SDH2 / YLL041C

Locus Overview

Standard Name
SDH2 1
Systematic Name
ACN17 , SDHB 2
Feature Type
ORF , Verified
Iron-sulfur protein subunit of succinate dehydrogenase; the complex couples the oxidation of succinate to the transfer of electrons to ubiquinone as part of the TCA cycle and the mitochondrial respiratory chain; other members are Sdh1p, Sdh3p, and Sdh4p 3
Name Description
Succinate DeHydrogenase 1
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 information about the protein. Click "Protein Details" for further information about the protein such as abundance data, domains, shared domains with other proteins, protein sequence retrieval for various strains, sequence-based physico-chemical proterties, protein modification sites sites, and external identifiers for the protein.

Length (a.a.)
Mol. Weight (Da)
Isoelectric Point
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.

Succinate dehydrogenase subunit of the mitochondrial respiratory chain complex; involved in cellular respiration, the tricarboxylic acid cycle, and mitochondrial electron transport; localizes to vacuolar and mitochondrial membranes

View computational annotations

Molecular Function

Manually Curated

Biological Process

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.

Non-essential gene; null mutant fails to grow on nonfermentable carbon sources but respiratory defect is rescued by the addition of FAD; null mutant loses viability in stationary phase faster than wild type does, but is resistant to sugar-induced cell death; disease-analogous mutation from a mitochondrial disorder patient reduced Sdh2p activity; in large-scale studies, the null mutant displays increased competitive fitness in minimal medium but decreased competitive fitness in several other media; null mutant is sensitive to desiccation, displays poor growth in anoxic conditions, and has shorter chronological lifespan
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.

65 total interactions for 51 unique genes

Physical Interactions

  • Affinity Capture-MS: 4
  • Affinity Capture-RNA: 3
  • Affinity Capture-Western: 3
  • Reconstituted Complex: 1

Genetic Interactions

  • Negative Genetic: 36
  • Phenotypic Suppression: 4
  • Positive Genetic: 12
  • Synthetic Growth Defect: 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.

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.