JOURNAL ARTICLE

Acidophilic tannase from marine Aspergillus awamori BTMFW032

P S Beena, M B Soorej, K K Elyas, G Bhat Sarita, M Chandrasekaran
Journal of Microbiology and Biotechnology 2010, 20 (10): 1403-14
21030825
Aspergillus awamori BTMFW032, isolated from sea water, produced tannase as extracellular enzyme under submerged culture conditions. Enzyme with a specific activity of 2761.89 IU/mg protein, a final yield of 0.51 %, and a purification fold of 6.32 was obtained after purification to homogeneity by ultrafiltration and gel filtration. SDS-PAGE analyses under non- reducing and reducing conditions yielded a single band of 230 kDa and 37.8 kDa, respectively, indicating presence of six identical monomers. pI of 4.4 and 8.02 % carbohydrate content in the enzyme were observed. Optimal temperature was 30ºC, although the enzyme was active at 5-80 ºC. Two pH optima, pH 2 and pH 8, were recorded and the enzyme was stable only at pH 2.0 for 24 h. Methylgallate recorded maximal affinity and K(m) and V(max) were recorded, respectively, as 1.9 X 10⁻³ M and 830 micronmol/min. Impact of several metal salts, solvents, surfactants, and typical enzyme inhibitors on tannase activity were determined to establish the novelty of the enzyme. Gene encoding tannase isolated from A. awamori is 1.232 kb and nucleic acid sequence analysis revealed an open reading frame consisting of 1122 bp (374 amino acids) of one stretch in -1 strand. In-silico analyses of gene sequences and comparison with reported sequences of other species of Aspergillus indicated that the acidophilic tannase from marine A. awamori is differs from that of other reported species.

Full Text Links

Find Full Text Links for this Article

Discussion

You are not logged in. Sign Up or Log In to join the discussion.

Related Papers

Remove bar
Read by QxMD icon Read
21030825
×

Save your favorite articles in one place with a free QxMD account.

×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"