| Yazarlar |
Dr. Öğr. Üyesi Cem ÖZİÇ
Kafkas Üniversitesi, Türkiye |
Muhittin Arslanyolu
Anadolu Üniversitesi, Türkiye |
| Özet |
| Glutathione S-transferase (GST) is the one of most widely used affinity tags in biotechnology applications. The present study named a GST gene as the TtGSTz1 gene, characterized with the conserved glutathione binding motif (SSTSWRVRIAL) under a GST zeta subfamily from Tetrahymena thermophila. Phylogenetic analysis of the TtGstz1p protein sequence, with its orthologs from different GST classes, showed that it is a member of the unicellular GSTz monophyletic clade, which is positioned close to the bacterial GSTz clade. Seven codons of the TtGSTz1 gene were first engineered by introducing silent mutations (TAA > CAA or TAG > CAG) to the code for glutamine instead of stop signals in E. coli. The recombinant TtGSTz1 gene, with its 6XHis tag, was expressed using the pET16b expression plasmid and E. coli BL21(DE3). SDS-PAGE analysis of the 6XHis-TtGstz1p protein confi rmed its expression and purification by nickel agarose and glutathione-sepharose 4B. Additionally, both anti-His and anti-GST antibodies recognized the purifi ed 6XHis-TtGSTz in the western blot analysis. In conclusion, the results presented here suggest that the 6XHis- TtGstz1p fusion protein could be used as a dual tag in Tetrahymena expression vectors with a sequential 2-step protein purifi cation procedure. |
| Anahtar Kelimeler |
| Protozoa,Escherichia coli,Tetrahymena thermophila,glutathione S-transferase,protein extraction,recombinant proteins |
| Makale Türü | Özgün Makale |
| Makale Alt Türü | SSCI, AHCI, SCI, SCI-Exp dergilerinde yayımlanan tam makale |
| Dergi Adı | Turkish Journal of Biology |
| Dergi ISSN | 1300-011X |
| Dergi Tarandığı Indeksler | SCI-Expanded |
| Makale Dili | İngilizce |
| Basım Tarihi | 04-2012 |
| Cilt No | 36 |
| Sayı | 5 |
| Sayfalar | 513 / 526 |
| Doi Numarası | doi:10.3906/biy-1110-2 |
| Makale Linki | http://mistug.tubitak.gov.tr/bdyim/toc.php?dergi=biy&yilsayi=2012/5 |
