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SPT23 protein (Saccharomyces cerevisiae) - STRING interaction network
"SPT23" - ER membrane protein involved in regulation of OLE1 transcription, acts with homolog Mga2p in Saccharomyces cerevisiae
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experimentally determined
Predicted Interactions
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textmining
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protein homology
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SPT23ER membrane protein involved in regulation of OLE1 transcription, acts with homolog Mga2p; inactive ER form dimerizes and one subunit is then activated by ubiquitin/proteasome-dependent processing followed by nuclear targeting; Dosage-dependent suppressor of Ty-induced promoter mutations. May exert its suppression effect through protein- protein interactions since does not present any of the motifs generally found in transcriptional activators or DNA binding proteins (1082 aa)    
Predicted Functional Partners:
OLE1
Delta(9) fatty acid desaturase, required for monounsaturated fatty acid synthesis and for normal distribution of mitochondria; Stearyl-CoA desaturase that utilizes O(2) and electrons from reduced cytochrome b5 to introduce the first double bond into saturated fatty acyl-CoA substrates (PubMed-1978720, PubMed-7947684). Catalyzes the insertion of a cis double bond at the delta-9 position into fatty acyl-CoA substrates including palmitoyl-CoA and stearoyl-CoA (PubMed-1978720). Required for the biosynthesis of membrane phospholipids, cholesterol esters and triglycerides (PubMed-1978720, Pu [...] (510 aa)
       
 
  0.975
UFD1
Protein that interacts with Cdc48p and Npl4p, involved in recognition of polyubiquitinated proteins and their presentation to the 26S proteasome for degradation; involved in transporting proteins from the ER to the cytosol; Functions at a post-ubiquitation step in the ubiquitin fusion degradation (UFD) pathway. Has a role in the endoplasmic reticulum-associated degradation (ERAD) pathway. Required for the proteasome-dependent processing/activation of MGA2 and SPT23 transcription factors leading to the subsequent expression of OLE1. Has an additional role in the turnover of OLE1 where i [...] (361 aa)
       
 
  0.971
CDC48
AAA ATPase; subunit of polyubiquitin-selective segregase complex involved in ERAD, cell wall integrity during heat stress, mitotic spindle disassembly; role in mobilizing membrane bound transcription factors by regulated ubiquitin/proteasome-dependent processing in macroautophagy, PMN, RAD, ribophagy, homotypic ER membrane fusion, disassembly of Met30p from SCF complex, telomerase regulation via Est1p degradation; human ortholog VCP can complement yeast cdc48 mutant; Involved in spindle disassembly, degradation of ubiquitinated proteins and protein export from the endoplasmic reticulum [...] (835 aa)
       
 
  0.956
DOA1
WD repeat protein required for ubiquitin-mediated protein degradation, forms complex with Cdc48p, plays a role in controlling cellular ubiquitin concentration; also promotes efficient NHEJ in postdiauxic/stationary phase; Participates in the regulation of the ubiquitin conjugation pathway involving CDC48 by hindering multiubiquitination of substrates at the CDC48 chaperone. May act by preventing the interaction between CDC48 and the E4 enzyme UFD2, leading to prevent multiubiquitination of substrates and subsequent degradation. Essential for maintaining cellular ubiquitin levels (715 aa)
       
 
  0.937
RSP5
E3 ubiquitin ligase of the NEDD4 family; involved in regulating many cellular processes including MVB sorting, heat shock response, transcription, endocytosis, and ribosome stability; human homolog is involved in Liddle syndrome; mutant tolerates an /.../dy; ubiquitylates Sec23p; E3 ubiquitin-protein ligase which accepts ubiquitin from an E2 ubiquitin-conjugating enzyme in the form of a thioester and then directly transfers the ubiquitin to targeted substrates. Component of a RSP5 ubiquitin ligase complex which specifies polyubiquitination and intracellular trafficking of the general a [...] (809 aa)
       
 
  0.921
NPL4
Ubiquitin-binding protein involved in protein degradation; Cdc48p-Npl4p-Ufd1p complex participates in ER-associated degradation (ERAD) while Cdc48p-Npl4p-Vms1p complex participates in mitochondria-associated degradation (MAD); Involved in the import of nuclear-targeted proteins into the nucleus and the export of poly(A) RNA out of the nucleus. Has a role in the endoplasmic reticulum-associated degradation (ERAD) pathway. Required for the proteasome-dependent processing/activation of MGA2 and SPT23 transcription factors leading to the subsequent expression of OLE1. Has an additional rol [...] (580 aa)
       
 
  0.913
OTU1
Deubiquitylation enzyme that binds to the chaperone-ATPase Cdc48p; may contribute to regulation of protein degradation by deubiquitylating substrates that have been ubiquitylated by Ufd2p; member of the Ovarian Tumor (OTU) family; Hydrolase that can remove conjugated ubiquitin from proteins and may therefore play an important regulatory role at the level of protein turnover by preventing degradation. Participates in the regulation of the ubiquin conjugation pathway involving CDC48 by hindering multiubiquitination of substrates at the CDC48 chaperone. May be indireclty involved in PIS1 [...] (301 aa)
       
 
  0.888
PPG1
Putative serine/threonine protein phosphatase of the type 2A-like phosphatase family, required for glycogen accumulation; interacts with Tap42p, which binds to and regulates other protein phosphatases; Involved in glycogen accumulation (368 aa)
       
      0.800
VPS64
Protein required for cytoplasm to vacuole targeting of proteins; forms a complex with Far3p and Far7p to Far11p involved in recovery from pheromone-induced cell cycle arrest; mutant has increased aneuploidy tolerance; Participates in the control of the reentry into the cell cycle following pheromone treatment. Involved in vacuolar protein sorting (604 aa)
       
      0.800
DGK1
Diacylglycerol kinase, localized to the endoplasmic reticulum (ER); overproduction induces enlargement of ER-like membrane structures and suppresses a temperature-sensitive sly1 mutation; contains a CTP transferase domain; Involved in pre-tRNA splicing (By similarity). CTP- dependent diacylglycerol kinase that catalyzes the phosphorylation of diacylglycerol (DAG) to phosphatidate (PA). Controls phosphatidate levels at the nuclear envelope. Counteracts the activity of PAH1/SMP2. Involved in the resistance to nickel chloride and nalidixic acid. May be involved in vesicle trafficking betw [...] (290 aa)
       
 
  0.760
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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