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ISC1 protein (Saccharomyces cerevisiae) - STRING interaction network
"ISC1" - Mitochondrial membrane localized inositol phosphosphingolipid phospholipase C, hydrolyzes complex sphingolipids to produce ceramide in Saccharomyces cerevisiae
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Predicted Interactions
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textmining
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protein homology
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ISC1Mitochondrial membrane localized inositol phosphosphingolipid phospholipase C, hydrolyzes complex sphingolipids to produce ceramide; activated by phosphatidylserine, cardiolipin, and phosphatidylglycerol; mediates Na+ and Li+ halotolerance; Responsible for the hydrolysis of the phosphosphingolipids (IPS), inositol phosphorylceramide (IPC), mannosylinositol phosphorylceramide (MIPC), and mannosyldiinositol phosphorylceramide (M(IP)2C). Also active on sphingomyelin, but this activity is probably not physiologically relevant (477 aa)    
Predicted Functional Partners:
SPO14
Phospholipase D; catalyzes the hydrolysis of phosphatidylcholine, producing choline and phosphatidic acid; involved in Sec14p-independent secretion; required for meiosis and spore formation; differently regulated in secretion and meiosis; participat /.../transcription initiation and/or early elongation of specific genes; interacts with "foot domain" of RNA polymerase II; deletion results in abnormal CTD-Ser5 phosphorylation of RNA polymerase II at specific promoter regions; Required for meiosis and spore formation. Seems to be involved in the coordinate induction of late meiotic events [...] (1683 aa)
         
  0.949
YPC1
Alkaline ceramidase that also has reverse (CoA-independent) ceramide synthase activity, catalyzes both breakdown and synthesis of phytoceramide; overexpression confers fumonisin B1 resistance; Hydrolyzes phytoceramide and also dihydroceramide into phytosphingosine or dihydrosphingosine. Prefers phytoceramide. Has also reverse hydrolysis activity, catalyzing synthesis of phytoceramide and dihydroceramide from palmitic acid and phytosphingosine or dihydrosphingosine. Is not responsible for the breakdown of unsaturated ceramide (316 aa)
       
 
  0.896
SIT4
Type 2A-related serine-threonine phosphatase that functions in the G1/S transition of the mitotic cycle; cytoplasmic and nuclear protein that modulates functions mediated by Pkc1p including cell wall and actin cytoskeleton organization; Involved in the dephosphorylation of the large subunit of RNA polymerase II. Is required in late G1 for normal G1 cyclin expression, bud initiation and expression of certain genes that are periodically expressed during late G1. Associates with the SAP proteins in a cell cycle-dependent manner (311 aa)
       
 
  0.834
LCB1
Component of serine palmitoyltransferase, responsible along with Lcb2p for the first committed step in sphingolipid synthesis, which is the condensation of serine with palmitoyl-CoA to form 3-ketosphinganine; Component of serine palmitoyltransferase (SPT), which catalyzes the committed step in the synthesis of sphingolipids, the condensation of serine with palmitoyl CoA to form the long chain base 3-ketosphinganine (558 aa)
       
 
  0.820
ORM2
Evolutionarily conserved protein, similar to Orm1p, required for resistance to agents that induce unfolded protein response; Orm1p and Orm2p together control membrane biogenesis by coordinating lipid homeostasis with protein quality control; Component of the SPOTS complex that acts as a negative regulator of sphingolipid synthesis. Acts by inhibiting serine palmitoyltransferases (LCB1 and LCB2) activity (216 aa)
       
 
  0.794
SCH9
Protein kinase involved in transcriptional activation of osmostress-responsive genes; regulates G1 progression, cAPK activity, nitrogen activation of the FGM pathway; involved in life span regulation; homologous to mammalian Akt/PKB; Protein kinase that is part of growth control pathway which is at least partially redundant with the cAMP pathway. Regulates both BCY1 phosphorylation and MPK1 activity (PubMed-20702584). Regulates ribosome biogenesis, translation initiation, and entry into stationary phase in a TORC1-dependent manner (PubMed-17560372) (824 aa)
       
 
  0.765
HSP60
Tetradecameric mitochondrial chaperonin required for ATP-dependent folding of precursor polypeptides and complex assembly; prevents aggregation and mediates protein refolding after heat shock; role in mtDNA transmission; phosphorylated; May participate in assembly and/or disassembly of proteins imported into the mitochondrion. HSP60 are ATPases and have affinity for unfolded proteins (572 aa)
       
      0.751
YDC1
Alkaline dihydroceramidase, involved in sphingolipid metabolism; preferentially hydrolyzes dihydroceramide to a free fatty acid and dihydrosphingosine; has a minor reverse activity; Catalyzes the conversion of dihydroceramide and also phytoceramide to dihydrosphingosine or phytosphingosine. Prefers dihydroceramide. Very low reverse hydrolysis activity, catalyzing synthesis of dihydroceramide from fatty acid and dihydrosphingosine. Is not responsible for the breakdown of unsaturated ceramide. May play a role in heat stress response (317 aa)
           
  0.749
TCM62
Protein involved in assembly of the succinate dehydrogenase complex; mitochondrial; putative chaperone; Chaperone. Required for the assembly of succinate dehydrogenase subunits. Ensures mitochondrial gene expression at elevated temperatures and prevents heat-aggregation of the ribosomal subunit VAR1 (572 aa)
       
      0.745
AUR1
Phosphatidylinositol-ceramide phosphoinositol transferase (IPC synthase), required for sphingolipid synthesis; can mutate to confer aureobasidin A resistance; Catalytic component of the inositol phosphorylceramide synthase which catalyzes the addition of a phosphorylinositol group onto ceramide to form inositol phosphorylceramide, an essential step in sphingolipid biosynthesis (401 aa)
     
   
  0.725
Your Current Organism:
Saccharomyces cerevisiae
NCBI taxonomy Id: 4932
Other names: Candida robusta, Pachytichospora, S. cerevisiae, Saccharomyces, Saccharomyces capensis, Saccharomyces cerevisiae, Saccharomyces italicus, Saccharomyces oviformis, Saccharomyces uvarum var. melibiosus, lager beer yeast, yeast
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