INO2 Ino2p [Saccharomyces cerevisiae S288C] - Gene

Summary

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Official Symbol: INO2
Official Full Name: Ino2p
Primary source: SGD:S000002530
Locus tag: YDR123C
See related: AllianceGenome:SGD:S000002530; FungiDB:YDR123C; VEuPathDB:YDR123C
Gene type: protein coding
RefSeq status: REVIEWED
Organism: Saccharomyces cerevisiae S288C (strain: S288C)
Lineage: Eukaryota; Fungi; Dikarya; Ascomycota; Saccharomycotina; Saccharomycetes; Saccharomycetales; Saccharomycetaceae; Saccharomyces
Also known as: DIE1; SCS1
Summary: Contributes to DNA-binding transcription activator activity, RNA polymerase II-specific and RNA polymerase II cis-regulatory region sequence-specific DNA binding activity. Involved in phospholipid biosynthetic process and positive regulation of transcription by RNA polymerase II. Located in nucleus. Part of RNA polymerase II transcription regulator complex. [provided by Alliance of Genome Resources, Dec 2024]
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Genomic context

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See INO2 in Genome Data Viewer

Location:: chromosome: IV

Exon count:: 1

Sequence:: Chromosome: IV; NC_001136.10 (698554..699468, complement)

Chromosome IV - NC_001136.10 Genomic Context describing neighboring genes

Genomic regions, transcripts, and products

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Go to reference sequence details

Genomic Sequence:: NC_001136.10

Go to nucleotide: Graphics FASTA GenBank

Bibliography

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GeneRIFs: Gene References Into Functions

What's a GeneRIF?

Structural Analysis of Ino2p/Ino4p Mutual Interactions and Their Binding Interface with Promoter DNA.
Title: Structural Analysis of Ino2p/Ino4p Mutual Interactions and Their Binding Interface with Promoter DNA.
corepressors may be recruited not only by repressors but also by activators such as Ino2. Indeed, we could demonstrate direct interaction of Ino2 with Sin3 and Cyc8. The Opi1 repressor interaction domain within Ino2 is also able to contact Sin3 and Cyc8.
Title: Promoter recruitment of corepressors Sin3 and Cyc8 by activator proteins of the yeast Saccharomyces cerevisiae.
Upon induction, Ino2p dissociates from the INM1 promoter.
Title: The transcriptional activator Ino2p dissociates from the yeast INM1 promoter in induction.
Cbf1p binding to the upstream sites was required for the binding of the ISW2 chromatin-remodeling complex to the Ino2p-Ino4p-binding sites on the INO1 promoter.
Title: Derepression of INO1 transcription requires cooperation between the Ino2p-Ino4p heterodimer and Cbf1p and recruitment of the ISW2 chromatin-remodeling complex.
Factors required for activation of yeast phospholipid biosynthetic genes depend on activator protein Ino2 which binds to the inositol/choline-responsive element.
Title: Mediator subunits and histone methyltransferase Set2 contribute to Ino2-dependent transcriptional activation of phospholipid biosynthesis in the yeast Saccharomyces cerevisiae.
Ino2p activator is required for histone acetylation.
Title: Gene-wide histone acetylation at the yeast INO1 requires the transcriptional activator Ino2p.
Autoregulatory expression of INO2, INO4 and OPI1 was abolished by promoter exchange experiments, showing that autoregulation of regulators contributes to the degree of differential gene expression but is not responsible for it.
Title: Dimerization of yeast transcription factors Ino2 and Ino4 is regulated by precursors of phospholipid biosynthesis mediated by Opi1 repressor.
Genes containing the UASINO sequence were bound by Ino2p.
Title: Genome-wide analysis reveals inositol, not choline, as the major effector of Ino2p-Ino4p and unfolded protein response target gene expression in yeast.
Gene repression occurs in the presence of sufficient inositol and choline, requiring an intact Opi1 repressor which binds to Ino2, we mapped an 18 aa repressor interaction domain within Ino2 necessary and sufficient for binding by Opi1.
Title: Constitutive expression of yeast phospholipid biosynthetic genes by variants of Ino2 activator defective for interaction with Opi1 repressor.

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Interactions

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Products	Interactant	Other Gene	Complex	Source	Pubs	Description

General gene information

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Homology

Orthologs from OrthoDB

Gene Ontology Provided by SGD

Function	Evidence Code	Pubs
enables DNA binding	IEA Inferred from Electronic Annotation more info
contributes_to DNA-binding transcription activator activity, RNA polymerase II-specific	IDA Inferred from Direct Assay more info	PubMed
contributes_to DNA-binding transcription activator activity, RNA polymerase II-specific	IMP Inferred from Mutant Phenotype more info	PubMed
contributes_to RNA polymerase II cis-regulatory region sequence-specific DNA binding	IDA Inferred from Direct Assay more info	PubMed
enables protein dimerization activity	IEA Inferred from Electronic Annotation more info

Process	Evidence Code	Pubs
involved_in phospholipid biosynthetic process	IEA Inferred from Electronic Annotation more info
involved_in phospholipid biosynthetic process	IMP Inferred from Mutant Phenotype more info	PubMed
involved_in positive regulation of transcription by RNA polymerase II	IMP Inferred from Mutant Phenotype more info	PubMed
involved_in positive regulation of transcription by RNA polymerase II	IPI Inferred from Physical Interaction more info	PubMed

Component	Evidence Code	Pubs
part_of RNA polymerase II transcription regulator complex	IDA Inferred from Direct Assay more info	PubMed
part_of RNA polymerase II transcription regulator complex	IPI Inferred from Physical Interaction more info	PubMed
located_in nucleus	IDA Inferred from Direct Assay more info	PubMed
located_in nucleus	IEA Inferred from Electronic Annotation more info

General protein information

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Preferred Names: Ino2p

NP_010408.1

Transcription factor; component of the heteromeric Ino2p/Ino4p basic helix-loop-helix transcription activator that binds inositol/choline-responsive elements (ICREs), required for derepression of phospholipid biosynthetic genes in response to inositol depletion; involved in diauxic shift

NCBI Reference Sequences (RefSeq)

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Genome Annotation

The following sections contain reference sequences that belong to a specific genome build. Explain

Reference assembly

Genomic

NC_001136.10 Reference assembly

Range

698554..699468 complement

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GenBank, FASTA, Sequence Viewer (Graphics)

mRNA and Protein(s)

NM_001180431.1 → NP_010408.1 TPA: Ino2p [Saccharomyces cerevisiae S288C]

See identical proteins and their annotated locations for NP_010408.1

Status: REVIEWED

UniProtKB/Swiss-Prot

D6VSA9, P26798

UniProtKB/TrEMBL

A6ZY85, B3LGF3, B5VG18, C7GIN1, C8Z539, G2WAM5, N1P6C7

Conserved Domains (1) summary

cd11388
Location:235 → 302

bHLH_ScINO2_like; basic helix-loop-helix (bHLH) domain found in Saccharomyces cerevisiae protein INO2 and similar proteins