SAG1 / YJR004C Overview


Standard Name
SAG1 1
Systematic Name
YJR004C
SGD ID
SGD:S000003764
Aliases
AG(ALPHA)1 1
Feature Type
ORF , Verified
Description
Alpha-agglutinin of alpha-cells; binds to Aga1p during agglutination, N-terminal half is homologous to the immunoglobulin superfamily and contains binding site for a-agglutinin, C-terminal half is highly glycosylated and contains GPI anchor 2 3 4
Name Description
Sexual AGglutination 1
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
SAG1/YJR004C is located on the right arm of chromosome X between ARS ARS1015 and beta-adaptin APL1; coding sequence is 1953 nucleotides long with 6 synonymous and 8 nonsynonymous SNPs
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
Sag1p is 650 amino acids long, low in abundance and short-lived; N-glycosylated on N79
AlphaFold predicted structure of SAG1
Length (a.a.)
650
Mol. Weight (Da)
70307.8
Isoelectric Point
4.14
Median Abundance (molecules/cell)
2895 +/- 1220
Half-life (hr)
2.9

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 SAG1 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
Agglutinin that adheres cells during mating and conjugation

View computational annotations

Molecular Function

Manually Curated

Biological Process

Manually Curated

Cellular Component

Manually Curated
High-Throughput
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
Non-essential gene in reference strain S288C; null mutant has abnormal actin cytoskeleton with delocalized actin patches, smaller cell and bud size, and smaller nucleus; absent respiratory growth and decreased chronological lifespan; impaired growth under sulfur limitation and with lignocellulosic hydrolysate; decreased allantoin utilization; reduced lipid droplet numbers; decreased resistance to palmitoleate, cordycepin, and octanoic acid but increased oxidative stress resistance; is haploproficient; in W303, null mutant fails to agglutinate in response to mating pheromone; in unidentified strains, shows abnormal or absent mating agglutination response
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
Sag1p interacts physically with proteins involved in regulation of cell cycle; SAG1 interacts genetically with genes involved in transcription by RNA polymerase II

39 total interactions for 39 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
SAG1/YJR004C transcription is regulated by Fkh1p and Rpd3p in response to heat, and by 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.


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).


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Resources