Purification, biochemical, and molecular characterization of a novel extracellular thermostable and alkaline α-amylase from Tepidimonas fonticaldi strain HB23.

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  • Additional Information
    • Source:
      Publisher: Elsevier Country of Publication: Netherlands NLM ID: 7909578 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1879-0003 (Electronic) Linking ISSN: 01418130 NLM ISO Abbreviation: Int J Biol Macromol Subsets: MEDLINE
    • Publication Information:
      Publication: Amsterdam : Elsevier
      Original Publication: Guildford, Eng., IPC Science and Technology Press.
    • Subject Terms:
      Temperature*; Burkholderiales/*enzymology ; Extracellular Space/*enzymology ; alpha-Amylases/*chemistry ; alpha-Amylases/*metabolism; Amino Acid Sequence ; Base Sequence ; Burkholderiales/genetics ; Cloning, Molecular ; Enzyme Inhibitors/pharmacology ; Enzyme Stability ; Hydrogen-Ion Concentration ; Metals/pharmacology ; Models, Molecular ; Molecular Weight ; Protein Domains ; Sequence Analysis, DNA ; alpha-Amylases/antagonists & inhibitors ; alpha-Amylases/genetics
    • Abstract:
      The present study investigated the purification, biochemical, and molecular characterization of a novel thermostable α-amylase (TfAmy48) from Tepidimonas fonticaldi strain HB23. MALDI-TOF/MS analysis indicated that the purified enzyme is a monomer with a molecular mass of 48,138.10 Da. The results from amino-acid sequence analysis revealed high homology between the 25 NH 2 -terminal residues of TfAmy48 and those of Gammaproteobacteria α-amylases. The optimum pH and temperature values for α-amylase activity were pH 8 and 80 °C, respectively. Thin-layer chromatography (TLC) analysis showed that the final hydrolyzed products of the enzyme from soluble potato starch were maltopentaose, maltose, and maltotriose, which indicate that TfAmy48 possessed an endo-acting pattern. Compared to Termamyl®300 L, TfAmy48 showed extreme stability and tolerance towards organic solvents and excellent compatibility with some commercial laundry detergents. These proprieties make TfAmy48 enzyme a potential candidate as a cleaning bioadditive in detergent composition. The Tfamy48 gene encoding TfAmy48 was cloned, sequenced, and heterologously-expressed in the extracellular fraction of Escherichia coli strain BL21(DE3)pLysS. The biochemical properties of the extracellular purified recombinant enzyme (rTfAmy48) were similar to those of native one. The highest sequence identity value (97%) was obtained with PsAmy1 α-amylase from Pseudomonas sp. strain KFCC10818, with only 16 amino-acid (aa) residues of difference.
      (Copyright © 2019 Elsevier B.V. All rights reserved.)
    • Contributed Indexing:
      Keywords: Detergent formulations; Heterologous-expression; Hydrolytic pattern; Purification; Tepidimonas fonticaldi; α-Amylase
    • Accession Number:
      0 (Enzyme Inhibitors)
      0 (Metals)
      EC 3.2.1.1 (alpha-Amylases)
    • Publication Date:
      Date Created: 20190401 Date Completed: 20191105 Latest Revision: 20191105
    • Publication Date:
      20231215
    • Accession Number:
      10.1016/j.ijbiomac.2019.03.201
    • Accession Number:
      30928371