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SST2 protein (Saccharomyces cerevisiae) - STRING interaction network
"SST2" - GTPase-activating protein for Gpa1p, regulates desensitization to alpha factor pheromone in Saccharomyces cerevisiae
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SST2GTPase-activating protein for Gpa1p, regulates desensitization to alpha factor pheromone; also required to prevent receptor-independent signaling of the mating pathway; member of the RGS (regulator of G-protein signaling) family; Desensitization to alpha-factor pheromone. Is involved in regulating the signaling pathway for responding to mating pheromone (698 aa)    
Predicted Functional Partners:
GPA1
GTP-binding alpha subunit of the heterotrimeric G protein that couples to pheromone receptors; negatively regulates the mating pathway by sequestering G(beta)gamma and by triggering an adaptive response; activates Vps34p at the endosome; Alpha subunit of the heterotrimeric guanine nucleotide- binding protein (G protein) that mediates mating pheromone signal transduction. Binding of alpha-factor or a-factor to its cognate transmembrane receptor STE2 and STE3, respectively, allows the receptor to serve as a guanine nucleotide exchange factor (GEF) on GPA1. The exchange of GDP for GTP on [...] (472 aa)
     
  0.997
FUS1
Membrane protein localized to the shmoo tip, required for cell fusion; expression regulated by mating pheromone; proposed to coordinate signaling, fusion, and polarization events required for fusion; potential Cdc28p substrate; Required for cell fusion. Negatively regulates Sho1p signaling to ensure efficient cell fusion (512 aa)
     
   
  0.985
STE2
Receptor for alpha-factor pheromone; seven transmembrane-domain GPCR that interacts with both pheromone and a heterotrimeric G protein to initiate the signaling response that leads to mating between haploid a and alpha cells; Receptor for the peptide pheromone alpha factor, the mating factor of yeast (431 aa)
     
 
  0.976
AGA1
Anchorage subunit of a-agglutinin of a-cells, highly O-glycosylated protein with N-terminal secretion signal and C-terminal signal for addition of GPI anchor to cell wall, linked to adhesion subunit Aga2p via two disulfide bonds; Cell wall anchoring subunit of the a-agglutinin heterodimer. S.cerevisiae a and alpha cells express the complementary cell surface glycoproteins a-agglutinin and alpha- agglutinin, respectively, which interact with one another to promote cellular aggregation during mating (725 aa)
     
   
  0.968
STE4
G protein beta subunit, forms a dimer with Ste18p to activate the mating signaling pathway, forms a heterotrimer with Gpa1p and Ste18p to dampen signaling; may recruit Rho1p to the polarized growth site during mating; contains WD40 repeats; Implicated in the a- and alpha-factor response pathway. The beta and gamma chains of the putative yeast mating response pathway G protein play a positive role in initiation of the mating response. The beta and gamma chains are required for the GTPase activity, for replacement of GDP by GTP, and for G protein- effector interaction (423 aa)
     
 
  0.964
FAR1
Cyclin-dependent kinase inhibitor that mediates cell cycle arrest in response to pheromone; also forms a complex with Cdc24p, Ste4p, and Ste18p that may specify the direction of polarized growth during mating; potential Cdc28p substrate; Inhibitor of the cyclin-dependent kinase CDC28. Necessary for cell cycle arrest. Involved in pheromone response. Contributes to mating efficiency. Required for oriented polarization of yeast cells in response to mating pheromones (830 aa)
     
 
  0.962
FUS3
Mitogen-activated serine/threonine protein kinase involved in mating; phosphoactivated by Ste7p; substrates include Ste12p, Far1p, Bni1p, Sst2p; inhibits invasive growth during mating by phosphorylating Tec1p, promoting its degradation; Together with closely related KSS1, FUS3 is the final kinase in the signal transduction cascade regulating activation/repression of the mating and filamentation pathways, induced by pheromone and nitrogen/carbon limitation, respectively. Phosphorylated FUS3 activates the mating but suppresses the filamentation pathway, whereas activated KSS1 activates b [...] (353 aa)
     
 
  0.946
STE3
Receptor for a factor pheromone, couples to MAP kinase cascade to mediate pheromone response; transcribed in alpha cells and required for mating by alpha cells, ligand bound receptors endocytosed and recycled to the plasma membrane; GPCR; Receptor for the peptide pheromone a factor (470 aa)
     
 
  0.916
STE5
Pheromone-response scaffold protein that controls the mating decision; binds Ste11p, Ste7p, and Fus3p kinases, forming a MAPK cascade complex that interacts with the plasma membrane and Ste4p-Ste18p; allosteric activator of Fus3p; Component of the pheromone signal transduction pathway. It mediates pheromone signals acting between STE20 and STE11. It is absolutely required for pheromone-induced transcription of FUS1. May play a role in cell-cycle arrest in response to pheromone (917 aa)
     
 
  0.912
MPT5
Member of the Puf family of RNA-binding proteins; binds to mRNAs encoding chromatin modifiers and spindle pole body components; involved in longevity, maintenance of cell wall integrity, and sensitivity to and recovery from pheromone arrest; RNA-binding protein involved in post-transcriptional regulation. Negatively regulates expression of HO by binding to the 3’-UTR of HO mRNA. Predominantly binds to mRNAs encoding chromatin modifiers and spindle pole body components. Recognizes and binds to 5’-TGTAA[CT]A[AT]TA-3’ in the 3’-UTR of target mRNAs. Multicopy suppressor of POP2 mutation. R [...] (859 aa)
       
 
  0.903
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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