ECM22 / YLR228C Overview

Standard Name
ECM22 1
Systematic Name
Feature Type
ORF , Verified
Sterol regulatory element binding protein; regulates transcription of sterol biosynthetic genes upon sterol depletion, after relocating from intracellular membranes to perinuclear foci; redundant activator of filamentation with UPC2, up-regulating the expression of genes involved in filamentous growth; contains Zn[2]-Cys[6] binuclear cluster; ECM22 has a paralog, UPC2, that arose from the whole genome duplication 2 3 4 5 6 7
Name Description
ExtraCellular Mutant
UPC2 5
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.

ECM22 has a paralog, UPC2, that arose from the whole genome duplication
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)
669 +/- 590


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 ECM22 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.

DNA binding RNA polymerase transcription activator involved in positive regulation of transcription by RNA polymerase II; localizes to nucleus and perinuclear region of cytoplasm

View computational annotations

Cellular Component

Manually Curated
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.

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.

The ecm22 null mutant is viable; the null mutant of paralog upc2 is viable; the ecm22 upc2 double mutant shows increased sensitivity to lovastatin, decreased sensitivity to amphotericin, and complete loss of Set4p production.

139 total interactions for 115 unique genes

Physical Interactions

  • Affinity Capture-MS: 10
  • Affinity Capture-RNA: 6
  • Affinity Capture-Western: 1
  • Biochemical Activity: 2
  • Co-localization: 1
  • Two-hybrid: 1

Genetic Interactions

  • Dosage Growth Defect: 2
  • Dosage Lethality: 4
  • Negative Genetic: 76
  • Phenotypic Enhancement: 5
  • Phenotypic Suppression: 2
  • Positive Genetic: 12
  • Synthetic Growth Defect: 5
  • Synthetic Lethality: 10
  • Synthetic Rescue: 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.

ECM22 encodes a transcription factor that is a member of the C6 zinc finger class, containing a DNA binding domain also known as the Zn2Cys6 binuclear zinc cluster or zinc knuckle. Ecm22p and Upc2p, the products of paralogous genes, have similar functions. They recognize and bind to sterol regulatory elements (SRE) in the promoters of genes involved in ergosterol biosynthesis, such as ERG1, ERG2, ERG3, ERG7, ERG25, ERG26, and ERG27, upregulating their transcription at low sterol levels. Under hypoxic conditions, both Ecm22p and Upc2p also activate transcription of the DAN/TIR genes encoding cell wall mannoproteins. Under sterol-replete conditions, Ecm22p and Upc2p localize to intracellular membranes. When sterol concentrations are low, both transcription factors relocate to the nucleus to activate ergosterol biosynthetic gene transcription. By analogy to sterol biosynthesis regulators in other organisms, it is likely that Ecm22p and Upc2p are processed during this relocation, such that the C-terminal transmembrane domain remains in the membrane while the N-terminal DNA-binding domain enters the nucleus.
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.

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.