{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,5]],"date-time":"2026-10-05T07:35:41Z","timestamp":1791185741400,"version":"4.1.0"},"reference-count":0,"publisher":"Akademiai Kiado Zrt.","issue":"2","content-domain":{"domain":["akjournals.com"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2007,6,1]]},"abstract":"<jats:p>Ten different strains of \n <jats:italic>Thermomyces lanuginosus<\/jats:italic>\n , isolated from composting soils were found to produce phytase when grown on PSM medium. The wild type strain CM was found to produce maximum amount of phytase (4.33 units\/g DW substrate). Culturing \n <jats:italic>T. lanuginosus<\/jats:italic>\n strain CM on medium containing wheat bran and optimizing other culture conditions (carbon source, media type, nitrogen source, level of nitrogen, temperature, pH, inoculum age, inoculum level and moisture), increased the phytase yield to 13.26 units\/g substrate. This culture was further subjected to UV mutagenesis for developing phytase hyperproducing mutants. The mutant (TL-7) showed 2.29-fold increase in phytase activity as compared to the parental strain. Employing Box-Behnken factor factorial design of response surface methodology resulted in optimized phytase production (32.19 units\/g of substrate) by mutant TL-7. A simple two-step purification (40.75-folds) of phytase from mutant TL-7 was achieved by anion exchange and gel filtration chromatography. The purified phytase (\u223c54 kDa) was characterized to be optimally active at pH 5.0 and temperature 70 \u00b0C, though the enzyme showed \u223c70% activity over a wide pH and temperature range (2.0\u201310.0 and 30\u201390 \u00b0C, respectively). The phytase showed broad substrate specificity with activity against sodium phytate, ADP and riboflavin phosphate. The phytase from \n <jats:italic>T. lanuginosus<\/jats:italic>\n was thermoacidstable as it showed up to 70% residual activity after exposure to 70 \u00b0C at pH 3.0 for 120 min. The enzyme showed K\n <jats:sub>m<\/jats:sub>\n 4.55 \u03bcM and V\n <jats:sub>max<\/jats:sub>\n 0.833 \u03bcM\/min\/mg against sodium phytate as substrate.<\/jats:p>","DOI":"10.1556\/amicr.54.2007.2.3","type":"journal-article","created":{"date-parts":[[2007,7,2]],"date-time":"2007-07-02T13:53:30Z","timestamp":1183384410000},"page":"121-138","update-policy":"https:\/\/doi.org\/10.1556\/policypage.crossmark.crossref.1","source":"Crossref","is-referenced-by-count":38,"title":["Production, purification and characterization of thermostable phytase from thermophilic fungus Thermomyces lanuginosus TL-7"],"prefix":"10.1556","volume":"54","author":[{"given":"H.","family":"Gulati","sequence":"first","affiliation":[{"name":"1 Guru Nanak Dev University Department of Microbiology Amritsar 143005 India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"B.","family":"Chadha","sequence":"additional","affiliation":[{"name":"1 Guru Nanak Dev University Department of Microbiology Amritsar 143005 India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"H.","family":"Saini","sequence":"additional","affiliation":[{"name":"1 Guru Nanak Dev University Department of Microbiology Amritsar 143005 India"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"425","container-title":["Acta Microbiologica et Immunologica Hungarica"],"original-title":[],"link":[{"URL":"https:\/\/akjournals.com\/view\/journals\/030\/54\/2\/article-p121.xml","content-type":"text\/html","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/akjournals.com\/downloadpdf\/journals\/030\/54\/2\/article-p121.xml","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2021,3,1]],"date-time":"2021-03-01T11:41:54Z","timestamp":1614598914000},"score":1,"resource":{"primary":{"URL":"https:\/\/akjournals.com\/view\/journals\/030\/54\/2\/article-p121.xml"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2007,6,1]]},"references-count":0,"journal-issue":{"issue":"2"},"URL":"https:\/\/doi.org\/10.1556\/amicr.54.2007.2.3","relation":{},"ISSN":["1217-8950","1588-2640"],"issn-type":[{"value":"1217-8950","type":"print"},{"value":"1588-2640","type":"electronic"}],"subject":[],"published":{"date-parts":[[2007,6,1]]}}}