Cloning and characterization of a novel α-amylase from a fecal microbial metagenome

J Microbiol Biotechnol. 2014 Apr;24(4):447-52. doi: 10.4014/jmb.1310.10121.

Abstract

To isolate novel and useful microbial enzymes from uncultured gastrointestinal microorganisms, a fecal microbial metagenomic library of the pygmy loris was constructed. The library was screened for amylolytic activity, and 8 of 50,000 recombinant clones showed amylolytic activity. Subcloning and sequence analysis of a positive clone led to the identification a novel gene (amyPL) coding for α-amylase. AmyPL was expressed in Escherichia coli BL21 (DE3) and the purified AmyPL was enzymatically characterized. This study is the first to report the molecular and biochemical characterization of a novel α-amylase from a gastrointestinal metagenomic library.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Cloning, Molecular
  • Cluster Analysis
  • Escherichia coli / genetics
  • Escherichia coli / metabolism
  • Feces / microbiology*
  • Gene Expression
  • Lorisidae*
  • Metagenome*
  • Molecular Sequence Data
  • Phylogeny
  • Sequence Analysis, DNA
  • alpha-Amylases / genetics
  • alpha-Amylases / isolation & purification
  • alpha-Amylases / metabolism*

Substances

  • alpha-Amylases

Associated data

  • GENBANK/KF311768