Limit Dextrinase

A Limit Dextrinase is an Enzyme that hydrolyzes (1->6)-alpha-D-glucosidic branch linkages in alpha-and beta-limit dextrins of amylopectin and glycogen, in amylopectin and pullulan.

• AKA: Amylopectin-1,6-Glucosidase, R-Enzyme.
• Context:
  • It can be identified as following enzyme entry: EC 3.2.1.142.
• Example(s):
  • Arabidopsis Thaliana,
  • PU1 Gene.
  • …
• Counter-Example(s):
  • Sucrase-Isomaltase,
  • Amylo-Alpha-1,6-Glucosidase,
  • Pullulanase,
  • Isoamylase,
  • Sucrose Alpha-Glucosidase.
• See: Pullulan, Enzyme, List of Enzymes, Catalysis, Hydrolysis, Dextrins, Amylopectin, Glycogen.

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References

2019a

• (Wikipedia, 2019) ⇒ https://en.wikipedia.org/wiki/Limit_dextrinase Retrieved:2019-3-28.
  • Limit dextrinase (EC 3.2.1.142, R-enzyme, amylopectin-1,6-glucosidase, dextrin alpha-1,6-glucanohydrolase) is an enzyme with systematic name dextrin 6-alpha-glucanohydrolase. This enzyme catalyses the hydrolysis of (1->6)-alpha-D-glucosidic linkages in alpha- and beta-limits dextrins of amylopectin and glycogen,in amylopectin and pullulan.

2019b

• (EC, 2019) ⇒ https://enzyme.expasy.org/EC/3.2.1.142
  • QUOTE: Hydrolysis of (1->6)-alpha-D-glucosidic linkages in alpha- and beta-limit dextrins of amylopectin and glycogen, and in amylopectin and pullulan (...)
    • Plant enzymes with little or no action on glycogen.
    • Action on amylopectin is incomplete, but action on alpha-limit dextrins is complete.
    • Maltose is the smallest sugar it can release from an alpha-(1->6)- linkage.

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