KEGG   ENZYME: 2.7.9.4Help
Entry
EC 2.7.9.4                  Enzyme                                 

Name
alpha-glucan, water dikinase;
starch-related R1 protein, GWD
Class
Transferases;
Transferring phosphorus-containing groups;
Phosphotransferases with paired acceptors
BRITE hierarchy
Sysname
ATP:alpha-glucan, water phosphotransferase
Reaction(IUBMB)
ATP + alpha-glucan + H2O = AMP + phospho-alpha-glucan + phosphate
Substrate
ATP [CPD:C00002];
alpha-glucan [CPD:C00912];
H2O [CPD:C00001]
Product
AMP [CPD:C00020];
phospho-alpha-glucan;
phosphate [CPD:C00009]
Comment
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].
History
EC 2.7.9.4 created 2002
Orthology
K08244  
alpha-glucan, water dikinase
Genes
ATH: 
AT1G10760(SEX1) AT4G24450(PWD)
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: 
VVI: 
SLY: 
SPEN: 
SOT: 
SIND: 
BVG: 
NNU: 
OSA: 
DOSA: 
Os06t0498400-01(Os06g0498400)
OBR: 
BDI: 
SBI: 
SORBI_10g017820(SORBIDRAFT_10g017820)
ZMA: 
100381411(AY109804)
SITA: 
PDA: 
EGU: 
MUS: 
ATR: 
SMO: 
PPP: 
CRE: 
VCN: 
OLU: 
OTA: 
Ot13g01510(SR1-A)
BPG: 
MIS: 
MPP: 
CSL: 
CVR: 
APRO: 
CME: 
CCP: 
TGO: 
GTT: 
 » show all
Taxonomy
Reference
1  [PMID:12011472]
  Authors
Ritte G, Lloyd JR, Eckermann N, Rottmann A, Kossmann J, Steup M.
  Title
The starch-related R1 protein is an alpha -glucan, water dikinase.
  Journal
Proc. Natl. Acad. Sci. U. S. A. 99 (2002) 7166-71.
  Sequence
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: 
664327-94-0

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