UniProtKB - Q9FEB5 (DSP4_ARATH)
Phosphoglucan phosphatase DSP4, chloroplastic
DSP4
Functioni
Starch granule-associated phosphoglucan phosphatase involved in the control of starch accumulation. Acts as major regulator of the initial steps of starch degradation at the granule surface. Functions during the day by dephosphorylating the night-accumulated phospho-oligosaccharides. Can release phosphate from both the C6 and the C3 positions, but dephosphorylates preferentially the C6 position (PubMed:20018599, PubMed:26231210).
11 PublicationsMiscellaneous
Sites
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Binding sitei | 90 | Substrate; via amide nitrogenCombined sources | 1 | |
Binding sitei | 166 | SubstrateCombined sources | 1 | |
Active sitei | 198 | Phosphocysteine intermediatePROSITE-ProRule annotation6 Publications | 1 | |
Binding sitei | 307 | SubstrateCombined sources | 1 | |
Binding sitei | 332 | SubstrateCombined sources | 1 |
GO - Molecular functioni
- amylopectin binding Source: UniProtKB
- carbohydrate phosphatase activity Source: UniProtKB
- polysaccharide binding Source: TAIR
- protein tyrosine/serine/threonine phosphatase activity Source: InterPro
- starch binding Source: GO_Central
GO - Biological processi
- circadian rhythm Source: InterPro
- phosphorylated carbohydrate dephosphorylation Source: GO_Central
- starch catabolic process Source: UniProtKB
- starch metabolic process Source: TAIR
Keywordsi
Molecular function | Hydrolase, Protein phosphatase |
Biological process | Carbohydrate metabolism |
Enzyme and pathway databases
BioCyci | ARA:AT3G52180-MONOMER |
Protein family/group databases
CAZyi | CBM48, Carbohydrate-Binding Module Family 48 |
Names & Taxonomyi
Protein namesi | Recommended name: Phosphoglucan phosphatase DSP4, chloroplastic (EC:3.1.3.-6 Publications)Alternative name(s): AtPTPKIS1 Dual specificity protein phosphatase 4 Protein STARCH-EXCESS 4 Short name: AtSEX4 |
Gene namesi | Name:DSP4 Synonyms:PTPKIS1, SEX4 Ordered Locus Names:At3g52180 ORF Names:F4F15.290 |
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 | AT3G52180 |
TAIRi | locus:2083845, AT3G52180 |
Subcellular locationi
Chloroplast
- chloroplast 3 Publications
Note: Associated with starch granule.
Chloroplast
- chloroplast Source: TAIR
- chloroplast stroma Source: TAIR
Keywords - Cellular componenti
Chloroplast, PlastidPathology & Biotechi
Disruption phenotypei
Mutagenesis
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Mutagenesisi | 90 | Y → A: Reduces starch binding and glucan phosphatase activity. 1 Publication | 1 | |
Mutagenesisi | 139 | Y → A: Mildly reduces starch binding and glucan phosphatase activity. 1 Publication | 1 | |
Mutagenesisi | 140 | F → A: Reduces glucan phosphatase activity. 1 Publication | 1 | |
Mutagenesisi | 140 | F → W: Changes substrate specificity and enhances glucan dephosphorylation at C3. Leads to preferential glucan dephosphorylation at C6; when associated with G-235. 1 Publication | 1 | |
Mutagenesisi | 167 | F → M: Increases glucan phosphatase activity. 1 Publication | 1 | |
Mutagenesisi | 167 | F → S: No effect on glucan phosphatase activity. 1 Publication | 1 | |
Mutagenesisi | 167 | F → Y: Reduces glucan phosphatase activity 3-fold. 1 Publication | 1 | |
Mutagenesisi | 198 | C → S: Loss of glucan phosphatase activity. 6 Publications | 1 | |
Mutagenesisi | 200 – 203 | AGMG → TGFD: Loss of glucan phosphatase activity. 1 Publication | 4 | |
Mutagenesisi | 203 | G → D: Nearly abolishes glucan phosphatase activity. 1 Publication | 1 | |
Mutagenesisi | 235 | F → A: Slightly reduces starch binding and glucan phosphatase activity. 1 Publication | 1 | |
Mutagenesisi | 235 | F → G: Changes substrate specificity and enhances glucan dephosphorylation at C3. Leads to preferential glucan dephosphorylation at C6; when associated with W-140. 1 Publication | 1 | |
Mutagenesisi | 237 | K → A: Slightly reduces glucan phosphatase activity. 1 Publication | 1 | |
Mutagenesisi | 278 | W → A: Nearly abolishes glucan phosphatase activity. Strongly reduces starch binding efficiency. 1 Publication | 1 | |
Mutagenesisi | 278 | W → G: Reduces starch binding efficiency. 1 Publication | 1 | |
Mutagenesisi | 307 | K → A: Strongly reduces glucan phosphatase activity. Strongly reduces starch binding efficiency. 2 Publications | 1 | |
Mutagenesisi | 314 | W → A: Nearly abolishes glucan phosphatase activity. 1 Publication | 1 | |
Mutagenesisi | 329 | G → R: Loss starch-binding capacity. 1 Publication | 1 | |
Mutagenesisi | 330 | H → A: Decreases glucan phosphatase activity. 1 Publication | 1 | |
Mutagenesisi | 332 | N → A: Nearly abolishes glucan phosphatase activity. Loss of starch binding. 1 Publication | 1 | |
Mutagenesisi | 333 | N → K: Loss of glucan phosphatase activity and starch-binding capacity. 1 Publication | 1 |
PTM / Processingi
Molecule processing
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Transit peptidei | 1 – 54 | ChloroplastSequence analysisAdd BLAST | 54 | |
ChainiPRO_0000417333 | 55 – 379 | Phosphoglucan phosphatase DSP4, chloroplasticAdd BLAST | 325 |
Proteomic databases
PaxDbi | Q9FEB5 |
PRIDEi | Q9FEB5 |
Expressioni
Inductioni
Gene expression databases
ExpressionAtlasi | Q9FEB5, baseline and differential |
Genevisiblei | Q9FEB5, AT |
Interactioni
Binary interactionsi
Q9FEB5
With | #Exp. | IntAct |
---|---|---|
KIN11 [P92958] | 2 | EBI-307215,EBI-307202 |
Protein-protein interaction databases
BioGRIDi | 9701, 1 interactor |
IntActi | Q9FEB5, 1 interactor |
STRINGi | 3702.AT3G52180.1 |
Structurei
Secondary structure
3D structure databases
AlphaFoldDBi | Q9FEB5 |
SMRi | Q9FEB5 |
ModBasei | Search... |
PDBe-KBi | Search... |
Family & Domainsi
Domains and Repeats
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Domaini | 97 – 254 | Tyrosine-protein phosphatasePROSITE-ProRule annotationAdd BLAST | 158 |
Region
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Regioni | 54 – 76 | DisorderedSequence analysisAdd BLAST | 23 | |
Regioni | 199 – 204 | Substrate bindingCombined sources | 6 | |
Regioni | 259 – 335 | Polysaccharide bindingAdd BLAST | 77 | |
Regioni | 339 – 358 | DisorderedSequence analysisAdd BLAST | 20 |
Motif
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Motifi | 198 – 204 | Glucan phosphatase signature motif CXAGXGR1 Publication | 7 |
Compositional bias
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Compositional biasi | 343 – 358 | Basic and acidic residuesSequence analysisAdd BLAST | 16 |
Domaini
Keywords - Domaini
Transit peptidePhylogenomic databases
eggNOGi | KOG1616, Eukaryota KOG1716, Eukaryota |
HOGENOMi | CLU_047075_2_0_1 |
InParanoidi | Q9FEB5 |
PhylomeDBi | Q9FEB5 |
Family and domain databases
CDDi | cd14526, DSP_laforin-like, 1 hit |
Gene3Di | 2.60.40.10, 1 hit 3.90.190.10, 1 hit |
InterProi | View protein in InterPro IPR032640, AMPK1_CBM IPR030079, DSP4 IPR045204, DSP_laforin-like IPR000340, Dual-sp_phosphatase_cat-dom IPR013783, Ig-like_fold IPR014756, Ig_E-set IPR029021, Prot-tyrosine_phosphatase-like IPR000387, Tyr_Pase_dom IPR020422, TYR_PHOSPHATASE_DUAL_dom |
PANTHERi | PTHR46642:SF3, PTHR46642:SF3, 1 hit |
Pfami | View protein in Pfam PF16561, AMPK1_CBM, 1 hit PF00782, DSPc, 1 hit |
SMARTi | View protein in SMART SM00195, DSPc, 1 hit |
SUPFAMi | SSF52799, SSF52799, 1 hit SSF81296, SSF81296, 1 hit |
PROSITEi | View protein in PROSITE PS50056, TYR_PHOSPHATASE_2, 1 hit PS50054, TYR_PHOSPHATASE_DUAL, 1 hit |
(1+)i Sequence
Sequence statusi: Complete.
: The displayed sequence is further processed into a mature form. Sequence processingi
This entry describes 1 produced by isoform ialternative splicing. AlignAdd to basketThis entry has 1 described isoform and 3 potential isoforms that are computationally mapped.Show allAlign All
This isoform has been chosen as the sequence. All positional information in this entry refers to it. This is also the sequence that appears in the downloadable versions of the entry. canonicali
10 20 30 40 50
MNCLQNLPRC SVSPLLGFGC IQRDHSSSSS SLKMLISPPI KANDPKSRLV
60 70 80 90 100
LHAVSESKSS SEMSGVAKDE EKSDEYSQDM TQAMGAVLTY RHELGMNYNF
110 120 130 140 150
IRPDLIVGSC LQTPEDVDKL RKIGVKTIFC LQQDPDLEYF GVDISSIQAY
160 170 180 190 200
AKKYSDIQHI RCEIRDFDAF DLRMRLPAVV GTLYKAVKRN GGVTYVHCTA
210 220 230 240 250
GMGRAPAVAL TYMFWVQGYK LMEAHKLLMS KRSCFPKLDA IRNATIDILT
260 270 280 290 300
GLKRKTVTLT LKDKGFSRVE ISGLDIGWGQ RIPLTLDKGT GFWILKRELP
310 320 330 340 350
EGQFEYKYII DGEWTHNEAE PFIGPNKDGH TNNYAKVVDD PTSVDGTTRE
360 370
RLSSEDPELL EEERSKLIQF LETCSEAEV
Computationally mapped potential isoform sequencesi
There are 3 potential isoforms mapped to this entry.BLASTAlignShow allAdd to basketA0A1I9LQR5 | A0A1I9LQR5_ARATH | Dual specificity protein phosphatas... | SEX4 ATPTPKIS1, ATSEX4, DSP4, STARCH-EXCESS 4, At3g52180 | 284 | Annotation score: | ||
F4J5T0 | F4J5T0_ARATH | Dual specificity protein phosphatas... | SEX4 ATPTPKIS1, ATSEX4, DSP4, STARCH-EXCESS 4, At3g52180 | 292 | Annotation score: | ||
A0A1I9LQR6 | A0A1I9LQR6_ARATH | Dual specificity protein phosphatas... | SEX4 ATPTPKIS1, ATSEX4, DSP4, STARCH-EXCESS 4, At3g52180 | 281 | Annotation score: |
Sequence cautioni
Experimental Info
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Sequence conflicti | 64 | S → R in AAL27495 (PubMed:14593172).Curated | 1 | |
Sequence conflicti | 64 | S → R in AAN28817 (PubMed:14593172).Curated | 1 | |
Sequence conflicti | 84 | M → K in AAM61237 (Ref. 5) Curated | 1 | |
Sequence conflicti | 287 | D → G in AAL27495 (PubMed:14593172).Curated | 1 | |
Sequence conflicti | 287 | D → G in AAN28817 (PubMed:14593172).Curated | 1 |
Sequence databases
Select the link destinations: EMBLi GenBanki DDBJi Links Updated | AJ302781 mRNA Translation: CAC17593.1 AJ302779 Genomic DNA Translation: CAC18327.1 Sequence problems. AJ302779 Genomic DNA Translation: CAC18328.1 AL049711 Genomic DNA Translation: CAB41338.1 Sequence problems. CP002686 Genomic DNA Translation: AEE78909.1 AF439823 mRNA Translation: AAL27495.1 AY143878 mRNA Translation: AAN28817.1 AY084675 mRNA Translation: AAM61237.1 |
PIRi | T49097 |
RefSeqi | NP_566960.1, NM_115078.4 [Q9FEB5-1] |
Genome annotation databases
EnsemblPlantsi | AT3G52180.1; AT3G52180.1; AT3G52180 [Q9FEB5-1] |
GeneIDi | 824383 |
Gramenei | AT3G52180.1; AT3G52180.1; AT3G52180 [Q9FEB5-1] |
KEGGi | ath:AT3G52180 |
Keywords - Coding sequence diversityi
Alternative splicingSimilar proteinsi
Cross-referencesi
Sequence databases
Select the link destinations: EMBLi GenBanki DDBJi Links Updated | AJ302781 mRNA Translation: CAC17593.1 AJ302779 Genomic DNA Translation: CAC18327.1 Sequence problems. AJ302779 Genomic DNA Translation: CAC18328.1 AL049711 Genomic DNA Translation: CAB41338.1 Sequence problems. CP002686 Genomic DNA Translation: AEE78909.1 AF439823 mRNA Translation: AAL27495.1 AY143878 mRNA Translation: AAN28817.1 AY084675 mRNA Translation: AAM61237.1 |
PIRi | T49097 |
RefSeqi | NP_566960.1, NM_115078.4 [Q9FEB5-1] |
3D structure databases
Select the link destinations: PDBei RCSB PDBi PDBji Links Updated | PDB entry | Method | Resolution (Å) | Chain | Positions | PDBsum |
3NME | X-ray | 2.40 | A/B | 90-379 | [»] | |
4PYH | X-ray | 1.65 | A | 90-379 | [»] | |
AlphaFoldDBi | Q9FEB5 | |||||
SMRi | Q9FEB5 | |||||
ModBasei | Search... | |||||
PDBe-KBi | Search... |
Protein-protein interaction databases
BioGRIDi | 9701, 1 interactor |
IntActi | Q9FEB5, 1 interactor |
STRINGi | 3702.AT3G52180.1 |
Protein family/group databases
CAZyi | CBM48, Carbohydrate-Binding Module Family 48 |
Proteomic databases
PaxDbi | Q9FEB5 |
PRIDEi | Q9FEB5 |
Genome annotation databases
EnsemblPlantsi | AT3G52180.1; AT3G52180.1; AT3G52180 [Q9FEB5-1] |
GeneIDi | 824383 |
Gramenei | AT3G52180.1; AT3G52180.1; AT3G52180 [Q9FEB5-1] |
KEGGi | ath:AT3G52180 |
Organism-specific databases
Araporti | AT3G52180 |
TAIRi | locus:2083845, AT3G52180 |
Phylogenomic databases
eggNOGi | KOG1616, Eukaryota KOG1716, Eukaryota |
HOGENOMi | CLU_047075_2_0_1 |
InParanoidi | Q9FEB5 |
PhylomeDBi | Q9FEB5 |
Enzyme and pathway databases
BioCyci | ARA:AT3G52180-MONOMER |
Miscellaneous databases
PROi | PR:Q9FEB5 |
Gene expression databases
ExpressionAtlasi | Q9FEB5, baseline and differential |
Genevisiblei | Q9FEB5, AT |
Family and domain databases
CDDi | cd14526, DSP_laforin-like, 1 hit |
Gene3Di | 2.60.40.10, 1 hit 3.90.190.10, 1 hit |
InterProi | View protein in InterPro IPR032640, AMPK1_CBM IPR030079, DSP4 IPR045204, DSP_laforin-like IPR000340, Dual-sp_phosphatase_cat-dom IPR013783, Ig-like_fold IPR014756, Ig_E-set IPR029021, Prot-tyrosine_phosphatase-like IPR000387, Tyr_Pase_dom IPR020422, TYR_PHOSPHATASE_DUAL_dom |
PANTHERi | PTHR46642:SF3, PTHR46642:SF3, 1 hit |
Pfami | View protein in Pfam PF16561, AMPK1_CBM, 1 hit PF00782, DSPc, 1 hit |
SMARTi | View protein in SMART SM00195, DSPc, 1 hit |
SUPFAMi | SSF52799, SSF52799, 1 hit SSF81296, SSF81296, 1 hit |
PROSITEi | View protein in PROSITE PS50056, TYR_PHOSPHATASE_2, 1 hit PS50054, TYR_PHOSPHATASE_DUAL, 1 hit |
MobiDBi | Search... |
Entry informationi
Entry namei | DSP4_ARATH | |
Accessioni | Q9FEB5Primary (citable) accession number: Q9FEB5 Secondary accession number(s): Q8LFS3 Q9SUY7 | |
Entry historyi | Integrated into UniProtKB/Swiss-Prot: | May 16, 2012 |
Last sequence update: | March 1, 2001 | |
Last modified: | May 25, 2022 | |
This is version 130 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
3D-structure, Reference proteomeDocuments
- Arabidopsis thaliana
Arabidopsis thaliana: entries and gene names - PDB cross-references
Index of Protein Data Bank (PDB) cross-references