JAC1 J-type chaperone JAC1 [Saccharomyces cerevisiae S288C] - Gene

Summary

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Official Symbol: JAC1
Official Full Name: J-type chaperone JAC1
Primary source: SGD:S000002986
Locus tag: YGL018C
See related: AllianceGenome:SGD:S000002986; FungiDB:YGL018C; VEuPathDB:YGL018C
Gene type: protein coding
RefSeq status: REVIEWED
Organism: Saccharomyces cerevisiae S288C (strain: S288C)
Lineage: Eukaryota; Fungi; Dikarya; Ascomycota; Saccharomycotina; Saccharomycetes; Saccharomycetales; Saccharomycetaceae; Saccharomyces
Summary: Enables ATPase activator activity and protein-folding chaperone binding activity. Involved in aerobic respiration; intracellular iron ion homeostasis; and protein maturation by iron-sulfur cluster transfer. Located in mitochondrial matrix. Human ortholog(s) of this gene implicated in sideroblastic anemia. Orthologous to human HSCB (HscB mitochondrial iron-sulfur cluster cochaperone). [provided by Alliance of Genome Resources, Dec 2024]
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Genomic context

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See JAC1 in Genome Data Viewer

Location:: chromosome: VII

Exon count:: 1

Sequence:: Chromosome: VII; NC_001139.9 (459110..459664, complement)

Chromosome VII - NC_001139.9 Genomic Context describing neighboring genes

Genomic regions, transcripts, and products

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Go to reference sequence details

Genomic Sequence:: NC_001139.9

Go to nucleotide: Graphics FASTA GenBank

Bibliography

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GeneRIFs: Gene References Into Functions

What's a GeneRIF?

Isu is a substrate of the Lon-type protease and that it is protected from degradation by Jac1, the J-protein Hsp70 cochaperone that functions in cluster transfer from Isu. Jac1 variants known to be defective in interaction with Isu were also defective in protecting Isu from degradation.
Title: Protection of scaffold protein Isu from degradation by the Lon protease Pim1 as a component of Fe-S cluster biogenesis regulation.
Studied the structure and dynamics of the yeast Isu1-Jac1 complex.
Title: Molecular modeling of the binding modes of the iron-sulfur protein to the Jac1 co-chaperone from Saccharomyces cerevisiae by all-atom and coarse-grained approaches.
Competition between Jac1 and Nfs1 for Isu binding plays an important role in transitioning the iron/Sulfur cluster biogenesis machinery.
Title: Binding of the chaperone Jac1 protein and cysteine desulfurase Nfs1 to the iron-sulfur cluster scaffold Isu protein is mutually exclusive.
Jac1:Isu1 interaction plays an indispensable role in the essential process of mitochondrial Fe-S cluster biogenesis
Title: Interaction of J-protein co-chaperone Jac1 with Fe-S scaffold Isu is indispensable in vivo and conserved in evolution.
Ssq1p/Jac1p/Mge1p are not important for Fe/S cluster synthesis on Isu1p
Title: The Hsp70 chaperone Ssq1p is dispensable for iron-sulfur cluster formation on the scaffold protein Isu1p.
formation of a Jac1-Isu1 complex can overcome a lowered affinity of Ssq1 for Isu in vivo as well as in vitro
Title: Compensation for a defective interaction of the hsp70 ssq1 with the mitochondrial Fe-S cluster scaffold isu.
analysis of the interaction between Jac1p and the scaffold for Fe-S cluster biogenesis, Isu1p
Title: Characterization of the interaction between the J-protein Jac1p and the scaffold for Fe-S cluster biogenesis, Isu1p.

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Pathways from PubChem

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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 ATPase activator activity	IDA Inferred from Direct Assay more info	PubMed
enables ATPase activator activity	IEA Inferred from Electronic Annotation more info
enables protein-folding chaperone binding	IEA Inferred from Electronic Annotation more info
enables protein-folding chaperone binding	IMP Inferred from Mutant Phenotype more info	PubMed

Process	Evidence Code	Pubs
involved_in [2Fe-2S] cluster assembly	IBA Inferred from Biological aspect of Ancestor more info
involved_in [2Fe-2S] cluster assembly	IEA Inferred from Electronic Annotation more info
involved_in aerobic respiration	IMP Inferred from Mutant Phenotype more info	PubMed
involved_in intracellular iron ion homeostasis	IMP Inferred from Mutant Phenotype more info	PubMed
involved_in protein complex oligomerization	IEA Inferred from Electronic Annotation more info
involved_in protein maturation by [2Fe-2S] cluster transfer	IMP Inferred from Mutant Phenotype more info	PubMed
involved_in protein maturation by [4Fe-4S] cluster transfer	IMP Inferred from Mutant Phenotype more info	PubMed
involved_in protein maturation by iron-sulfur cluster transfer	IMP Inferred from Mutant Phenotype more info	PubMed

Component	Evidence Code	Pubs
located_in mitochondrial matrix	IDA Inferred from Direct Assay more info	PubMed
located_in mitochondrial matrix	IEA Inferred from Electronic Annotation more info
located_in mitochondrion	HDA more info	PubMed
is_active_in mitochondrion	IBA Inferred from Biological aspect of Ancestor more info
located_in mitochondrion	IDA Inferred from Direct Assay more info	PubMed
located_in mitochondrion	IEA Inferred from Electronic Annotation more info
is_active_in mitochondrion	IMP Inferred from Mutant Phenotype more info	PubMed

General protein information

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Preferred Names: J-type chaperone JAC1

NP_011497.1

Specialized J-protein that functions in Fe-S cluster biogenesis; functions with Hsp70 in Fe-S cluster biogenesis in mitochondria; involved in iron metabolism; contains a J domain typical to J-type chaperones; localizes to the mitochondrial matrix