Detection of PCNA modifications in Saccharomyces cerevisiae

Methods Mol Biol. 2012;920:543-67. doi: 10.1007/978-1-61779-998-3_36.


PCNA modifications by members of the ubiquitin family are associated with a range of different transactions during replication of damaged and undamaged DNA. This chapter describes detailed protocols for the detection and isolation of ubiquitin and SUMO conjugates of PCNA from total budding yeast cell lysates, using Ni-NTA affinity chromatography under denaturing conditions. We describe approaches based on the purification of PCNA itself and on the isolation of total ubiquitin or SUMO conjugates. The chapter covers the construction of the appropriate strains, methods for the detection of modified PCNA, and the use of various DNA-damaging agents as well as mutants of PCNA and relevant conjugation enzymes to examine the cellular response to replication stress.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Blotting, Western
  • Chromatography, Affinity
  • DNA Damage
  • Electrophoresis, Polyacrylamide Gel
  • Nitrilotriacetic Acid / analogs & derivatives
  • Nitrilotriacetic Acid / chemistry
  • Organometallic Compounds / chemistry
  • Proliferating Cell Nuclear Antigen / isolation & purification
  • Proliferating Cell Nuclear Antigen / metabolism*
  • SUMO-1 Protein
  • Saccharomyces cerevisiae / genetics
  • Saccharomyces cerevisiae / metabolism*
  • Saccharomyces cerevisiae Proteins / isolation & purification
  • Saccharomyces cerevisiae Proteins / metabolism*
  • Ubiquitination


  • Organometallic Compounds
  • Proliferating Cell Nuclear Antigen
  • SUMO-1 Protein
  • Saccharomyces cerevisiae Proteins
  • nickel nitrilotriacetic acid
  • Nitrilotriacetic Acid