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

Last Reviewed on: 2012-08-14    Molecular Function | Biological Process

Manually curated Molecular Function
Annotation(s)	Evidence	Reference(s)	Assigned By
homoserine O-acetyltransferase activity	IMP: Inferred from Mutant Phenotype Assigned on 2012-08-14 IDA: Inferred from Direct Assay Assigned on 2012-08-14	Yamagata S  (1987) Partial purification and some properties of homoserine O-acetyltransferase of a methionine auxotroph of Saccharomyces cerevisiae. J Bacteriol 169(8):3458-63	SGD

Manually curated Biological Process
Annotation(s)	Evidence	Reference(s)	Assigned By
homoserine metabolic process	IMP: Inferred from Mutant Phenotype Assigned on 2012-08-14 IDA: Inferred from Direct Assay Assigned on 2012-08-14	Yamagata S  (1987) Partial purification and some properties of homoserine O-acetyltransferase of a methionine auxotroph of Saccharomyces cerevisiae. J Bacteriol 169(8):3458-63	SGD
methionine biosynthetic process	IMP: Inferred from Mutant Phenotype Assigned on 2012-08-14	Robichon-Szulmajster H and Cherest H  (1967) Regulation of homoserine O-transacetylase, first step in methionine biosyntheis in Saccharomyces cerevisiae. Biochem Biophys Res Commun 28(2):256-62	SGD
sulfur amino acid metabolic process	IMP: Inferred from Mutant Phenotype Assigned on 2012-08-14	Masselot M and De Robichon-Szulmajster H  (1975) Methionine biosynthesis in Saccharomyces cerevisiae. I. Genetical analysis of auxotrophic mutants. Mol Gen Genet 139(2):121-32	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
cytoplasm	IDA: Inferred from Direct Assay Assigned on 2002-05-07	Kumar A, et al.  (2002) Subcellular localization of the yeast proteome. Genes Dev 16(6):707-19	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 | Cellular Component

Computational Molecular Function
Annotation(s)	Evidence	Reference(s)	Assigned By
homoserine O-acetyltransferase activity	IEA: Inferred from Electronic Annotation with EBI:IPR008220 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:2.3.1.31 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
transferase activity, transferring acyl groups	IEA: Inferred from Electronic Annotation with EBI:KW-0012 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
cellular amino acid biosynthetic process	IEA: Inferred from Electronic Annotation with EBI:KW-0028 Last updated 2013-03-02	UniProt-GOA  (2011) Gene Ontology annotation based on manual assignment of UniProtKB keywords in UniProtKB/Swiss-Prot entries.	UniProtKB
methionine biosynthetic process	IEA: Inferred from Electronic Annotation with EBI:IPR008220 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-0486 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 Cellular Component
Annotation(s)	Evidence	Reference(s)	Assigned By
cytoplasm	IEA: Inferred from Electronic Annotation with EBI:IPR008220 Last updated 2013-03-02	DDB, et al.  (2001) Gene Ontology annotation through association of InterPro records with GO terms.	InterPro

*** 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)).