03006nas a2200301   4500008004100000245016400041210006900205260000900274300000800283490000700291520195400298653001502252653001202267653001402279653002902293653001402322653002302336100002702359700002302386700003102409700002802440700003002468700001802498700001902516700001802535700002602553856012502579       2020                        eng d00aPenicillium janthinellum NCIM1366 shows improved biomass hydrolysis and a larger number of CAZymes with higher induction levels over Trichoderma reesei RUT-C300 aPenicillium janthinellum NCIM1366 shows improved biomass hydroly  cDEC   a1960 v133 a<p>Background Major cost of bioethanol is attributed to enzymes employed in biomass hydrolysis. Biomass hydrolyzing enzymes are predominantly produced from the hyper-cellulolytic mutant filamentous fungus Trichoderma reesei RUT-C30. Several decades of research have failed to provide an industrial grade organism other than T. reesei, capable of producing higher titers of an effective synergistic biomass hydrolyzing enzyme cocktail. Penicillium janthinellum NCIM1366 was reported as a cellulase hyper producer and a potential alternative to T. reesei, but a comparison of their hydrolytic performance was seldom attempted. Results Hydrolysis of acid or alkali-pretreated rice straw using cellulase enzyme preparations from P. janthinellum and T. reesei indicated 37 and 43% higher glucose release, respectively, with P. janthinellum enzymes. A comparison of these fungi with respect to their secreted enzymes indicated that the crude enzyme preparation from P. janthinellum showed 28% higher overall cellulase activity. It also had an exceptional tenfold higher beta-glucosidase activity compared to that of T. reesei, leading to a lower cellobiose accumulation and thus alleviating the feedback inhibition. P. janthinellum secreted more number of proteins to the extracellular medium whose total concentration was 1.8-fold higher than T. reesei. Secretome analyses of the two fungi revealed higher number of CAZymes and a higher relative abundance of cellulases upon cellulose induction in the fungus. Conclusions The results revealed the ability of P. janthinellum for efficient biomass degradation through hyper cellulase production, and it outperformed the established industrial cellulase producer T. reesei in the hydrolysis experiments. A higher level of induction, larger number of secreted CAZymes and a high relative proportion of BGL to cellulases indicate the possible reasons for its performance advantage in biomass hydrolysis.</p>
10aBioethanol10aCAZymes10aCellulase10aPenicillium janthinellum10aSecretome10aTrichoderma reesei1 aSreeja-Raju, Athiraraj1 aChristopher, Meera1 aKooloth-Valappil, Prajeesh1 aKuni-Parambil, Rajasree1 aGokhale, Digambar, Vittal1 aSankar, Meena1 aAbraham, Amith1 aPandey, Ashok1 aSukumaran, Rajeev, K.  uhttps://library.ncl.res.in/content/penicillium-janthinellum-ncim1366-shows-improved-biomass-hydrolysis-and-larger-number