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SIG2 protein (Arabidopsis thaliana) - STRING interaction network
"SIG2" - RNA polymerase sigma factor sigB in Arabidopsis thaliana
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experimentally determined
Predicted Interactions
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textmining
co-expression
protein homology
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SIG2RNA polymerase sigma factor sigB; Required for the transition of plastids into chloroplasts by coordinating nuclear and chloroplastic genomes under light conditions. Sigma factors are initiation factors that promote the attachment of plastid-encoded RNA polymerase (PEP) to specific initiation sites and are then released. Promotes the biosynthesis of plastid-encoded tRNAs (e.g. trnE-UUC and trnV- UAC) (572 aa)    
Predicted Functional Partners:
CSK
Chloroplast sensor kinase, chloroplastic; Sensor kinase required for sensing the plastoquinone redox state involved in both photosystems stoichiometry adjustment (e.g. long-term adaptation via transcriptional regulation of reaction center genes of photosystems I and II) and state transitions (e.g. short-term adaptation involving reversible post- translational phosphorylation of light-harvesting complex II, LHC II), thus linking photosynthesis with gene expression in chloroplasts. Probably phosphorylates SIGA/SIG1 in response to plastoquinone redox state modification (611 aa)
     
   
  0.913
RPOA
DNA-directed RNA polymerase subunit alpha; DNA-dependent RNA polymerase catalyzes the transcription of DNA into RNA using the four ribonucleoside triphosphates as substrates (329 aa)
     
 
  0.906
AT2G23070
Casein kinase II subunit alpha-4, chloroplastic; Casein kinases are operationally defined by their preferential utilization of acidic proteins such as caseins as substrates. The alpha chain contains the catalytic site (By similarity). Involved in the regulation of various developmental processes. Involved in the regulation of plant growth and flowering time. Involved in retrograde signaling in plant responses to abscisic acid (ABA) and heat stress. May act as an enhancing factor in abiotic stress signaling through modulation of the expression of some molecular players in retrograde sig [...] (432 aa)
       
 
  0.871
RPOB
Chloroplast DNA-dependent RNA polymerase B subunit. The transcription of this gene is regulated by a nuclear encoded RNA polymerase. This gene has been transferred to mitochondrial genome during crucifer evolution (1072 aa)
   
 
  0.858
AT2G20050
Protein phosphatase 2C and cyclic nucleotide-binding/kinase domain-containing protein; Protein serine/threonine phosphatases;protein kinases;catalytics;cAMP-dependent protein kinase regulators;ATP binding;protein serine/threonine phosphatases; Its function is described as cAMP-dependent protein kinase regulator activity, protein kinase activity, protein serine/threonine phosphatase activity, catalytic activity, ATP binding; Involved in protein amino acid phosphorylation, protein amino acid dephosphorylation, N-terminal protein myristoylation, regulation of protein amino acid phosphoryl [...] (1094 aa)
   
 
  0.844
PSBD
Photosystem II reaction center protein D; Photosystem II (PSII) is a light-driven water- plastoquinone oxidoreductase that uses light energy to abstract electrons from H(2)O, generating O(2) and a proton gradient subsequently used for ATP formation. It consists of a core antenna complex that captures photons, and an electron transfer chain that converts photonic excitation into a charge separation. The D1/D2 (PsbA/PsbA) reaction center heterodimer binds P680, the primary electron donor of PSII as well as several subsequent electron acceptors. D2 is needed for assembly of a stable PSII [...] (353 aa)
           
  0.839
NRPB6A
DNA-directed RNA polymerases II, IV and V subunit 6A; DNA-dependent RNA polymerase catalyzes the transcription of DNA into RNA using the four ribonucleoside triphosphates as substrates. Component of RNA polymerase II which synthesizes mRNA precursors and many functional non-coding RNAs. Pol II is the central component of the basal RNA polymerase II transcription machinery. It is composed of mobile elements that move relative to each other. Component of RNA polymerases IV and V which mediate short-interfering RNAs (siRNA) accumulation and subsequent RNA- directed DNA methylation-depende [...] (144 aa)
   
 
  0.814
NRPB6B
DNA-directed RNA polymerases II and V subunit 6B; DNA-dependent RNA polymerase catalyzes the transcription of DNA into RNA using the four ribonucleoside triphosphates as substrates. Component of RNA polymerase II which synthesizes mRNA precursors and many functional non-coding RNAs. Pol II is the central component of the basal RNA polymerase II transcription machinery. It is composed of mobile elements that move relative to each other. Component of RNA polymerase V which mediates RNA- directed DNA methylation-dependent (RdDM) transcriptional gene silencing (TGS) of endogenous repeated [...] (144 aa)
   
 
  0.814
AGY1
Protein translocase subunit SECA1, chloroplastic; Encodes the ATPase subunit of the chloroplast Sec translocation machinery which plays an essential role in chloroplast biogenesis and the regulation of photosynthesis, the absence of which triggers a retrograde signal, eventually leading to a reprogramming of chloroplast and mitochondrial gene expression (1042 aa)
 
 
  0.812
RPOC1
DNA-directed RNA polymerase family protein; DNA-dependent RNA polymerase catalyzes the transcription of DNA into RNA using the four ribonucleoside triphosphates as substrates; Belongs to the RNA polymerase beta’ chain family. RpoC1 subfamily (680 aa)
     
 
  0.801
Your Current Organism:
Arabidopsis thaliana
NCBI taxonomy Id: 3702
Other names: A. thaliana, Arabidopsis thaliana, Arabidopsis thaliana (L.) Heynh., mouse-ear cress, thale cress, thale-cress
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