INVESTIGADORES
FERNANDEZ Marisa Mariel
artículos
Título:
Production of recombinant proteins by sol-gel immobilized Escherichia coli
Autor/es:
DESIMONE M.F; DE MARZ MC; COPELLO GJ; FERNÁNDEZ MARISA MARIEL; PIECKENSTAIN FL; MALCHIODI EL; DÍAZ LE
Revista:
ENZYME AND MICROBIAL TECHNOLOGY
Editorial:
ELSEVIER SCIENCE INC
Referencias:
Año: 2006 p. 1 - 18
ISSN:
0141-0229
Resumen:
The aim of this work was to study the functionality and quantitative level of
recombinant protein produced from bacteria immobilized and preserved in solgel
matrices. Matrices prepared from two precursors, silicon dioxide and
tetraethoxysilane, were studied. In previous works we analyzed the number of
viable cells and level of recombinant protein production from cultures started
with immobilized E. coli, stored in sealed tubes at 4 ºC and 20 ºC. We observed
that the amount of bacteria in silicon dioxide-derived matrix conserved in the
same order of magnitude as before immobilization, during 2 months, but those
in an alkoxide-derived matrix decrease until no viable cells were detected at
E. coli, stored in sealed tubes at 4 ºC and 20 ºC. We observed
that the amount of bacteria in silicon dioxide-derived matrix conserved in the
same order of magnitude as before immobilization, during 2 months, but those
in an alkoxide-derived matrix decrease until no viable cells were detected at
2
both 4 ºC and 20 ºC after 42 days. In this work, immobilized bacteria were used
as culture starter to produce recombinant proteins with a yield comparable with
glycerol stocks. T-cell proliferation and gel filtration assays suggest that SAgs
produced from cultures started with sol-gel immobilized bacteria retain their
biological activity. Affinity assays using a resonant biosensor showed that SSA
has affinity for human Vβ5.2 produced from sol-gel immobilized bacteria with
KD= 7.5 µM. These results contribute to the development of methods for
microbial cells preservation under field conditions.
β5.2 produced from sol-gel immobilized bacteria with
KD= 7.5 µM. These results contribute to the development of methods for
microbial cells preservation under field conditions.
D= 7.5 µM. These results contribute to the development of methods for
microbial cells preservation under field conditions.