ABF1 / YKL112W Overview

Standard Name
ABF1 1
Systematic Name
SBF1 , GFI 35 , BAF1 10 , OBF1 36 , REB2 37 , SBF-B 38 39 , EBF2 28
Feature Type
ORF , Verified
DNA binding protein with possible chromatin-reorganizing activity; involved in transcriptional activation, gene silencing, and DNA replication and repair 2 3 4
Name Description
ARS-Binding Factor 1
Comparative Info
Sequence Details


The S. cerevisiae Reference Genome sequence is derived from laboratory strain S288C. Download DNA or protein sequence, view genomic context and coordinates. Click "Sequence Details" to view all sequence information for this locus, including that for other strains.

Protein Details


Basic sequence-derived (length, molecular weight, isoelectric point) and experimentally-determined (median abundance, median absolute deviation) protein information. Click "Protein Details" for further information about the protein such as half-life, abundance, domains, domains shared with other proteins, protein sequence retrieval for various strains, physico-chemical properties, protein modification sites, and external identifiers for the protein.

Length (a.a.)
Mol. Weight (Da)
Isoelectric Point
Median Abundance (molecules/cell)
6206 +/- 1386
Half-life (hr)


Curated mutant alleles for the specified gene, listed alphabetically. Click on the allele name to open the allele page. Click "SGD search" to view all alleles in search results. Click "YeastMine" to view all alleles in YeastMine.

View all ABF1 alleles in SGD search | YeastMine

Gene Ontology Details

Gene Ontology

GO Annotations consist of four mandatory components: a gene product, a term from one of the three Gene Ontology (GO) controlled vocabularies (Molecular Function, Biological Process, and Cellular Component), a reference, and an evidence code. SGD has manually curated and high-throughput GO Annotations, both derived from the literature, as well as computational, or predicted, annotations. Click "Gene Ontology Details" to view all GO information and evidence for this locus as well as biological processes it shares with other genes.

Sequence specific DNA-binding RNA polymerase II transcription factor; involved in chromatin silencing and remodeling; binds replication origins and is involved in DNA replication; subunit of nucleotide-excision repair factor 4 complex

View computational annotations

Cellular Component

Manually Curated


Macromolecular complex annotations are imported from the Complex Portal. These annotations have been derived from physical molecular interaction evidence extracted from the literature and cross-referenced in the entry, or by curator inference from information on homologs in closely related species or by inference from scientific background.

Phenotype Details


Phenotype annotations for a gene are curated single mutant phenotypes that require an observable (e.g., "cell shape"), a qualifier (e.g., "abnormal"), a mutant type (e.g., null), strain background, and a reference. In addition, annotations are classified as classical genetics or high-throughput (e.g., large scale survey, systematic mutation set). Whenever possible, allele information and additional details are provided. Click "Phenotype Details" to view all phenotype annotations and evidence for this locus as well as phenotypes it shares with other genes.

Essential gene; overexpression variously reported to cause sensitivity to nocodazol, decreased growth rate, or lethality; conditional mutants show delayed progression through G2 phase
Interaction Details


Interaction annotations are curated by BioGRID and include physical or genetic interactions observed between at least two genes. An interaction annotation is composed of the interaction type, name of the interactor, assay type (e.g., Two-Hybrid), annotation type (e.g., manual or high-throughput), and a reference, as well as other experimental details. Click "Interaction Details" to view all interaction annotations and evidence for this locus, including an interaction visualization.

477 total interactions for 410 unique genes

Physical Interactions

  • Affinity Capture-MS: 23
  • Affinity Capture-RNA: 9
  • Biochemical Activity: 1
  • Co-fractionation: 2
  • Co-localization: 1
  • Reconstituted Complex: 7

Genetic Interactions

  • Dosage Rescue: 4
  • Negative Genetic: 351
  • Positive Genetic: 77
  • Synthetic Lethality: 2
Regulation Details


The number of putative Regulators (genes that regulate it) and Targets (genes it regulates) for the given locus, based on experimental evidence. This evidence includes data generated through high-throughput techniques. Click "Regulation Details" to view all regulation annotations, shared GO enrichment among regulation Targets, and a regulator/target diagram for the locus.

ABF1 encodes a zinc finger transcription factor that binds the consensus site, 5'-TnnCGTnnnnnnTGAT-3', which is found at various locations throughout the genome including at the silent mating type loci, ARSs, telomeres, and the promoter regions of many genes. Abf1p binding to these sites directly mediates a number of different events in addition to chromatin remodeling and transcriptional regulation such as DNA replication, silencing, and nucleotide excision repair. Abf1p regulates transcription of over 80 genes involved in a diverse range of cellular processes such as sugar and carbohydrate metabolism (ex. ADH1, CDC19, PGK1, ENO1, ENO2), nitrogen utilization (ex. CAR1, CAR2), ascospore formation (ex. SPR3), meiosis (ex. HOP1), ribosomal function (ex. RPL2A, RPL2B), and cellular respiration (ex. COX6). Abf1p contains a bipartite N-terminal DNA-binding domain and a C-terminal activation domain, which is responsible for mediating nuclear localization and chromatin remodeling. Abf1p binding appears to be constitutive and is stimulated by DNA replication protein Cdc6p. Abf1p can repress its own transcription through binding to its own promoter. Abf1p contains multiple phosphorylation sites, with the extent of Abf1p phosphorylation varying in different growth conditions, and regulating its activity.
Expression Details


Expression data are derived from records contained in the Gene Expression Omnibus (GEO), and are first log2 transformed and normalized. Referenced datasets may contain one or more condition(s), and as a result there may be a greater number of conditions than datasets represented in a single clickable histogram bar. The histogram division at 0.0 separates the down-regulated (green) conditions and datasets from those that are up-regulated (red). Click "Expression Details" to view all expression annotations and details for this locus, including a visualization of genes that share a similar expression pattern.

Summary Paragraph

A summary of the locus, written by SGD Biocurators following a thorough review of the literature. Links to gene names and curated GO terms are included within the Summary Paragraphs.

Last Updated: 2005-10-19

Literature Details


All manually curated literature for the specified gene, organized into topics according to their relevance to the gene (Primary Literature, Additional Literature, or Review). Click "Literature Details" to view all literature information for this locus, including shared literature between genes.