RRC ID 34380
著者 Qoura F, Elleuche S, Brueck T, Antranikian G.
タイトル Purification and characterization of a cold-adapted pullulanase from a psychrophilic bacterial isolate.
ジャーナル Extremophiles
Abstract There is a considerable potential of cold-active biocatalysts for versatile industrial applications. A psychrophilic bacterial strain, Shewanella arctica 40-3, has been isolated from arctic sea ice and was shown to exhibit pullulan-degrading activity. Purification of a monomeric, 150-kDa pullulanase was achieved using a five-step purification approach. The native enzyme was purified 50.0-fold to a final specific activity of 3.0 U/mg. The enzyme was active at a broad range of temperature (10-50 °C) and pH (5-9). Optimal activity was determined at 45 °C and pH 7. The presence of various metal ions is tolerated by the pullulanase, while detergents resulted in decreased activity. Complete conversion of pullulan to maltotriose as the sole product and N-terminal amino acid sequence indicated that the enzyme is a type-I pullulanase and belongs to rarely characterized pullulan-degrading enzymes from psychrophiles.
巻・号 18(6)
ページ 1095-102
公開日 2014-11-1
DOI 10.1007/s00792-014-0678-1
PMID 25069876
MeSH Adaptation, Physiological Amino Acid Sequence Arctic Regions Bacterial Proteins / chemistry* Bacterial Proteins / metabolism Cold Temperature* Glycoside Hydrolases / chemistry* Glycoside Hydrolases / metabolism Molecular Sequence Data Shewanella / enzymology*
IF 2.462
引用数 8
WOS 分野 BIOCHEMISTRY & MOLECULAR BIOLOGY MICROBIOLOGY
リソース情報
一般微生物 JCM 14208