title: Epitope tag-induced synthetic lethality between cohesin subunits and Ctf7/Eco1 acetyltransferase.
abstract: Ctf7/Eco1-dependent acetylation of Smc3 is essential for sister chromatid cohesion. Here, we use epitope tag-induced lethality in cells diminished for Ctf7/Eco1 activity to map cohesin architecture in vivo. Tagging either Smc1 or Mcd1/Scc1, but not Scc3/Irr1, appears to abolish access to Smc3 in ctf7/eco1 mutant cells, suggesting that Smc1 and Smc3 head domains are in direct contact with each other and also with Mcd1/Scc1. Thus, cohesin complexes may be much more compact than commonly portrayed. We further demonstrate that mutation in ELG1 or RFC5 anti-establishment genes suppress tag-induced lethality, consistent with the notion that the replication fork regulates Ctf7/Eco1.
authors: Department of Biological Sciences, Lehigh University, Bethlehem, PA 18015, USA.
authors: Marie E
authors: ME
authors: Maradeo
authors: Robert V
authors: RV
authors: Skibbens
mesh_terms: D000107:Acetylation; D000123:Acetyltransferases / Q000235:genetics / Q000378:metabolism*; D002352:Carrier Proteins / Q000235:genetics; D018797:Cell Cycle Proteins / Q000737:chemistry / Q000378:metabolism*; D002868:Chromosomal Proteins, Non-Histone / Q000737:chemistry / Q000378:metabolism*; D009687:Nuclear Proteins / Q000235:genetics / Q000378:metabolism*; D011487:Protein Conformation; D025941:Protein Interaction Mapping / Q000379:methods*; D055503:Protein Multimerization; D012441:Saccharomyces cerevisiae / Q000235:genetics / Q000378:metabolism*; D029701:Saccharomyces cerevisiae Proteins / Q000235:genetics / Q000378:metabolism*; D000097722:Cohesins; D000098550:Structural Maintenance of Chromosome Protein 1
chemical_list: D000123:Acetyltransferases; D002352:Carrier Proteins; D018797:Cell Cycle Proteins; D002868:Chromosomal Proteins, Non-Histone; D009687:Nuclear Proteins; D029701:Saccharomyces cerevisiae Proteins; D000097722:Cohesins; D000098550:Structural Maintenance of Chromosome Protein 1; C477609:Elg1 protein, S cerevisiae; C119635:IRR1 protein, S cerevisiae; C490529:MCD1 protein, S cerevisiae; C118076:ECO1 protein, S cerevisiae