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

Last Reviewed on: 2003-10-14    Molecular Function | Biological Process | Cellular Component

Manually curated Molecular Function
Annotation(s)	Evidence	Reference(s)	Assigned By
transcription corepressor activity	IPI: Inferred from Physical Interaction Assigned on 2002-03-21	Wagner C, et al.  (2001) The negative regulator Opi1 of phospholipid biosynthesis in yeast contacts the pleiotropic repressor Sin3 and the transcriptional activator Ino2. Mol Microbiol 41(1):155-66	SGD

Manually curated Biological Process
Annotation(s)	Evidence	Reference(s)	Assigned By
endoplasmic reticulum unfolded protein response	IMP: Inferred from Mutant Phenotype Assigned on 2007-12-05	Hancock LC, et al.  (2006) Genomic analysis of the Opi- phenotype. Genetics 173(2):621-34	SGD
negative regulation of transcription from RNA polymerase II promoter	IMP: Inferred from Mutant Phenotype Assigned on 2002-03-21	White MJ, et al.  (1991) The OPI1 gene of Saccharomyces cerevisiae, a negative regulator of phospholipid biosynthesis, encodes a protein containing polyglutamine tracts and a leucine zipper. J Biol Chem 266(2):863-72	SGD
phospholipid biosynthetic process	IMP: Inferred from Mutant Phenotype Assigned on 2002-03-21	White MJ, et al.  (1991) The OPI1 gene of Saccharomyces cerevisiae, a negative regulator of phospholipid biosynthesis, encodes a protein containing polyglutamine tracts and a leucine zipper. J Biol Chem 266(2):863-72	SGD
positive regulation of transcription from RNA polymerase II promoter	IMP: Inferred from Mutant Phenotype Assigned on 2003-10-14	Santiago TC and Mamoun CB  (2003) Genome expression analysis in yeast reveals novel transcriptional regulation by inositol and choline and new regulatory functions for Opi1p, Ino2p, and Ino4p. J Biol Chem 278(40):38723-30	SGD

Manually curated Cellular Component
Annotation(s)	Evidence	Reference(s)	Assigned By
endoplasmic reticulum	IDA: Inferred from Direct Assay Assigned on 2007-05-04	Loewen CJ, et al.  (2004) Phospholipid metabolism regulated by a transcription factor sensing phosphatidic acid. Science 304(5677):1644-7	SGD
nuclear envelope	IDA: Inferred from Direct Assay Assigned on 2007-05-04	Loewen CJ, et al.  (2004) Phospholipid metabolism regulated by a transcription factor sensing phosphatidic acid. Science 304(5677):1644-7	SGD
nuclear membrane	IDA: Inferred from Direct Assay Assigned on 2007-05-07	Brickner JH and Walter P  (2004) Gene recruitment of the activated INO1 locus to the nuclear membrane. PLoS Biol 2(11):e342	SGD
nucleoplasm	IDA: Inferred from Direct Assay Assigned on 2007-05-07	Brickner JH and Walter P  (2004) Gene recruitment of the activated INO1 locus to the nuclear membrane. PLoS Biol 2(11):e342	SGD
nucleus	IDA: Inferred from Direct Assay Assigned on 2007-05-04	Loewen CJ, et al.  (2004) Phospholipid metabolism regulated by a transcription factor sensing phosphatidic acid. Science 304(5677):1644-7	SGD
	IDA: Inferred from Direct Assay Assigned on 2007-05-07	Brickner JH and Walter P  (2004) Gene recruitment of the activated INO1 locus to the nuclear membrane. PLoS Biol 2(11):e342	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 OPI1

** 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
DNA binding	IEA: Inferred from Electronic Annotation with EBI:KW-0238 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
phospholipid biosynthetic process	IEA: Inferred from Electronic Annotation with EBI:KW-0594 Last updated 2013-03-02	UniProt-GOA  (2011) Gene Ontology annotation based on manual assignment of UniProtKB keywords in UniProtKB/Swiss-Prot entries.	UniProtKB
regulation of transcription, DNA-dependent	IEA: Inferred from Electronic Annotation with EBI:KW-0805 Last updated 2013-03-02	UniProt-GOA  (2011) Gene Ontology annotation based on manual assignment of UniProtKB keywords in UniProtKB/Swiss-Prot entries.	UniProtKB
transcription, DNA-dependent	IEA: Inferred from Electronic Annotation with EBI:KW-0804 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
endoplasmic reticulum	IEA: Inferred from Electronic Annotation with EBI:SL-0095 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-0256 Last updated 2013-03-02	UniProt-GOA  (2011) Gene Ontology annotation based on manual assignment of UniProtKB keywords in UniProtKB/Swiss-Prot entries.	UniProtKB
nucleus	IEA: Inferred from Electronic Annotation with EBI:SL-0191 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-0539 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)).