KEGG   ENZYME: 2.7.9.5Help
Entry
EC 2.7.9.5                  Enzyme                                 

Name
phosphoglucan, water dikinase;
PWD;
OK1
Class
Transferases;
Transferring phosphorus-containing groups;
Phosphotransferases with paired acceptors
BRITE hierarchy
Sysname
ATP:phospho-alpha-glucan, water phosphotransferase
Reaction(IUBMB)
ATP + [phospho-alpha-glucan] + H2O = AMP + O-phospho-[phospho-alpha-glucan] + phosphate
Substrate
ATP [CPD:C00002];
[phospho-alpha-glucan];
H2O [CPD:C00001]
Product
AMP [CPD:C00020];
O-phospho-[phospho-alpha-glucan];
phosphate [CPD:C00009]
Comment
The enzyme phosphorylates granular starch that has previously been phosphorylated by EC 2.7.9.4, alpha-glucan, water dikinase; there is no activity with unphosphorylated glucans. It transfers the beta-phosphate of ATP to the phosphoglucan, whereas the gamma-phosphate is transferred to water [1]. In contrast to EC 2.7.9.4, which phosphorylates glucose groups in glucans on O-6, this enzyme phosphorylates glucose groups in phosphorylated starch on O-3 [2]. The protein phosphorylates itself with the beta-phosphate of ATP, which is then transferred to the glucan [1].
History
EC 2.7.9.5 created 2005
Orthology
K15535  
phosphoglucan, water dikinase
Genes
ATH: 
AT5G26570(ATGWD3)
ALY: 
CRB: 
EUS: 
BRP: 
BNA: 
THJ: 
CIT: 
CIC: 
TCC: 
GRA: 
EGR: 
GMX: 
PVU: 
VRA: 
MTR: 
CAM: 
ADU: 
AIP: 
FVE: 
PPER: 
PMUM: 
MDM: 
PXB: 
CSV: 
CMO: 
RCU: 
JCU: 
POP: 
POPTR_0002s23550g(POPTRDRAFT_645328) POPTR_0014s14510g(POPTRDRAFT_664666)
VVI: 
SLY: 
SPEN: 
SOT: 
102577700(GWD3)
SIND: 
BVG: 
NNU: 
OSA: 
4352028(GWD3)
DOSA: 
Os12t0297500-01(Os12g0297500)
OBR: 
BDI: 
SBI: 
SORBI_04g010020(SORBIDRAFT_04g010020)
ZMA: 
100274067(magi29945) 103640931
SITA: 
PDA: 
EGU: 
MUS: 
ATR: 
SMO: 
PPP: 
CRE: 
VCN: 
OLU: 
OTA: 
BPG: 
MIS: 
MPP: 
CSL: 
CVR: 
APRO: 
CCP: 
TGO: 
GTT: 
 » show all
Taxonomy
Reference
1  [PMID:15618411]
  Authors
Kotting O, Pusch K, Tiessen A, Geigenberger P, Steup M, Ritte G.
  Title
Identification of a novel enzyme required for starch metabolism in Arabidopsis leaves. The phosphoglucan, water dikinase.
  Journal
Plant. Physiol. 137 (2005) 242-52.
  Sequence
[ath:AT5G26570]
Reference
2  [PMID:16914145]
  Authors
Ritte G, Heydenreich M, Mahlow S, Haebel S, Kotting O, Steup M.
  Title
Phosphorylation of C6- and C3-positions of glucosyl residues in starch is catalysed by distinct dikinases.
  Journal
FEBS. Lett. 580 (2006) 4872-6.
Other DBs
ExplorEnz - The Enzyme Database: 
IUBMB Enzyme Nomenclature: 
ExPASy - ENZYME nomenclature database: 
BRENDA, the Enzyme Database: 
CAS: 
912567-76-1

DBGET integrated database retrieval system