A novel dextrin produced by the enzymatic reaction of 6-α-glucosyltransferase. I. The effect of nonreducing ends of glucose with by α-1,6 bonds on the retrogradation inhibition of high molecular weight dextrin.
Biosci Biotechnol Biochem
; 85(7): 1737-1745, 2021 Jun 24.
Article
in En
| MEDLINE
| ID: mdl-33836083
ABSTRACT
We prepared a high-molecular-weight modified dextrin (MWS-1000) from a partial hydrolysate of waxy corn starch with a weight average molecular weight of 1 × 106 (WS-1000) using Paenibacillus alginolyticus PP710 α-glucosyltransferase. The gel permeation chromatography showed that the weight average molecular weight of MWS-1000 was almost the same as that of WS-1000. The side chain lengths of WS-1000 and MWS-1000 after isomaltodextranase digestion were also shown to be similar to each other by high-performance anion exchange chromatography with pulsed amperometric detection. Since MWS-1000 confirmed the presence of α-1,6 bonds by enzyme digestibility, methylation, and 1H-NMR analyses, it was presumed that the structure of MWS-1000 was based on the introduction of α-1,6 glucosyl residues at the nonreducing ends of the partial hydrolysate of waxy corn starch. Furthermore, the MWS-1000 solution was not retrograded even during refrigerated storage or after repeated freeze-thaw cycles.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Dextrins
/
Glucose
/
Glucosyltransferases
Language:
En
Journal:
Biosci Biotechnol Biochem
Journal subject:
BIOQUIMICA
/
BIOTECNOLOGIA
Year:
2021
Type:
Article
Affiliation country:
Japan