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1.A.1.4.4
Guard cell outward rectifying K+ out channel, GORK, controls leaf stomatal pore opening (by increasing solute content) and closing (by decreasing solute content), which in turn controls gas and water loss (Schroeder, 2003).

Accession Number:Q94A76
Protein Name:Potassium channel GORK
Length:820
Molecular Weight:94461.00
Species: [3702]
Number of TMSs:7
Location1 / Topology2 / Orientation3: Membrane1 / Multi-pass membrane protein2
Substrate K+

Cross database links:

Genevestigator: Q94A76
eggNOG: KOG0498
HEGENOM: HBG316771
RefSeq: NP_198566.2   
Entrez Gene ID: 833728   
Pfam: PF00023    PF00027    PF11834    PF00520   
KEGG: ath:AT5G37500   

Gene Ontology

GO:0016021 C:integral to membrane
GO:0005634 C:nucleus
GO:0015271 F:outward rectifier potassium channel activity
GO:0005515 F:protein binding
GO:0006813 P:potassium ion transport
GO:0009737 P:response to abscisic acid stimulus
GO:0009409 P:response to cold
GO:0009753 P:response to jasmonic acid stimulus
GO:0009414 P:response to water deprivation
GO:0055085 P:transmembrane transport

References (6)

[1] “GORK, a delayed outward rectifier expressed in guard cells of Arabidopsis thaliana, is a K(+)-selective, K(+)-sensing ion channel.”  Ache P.et.al.   11113445
[2] “Empirical analysis of transcriptional activity in the Arabidopsis genome.”  Yamada K.et.al.   14593172
[3] “K(+) channel profile and electrical properties of Arabidopsis root hairs.”  Ivashikina N.et.al.   11728473
[4] “Phylogenetic relationships within cation transporter families of Arabidopsis.”  Maeser P.et.al.   11500563
[5] “The Arabidopsis outward K(+) channel GORK is involved in regulation of stomatal movements and plant transpiration.”  Hosy E.et.al.   12671068
[6] “Regulation of the ABA-sensitive Arabidopsis potassium channel gene GORK in response to water stress.”  Becker D.et.al.   14596925

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Predict TMSs (Predict number of transmembrane segments)
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FASTA formatted sequence
1:	MGRLRRRQEI IDHEEEESND DVSSRRGKLS LAETFRWLDS SEHRRIETDG HNDYKYIIHP 
61:	KNRWYKAWEM FILVWAIYSS LFTPMEFGFF RGLPERLFVL DIVGQIAFLV DIVLQFFVAY 
121:	RDTQTYRTVY KPTRIAFRYL KSHFLMDFIG CFPWDLIYKA SGKHELVRYL LWIRLFRVRK 
181:	VVEFFQRLEK DTRINYLFTR ILKLLFVEVY CTHTAACIFY YLATTLPPEN EGYTWIGSLK 
241:	LGDYSYENFR EIDLWKRYTT ALYFAIVTMA TVGYGDIHAV NLREMIFVMI YVSFDMVLGA 
301:	YLIGNITALI VKGSNTERFR DKMNDLISFM NRKKLGRDLR SQITGHVRLQ YDSHYTDTVM 
361:	LQDIPASIRA KIAQLLYLPY IKKVPLFKGC STEFINQIVI RLHEEYFLPG EVITEQGNVV 
421:	DHLYFVCEGL LEALVTKTDG SEESVTLLGP HTSFGDISII CNISQPFTVR VCELCHLLRL 
481:	DKQSFSNILE IYFHDGRTIL NNIMEEKESN DRIKKLESDI VIHIGKQEAE LALKVNSAAF 
541:	QGDFYQLKSL IRSGADPNKT DYDGRSPLHL AACRGYEDIT LFLIQEGVDV NLKDKFGHTP 
601:	LFEAVKAGQE GVIGLLVKEG ASFNLEDSGN FLCTTVAKGD SDFLKRLLSS GMNPNSEDYD 
661:	HRTPLHVAAS EGLFLMAKML VEAGASVISK DRWGNSPLDE ARLCGNKKLI KLLEDVKNAQ 
721:	SSIYPSSLRE LQEERIERRK CTVFPFHPQE AKEERSRKHG VVVWIPSNLE KLIVTAAKEL 
781:	GLSDGASFVL LSEDQGRITD IDMISDGHKL YMISDTTDQT