ILV3 / YJR016C Overview


Standard Name
ILV3 1
Systematic Name
YJR016C
SGD ID
SGD:S000003777
Feature Type
ORF , Verified
EC Number
4.2.1.9
Description
Dihydroxyacid dehydratase; putative 2Fe-2S protein; catalyzes third step in the common pathway leading to biosynthesis of branched-chain amino acids 1 2
Name Description
IsoLeucine-plus-Valine requiring
Comparative Info
Sequence Details

Sequence

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.


Summary
ILV3/YJR016C is located on the right arm of chromosome X; coding sequence is 1758 nucleotides long with 8 SNPs, 2 of which cause amino acid polymorphisms
Protein Details

Protein

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.


Summary
Ilv3p is 585 amino acids long, moderate in abundance, longer-lived; monoacetylated on 8 residues, succinylated on 16 residues, phosphorylated on 21 residues.
AlphaFold predicted structure of ILV3
EC Number
4.2.1.9
Length (a.a.)
585
Mol. Weight (Da)
62863.9
Isoelectric Point
7.92
Median Abundance (molecules/cell)
41540 +/- 24019
Half-life (hr)
11.7

Alleles

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.


View all ILV3 alleles in SGD search

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.


Summary
Mitochondrial dihydroxy-acid dehydratase; involved in branched-chain amino acid biosynthesis

View computational annotations

Molecular Function

Manually Curated

Biological Process

Manually Curated

Cellular Component

Manually Curated
High-Throughput

Metabolic Pathways

Metabolic Pathways annotations describe biochemical pathways involving this gene product in small molecule metabolism. These annotations connect gene products to specific metabolic reactions, substrates, and products within larger metabolic networks. Metabolic pathway data is curated from published scientific literature. Click the links to see detailed pathway diagrams on SGD's YeastPathways site for further exploration.


Phenotype Details

Phenotype

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.


Summary
ILV3/YJR016C is an essential gene in reference strain S288C; null mutants are inviable. Reduction-of-function alleles exhibit increased competitive fitness, while overexpression reduces competitive fitness.
Interaction Details

Interaction

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.


Summary
Ilv3p interacts physically with proteins involved in cellular respiration; ILV3 interacts genetically with genes involved in stress response and transcription

250 total interactions for 222 unique genes

Regulation Details

Regulation

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.


Summary
ILV3/YJR016C transcription is positively regulated by Gcn4p in response to boron and methionine, negatively regulated by Ixr1p in response to hypoxia, and regulated by Fkh1p in response to heat, Yap1p in response to hydrogen peroxide, and Sfp1p in response to stress.
Expression Details

Expression

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: 2026-02-26

Literature Details

All Curated Literature

All manually curated literature for the specified gene, shown as a count of references by year of publication followed by the most recent papers. Click "Literature Details" or "See all" to view all literature information for this locus, organized into topics according to their relevance to the gene (Primary Literature, Additional Literature, or Review).


Loading literature…

Resources