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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.)

Improvement in extracellular secretion of recombinant l-asparaginase II by Escherichia coli BL21 (DE3) using glycine and n-dodecane

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Author(s):
Flores-Santos, Juan Carlos [1] ; Moguel, Ignacio S. [1] ; Monteiro, Gisele [1] ; Pessoa, Adalberto [1] ; Vitolo, Michele [1]
Total Authors: 5
Affiliation:
[1] Univ Sao Paulo, Sch Pharmaceut Sci, Dept Pharmaceut & Biochem Technol, Av Prof Lineu Prestes, Bloco 16, BR-580 Sao Paulo, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: Brazilian Journal of Microbiology; v. 52, n. 3, p. 1247-1255, SEP 2021.
Web of Science Citations: 0
Abstract

l-asparaginase II (ASNase) is the biopharmaceutical of choice for the treatment of acute lymphoblastic leukaemia. In this study, E. coli BL21 (DE3) transformed with the pET15b + asnB vector which expresses recombinant ASNase was used as a source to obtain this enzyme. The ideal conditions to produce ASNase would be a high level of secretion into the extracellular medium, which depends not only on the application of molecular biology techniques but also on the development of a strategy to modify cell permeability such as the addition of substances to the culture medium that stimulate destabilisation of structural components of the cell. Thus, the growth of E. coli BL21 (DE3) in modified Luria-Bertani broth, supplemented with 0.8% (w/v) glycine and 6% (v/v) n-dodecane, increased the total yield of ASNase by about 50% (15,108 IU L-1) and resulted in a 16-fold increase in extracellular enzymatic productivity (484 IU L-1 h(-1)), compared to production using the same medium without addition of these substances. Most of the enzyme (89%) was secreted into the culture medium 24 h after the induction step. This proposed approach presents a simple strategy to increase extracellular production of ASNase in E. coli. (AU)

FAPESP's process: 13/08617-7 - Production of extracellular L-asparaginase: from bioprospecting to the engineering of an antileukemic biopharmaceutical
Grantee:Adalberto Pessoa Junior
Support Opportunities: Research Projects - Thematic Grants