UniProtKB - Q2MHE4 (HT1_ARATH)
Protein
Serine/threonine/tyrosine-protein kinase HT1
Gene
HT1
Organism
Arabidopsis thaliana (Mouse-ear cress)
Status
Functioni
Serine/threonine/tyrosine kinase involved in the control of stomatal movement in response to CO2 (PubMed:16518390, PubMed:27694184, PubMed:27923039, PubMed:30361234). Functions as a major negative regulator of CO2-induced stomatal closing (PubMed:16518390). Does not seem to be involved in stomatal closure in response to abscisic acid (ABA) or light (PubMed:16518390). Involved in the control of red light-induced stomatal opening (PubMed:26192339). Is epistatic to SRK2E/OST1 function during stomatal responses to red light and altered CO2 (PubMed:26192339). Phosphorylates SRK2E/OST1 and GHR1 to prevents SRK2E/OST1- and GHR1-induced activation of SLAC1, thus preventing stomatal closure (PubMed:25599916, PubMed:27694184, PubMed:30361234).6 Publications
Miscellaneous
'Suu' means 'mouth' in both Estonian and Finnish.1 Publication
Catalytic activityi
- ATP + L-seryl-[protein] = ADP + H+ + O-phospho-L-seryl-[protein]PROSITE-ProRule annotation3 PublicationsEC:2.7.11.1PROSITE-ProRule annotation3 Publications
- ATP + L-threonyl-[protein] = ADP + H+ + O-phospho-L-threonyl-[protein]PROSITE-ProRule annotation3 PublicationsEC:2.7.11.1PROSITE-ProRule annotation3 Publications
- EC:2.7.10.11 Publication
Activity regulationi
Inhibited by MPK4 and MPK12.2 Publications
Sites
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Binding sitei | 113 | ATPPROSITE-ProRule annotation | 1 | |
Active sitei | 212 | Proton acceptorPROSITE-ProRule annotation | 1 |
Regions
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Nucleotide bindingi | 92 – 100 | ATPPROSITE-ProRule annotation | 9 |
GO - Molecular functioni
- ATP binding Source: UniProtKB-KW
- protein kinase activity Source: UniProtKB
- protein serine/threonine kinase activity Source: UniProtKB
- protein serine kinase activity Source: UniProtKB-EC
- protein threonine kinase activity Source: UniProtKB-EC
- transmembrane receptor protein tyrosine kinase activity Source: UniProtKB-EC
GO - Biological processi
- cellular response to carbon dioxide Source: UniProtKB
- protein autophosphorylation Source: UniProtKB
- regulation of response to red or far red light Source: UniProtKB
- regulation of stomatal closure Source: UniProtKB
- regulation of stomatal movement Source: UniProtKB
- signal transduction Source: GO_Central
Keywordsi
Molecular function | Kinase, Serine/threonine-protein kinase, Transferase, Tyrosine-protein kinase |
Ligand | ATP-binding, Nucleotide-binding |
Names & Taxonomyi
Protein namesi | |
Gene namesi | Name:HT11 Publication Synonyms:SUU1 Publication Ordered Locus Names:At1g62400Imported ORF Names:F24O1.13Imported |
Organismi | Arabidopsis thaliana (Mouse-ear cress) |
Taxonomic identifieri | 3702 [NCBI] |
Taxonomic lineagei | Eukaryota › Viridiplantae › Streptophyta › Embryophyta › Tracheophyta › Spermatophyta › Magnoliopsida › eudicotyledons › Gunneridae › Pentapetalae › rosids › malvids › Brassicales › Brassicaceae › Camelineae › Arabidopsis |
Proteomesi |
|
Organism-specific databases
Araporti | AT1G62400 |
Subcellular locationi
Plasma membrane
- Cell membrane 1 Publication
Plasma Membrane
- plasma membrane Source: UniProtKB
Other locations
- cytoplasm Source: GO_Central
Keywords - Cellular componenti
Cell membrane, MembranePathology & Biotechi
Mutagenesis
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Mutagenesisi | 109 | A → V in suu/ht1-8D; dominant mutation leading to constitutively open stomata and subsequent high stomatal conductance, and impaired stomatal CO(2) responses. Reduced binding and inhibition by MPK4 and MPK12. 1 Publication | 1 | |
Mutagenesisi | 113 | K → M: Loss of kinase activity. Impaired MPK12-mediated phosphorylation. 1 Publication | 1 | |
Mutagenesisi | 113 | K → W: Loss of kinase activity, induces a disrupted CO(2) response. 1 Publication | 1 | |
Mutagenesisi | 136 – 149 | Missing in ht1-2; loss of kinase activity. Impaired ability to control stomatal movements in response to CO(2) but normal responses to blue light, fusicoccin and abscisic acid (ABA). Tightly closed stomata. 2 PublicationsAdd BLAST | 14 | |
Mutagenesisi | 211 | R → K in ht1-1; impairs the ability to control stomatal movements in response to CO(2) probably due to loss of protein kinase activity. 1 Publication | 1 |
PTM / Processingi
Molecule processing
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
ChainiPRO_0000235238 | 1 – 390 | Serine/threonine/tyrosine-protein kinase HT1Add BLAST | 390 |
Post-translational modificationi
Autophosphorylated.3 Publications
Keywords - PTMi
PhosphoproteinProteomic databases
PaxDbi | Q2MHE4 |
PRIDEi | Q2MHE4 |
ProteomicsDBi | 230272 |
Expressioni
Tissue specificityi
Mainly localizes in guard cells. Expressed at low level in leaves, stems, roots and flowers.1 Publication
Gene expression databases
ExpressionAtlasi | Q2MHE4, baseline and differential |
Genevisiblei | Q2MHE4, AT |
Interactioni
Subunit structurei
Binary interactionsi
Q2MHE4
With | #Exp. | IntAct |
---|---|---|
SRK2E [Q940H6] | 2 | EBI-11174828,EBI-782514 |
Protein-protein interaction databases
IntActi | Q2MHE4, 2 interactors |
STRINGi | 3702.AT1G62400.1 |
Family & Domainsi
Domains and Repeats
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Domaini | 86 – 359 | Protein kinasePROSITE-ProRule annotationAdd BLAST | 274 |
Sequence similaritiesi
Phylogenomic databases
eggNOGi | KOG0192, Eukaryota |
HOGENOMi | CLU_000288_7_35_1 |
InParanoidi | Q2MHE4 |
OMAi | IACQKEP |
OrthoDBi | 938929at2759 |
PhylomeDBi | Q2MHE4 |
Family and domain databases
InterProi | View protein in InterPro IPR011009, Kinase-like_dom_sf IPR000719, Prot_kinase_dom IPR001245, Ser-Thr/Tyr_kinase_cat_dom IPR008271, Ser/Thr_kinase_AS |
Pfami | View protein in Pfam PF07714, PK_Tyr_Ser-Thr, 1 hit |
PRINTSi | PR00109, TYRKINASE |
SMARTi | View protein in SMART SM00220, S_TKc, 1 hit |
SUPFAMi | SSF56112, SSF56112, 1 hit |
PROSITEi | View protein in PROSITE PS50011, PROTEIN_KINASE_DOM, 1 hit PS00108, PROTEIN_KINASE_ST, 1 hit |
i Sequence
Sequence statusi: Complete.
Q2MHE4-1 [UniParc]FASTAAdd to basket
10 20 30 40 50
MSGLCFNPFR LRWSLRSKLP LEPSLPNLPC NPSSSKTNRY AEAETMEKKR
60 70 80 90 100
FDSMESWSMI LESENVETWE ASKGEREEWT ADLSQLFIGN KFASGAHSRI
110 120 130 140 150
YRGIYKQRAV AVKMVRIPTH KEETRAKLEQ QFKSEVALLS RLFHPNIVQF
160 170 180 190 200
IAACKKPPVY CIITEYMSQG NLRMYLNKKE PYSLSIETVL RLALDISRGM
210 220 230 240 250
EYLHSQGVIH RDLKSNNLLL NDEMRVKVAD FGTSCLETQC REAKGNMGTY
260 270 280 290 300
RWMAPEMIKE KPYTRKVDVY SFGIVLWELT TALLPFQGMT PVQAAFAVAE
310 320 330 340 350
KNERPPLPAS CQPALAHLIK RCWSENPSKR PDFSNIVAVL EKYDECVKEG
360 370 380 390
LPLTSHASLT KTKKAILDHL KGCVTSISSP FSSSSVPVNA
Sequence cautioni
The sequence AAF70839 differs from that shown. Reason: Erroneous gene model prediction.Curated
Sequence databases
Select the link destinations: EMBLi GenBanki DDBJi Links Updated | AB221045 Genomic DNA Translation: BAE75921.1 AC003113 Genomic DNA Translation: AAF70839.1 Sequence problems. CP002684 Genomic DNA Translation: AEE33962.2 |
PIRi | T01451 |
RefSeqi | NP_176430.2, NM_104920.3 |
Genome annotation databases
EnsemblPlantsi | AT1G62400.1; AT1G62400.1; AT1G62400 |
GeneIDi | 842538 |
Gramenei | AT1G62400.1; AT1G62400.1; AT1G62400 |
KEGGi | ath:AT1G62400 |
Similar proteinsi
Cross-referencesi
Sequence databases
Select the link destinations: EMBLi GenBanki DDBJi Links Updated | AB221045 Genomic DNA Translation: BAE75921.1 AC003113 Genomic DNA Translation: AAF70839.1 Sequence problems. CP002684 Genomic DNA Translation: AEE33962.2 |
PIRi | T01451 |
RefSeqi | NP_176430.2, NM_104920.3 |
3D structure databases
SMRi | Q2MHE4 |
ModBasei | Search... |
Protein-protein interaction databases
IntActi | Q2MHE4, 2 interactors |
STRINGi | 3702.AT1G62400.1 |
Proteomic databases
PaxDbi | Q2MHE4 |
PRIDEi | Q2MHE4 |
ProteomicsDBi | 230272 |
Genome annotation databases
EnsemblPlantsi | AT1G62400.1; AT1G62400.1; AT1G62400 |
GeneIDi | 842538 |
Gramenei | AT1G62400.1; AT1G62400.1; AT1G62400 |
KEGGi | ath:AT1G62400 |
Organism-specific databases
Araporti | AT1G62400 |
Phylogenomic databases
eggNOGi | KOG0192, Eukaryota |
HOGENOMi | CLU_000288_7_35_1 |
InParanoidi | Q2MHE4 |
OMAi | IACQKEP |
OrthoDBi | 938929at2759 |
PhylomeDBi | Q2MHE4 |
Miscellaneous databases
PROi | PR:Q2MHE4 |
Gene expression databases
ExpressionAtlasi | Q2MHE4, baseline and differential |
Genevisiblei | Q2MHE4, AT |
Family and domain databases
InterProi | View protein in InterPro IPR011009, Kinase-like_dom_sf IPR000719, Prot_kinase_dom IPR001245, Ser-Thr/Tyr_kinase_cat_dom IPR008271, Ser/Thr_kinase_AS |
Pfami | View protein in Pfam PF07714, PK_Tyr_Ser-Thr, 1 hit |
PRINTSi | PR00109, TYRKINASE |
SMARTi | View protein in SMART SM00220, S_TKc, 1 hit |
SUPFAMi | SSF56112, SSF56112, 1 hit |
PROSITEi | View protein in PROSITE PS50011, PROTEIN_KINASE_DOM, 1 hit PS00108, PROTEIN_KINASE_ST, 1 hit |
ProtoNeti | Search... |
MobiDBi | Search... |
Entry informationi
Entry namei | HT1_ARATH | |
Accessioni | Q2MHE4Primary (citable) accession number: Q2MHE4 Secondary accession number(s): F4HYS2, Q9MAV2 | |
Entry historyi | Integrated into UniProtKB/Swiss-Prot: | May 16, 2006 |
Last sequence update: | February 21, 2006 | |
Last modified: | February 10, 2021 | |
This is version 105 of the entry and version 1 of the sequence. See complete history. | ||
Entry statusi | Reviewed (UniProtKB/Swiss-Prot) | |
Annotation program | Plant Protein Annotation Program |
Miscellaneousi
Keywords - Technical termi
Reference proteomeDocuments
- Arabidopsis thaliana
Arabidopsis thaliana: entries and gene names - SIMILARITY comments
Index of protein domains and families