polδ. To understand the 3D architecture and assembly of Polζ and Polζ-d, we employed electron microscopy. We show here how the catalytic and accessory subunits of Polζ and Polζ-d are organized relative to each other. In particular, we show that Polζ-d has a bilobal architecture resembling the replicative polymerases and that Pol32 lies in proximity to Rev7. Collectively, our study provides views of Polζ and Polζ-d and a structural framework for understanding their roles in DNA damage bypass

Original languageEnglish (US)
Pages (from-to)79-86
Number of pages8
JournalCell Reports
Volume5
Issue number1
DOIs
StatePublished - Oct 17 2013

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)

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