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Chitin convertion to N-acetyl-glucosamine using chitinases of Aeromonas sp. isolated from marine environment

Grant number: 13/18773-6
Support type:Regular Research Grants
Duration: October 01, 2014 - September 30, 2016
Field of knowledge:Biological Sciences - Microbiology - Applied Microbiology
Principal researcher:Gabriel Padilla
Grantee:Gabriel Padilla
Home Institution: Instituto de Ciências Biomédicas (ICB). Universidade de São Paulo (USP). São Paulo , SP, Brazil
Assoc. researchers:Adalberto Pessoa Junior

Abstract

Chitinolytic bacteria are widely distributed in the marine environment and are extremely important in the process of chitin degradation. The chitin metabolism is performed by enzymes called chitinases, which have different functions in nature and can be explore in biotechnology, especially in the production of derivatives of chitin. The production of N-acetyl-glucosamine has taken a potential interest in the last years due to its features and has great potential to be used as a component in cosmetics and for bioethanol production. This derivative is traditionally produced by chemical hydrolysis of chitin. However, the procedures used in these processes generate low yield and produce large amounts of chemical residues that can affect the environment. Thus, application of bacterial chitinases as an alternative to chemical hydrolysis of chitin coul be useful, since the bacteria are easier to handle, have low costs, are susceptible to genetic engineering and contribute to the self-sustainable development. Furthermore, the use of these enzymes in the production process would avoid the use of chemicals that may cause environmental damage. Due to this fact and our experience on chitinolytic bacteria since 2005, it is essential to explore the ability of the isolates studied previously for the production of N-acetyl-glucosamine. This study aims to evaluate the production of chitinases and N-acetyl-glucosamine in bioreactors by a chitinolytic bacteria selected of the Aeromonas genus isolated from marine ecosystem. The bacteria selected will be characterized as to species level by MLST (Multilocus Sequence Type) using seven housekeeping genes (gyrB, groL, gltA, metG, ppsA, recA,e rpoD), as the metabolic capacity through two biochemical identification systems and for the presence of nine genes associated to virulence (alt, act, ast, ahh1, aer, aerA, hlyA, ascV e ascFG). Assays more detailed will be used to assess the different chitinases expression levels and determine the enzymes expressed during cultivation in bioreactor. (AU)

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VEICULO: TITULO (DATA)
VEICULO: TITULO (DATA)

Scientific publications (4)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
CARDOZO, FLAVIO AUGUSTO; FACCHINATTO, WILLIAM MARCONDES; COLNAGO, LUIZ ALBERTO; CAMPANA-FILHO, SERGIO PAULO; PESSOA, ADALBERTO. Bioproduction of N-acetyl-glucosamine from colloidal alpha-chitin using an enzyme cocktail produced by Aeromonas caviae CHZ306. WORLD JOURNAL OF MICROBIOLOGY & BIOTECHNOLOGY, v. 35, n. 8 AUG 2019. Web of Science Citations: 0.
CARDOZO, FLVIO AUGUSTO; MIGUEL GONZALEZ, JUAN; FEITOSA, VALKER ARAUJO; PESSOA, ADALBERTO; GUTIERREZ RIVERA, IRMA NELLY. Bioconversion of alpha-chitin into N-acetyl-glucosamine using chitinases produced by marine-derived Aeromonas caviae isolates. WORLD JOURNAL OF MICROBIOLOGY & BIOTECHNOLOGY, v. 33, n. 11 NOV 2017. Web of Science Citations: 7.
CARDOZO, FLAVIO AUGUSTO; ALFONSO VARGA, NADIA CATALINA; ZIMPEL, CRISTINA KRAEMER; PESSOA, ADALBERTO; GUTIERREZ RIVERA, IRMA NELLY. Draft Genome Sequence of Aeromonas caviae CH129, a Marine-Derived Bacterium Isolated from the Coast of Sao Paulo State, Brazil. MICROBIOLOGY RESOURCE ANNOUNCEMENTS, v. 4, n. 6 NOV-DEC 2016. Web of Science Citations: 1.
CARDOZO, FLAVIO AUGUSTO; ZIMPEL, CRISTINA KRAEMER; SA GUIMARAES, ANA MARCIA; PESSOA, ADALBERTO; GUTIERREZ RIVERA, IRMA NELLY. Draft Genome Sequence of Marine-Derived Aeromonas caviae CHZ306, a Potential Chitinase Producer Strain. MICROBIOLOGY RESOURCE ANNOUNCEMENTS, v. 4, n. 6 NOV-DEC 2016. Web of Science Citations: 0.

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