This page displays GO annotations in different sections according to the annotation method used to add that annotation to SGD.

Last Reviewed on: 2008-10-14    Molecular Function | Biological Process | Cellular Component

Manually curated Molecular Function
Annotation(s)	Evidence	Reference(s)	Assigned By
structural constituent of ribosome	IDA: Inferred from Direct Assay Assigned on 2008-10-14	Yeh YC, et al.  (1986) Protein topography of the 40 S ribosomal subunit from Saccharomyces cerevisiae as shown by chemical cross-linking. J Biol Chem 261(30):14148-53	SGD

Manually curated Biological Process
Annotation(s)	Evidence	Reference(s)	Assigned By
cytoplasmic translation	IC: Inferred By Curator from cytosolic small ribosomal subunit Assigned on 2008-10-14	Yeh YC, et al.  (1986) Protein topography of the 40 S ribosomal subunit from Saccharomyces cerevisiae as shown by chemical cross-linking. J Biol Chem 261(30):14148-53	SGD
endonucleolytic cleavage in ITS1 to separate SSU-rRNA from 5.8S rRNA and LSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA)	IMP: Inferred from Mutant Phenotype Assigned on 2008-10-14	Tabb-Massey A, et al.  (2003) Ribosomal proteins Rps0 and Rps21 of Saccharomyces cerevisiae have overlapping functions in the maturation of the 3' end of 18S rRNA. Nucleic Acids Res 31(23):6798-805	SGD
endonucleolytic cleavage to generate mature 3'-end of SSU-rRNA from (SSU-rRNA, 5.8S rRNA, LSU-rRNA)	IMP: Inferred from Mutant Phenotype Assigned on 2008-10-14	Tabb-Massey A, et al.  (2003) Ribosomal proteins Rps0 and Rps21 of Saccharomyces cerevisiae have overlapping functions in the maturation of the 3' end of 18S rRNA. Nucleic Acids Res 31(23):6798-805	SGD

Manually curated Cellular Component
Annotation(s)	Evidence	Reference(s)	Assigned By
cytosolic small ribosomal subunit	IDA: Inferred from Direct Assay Assigned on 2008-10-14	Yeh YC, et al.  (1986) Protein topography of the 40 S ribosomal subunit from Saccharomyces cerevisiae as shown by chemical cross-linking. J Biol Chem 261(30):14148-53	SGD

* Manually curated GO annotations reflect our best understanding of the basic molecular function, biological process, and cellular component for this gene product. Manually curated annotations are assigned by SGD curators based on published papers when available, or by curatorial statements if necessary. Curators periodically review all Manually curated GO annotations for accuracy and completeness. The "Last Reviewed on:" date at the top of this section indicates when these annotations were last reviewed.

There are no High-throughput annotations for RPS21A

** GO annotations from High-throughput experiments are made based on a variety of large scale high-throughput experiments, including genome-wide experiments. Many of these annotations are made based on GO annotations (or mappings to GO annotations) assigned by the authors, rather than SGD curators. While SGD curators read these publications and often work closely with authors to incorporate the information, each individual annotation may not necessarily be reviewed by a curator. GO Annotations from high-throughput experiments will be assigned only when this type of data is available, and thus may not be assigned in all three aspects of the Gene Ontologies.

Molecular Function | Biological Process | Cellular Component

Computational Molecular Function
Annotation(s)	Evidence	Reference(s)	Assigned By
structural constituent of ribosome	IEA: Inferred from Electronic Annotation with EBI:IPR018279, EBI:IPR001931 Last updated 2013-03-02	DDB, et al.  (2001) Gene Ontology annotation through association of InterPro records with GO terms.	InterPro

Computational Biological Process
Annotation(s)	Evidence	Reference(s)	Assigned By
ribosomal small subunit biogenesis	IBA: Inferred from Biological Aspect of Ancestor with PANTHER:PTHR10442_AN0 Last updated 2011-10-06	Gaudet P, et al.  (2011) Annotation inferences using phylogenetic trees.	RefGenome
rRNA processing	IEA: Inferred from Electronic Annotation with EBI:KW-0698 Last updated 2013-03-02	UniProt-GOA  (2011) Gene Ontology annotation based on manual assignment of UniProtKB keywords in UniProtKB/Swiss-Prot entries.	UniProtKB
translation	IEA: Inferred from Electronic Annotation with EBI:IPR018279, EBI:IPR001931 Last updated 2013-03-02	DDB, et al.  (2001) Gene Ontology annotation through association of InterPro records with GO terms.	InterPro
translational elongation	IBA: Inferred from Biological Aspect of Ancestor with PANTHER:PTHR10442_AN0 Last updated 2011-10-06	Gaudet P, et al.  (2011) Annotation inferences using phylogenetic trees.	RefGenome

Computational Cellular Component
Annotation(s)	Evidence	Reference(s)	Assigned By
cytoplasm	IEA: Inferred from Electronic Annotation with EBI:SL-0086 Last updated 2013-03-02	UniProt-GOA  (2011) Gene Ontology annotation based on the manual assignment of UniProtKB Subcellular Location terms in UniProtKB/Swiss-Prot entries.	UniProtKB
	IEA: Inferred from Electronic Annotation with EBI:KW-0963 Last updated 2013-03-02	UniProt-GOA  (2011) Gene Ontology annotation based on manual assignment of UniProtKB keywords in UniProtKB/Swiss-Prot entries.	UniProtKB
intracellular	IEA: Inferred from Electronic Annotation with EBI:IPR018279, EBI:IPR001931 Last updated 2013-03-02	DDB, et al.  (2001) Gene Ontology annotation through association of InterPro records with GO terms.	InterPro
ribonucleoprotein complex	IEA: Inferred from Electronic Annotation with EBI:KW-0687 Last updated 2013-03-02	UniProt-GOA  (2011) Gene Ontology annotation based on manual assignment of UniProtKB keywords in UniProtKB/Swiss-Prot entries.	UniProtKB
ribosome	IEA: Inferred from Electronic Annotation with EBI:IPR018279, EBI:IPR001931 Last updated 2013-03-02	DDB, et al.  (2001) Gene Ontology annotation through association of InterPro records with GO terms.	InterPro
	IEA: Inferred from Electronic Annotation with EBI:KW-0689 Last updated 2013-03-02	UniProt-GOA  (2011) Gene Ontology annotation based on manual assignment of UniProtKB keywords in UniProtKB/Swiss-Prot entries.	UniProtKB

*** Computational GO Annotations are predictions. These annotations are NOT reviewed by a curator. Currently, all computational GO annotations for S. cerevisiae are assigned by an external source (for example, the Gene Ontology Annotation (GOA) project of the European Bioinformatics Institute (EBI)).