title: A thermoactive alpha-amylase from a Bacillus sp. isolated from CSMCRI salt farm.
abstract: Amylases are the most important hydrolytic enzymes for starch-based industries. It is desirable that alpha-amylases should be active at high temperature of gelatinization (100-110 degrees C) and liquefaction (80-90 degrees C) to economize processes. Therefore, thermostable and thermoactive enzyme from natural bacterial strain would have wide industrial importance. In the present study a highly thermoactive and thermostable amylase producing Bacillus sp. was isolated from experimental salt farm of Central Salt and Marine Chemicals Research Institute, yielding 452Uml(-1) amylase in medium containing (%) NaCl 0.5, peptone 0.5, beef extract 0.3, starch 1.0 at 37 degrees C, pH 7.0 after 48h of incubation. Maximum activity of amylase was observed at pH 8.0 and 110 degrees C temperature. The crude enzyme was highly active between pH 6.0 and 11.0 and observed to be active and thermostable after 30min of incubation at 60 degrees C. These properties indicated that the isolated alpha-amylase enzyme is suitable for starch liquefaction and other food processing.
authors.affiliation: Salt Marine and Inorganic Chemicals, Central Salt and Marine Chemicals Research Institute, Council of Scientific & Industrial Research (CSIR), G.B. Marg, Bhavnagar 364021, India.
authors.forename: Imran
authors.initials: I
authors.lastname: Pancha
authors.forename: Deepti
authors.initials: D
authors.lastname: Jain
authors.forename: Anupama
authors.initials: A
authors.lastname: Shrivastav
authors.forename: Sanjiv K
authors.initials: SK
authors.lastname: Mishra
authors.forename: Bhumi
authors.initials: B
authors.lastname: Shethia
authors.forename: Sandhya
authors.initials: S
authors.lastname: Mishra
authors.forename: Mohandas
authors.initials: M
authors.lastname: V P
authors.forename: Bhavanath
authors.initials: B
authors.lastname: Jha
mesh_terms: D001407:Bacillus / Q000201:enzymology* / Q000302:isolation & purification*; D004795:Enzyme Stability; D006863:Hydrogen-Ion Concentration; D008670:Metals / Q000494:pharmacology; D012492:Salts; D013213:Starch / Q000378:metabolism; D013696:Temperature; D000516:alpha-Amylases / Q000737:chemistry / Q000378:metabolism*
chemical_list: D008670:Metals; D012492:Salts; D013213:Starch; D000516:alpha-Amylases