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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.)

Assembling a xylanase-lichenase chimera through all-atom molecular dynamics simulations

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Cota, Junio [1, 2] ; Oliveira, Leandro C. [2, 3] ; Damasio, Andre R. L. [2] ; Citadini, Ana P. [2] ; Hoffmam, Zaira B. [2] ; Alvarez, Thabata M. [2] ; Codima, Carla A. [2] ; Leite, Vitor B. P. [3] ; Pastore, Glaucia [4] ; de Oliveira-Neto, Mario [1] ; Murakami, Mario T. [5] ; Ruller, Roberto [2] ; Squina, Fabio M. [2]
Total Authors: 13
[1] UNESP, Inst Biociencias, Dept Fis & Biofis, Botucatu, SP - Brazil
[2] Lab Nacl Ciencia & Tecnol Bioetanol CTBE CNPEM, Campinas, SP - Brazil
[3] Univ Estadual Paulista, UNESP, IBILCE, Dept Fis, Sao Jose Do Rio Preto, SP - Brazil
[4] Univ Estadual Campinas, Fac Engn Alimentos, Campinas, SP - Brazil
[5] Lab Nacl Biociencias LNBio CNPEM, Campinas, SP - Brazil
Total Affiliations: 5
Document type: Journal article
Web of Science Citations: 15

Multifunctional enzyme engineering can improve enzyme cocktails for emerging biofuel technology. Molecular dynamics through structure-based models (SB) is an effective tool for assessing the tridimensional arrangement of chimeric enzymes as well as for inferring the functional practicability before experimental validation. This study describes the computational design of a bifunctional xylanase-lichenase chimera (XylLich) using the xynA and bglS genes from Bacillus sub fills. In silico analysis of the average solvent accessible surface area (SAS) and the root mean square fluctuation (RMSF) predicted a fully functional chimera, with minor fluctuations and variations along the polypeptide chains. Afterwards, the chimeric enzyme was built by fusing the xynA and bglS genes. XylLich was evaluated through small-angle X-ray scattering (SAXS) experiments, resulting in scattering curves with a very accurate fit to the theoretical protein model. The chimera preserved the biochemical characteristics of the parental enzymes, with the exception of a slight variation in the temperature of operation and the catalytic efficiency (k(cat)/K-m). The absence of substantial shifts in the catalytic mode of operation was also verified. Furthermore, the production of chimeric enzymes could be more profitable than producing a single enzyme separately, based on comparing the recombinant protein production yield and the hydrolytic activity achieved for XylLich with that of the parental enzymes. (C) 2013 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 11/13242-7 - Studies of enzymatic mechanisms for the improvement of bio-fuel production
Grantee:Leandro Cristante de Oliveira
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 08/58037-9 - Library generation for biomass-conversion enzymes from soil metagenome
Grantee:Fábio Márcio Squina
Support type: Program for Research on Bioenergy (BIOEN) - Young Investigators Grants
FAPESP's process: 11/02169-7 - Aspergillus nidulans as a model for heterologous expression of cellulases and hemicellulases
Grantee:André Ricardo de Lima Damasio
Support type: Scholarships in Brazil - Post-Doctorate