KEGG ENZYME: 2.4.1.242

ENZYME: 2.4.1.242

Entry

EC 2.4.1.242 Enzyme

Name

NDP-glucose---starch glucosyltransferase;
granule-bound starch synthase;
starch synthase II (ambiguous);
waxy protein;
starch granule-bound nucleoside diphosphate glucose-starch glucosyltransferase;
granule-bound starch synthase I;
GBSSI;
granule-bound starch synthase II;
GBSSII;
GBSS;
NDPglucose-starch glucosyltransferase

Class

Transferases;
Glycosyltransferases;
Hexosyltransferases

Sysname

NDP-glucose:(1->4)-alpha-D-glucan 4-alpha-D-glucosyltransferase

Reaction(IUBMB)

NDP-glucose + [(1->4)-alpha-D-glucosyl]n = NDP + [(1->4)-alpha-D-glucosyl]n+1 [RN:R07261]

Reaction(KEGG)

R07261 > R00292 R02421 R06049(G) R06051(G)

Substrate

NDP-glucose [CPD:C15541];
[(1->4)-alpha-D-glucosyl]n

Product

NDP [CPD:C00454];
[(1->4)-alpha-D-glucosyl]n+1

Comment

Unlike EC 2.4.1.11, glycogen(starch) synthase and EC 2.4.1.21, starch synthase, which use UDP-glucose and ADP-glucose, respectively, this enzyme can use either UDP- or ADP-glucose. Mutants that lack the Wx (waxy) allele cannot produce this enzyme, which plays an important role in the normal synthesis of amylose. In such mutants, only amylopectin is produced in the endosperm [3] or pollen [5].

History

EC 2.4.1.242 created 2005

Pathway

ec00500

Starch and sucrose metabolism

ec01100

Metabolic pathways

ec01110

Biosynthesis of secondary metabolites

Orthology

K13679

granule-bound starch synthase

K20812

glycogen synthase

Genes

RSS:

109440341

ATH:	AT1G32900(GBSS1)

ALY:	ARALYDRAFT_473472

CRB:

17898386

CSAT:

104741860 104757652 104779038

EUS:	EUTSA_v10007089mg

BRP:

103874772

BNA:	111211457 111212542

BOE:

106295327

THJ:

104806459

CPAP:

110816544

CIT:	102577951 102625907

CIC:	CICLE_v10019346mg CICLE_v10019349mg

TCC:

18605949

GRA:	105765362 105791291 105800190

GHI:	107890807 107911823 107929513 107930241 107947218 107948245

GAB:	108456715 108476229 108479236

DZI:	111287497 111305992 111308105

EGR:	104437306 104444119

GMX:	100037476 100170703(GBSSIa) 100787590 100817424

PVU:	PHAVU_001G0825000 PHAVU_010G119300g

VRA:	106771165 106780356

VAR:	108322804 108347686

CCAJ:

109808324 109816601

MTR:	MTR_1g078000 MTR_8g024340

CAM:	101494573 101497940 101515416

LJA:	Lj3g3v2515230.1(Lj3g3v2515230.1) Lj3g3v2515230.2(Lj3g3v2515230.2) Lj5g3v1262950.2(Lj5g3v1262950.2)

ADU:	107465914 107473063

AIP:	107617870 107624325

LANG:

109331786 109335188 109338471 109355844

FVE:	101296800 101298961

PPER:

18776048 18785206

PMUM:

103344039

PAVI:

110758897 110764046

MDM:	103410777 103411679 103437450(GBSSIa) 103439436(GBSSIb) 103454831

PXB:	103935950 103950708 103956358

ZJU:	107403798 107423777

CSV:

CMO:

MCHA:

CMAX:

CMOS:

CPEP:

RCU:	8269527 8288864

JCU:	105639084 105645600

HBR:	110642781 110670417

MESC:

110609003 110627580

POP:	7455034 7491408

JRE:	108992643 108993773

QSU:	112005619 112008531

VVI:	100243677 100264969

SLY:	101259777(GBSS1)

SPEN:

107027917

SOT:	102577459(GBSS)

CANN:

107863475(waxy)

NTA:	107759522(GBSS1) 107829009(GBSSI)

NSY:

104222724

NTO:

104114157

NAU:

109237066

INI:	109157098(waxy)

SIND:

105164411

OEU:	111377230 111387558

HAN:

LSV:

CCAV:

DCR:

BVG:	104883332 104892645

SOE:	110796039 110796565

CQI:	110722789 110727853 110732328 110738898

NNU:	104593836(Waxy) 104604810

PSOM:

113294774 113301600

OSA:	4340018 4343010

DOSA:

Os06t0133000-01(Os06g0133000) Os07t0412100-01(Os07g0412100)

OBR:	102717622 102719729

BDI:	100832486 100842237

ATS:	109732118(LOC109732118) 109774163(LOC109774163)

SBI:	8057926 8068390

ZMA:	100125638(GBSSIIa) 103630223 111589219 541854(wx1)

SITA:

101761090(WAXY) 101786779

PDA:

103695691

EGU:	105037411 105042450 105059288

MUS:	103978866(GBSSI-2) 103996709 103998560(GBSSI-4)

DCT:

110099111

AOF:

109848515

ATR:

18428468

SMO:	SELMODRAFT_149847(GBSS)

PPP:	112273956 112295463

CRE:	CHLREDRAFT_205619(GBS2) CHLREDRAFT_503(STA2)

VCN:	VOLCADRAFT_72820

MNG:

MNEG_7624

OLU:	OSTLU_49880

OTA:	OT_ostta06g02940

BPG:	Bathy05g03190

MIS:	MICPUN_104736(GBSSI)

MPP:	MICPUCDRAFT_49698(GBSSI)

CSL:	COCSUDRAFT_52411 COCSUDRAFT_54144

CVR:	CHLNCDRAFT_58262

SMIN:

v1.2.010047.t1(symbB.v1.2.010047.t1) v1.2.010048.t1(symbB.v1.2.010048.t1) v1.2.021726.t1(symbB.v1.2.021726.t1) v1.2.021727.t1(symbB.v1.2.021727.t1)

GTT:	GUITHDRAFT_164385(gbss)

CWA:	CwatDRAFT_2178

PHO:	PH0069(PH0069)

PAB:

PFU:

PFI:

PYN:

PYA:	PYCH_17340

PYS:

Py04_0144

PYC:	TQ32_06655

TKO:

TK1768

TON:

TON_1798

TGA:	TGAM_0597(glgA)

TSI:

TSIB_1780

TBA:	TERMP_01651

THE:

THA:

THM:

TLT:

THS:

TNU:

TEU:

TGY:	X802_07260

THV:	ADU37_CDS19000

TCH:	CHITON_0170

TPEP:

A0127_06365

TGG:	A3K92_06325

TCE:	A3L02_08145

TBS:	A3L01_10095

THH:	CDI07_09930

TSL:	A3L11_03385

TTD:	A3L14_00965

TPRF:

A3L09_09035

TRL:	A3L10_09470

TPAF:

A3L08_02835

THY:	A3L12_02660

PPAC:

PAP_04985

» show all

Reference

1 [PMID:4824506]

Authors

Tsai CY.

Title

The function of the waxy locus in starch synthesis in maize endosperm.

Journal

Biochem Genet 11:83-96 (1974)

Reference

2 [PMID:9765530]

Authors

Nakamura T, Vrinten P, Hayakawa K, Ikeda J.

Title

Characterization of a granule-bound starch synthase isoform found in the pericarp of wheat.

Journal

Plant Physiol 118:451-9 (1998)

Reference

3 [PMID:9951718]

Authors

Fujita N, Taira T.

Title

A 56-kDa protein is a novel granule-bound starch synthase existing in the pericarps, aleurone layers, and embryos of immature seed in diploid wheat (Triticum monococcum L.).

Journal

Planta 207:125-32 (1998)
DOI:10.1007/s004250050464

Reference

4 [PMID:10393240]

Authors

Murai J, Taira T, Ohta D.

Title

Isolation and characterization of the three Waxy genes encoding the granule-bound starch synthase in hexaploid wheat.

Journal

Gene 234:71-9 (1999)
DOI:10.1016/S0378-1119(99)00178-X

Reference

5 [PMID:17248421]