RSA3 / YLR221C Overview


Standard Name
RSA3 1
Systematic Name
YLR221C
SGD ID
SGD:S000004211
Feature Type
ORF , Verified
Description
Protein with a likely role in ribosomal maturation; required for accumulation of wild-type levels of large (60S) ribosomal subunits; binds to the helicase Dbp6p in pre-60S ribosomal particles in the nucleolus 1
Name Description
RiboSome Assembly 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
RSA3/YLR221C is located near the middle of the right arm of chromosome XII between CCC1 vacuolar Fe2+/Mn2+ transporter and nucleolar protein UTP13; coding sequence is 663 nucleotides long with 6 SNPs, 4 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
Rsa3p is 220 amino acids long, shorter-lived, low in abundance; contains disordered region in N-terminus; ubiquitinylated on K12, acetylated on K113, phosphorylated on 9 residues
AlphaFold predicted structure of RSA3
Length (a.a.)
220
Mol. Weight (Da)
24642.5
Isoelectric Point
4.51
Median Abundance (molecules/cell)
4441 +/- 626
Half-life (hr)
8.9

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 RSA3 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
Subunit of precursor preribosome involved in ribosomal large subunit assembly; localizes to nucleolus

View computational annotations

Molecular Function

Manually Curated

Biological Process

Manually Curated

Cellular Component

Manually Curated
High-Throughput

Complex

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

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
RSA3/YLR221C is a non-essential gene in reference strain S288C; null mutants are viable but display decreased anaerobic growth, decreased biofilm formation, increased heat sensitivity, abnormal nuclear morphology, increased nucleolar size, abnormal vacuolar morphology, decreased competitive fitness, and increased chronological and replicative lifespan. Overexpression of RSA3 results in decreased heat sensitivity, increased osmotic stress resistance, and increased oxidative stress resistance.
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
Rsa3p interacts physically with proteins involved in rRNA processing and large ribosomal subunit biogenesis; RSA3 interacts genetically with genes involved in rRNA processing and large ribosomal subunit biogenesis

235 total interactions for 151 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
RSA3/YLR221C transcription is positively regulated by Znf1p during D-xylose fermentation, regulated by Fkh1p, Rfx1p, and Stp1p in response to heat, and regulated 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.


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: 2026-08-24

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