Quantitative expression analysis of the genes potentially i·nvolved in clavulanic acid overproduction in streptomyces clavuligerus

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Tezin Türü: Yüksek Lisans

Tezin Yürütüldüğü Kurum: Orta Doğu Teknik Üniversitesi, Fen Edebiyat Fakültesi, Biyolojik Bilimler Bölümü, Türkiye

Tezin Onay Tarihi: 2018

Öğrenci: CANER AKTAŞ

Danışman: GÜLAY ÖZCENGİZ

Özet:

Streptomyces clavuligerus is the producer of the medically important β-lactam antibiotics, including cephamycin C (CC) and the potent β-lactamase inhibitor clavulanic acid. (CA). We have already undertaken an extensive comparative proteomic analysis by using both 2-DE-MALDI-MS and GeLC-MS approaches between an industrial CA overproducer, namely DEPA and the reference strain NRRL3585. In this context, we documented several differentially expressed (over- and under-represented) proteins accounting for high CA titers in the former strain to include both common and unique ones. In this work, a total of 26 proteins were selected among the proteins that belonged to different functional categories such as secondary metabolite production, regulators of secondary metabolism, primary metabolism, stress response and several unknowns, and subjected to gene expression analysis. Thus, the aim of the present study is to reveal quantitative levels of the transcripts representing the proteins selected among over- and under-represented ones of these categories.