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

Last Reviewed on: 2001-01-19    Molecular Function | Biological Process | Cellular Component

Manually curated Molecular Function
Annotation(s)	Evidence	Reference(s)	Assigned By
sterol 24-C-methyltransferase activity	IDA: Inferred from Direct Assay Assigned on 2008-07-18	Jayasimha P and Nes WD  (2008) Photoaffinity Labeling and Mutational Analysis of 24-C-Sterol Methyltransferase Defines the AdoMet Binding Site. Lipids 43(8):681-93	SGD

Manually curated Biological Process
Annotation(s)	Evidence	Reference(s)	Assigned By
ergosterol biosynthetic process	IMP: Inferred from Mutant Phenotype Assigned on 2013-03-15	Gaber RF, et al.  (1989) The yeast gene ERG6 is required for normal membrane function but is not essential for biosynthesis of the cell-cycle-sparking sterol. Mol Cell Biol 9(8):3447-56	SGD
	IMP: Inferred from Mutant Phenotype Assigned on 2013-03-15	McCammon MT, et al.  (1984) Sterol methylation in Saccharomyces cerevisiae. J Bacteriol 157(2):475-83	SGD

Manually curated Cellular Component
Annotation(s)	Evidence	Reference(s)	Assigned By
endoplasmic reticulum	IDA: Inferred from Direct Assay Assigned on 2013-03-15	Pichler H, et al.  (2001) A subfraction of the yeast endoplasmic reticulum associates with the plasma membrane and has a high capacity to synthesize lipids. Eur J Biochem 268(8):2351-61	SGD
	IDA: Inferred from Direct Assay Assigned on 2013-03-15	Leber R, et al.  (1998) Dual localization of squalene epoxidase, Erg1p, in yeast reflects a relationship between the endoplasmic reticulum and lipid particles. Mol Biol Cell 9(2):375-86	SGD
lipid particle	IDA: Inferred from Direct Assay Assigned on 2001-01-18	Athenstaedt K, et al.  (1999) Identification and characterization of major lipid particle proteins of the yeast Saccharomyces cerevisiae. J Bacteriol 181(20):6441-8	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.

Cellular Component

High-throughput Cellular Component
Annotation(s)	Evidence	Reference(s)	Assigned By
mitochondrial outer membrane	IDA: Inferred from Direct Assay Assigned on 2006-03-17	Zahedi RP, et al.  (2006) Proteomic analysis of the yeast mitochondrial outer membrane reveals accumulation of a subclass of preproteins. Mol Biol Cell 17(3):1436-50	SGD
mitochondrion	IDA: Inferred from Direct Assay Assigned on 2006-12-12	Reinders J, et al.  (2006) Toward the complete yeast mitochondrial proteome: multidimensional separation techniques for mitochondrial proteomics. J Proteome Res 5(7):1543-54	SGD
	IDA: Inferred from Direct Assay Assigned on 2004-09-28	Sickmann A, et al.  (2003) The proteome of Saccharomyces cerevisiae mitochondria. Proc Natl Acad Sci U S A 100(23):13207-12	SGD

** 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

Computational Molecular Function
Annotation(s)	Evidence	Reference(s)	Assigned By
methyltransferase activity	IEA: Inferred from Electronic Annotation with EBI:IPR013705, EBI:IPR013216 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-0489 Last updated 2013-03-02	UniProt-GOA  (2011) Gene Ontology annotation based on manual assignment of UniProtKB keywords in UniProtKB/Swiss-Prot entries.	UniProtKB
sterol 24-C-methyltransferase activity	IEA: Inferred from Electronic Annotation with EBI:IPR025810 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 IUBMB:2.1.1.41 Last updated 2013-03-02	GOA curators and MGI curators  (2001) Gene Ontology annotation based on Enzyme Commission mapping.	UniProtKB
transferase activity	IEA: Inferred from Electronic Annotation with EBI:KW-0808 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 Biological Process
Annotation(s)	Evidence	Reference(s)	Assigned By
lipid metabolic process	IEA: Inferred from Electronic Annotation with EBI:KW-0443 Last updated 2013-03-02	UniProt-GOA  (2011) Gene Ontology annotation based on manual assignment of UniProtKB keywords in UniProtKB/Swiss-Prot entries.	UniProtKB
metabolic process	IEA: Inferred from Electronic Annotation with EBI:IPR013216 Last updated 2013-03-02	DDB, et al.  (2001) Gene Ontology annotation through association of InterPro records with GO terms.	InterPro
methylation	IEA: Inferred from Electronic Annotation with EBI:KW-0489 Last updated 2013-03-02	UniProt-GOA  (2011) Gene Ontology annotation based on manual assignment of UniProtKB keywords in UniProtKB/Swiss-Prot entries.	UniProtKB
steroid biosynthetic process	IEA: Inferred from Electronic Annotation with EBI:IPR013705 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-0752 Last updated 2013-03-02	UniProt-GOA  (2011) Gene Ontology annotation based on manual assignment of UniProtKB keywords in UniProtKB/Swiss-Prot entries.	UniProtKB
steroid metabolic process	IEA: Inferred from Electronic Annotation with EBI:KW-0753 Last updated 2013-03-02	UniProt-GOA  (2011) Gene Ontology annotation based on manual assignment of UniProtKB keywords in UniProtKB/Swiss-Prot entries.	UniProtKB
sterol biosynthetic process	IEA: Inferred from Electronic Annotation with UniPathway:UPA00768 Last updated 2013-03-02	UniProt-GOA  (2012) Gene Ontology annotation based on UniPathway vocabulary mapping.	UniPathway
	IEA: Inferred from Electronic Annotation with EBI:KW-0756 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)).