Saccharification of Hazelnut and Rhododendron Biomasses Using β-xylanase from Thermotoga naphthophila

Yıl 2021, Cilt: 11 Sayı: 2, 1321 - 1328, 01.06.2021

Özgenur Dinçer Hasan Ufuk Celebioglu Attia Hamıd Muhammad Nauman Aftab Ahmet Karadağ

https://doi.org/10.21597/jist.827308

Öz

Enzymes can be used in various biotechnological applications due to the easy and cheap production. Since xylanase enzymes are preferred in various industries, researchon this enzyme is extensively being carried out. In this study, the β-xylanase gene was cloned from Thermotoga naphthophila, a thermophilic organism. The expression vector pET21a(+) was expressed in Escherichia coli BL21 (DE3). As a result of the studies, the pH, temperature and IPTG concentration of the enzyme were optimized to obtain highest expression. Dinitrosalicylic acid (DNS) was used to determine sugar content of the enzyme. The molecular mass of the
purified β-xylanase enzyme was determined using sodium dodecyl sulfate (SDS) polyacrylamide gel
electrophoresis. The molecular mass of the enzyme was calculated to be 38 kDa. Enzymatic hydrolysis of
hazelnut shell, rhododendron branch and rhododendron leaves was performed. Released reducing sugar contents from the enzymatic hydrolysis were calculated as 0.8461 mg mL-1, 0.6976 mg mL-1 and 0.3605 mg mL-1 for hazelnut shell, rhododendron branch, and rhododendron leaf respectively. In conclusion, β-xylanase enzyme can be an effective source for enzymatic hydrolysis to produce fermentable sugars from such biomasses.

Anahtar Kelimeler

Xylanase, cloning, expression, saccharification, bioethanol

Teşekkür

This project was supported by PAK-Turk Collaborative Research Program of Turkish Council of Higher Education (YÖK).

Kaynakça

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