@article{
author = "Abughren, Mohamed and Popović, Milica M. and Dimitrijevic, Rajna and Burazer, Lidija M. and Grozdanović, Milica and Atanasković-Marković, Marina and Gavrović-Jankulović, Marija",
year = "2012",
abstract = "For the heterologous production of a banana glucanase in Escherichia coli, its gene (GenBank GQ268963) was cloned into a pGEX-4T expression vector as a fusion protein with glutathione-S-transferase (GST). BL21 cells transformed with the GST-Mus a 5 construct were employed for production of the protein induced by 1 mM isopropyl-beta-D-thiogalactopyranoside (IPTG). The conditions for protein expression were optimized by varying the temperature (25, 30 and 37 C) and duration of protein expression (3, 6 and 12 h). The level of protein production was analyzed by densitometry of the sodium dodecyl sulfate-polyacrylamide gel (SDS-PAG) after electrophoretic resolution of the respective cell lysates. The optimal protein expression for downstream processing was obtained after 12 h of cell growth at 25 degrees C upon addition of IPTG. Recombinant GST-Mus a 5 purified by glutathione affinity chromatography revealed a molecular mass of about 60 kDa. The IgE and IgG reactivity of the rGST-Mus a 5 was confirmed by dot blot analysis with sera of individual patients from subjects with banana allergy and polyclonal rabbit antibodies against banana extract, respectively. The purified recombinant glucanase is a potential candidate for banana allergy diagnosis., Za potrebe proizvodnje u Escherichia coli gen glukanaze iz banane (GenBank GQ268963) je ukloniran u ekspresioni vektor pGEX-4T sa glutation-S-transferazom (GST). Proizvodnja ovog proteina u ćelijama je indukovana 1 mM izopropil-β-D-tiogalaktopiranozidom (IPTG). Uslovi za ekspresiju proteina su optimizovani variranjem temperature (25, 30 i 37°C) i dužine trajanja proteinske sinteze (3, 6 i 12 h). Nivo proizvodnje proteina je analiziran denzitometrijom SDS-PA gela nakon elektroforetskog razdvajanja ćelijskih lizata. Optimalna proizvodnja proteina za njegovo dalje procesovanje je dobijena gajenjem ćelija nakon dodatka IPTG na 25°C tokom 12 h. Rekombinantni GST-Mus a 5 prečišćen afinitetnom hromatografijom sa glutationom pokazuje molekulsku masu od 60 kDa. IgE i IgG reaktivnost izolovane glukanaze potvrđena je u 'dot blot' sa pojedinačnim serumima osoba alergičnih na bananu, i sa poliklonskim zečijim antitelima na ekstrakt banane, redom. Prečišćena rekombinantna glukanaza je potencijalan kandidat za dijagnozu alergije na bananu.",
publisher = "Serbian Chemical Soc, Belgrade",
journal = "Journal of the Serbian Chemical Society",
title = "Optimization of the heterologous expression of banana glucanase in Escherichia coli, Optimizacija heterologe proizvodnje glukanaze iz banane u E. coli",
volume = "77",
number = "1",
pages = "43-52",
doi = "10.2298/JSC110309158A"
}
