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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Marine-derived fungus Aspergillus cf. tubingensis LAMAI 31: a new genetic resource for xylanase production

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dos Santos, Juliana A. [1] ; Vieira, Juliana M. F. [1] ; Videira, Alexandre [1] ; Meirelles, Lucas A. [1] ; Rodrigues, Andre [1] ; Taniwaki, Marta H. [2] ; Sette, Lara D. [1]
Total Authors: 7
[1] Univ Estadual Paulista Julio de Mesquita Filho UN, Dept Bioquim & Microbiol, 24A, 1515, BR-13506900 Rio Claro, SP - Brazil
[2] Inst Tecnol Alimentos ITAL, Campinas, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: AMB EXPRESS; v. 6, MAR 24 2016.
Web of Science Citations: 4

Marine-derived fungi have been reported as relevant producers of enzymes, which can have different properties in comparison with their terrestrial counterparts. The aim of the present study was to select from a collection of 493 marine-derived fungi the best producer of xylanase in order to evaluate the enzymatic production under different conditions. A total of 112 isolates produced xylanase in solid medium containing xylan as the carbon source, with 31 of them able to produce at least 10 U/mL of the enzyme. The best production (49.41 U/mL) was achieved by the strain LAMAI 31, identified as Aspergillus cf. tubingensis. After confirming the lack of pathogenicity (absence of ochratoxin A and fumonisin B-2 production) this fungus was submitted to the experimental design in order to evaluate the effect of different variables on the enzymatic production, with the aim of optimizing culture conditions. Three experimental designs (two Plackett-Burman and one factorial fractional) were applied. The best condition for the enzymatic production was defined, resulting in an increase of 12.7 times in comparison with the initial production during the screening experiments. In the validation assay, the peak of xylanase production (561.59 U/mL) was obtained after 96 h of incubation, being the best specific activity achieved after 72 h of incubation. Xylanase from A. cf. tubingensis LAMAI 31 had optimum pH and temperature at 5.0 and 55 degrees C, respectively, and was shown to be stable at a range of 40-50 degrees C, and in pH from 3.6 to 7.0. Results from the present work indicate that A. cf. tubingensis LAMAI 31 can be considered as a new genetic resource for xylanase production. (AU)

FAPESP's process: 13/08338-0 - Phylogeny and systematics of the parasite Escovopsis associated with attine ants
Grantee:Lucas Andrade Meirelles
Support type: Scholarships in Brazil - Master
FAPESP's process: 11/16765-0 - DNA barcoding and biotechnological potential of microfungi associated with leaf-cutting ants
Grantee:André Rodrigues
Support type: Research Grants - Young Investigators Grants
FAPESP's process: 13/19486-0 - Marine and Antarctic biotechnology: microbial enzymes and their applications
Grantee:Lara Durães Sette
Support type: Regular Research Grants
FAPESP's process: 10/17033-0 - Biotechnological exploitation of Antarctic-derived fungi
Grantee:Lara Durães Sette
Support type: Regular Research Grants