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Information on EC 2.7.9.4 - alpha-glucan, water dikinase and Organism(s) Solanum tuberosum and UniProt Accession Q9AWA5

for references in articles please use BRENDA:EC2.7.9.4
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EC Tree
IUBMB Comments
Requires Mg2+. ATP appears to be the only phosphate donor. No activity could be detected using GTP, UTP, phosphoenolpyruvate or diphosphate . The protein phosphorylates glucans exclusively on O-6 of glucosyl residues . The protein phosphorylates itself with the beta-phosphate of ATP, which is then transferred to the glucan .
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This record set is specific for:
Solanum tuberosum
UNIPROT: Q9AWA5
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Word Map
The taxonomic range for the selected organisms is: Solanum tuberosum
The expected taxonomic range for this enzyme is: Eukaryota, Bacteria
Synonyms
r1 protein, glucan water dikinase, alpha-glucan water dikinase, atgwd3, atgwd2, starch-related r1 protein, glucan water dikinase 2, glucan water dikinase 3, starch-related alpha-glucan/water dikinase, more
SYNONYM
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
alpha-glucan water dikinase
-
alpha-glucan water dikinase 1
-
CBM45-2A
domain
glucan water dikinase
-
alpha-glucan, water dikinase, GWD
-
-
-
-
glucan water dikinase
-
-
glucan, water dikinase
-
-
starch-granule-bound R1 protein
-
starch-related R1 protein
-
-
-
-
REACTION
REACTION DIAGRAM
COMMENTARY hide
ORGANISM
UNIPROT
LITERATURE
ATP + alpha-glucan + H2O = AMP + phospho-alpha-glucan + phosphate
show the reaction diagram
ping-pong reaction mechanism
-
REACTION TYPE
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
esterification
-
-
methyl group transfer
-
-
-
-
PATHWAY SOURCE
PATHWAYS
-
-
SYSTEMATIC NAME
IUBMB Comments
ATP:alpha-glucan, water phosphotransferase
Requires Mg2+. ATP appears to be the only phosphate donor. No activity could be detected using GTP, UTP, phosphoenolpyruvate or diphosphate [1]. The protein phosphorylates glucans exclusively on O-6 of glucosyl residues [2]. The protein phosphorylates itself with the beta-phosphate of ATP, which is then transferred to the glucan [1].
SUBSTRATE
PRODUCT                       
REACTION DIAGRAM
ORGANISM
UNIPROT
COMMENTARY
(Substrate) hide
LITERATURE
(Substrate)
COMMENTARY
(Product) hide
LITERATURE
(Product)
Reversibility
r=reversible
ir=irreversible
?=not specified
amylopectin + ATP + H2O
AMP + phospho-amylopectin + phosphate
show the reaction diagram
-
-
-
?
ATP + 6-O-alpha-maltosyl-beta-cyclodextrin + H2O
AMP + phospho-6-O-alpha-maltosyl-beta-cyclodextrin + phosphate
show the reaction diagram
-
-
-
?
ATP + alpha-cyclodextrin + H2O
AMP + phospho-alpha-cyclodextrin + phosphate
show the reaction diagram
-
-
-
?
ATP + alpha-glucan + H2O
AMP + phospho-alpha-glucan + phosphate
show the reaction diagram
ATP + amylose 18 + H2O
AMP + phosphorylated amylose 18 + phosphate
show the reaction diagram
-
very poor substrate
-
?
ATP + amylose 24 + H2O
AMP + phosphorylated amylose 24 + phosphate
show the reaction diagram
-
very poor substrate
-
?
ATP + amylose 53 + H2O
AMP + phosphorylated amylose 53 + phosphate
show the reaction diagram
-
-
-
?
ATP + amylose 85 + H2O
AMP + phosphorylated amylose 85 + phosphate
show the reaction diagram
-
-
-
?
ATP + beta-cyclodextrin + H2O
AMP + phospho-beta-cyclodextrin + phosphate
show the reaction diagram
-
-
-
?
ATP + granular potato starch + H2O
AMP + phosphorylated granular potato starch + phosphate
show the reaction diagram
-
-
-
?
ATP + potato amylopektin + H2O
AMP + phosphorylated potato amylopektin + phosphate
show the reaction diagram
-
-
-
?
ATP + potato amylose + H2O
AMP + phosphorylated potato amylose + phosphate
show the reaction diagram
-
-
-
?
ATP + starch + H2O
AMP + phosphorylated starch + phosphate
show the reaction diagram
-
-
-
?
amylopectin + ATP + H2O
AMP + phospho-amylopectin + phosphate
show the reaction diagram
-
-
-
-
?
ATP + alpha-glucan + H2O
AMP + phospho-alpha-glucan + phosphate
show the reaction diagram
ATP + amylopectin + H2O
AMP + phospho-amylopectin + phosphate
show the reaction diagram
-
-
-
-
?
ATP + crystalline maltodextrin + H2O
AMP + phosphorylated crystalline maltodextrin + phosphate
show the reaction diagram
-
-
-
-
?
ATP + elongated glucogen + H2O
AMP + elongated phosphoglucogen + phosphate
show the reaction diagram
-
-
-
-
?
ATP + maltodextrin + H2O
?
show the reaction diagram
-
crystallized maltodextrins, A- and B-type allomorphs
-
-
?
ATP + postelongated glycogen + H2O
AMP + postelongated phospho-glycogen + phosphate
show the reaction diagram
-
-
-
-
?
ATP + starch + H2O
AMP + phosphorylated starch + phosphate
show the reaction diagram
-
-
-
-
?
additional information
?
-
NATURAL SUBSTRATE
NATURAL PRODUCT
REACTION DIAGRAM
ORGANISM
UNIPROT
COMMENTARY
(Substrate) hide
LITERATURE
(Substrate)
COMMENTARY
(Product) hide
LITERATURE
(Product)
REVERSIBILITY
r=reversible
ir=irreversible
?=not specified
ATP + alpha-glucan + H2O
AMP + phospho-alpha-glucan + phosphate
show the reaction diagram
amylopectin + ATP + H2O
AMP + phospho-amylopectin + phosphate
show the reaction diagram
-
-
-
-
?
ATP + alpha-glucan + H2O
AMP + phospho-alpha-glucan + phosphate
show the reaction diagram
-
-
-
?
additional information
?
-
COFACTOR
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
IMAGE
METALS and IONS
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
Mg2+
-
essential for activity
INHIBITOR
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
IMAGE
EARLY STARVATION1
i.e. ESV1, a 50000 Da starch-binding protein. Decreases action of glucan, water dikinase. ESV1 does not affect the autophosphorylation of glucan, water dikinase
-
soluble maltodextrin
-
-
-
ACTIVATING COMPOUND
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
IMAGE
thioredoxin
-
starch granule-bound enzyme, isolated from dark-adapted plants exists in the inactive, oxidized form, which is capable of reactivation upon treatment with reduced thioredoxin
additional information
-
presence of beta-amylase BAM1 or BAM3 strongly stimulates enzyme-catalyzed phosphorylation
-
KM VALUE [mM]
SUBSTRATE
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
IMAGE
0.00023
ATP
-
-
TURNOVER NUMBER [1/s]
SUBSTRATE
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
IMAGE
0.015
granular potato starch
30°C
-
SPECIFIC ACTIVITY [µmol/min/mg]
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
0.07
30°C, wild-type, substrate potato amylose
0.14
30°C, fragment N11, substrate potato amylose
0.2
30°C, wild-type, substrate amylose 53
0.41
30°C, wild-type, substrate amylose 85
1.01
30°C, fragment N11, substrate amylose 53
1.18
30°C, fragment N11, substrate amylose 85
3.26
30°C, wild-type, substrate potato amylopektin
5.8
30°C, wild-type, substrate granular potato starch
6.19
30°C, fragment N11, substrate potato amylopektin
pH OPTIMUM
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
7.5
-
activity assay
TEMPERATURE OPTIMUM
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
30
-
activity assay
TEMPERATURE RANGE
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
20 - 40
20°C: about 75% of maximal activity, 40°C: about 85% of maximal activity
ORGANISM
COMMENTARY hide
LITERATURE
UNIPROT
SEQUENCE DB
SOURCE
SOURCE TISSUE
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
SOURCE
additional information
no enzyme transcript in leaves
Manually annotated by BRENDA team
LOCALIZATION
ORGANISM
UNIPROT
COMMENTARY hide
GeneOntology No.
LITERATURE
SOURCE
nonamylolytic, starch granule-associated protein in potato. Phosphorylated glucans are more abundant at the granule surface of potato leaf starch during the beginning of starch mobilization
-
Manually annotated by BRENDA team
-
starch granule-bound enzyme, isolated from dark-adapted plants exists in the inactive, oxidized form, which is capable of reactivation upon treatment with reduced thioredoxin
Manually annotated by BRENDA team
GENERAL INFORMATION
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
evolution
significant diversity in the evolution of alpha-glucan, water dikinase enzymes across plant species may be evolutionarily advantageous according to the varying needs for phosphorylated stored starch between plants and environments. Computational approaches to compare the enzyme sequences of 48 plant species provide an insight into the evolutionary variation in catalytic activity of alpha-glucan, water dikinase among plants. Deleterious mutations are identified for some plants at various positions of the five aromatic amino acids, which are highly conserved in tandems of CBM45 and vital for binding of the enzymes to starch. These mutations may be responsible for altered carbohydrate binding activity of alpha-glucan, water dikinase in plants, thereby affecting phosphorylation of transit and stored starch
malfunction
melting enthalpy and crystallinity of purified starches are higher if GWD-mediated starch phosphorylation is suppressed. R1 reduction results in a starch excess phenotype in leaves, e.g., the accumulation of high amounts of starch at the end of a normal dark phase because of the decreased rates of leaf starch degradation. In addition, the lowered expression of R1 in these plants is accompanied by a reduction in cold-induced sweeting in tubers. Transgenic potato plants with reduced StGWD expression, show impeded starch degradation and an overall reduction in starch phosphate content. In transgenic potato lines with reduced expression of StGWD, small alteration in storage starch metabolism is reported
metabolism
physiological function
the starch-related dikinase utilizes ATP as dual phosphate donor transferring the terminal gamma-phosphate group to water selectively to C6 position of a glucosyl residue within amylopectin. The action of the dikinase is restricted to the granule surface and glucan chains exposed at the surface account only for a minor proportion of the entire granule. Glucan chains that are phosphorylated by the dikinase remain covalently linked to the insoluble starch particle. In potato tuber starch, about 1% of the glucosyl residues are phosphorylated, respectively
metabolism
-
GWD1 phosphorylates highly ordered, insoluble starch, and glucan phosphorylation at the C-6 position results in a transition state of the phosphoglucans,´which is less ordered but still insoluble. This specific state of the starch granule is an appropriate substrate for phosphoglucan, water dikinase GWD3 catalysis (C-3 phosphorylation) after which the phosphoglucan finally becomes soluble
physiological function
enzyme GWD catalyzes starch phosphorylation both in leaves and different plant storage organs
additional information
UNIPROT
ENTRY NAME
ORGANISM
NO. OF AA
NO. OF TRANSM. HELICES
MOLECULAR WEIGHT[Da]
SOURCE
SEQUENCE
LOCALIZATION PREDICTION?
GWD1_SOLTU
1464
0
163237
Swiss-Prot
Chloroplast (Reliability: 4)
MOLECULAR WEIGHT
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
163261
calculated from sequence
330000
gel filtration
152000
-
multi-angle laser light scattering after gel-filtration
155000
x * 155000, SDS-PAGE
160000
SUBUNIT
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
?
x * 155000, SDS-PAGE
monomer
-
152000, multi-angle laser light scattering
POSTTRANSLATIONAL MODIFICATION
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
phosphoprotein
phosphoprotein
PROTEIN VARIANTS
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
H992A
mutant enzyme backgroun level of activity, no autophosphorylation
W117A
mutation in tandem repeat sequence SBD-1, mutant shows extremely weak glucan binding
W62A
mutation in tandem repeat sequence SBD-1, mutant shows extremely weak glucan binding
additional information
TEMPERATURE STABILITY
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
45
5 min, about 15% loss of activity
50
5 min, about 40% loss of activity
55
5 min, complete loss of activity
PURIFICATION (Commentary)
ORGANISM
UNIPROT
LITERATURE
HisTrap column chromatography and Mono Q column chromatography
wild-type and mutant enzyme H992A
Ni-nitrilotriacetic acid column chromatography, and gel filtration
-
recombinant enzyme, homogenous
-
recombinant enzyme, partially
-
CLONED (Commentary)
ORGANISM
UNIPROT
LITERATURE
expressed in Escherichia coli BL21 cells and in Nicotiana tabacum leaf mesophyll cells
expression in Escherichia coli
gene GWD, genotyping included determination of allele dosage of 193 potato lines by amplicon sequencing and microsatellite analysis, overview
expressed in Escherichia coli
-
expressed in Escherichia coli BL21(DE3) cells
-
gene R1 or GWD, DNA and amino acid sequence determination and analysis by reverse transcription PCR approach using tuber RNA, detailed sequence comparison and phylogenetic analysis, semi-quantitative RT-PCR gene expression analysis
EXPRESSION
ORGANISM
UNIPROT
LITERATURE
isoform GWD1 expression reaches its maximum after 10 h of illumination, The lowest expression of isoform GWD1 occurs 4 h after turning the light on, and it is approximately 7times lower than the expression measured 6 h late
-
APPLICATION
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
food industry
rice starch contains only low concentrations of starch bound phosphate monoesters, which limits its usage in various industrial processes. Six stable individual transgenic lines with hyper-phosphorylated starch are produced by the overexpression of the StGWD1 in rice (Oryza sativa japonica cv. Zhonghua 11). The transgenic lines have 9fold and double higher Glc-6-P and Glc-3-P, respectively and increased amylose content. The starch granules display only minor morphological alterations, notably the presence of surface pores and moderately distorted edges and surfaces. The novel starch introduces unique combinations of functionality for rice starch, such as reduced gelatinization temperature, decreased pasting viscosity, increased gel formation capacity and increased gel hardness
REF.
AUTHORS
TITLE
JOURNAL
VOL.
PAGES
YEAR
ORGANISM (UNIPROT)
PUBMED ID
SOURCE
Ritte, G.; Eckermann, N.; Haebel, S.; Lorberth, R.; Steup, M.
Compartmentation of the starch-related R1 protein in higher plants
Starch Staerke
52
179-185
2000
Solanum tuberosum
-
Manually annotated by BRENDA team
Ritte, G.; Lorberth, R.; Steup, M.
Reversible binding of the starch-related R1 protein to the surface of transitory starch granules
Plant J.
21
387-391
2000
Pisum sativum, Solanum tuberosum
Manually annotated by BRENDA team
Ritte, G.; Lloyd, J.R.; Eckermann, N.; Rottmann, A.; Kossmann, J.; Steup, M.
The starch-related R1 protein is an alpha-glucan, water dikinase
Proc. Natl. Acad. Sci. USA
99
7166-7171
2002
Solanum tuberosum
Manually annotated by BRENDA team
Ritte, G.; Steup, M.; Kossmann, J.; Lloyd James, R.
Determination of the starch-phosphorylating enzyme activity in plant extracts
Planta
216
798-801
2003
Arabidopsis thaliana, Solanum tuberosum
Manually annotated by BRENDA team
Mikkelsen, R.; Baunsgaard, L.; Blennow, A.
Functional characterization of alpha-glucan,water dikinase, the starch phosphorylating enzyme
Biochem. J.
377
525-532
2004
Solanum tuberosum (Q9AWA5)
Manually annotated by BRENDA team
Mikkelsen, R.; Blennow, A.
Functional domain organization of the potato alpha-glucan, water dikinase (GWD): evidence for separate site catalysis as revealed by limited proteolysis and deletion mutants
Biochem. J.
385
355-361
2005
Solanum tuberosum
Manually annotated by BRENDA team
Mikkelsen, R.; Mutenda, K.E.; Mant, A.; Schurmann, P.; Blennow, A.
alpha-Glucan, water dikinase (GWD): a plastidic enzyme with redox-regulated and coordinated catalytic activity and binding affinity
Proc. Natl. Acad. Sci. USA
102
1785-1790
2005
Solanum tuberosum
Manually annotated by BRENDA team
Mikkelsen, R.; Suszkiewicz, K.; Blennow, A.
A novel type carbohydrate-binding module identified in alpha-glucan, water dikinases is specific for regulated plastidial starch metabolism
Biochemistry
45
4674-4682
2006
Solanum tuberosum (Q9AWA5), Solanum tuberosum
Manually annotated by BRENDA team
Fettke, J.; Eckermann, N.; Koetting, O.; Ritte, G.; Steup, M.
Novel starch-related enzymes and carbohydrates
Cell. Mol. Biol.
52
OL883-OL904
2006
Solanum tuberosum
-
Manually annotated by BRENDA team
Edner, C.; Li, J.; Albrecht, T.; Mahlow, S.; Hejazi, M.; Hussain, H.; Kaplan, F.; Guy, C.; Smith, S.M.; Steup, M.; Ritte, G.
Glucan, water dikinase activity stimulates breakdown of starch granules by plastidial beta-amylases
Plant Physiol.
145
17-28
2007
Arabidopsis thaliana, Solanum tuberosum
Manually annotated by BRENDA team
Kozlov, S.S.; Blennow, A.; Krivandin, A.V.; Yuryev, V.P.
Structural and thermodynamic properties of starches extracted from GBSS and GWD suppressed potato lines
Int. J. Biol. Macromol.
40
449-460
2007
Solanum tuberosum
Manually annotated by BRENDA team
Hejazi, M.; Fettke, J.; Paris, O.; Steup, M.
The two plastidial starch-related dikinases sequentially phosphorylate glucosyl residues at the surface of both the A- and B-type allomorphs of crystallized maltodextrins but the mode of action differs
Plant Physiol.
150
962-976
2009
Solanum tuberosum
Manually annotated by BRENDA team
Orzechowski, S.; Grabowska, A.; Sitnicka, D.; Siminska, J.; Felus, M.; Dudkiewicz, M.; Fudali, S.; Sobczak, M.
Analysis of the expression, subcellular and tissue localisation of phosphoglucan, water dikinase (PWD/GWD3) in Solanum tuberosum L.: A bioinformatics approach for the comparative analysis of two alpha-glucan, water dikinases (GWDs) from Solanum tuberosum L.
Acta Physiol. Plant.
35
483-500
2013
Solanum tuberosum
-
Manually annotated by BRENDA team
Glaring, M.A.; Baumann, M.J.; Abou Hachem, M.; Nakai, H.; Nakai, N.; Santelia, D.; Sigurskjold, B.W.; Zeeman, S.C.; Blennow, A.; Svensson, B.
Starch-binding domains in the CBM45 family - low-affinity domains from glucan, water dikinase and alpha-amylase involved in plastidial starch metabolism
FEBS J.
278
1175-1185
2011
Solanum tuberosum (Q9AWA5)
Manually annotated by BRENDA team
Hejazi, M.; Steup, M.; Fettke, J.
The plastidial glucan, water dikinase (GWD) catalyses multiple phosphotransfer reactions
FEBS J.
279
1953-1966
2012
Arabidopsis thaliana, Solanum tuberosum
Manually annotated by BRENDA team
Mahlow, S.; Orzechowski, S.; Fettke, J.
Starch phosphorylation: insights and perspectives
Cell. Mol. Life Sci.
73
2753-2764
2016
Solanum tuberosum (Q9AWA5), Arabidopsis thaliana (Q9SAC6), Arabidopsis thaliana (Q9STV0)
Manually annotated by BRENDA team
Carpenter, M.A.; Joyce, N.I.; Genet, R.A.; Cooper, R.D.; Murray, S.R.; Noble, A.D.; Butler, R.C.; Timmerman-Vaughan, G.M.
Starch phosphorylation in potato tubers is influenced by allelic variation in the genes encoding glucan water dikinase, starch branching enzymes I and II, and starch synthase III
Front. Plant Sci.
6
143
2015
Solanum tuberosum (Q9AWA5), Solanum tuberosum
Manually annotated by BRENDA team
Bansal, A.; Das, N.
Molecular cloning and sequence comparison of a cDNA encoding alpha-glucan, water dikinase (GWD) from potato (Solanum tuberosum L.), and analysis of gene expression
J. Plant Biochem. Biotechnol.
22
441-452
2013
Solanum tuberosum (B2M0R3)
-
Manually annotated by BRENDA team
Malinova, I.; Mahto, H.; Brandt, F.; Al-Rawi, S.; Qasim, H.; Brust, H.; Hejazi, M.; Fettke, J.
EARLY STARVATION1 specifically affects the phosphorylation action of starch-related dikinases
Plant J.
95
126-137
2018
Solanum tuberosum (Q9AWA5)
Manually annotated by BRENDA team
Adegbaju, M.S.; Morenikeji, O.B.; Borrego, E.J.; Hudson, A.O.; Thomas, B.N.
Differential evolution of alpha-glucan water dikinase (GWD) in plants
Plants (Basel)
9
1101
2020
Amaranthus hypochondriacus, Brassica rapa, Carica papaya, Coffea arabica, Fragaria vesca, Gossypium hirsutum, Hordeum vulgare, Linum usitatissimum, Malus domestica, Physcomitrium patens, Porphyra umbilicalis, Sphagnum magellanicum, Triticum aestivum, Vigna unguiculata, Citrus clementina, Selaginella moellendorffii, Capsella rubella, Brachypodium distachyon, Chromochloris zofingiensis, Dioscorea alata, Amborella trichopoda, Malcolmia maritima, Myagrum perfoliatum, Musa acuminata subsp. malaccensis, Theobroma cacao (A0A061FDU7), Auxenochlorella protothecoides (A0A087SJ57), Solanum chacoense (A0A0V0IZQ3), Ananas comosus (A0A199UE45), Zea mays (A0A1D6LTL9), Cucumis melo (A0A1S3BEF3), Nicotiana tabacum (A0A1S3YFK2), Helianthus annuus (A0A251T3N7), Capsicum annuum (A0A2G2YEX8), Chlamydomonas reinhardtii (A0A2K3DIY0), Marchantia polymorpha (A0A2R6X3K3), Panicum miliaceum (A0A3L6S324), Panicum miliaceum, Solanum lycopersicum (B5B3R3), Sorghum bicolor (C5Z316), Vitis vinifera (D7TDL2), Glycine max (I1KXC2), Solanum tuberosum (Q9AWA5), Arabidopsis thaliana (Q9STV0), Chondrus crispus (R7QKK2), Phaseolus vulgaris (V7C6L3), Manihot esculenta (V9K6M5), Oryza sativa Japonica Group (XM_015787980.2), Ricinus communis (XP_015579774.1)
Manually annotated by BRENDA team
Chen, Y.; Sun, X.; Zhou, X.; Hebelstrup, K.H.; Blennow, A.; Bao, J.
Highly phosphorylated functionalized rice starch produced by transgenic rice expressing the potato GWD1 gene
Sci. Rep.
7
3339
2017
Solanum tuberosum (Q9AWA5)
Manually annotated by BRENDA team