SGD Paper Help


Page Contents:
Turner SD, et al.  (2002) The E2 ubiquitin conjugase Rad6 is required for the ArgR/Mcm1 repression of ARG1 transcription. Mol Cell Biol 22(12):4011-9

Abstract: Transcription of the Saccharomyces cerevisiae ARG1 gene is under the control of both positive and negative elements. Activation of the gene in minimal medium is induced by Gcn4. Repression occurs in the presence of arginine and requires the ArgR/Mcm1 complex that binds to two upstream arginine control (ARC) elements. With the recent finding that the E2 ubiquitin conjugase Rad6 modifies histone H2B, we examined the role of Rad6 in the regulation of ARG1 transcription. We find that Rad6 is required for repression of ARG1 in rich medium, with expression increased approximately 10-fold in a rad6 null background. Chromatin immunoprecipitation analysis indicates increased binding of TATA-binding protein in the absence of Rad6. The active-site cysteine of Rad6 is required for repression, implicating ubiquitination in the process. The effects of Rad6 at ARG1 involve two components. In one of these, histone H2B is the likely target for ubiquitination by Rad6, since a strain expressing histone H2B with the principal ubiquitination site converted from lysine to arginine shows a fivefold relief of repression. The second component requires Ubr1 and thus likely the pathway of N-end rule degradation. Through the analysis of promoter constructs with ARC deleted and an arg80 rad6 double mutant, we show that Rad6 repression is mediated through the ArgR/Mcm1 complex. In addition, analysis of an ada2 rad6 deletion strain indicated that the SAGA acetyltransferase complex and Rad6 act in the same pathway to repress ARG1 in rich medium.

Status: Published Type: Journal Article PubMed ID: 12024015

Topics addressed in this paper

Number of different genes curated to this paper: 9

  • To find other papers on a gene and topic, click on the colored ball in the appropriate box.
  • displays other papers with information about that topic for that gene.
  • displays other papers in SGD that are associated with that topic.
    The topic is addressed in these papers but does not describe a specific gene or chromosomal feature.
  • To go to the Locus page for a gene, click on the gene name.
Topics Genes linked to topics
ADA2 ARG1 ARG80 ARG81 ARG82 GCN4 MCM1 RAD6 UBR1
Additional Literature blue ball blue ball blue ball
Function/Process blue ball blue ball blue ball blue ball blue ball blue ball blue ball
Genetic Interactions blue ball blue ball blue ball blue ball
Mutants/Phenotypes blue ball blue ball blue ball blue ball
Primary Literature blue ball blue ball blue ball blue ball blue ball blue ball
Protein Sequence Features blue ball
Protein-protein Interactions blue ball blue ball blue ball blue ball
Regulation of blue ball
Regulatory Role blue ball blue ball blue ball blue ball blue ball
Strains/Constructs blue ball blue ball blue ball blue ball
Substrates/Ligands/Cofactors blue ball blue ball
Transcription blue ball

Author Searches

To find contact information or other publications by the authors of this paper, follow these three steps:
  1. (1) Choose an author,
  2. (2) Choose a search parameter,
  3. (3) Click to implement
Page Contents: