title: The ATM-related cofactor Tra1 is a component of the purified SAGA complex.
abstract: The SAGA histone acetyltransferase/transcriptional adaptor complex is composed of multiple transcriptional regulators including Ada, Spt, and TAFII proteins. Here we identify an additional novel subunit of the complex, Tra1, an ATM/PI-3-kinase-related homolog of the human TRRAP cofactor, which is essential for c-Myc and E2F-mediated oncogenic transformation. Mass spectrometry, immunoblotting, and immunoprecipitation experiments confirm the stable association of this protein within SAGA. In addition, the Tra1 protein is a component of at least two other histone acetyltransferase protein complexes. These results indicate a role for Tra1 in the regulation of transcriptional activation through the recruitment of HAT activity to an activator-bound promoter.
authors.affiliation: Howard Hughes Medical Institute, Pennsylvania State University, University Park 16802-4500, USA. pag9@psu.edu
authors.forename: P A
authors.initials: PA
authors.lastname: Grant
authors.forename: D
authors.initials: D
authors.lastname: Schieltz
authors.forename: M G
authors.initials: MG
authors.lastname: Pray-Grant
authors.forename: J R
authors.initials: JR
authors.lastname: Yates
authors.forename: J L
authors.initials: JL
authors.lastname: Workman
mesh_terms: D000123:Acetyltransferases / Q000378:metabolism*; D000595:Amino Acid Sequence; D064007:Ataxia Telangiectasia Mutated Proteins; D018797:Cell Cycle Proteins; D004268:DNA-Binding Proteins; D004591:Electrophoresis, Polyacrylamide Gel; D005656:Fungal Proteins / Q000502:physiology; D051548:Histone Acetyltransferases; D015151:Immunoblotting; D008969:Molecular Sequence Data; D009097:Multienzyme Complexes / Q000737:chemistry / Q000302:isolation & purification / Q000378:metabolism; D011494:Protein Kinases / Q000502:physiology; D017346:Protein Serine-Threonine Kinases; D011506:Proteins / Q000032:analysis* / Q000378:metabolism*; D012441:Saccharomyces cerevisiae / Q000737:chemistry / Q000201:enzymology; D029701:Saccharomyces cerevisiae Proteins; D025521:Tumor Suppressor Proteins
chemical_list: D018797:Cell Cycle Proteins; D004268:DNA-Binding Proteins; D005656:Fungal Proteins; D009097:Multienzyme Complexes; D011506:Proteins; D029701:Saccharomyces cerevisiae Proteins; C491364:TRA1 protein, S cerevisiae; D025521:Tumor Suppressor Proteins; D000123:Acetyltransferases; D051548:Histone Acetyltransferases; D011494:Protein Kinases; C576324:ATM protein, human; D064007:Ataxia Telangiectasia Mutated Proteins; D017346:Protein Serine-Threonine Kinases