Gene: AT3G11820 (Arabidopsis thaliana)

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Gene Identifier
Transcript Identifier
Gene Type
Coding gene
3 : 3729540-3730868 : negative


Gene family
(127 genes in 16 species)
specific family
(3 genes in 3 species)
specific family

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syntaxin of plants 121
Curated Summary
Encodes a syntaxin localized at the plasma membrane (SYR1, Syntaxin Related Protein 1, also known as SYP121, PENETRATION1/PEN1). SYR1/PEN1 is a member of the SNARE superfamily proteins. SNARE proteins are involved in cell signaling, vesicle traffic, growth and development. SYR1/PEN1 functions in positioning anchoring of the KAT1 K+ channel protein at the plasma membrane. Transcription is upregulated by abscisic acid, suggesting a role in ABA signaling. Also functions in non-host resistance against barley powdery mildew, Blumeria graminis sp. hordei. SYR1/PEN1 is a nonessential component of the preinvasive resistance against Colletotrichum fungus. Required for mlo resistance. The syp121 point mutation results in stomatal phenotypes that reduce CO2 assimilation, slow vegetative growth and increase water use efficiency in the whole plant, conditional upon high light intensities and low relative humidity.
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Identifier Name
aliassyntaxin of plants 121





Biological Process

GO termEvidence(s)ProviderDescriptionSource
GO:0006886TAS, IEAGene Ontologyintracellular protein transport1
GO:0009620IMPGene Ontologyresponse to fungus1
GO:0050832IGI, RCA, UniProtdefense response to fungus1 2 3 4 5 6 7
GO:0006952TASGene Ontologydefense response1
GO:0031348IMP, RCAGene Ontologynegative regulation of defense response1 2
GO:0009863IGI, RCA, UniProtsalicylic acid mediated signaling pathway1 2 3 4 5 6 7
GO:0009867IGI, RCA, UniProtjasmonic acid mediated signaling pathway1 2 3 4 5 6 7
GO:0010363IGI, RCA, UniProtregulation of plant-type hypersensitive response1 2 3 4 5 6 7
GO:0043069IGI, RCA, UniProtnegative regulation of programmed cell death1 2 3 4 5 6 7
GO:0051245IGIUniProtnegative regulation of cellular defense response1 2 3 4 5 6
GO:0006612IDA, RCAGene Ontologyprotein targeting to membrane1 2
GO:0010119IMPUniProtregulation of stomatal movement1 2 3 4 5 6
GO:0010148IMPUniProttranspiration1 2 3 4 5 6
GO:0072660IMPUniProtmaintenance of protein location in plasma membrane1 2 3 4 5 6
GO:0072661IMPUniProtprotein targeting to plasma membrane1 2 3 4 5 6
GO:0000165RCAGene OntologyMAPK cascade1
GO:0002679RCAGene Ontologyrespiratory burst involved in defense response1
GO:0006355RCAGene Ontologyregulation of transcription, DNA-dependent1
GO:0006820RCAGene Ontologyanion transport1
GO:0006862RCAGene Ontologynucleotide transport1
GO:0006888RCAGene OntologyER to Golgi vesicle-mediated transport1
GO:0007154RCAGene Ontologycell communication1
GO:0007165RCAGene Ontologysignal transduction1
GO:0009409RCAGene Ontologyresponse to cold1
GO:0009414RCAGene Ontologyresponse to water deprivation1
GO:0009595RCAGene Ontologydetection of biotic stimulus1
GO:0009611RCAGene Ontologyresponse to wounding1
GO:0009617RCAGene Ontologyresponse to bacterium1
GO:0009625RCAGene Ontologyresponse to insect1
GO:0009697RCAGene Ontologysalicylic acid biosynthetic process1
GO:0009723RCAGene Ontologyresponse to ethylene1
GO:0009733RCAGene Ontologyresponse to auxin1
GO:0009738RCAGene Ontologyabscisic acid-activated signaling pathway1
GO:0009753RCAGene Ontologyresponse to jasmonic acid1
GO:0009862RCAGene Ontologysystemic acquired resistance, salicylic acid mediated signaling pathway1
GO:0009963RCAGene Ontologypositive regulation of flavonoid biosynthetic process1
GO:0010200RCAGene Ontologyresponse to chitin1
GO:0010310RCAGene Ontologyregulation of hydrogen peroxide metabolic process1
GO:0015696RCAGene Ontologyammonium transport1
GO:0015802RCAGene Ontologybasic amino acid transport1
GO:0030968RCAGene Ontologyendoplasmic reticulum unfolded protein response1
GO:0035304RCAGene Ontologyregulation of protein dephosphorylation1
GO:0042538RCAGene Ontologyhyperosmotic salinity response1
GO:0042742RCAGene Ontologydefense response to bacterium1
GO:0043090RCAGene Ontologyamino acid import1
GO:0043269RCAGene Ontologyregulation of ion transport1
GO:0043900RCAGene Ontologyregulation of multi-organism process1
GO:0045087RCAGene Ontologyinnate immune response1
GO:0051707RCAGene Ontologyresponse to other organism1
GO:0009737IEPUniProtresponse to abscisic acid1 2 3 4 5 6
GO:0016192IEAUniProtvesicle-mediated transport1 2 3 4 5

Molecular Function

GO termEvidence(s)ProviderDescriptionSource
GO:0005484TAS, IEAGene OntologySNAP receptor activity1
GO:0043495IDAUniProtprotein anchor1 2 3 4 5 6
GO:0005515IPI, IEAGene Ontologyprotein binding1

Cellular Component

GO termEvidence(s)ProviderDescriptionSource
GO:0005886IDA, TAS, UniProtplasma membrane1 2 3 4 5 6 7
GO:0031201ISSUniProtSNARE complex1 2 3 4 5 6
GO:0009506IDAUniProtplasmodesma1 2 3 4 5 6
GO:0005802IDAUniProttrans-Golgi network1 2 3 4 5 6
GO:0009504IDAUniProtcell plate1 2 3 4 5 6
GO:0016021IEAUniProtintegral to membrane1 2 3 4 5

Color Legend

Experimental Evidence
Electronic Evidence
Computational Reviewed Evidence
GO Sources:   Primary     Orthology     Homology  
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InterPro Description
IPR000727Target SNARE coiled-coil domain
IPR006012Syntaxin/epimorphin, conserved site
IPR006011Syntaxin, N-terminal domain

Mapman id Description
31.4cell.vesicle transport
No SignalP domains detected for this gene.