Partial purification and characterization of phytase from Aspergillus foetidus MTCC 11682
Autor: | A.V. Elangovan, B. D. Punith, Sreeja Ajith, Divya Shet, S. ShreeVidhya, Jyotirmoy Ghosh |
---|---|
Jazyk: | angličtina |
Rok vydání: | 2019 |
Předmět: |
0106 biological sciences
lcsh:Biotechnology Feed additive Size-exclusion chromatography lcsh:QR1-502 Biophysics Peptide 01 natural sciences Applied Microbiology and Biotechnology lcsh:Microbiology 03 medical and health sciences chemistry.chemical_compound lcsh:TP248.13-248.65 010608 biotechnology Ammonium 030304 developmental biology chemistry.chemical_classification 0303 health sciences Aspergillus foetidus biology biology.organism_classification Phytase Amino acid Enzyme Biochemistry chemistry Original Article Phy gene |
Zdroj: | AMB Express AMB Express, Vol 9, Iss 1, Pp 1-11 (2019) |
ISSN: | 2191-0855 |
Popis: | Phytase is a phosphatase enzyme widely used as feed additive to release inorganic phosphorus from plant phytate and enhance its uptake in monogastric animals. Although engineered fungal phytases are used most, a natural enzyme gives opportunity to understand novel properties, if any. In the current study, a novel fungal strain, Aspergillus foetidus MTCC 11682 was immobilized on poly urethane cubes and used for phytase production, purification and molecular characterization. Phytase produced by this method was partially purified by ammonium sulphate precipitation and Sephacryl S-200HR gel filtration to 23.4-fold (compared to crude extract) with recovery of 13% protein. Electrophoresis analysis revealed that phytase has molecular weight of 90.5 kDa on non-reducing and 129.6 kDa on reducing SDS-PAGE. The purified phytase exhibited a wider pH and temperature stability. Analysis of the cloned sequence showed that the gene has 1176 bp that encodes for a peptide of 391 amino acids of the core catalytic region. It was also found that phytase from A. foetidus has a sequence identity of 99% with the phytase gene of other Aspergillus species at nucleotide level and 100% at protein level in A. niger, A. awamori, A. oryzae. In silico analysis of sequence identified the presence of two consecutive and one non-consecutive intra chain disulfide bonds in the phytase. This probably contributed to the differential migration of phytase on reducing and non-reducing SDS-PAGE. There are predicted 11 O-glycosylation sites and 8 N-glycosylation sites, possibly contributed to an enhanced stability of enzyme produced by this organism. This study opened up a new horizon for exploring the novel properties of phytase for other applications. |
Databáze: | OpenAIRE |
Externí odkaz: |