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2.4.1.21: starch synthase (glycosyl-transferring)

This is an abbreviated version!
For detailed information about starch synthase (glycosyl-transferring), go to the full flat file.

Word Map on EC 2.4.1.21

Reaction

ADP-alpha-D-glucose
+
[(1->4)-alpha-D-glucosyl]n
=
ADP
 +
[(1->4)-alpha-D-glucosyl]n+1

Synonyms

adenosine diphosphate glucose-starch glucosyltransferase, adenosine diphosphoglucose-starch glucosyltransferase, ADP-glucose starch synthase, ADP-glucose synthase, ADP-glucose transglucosylase, ADP-glucose-starch glucosyltransferase, ADP-glucose:1,4-alpha-D-glucan 4-alpha-D-glucosyltransferase, ADPG starch synthetase, ADPG-starch glucosyltransferase, AtSS2, AtSSII, AtSSIII, CkGBSS, dull1, GBSS, GBSSI, glgA, glucosyltransferase, adenosine diphosphoglucose-starch, glycogen synthase, glycogen/starch synthase, granule bound starch synthase, granule-bound starch synthase, granule-bound starch synthase I, GSase, OsGBSSII, OsSSIII-1, OsSSIII-2, OsSSIV-1, OsSSIV-2, PvSSI, PvSSII-1, SBD123, SS1, SS4, SSI, SSII, SSII(a), SSIIa, SSIIc, SSIII, SSIII(a), SSIII-1, SSIII-B, SSIII-C, SSIIIa, SSIIIb, SSIV, SSS, SSSI, SSV, starch synthase, starch synthase 1, starch synthase 4, starch synthase I, starch synthase II, starch synthase IIa, starch synthase III, starch synthase III-1, starch synthase III-2, starch synthase III-B, starch synthase IIIa, starch synthase IV, starch synthase IV-1, starch synthase IV-2, starch synthetase, starch-synthase III, starch/glycogen synthase, TaSSIVb, TVAG_258220

ECTree

     2 Transferases
         2.4 Glycosyltransferases
             2.4.1 Hexosyltransferases
                2.4.1.21 starch synthase (glycosyl-transferring)

Specific Activity

Specific Activity on EC 2.4.1.21 - starch synthase (glycosyl-transferring)

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SPECIFIC ACTIVITY [µmol/min/mg]
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
0.026
-
in the presence of 0.5 mg glycogen primer and 500 mM sodium citrate
0.032
-
primed reaction, isoenzyme I
0.033
-
glycogen synthase I
0.039
-
glycogen synthase II
0.06
-
unprimed reaction in the presence of 500 mM citrate, recombinant starch synthase I
0.106
-
primed reaction, isoenzyme IV
0.118
-
primed reaction, isoenzyme III
0.28
-
unprimed reaction, isoenzyme III
0.338
-
primed reaction, isoenzyme II
1.1
-
unprimed reaction, synthase I
12.2
-
primed reaction, recombinant starch synthase I
15.87
-
-
2.3
-
primed reaction, synthase I
3
-
primed reaction
494
-
glycogen synthase I
505
-
glcogen synthase II
6.16
-
free isoform SSI, at pH 8.0 and 30°C
6.33
-
free isoform SSIII, at pH 8.0 and 30°C
9.75
-
free isoform SSIIa, at pH 8.0 and 30°C