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Preliminary communication

https://doi.org/10.17113/ftb.56.01.18.5445

Korelacija između primarne strukture proteina i razine ekspresije topljivog proteina HSA dAb u bakteriji Escherichia coli

Yankun Yang ; The Key Laboratory of Carbohydrate Chemistry and Biotechnology, School of Biotechnology, Jiangnan University, Ministry of Education
Guoqiang Liu ; The Key Laboratory of Carbohydrate Chemistry and Biotechnology, School of Biotechnology, Jiangnan University, Ministry of Education
Meng Liu ; National Engineering Laboratory for Cereal Fermentation Technology, Jiangnan University
Zhonghu Bai ; National Engineering Laboratory for Cereal Fermentation Technology, Jiangnan University
Xiuxia Liu ; National Engineering Laboratory for Cereal Fermentation Technology, Jiangnan University
Xiaofeng Dai ; Jiangsu Provincial Research Center for Bioactive Product Processing Technology, Jiangnan University
Wenwen Guo ; The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University


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Abstract

Izoelektrična točka, duljina molekule, molekularna masa i slijed aminokiselina bitno utječu na topljivost proteina. U ovom smo se radu fokusirali na sastav aminokiselina i ispitali one koje najviše utječu na razinu ekspresije topljivog protutijela albumina iz ljudskog seruma (HSA dAb). Grupiranjem i primjenom linearnog modela analizirana je topljivost 65 varijanti proteina. Bitan utjecaj na ekspresiju topljivog protutijela dAb imale su specifične kombinacije aminokiselina, i to (S, R, N, D, Q) u supernatantu, (G, R, C, N, S) u lizatu peleta i (R, S, G) u ukupnom topljivom protutijelu dAb. Od 20 aminokiselina, arginin je imao negativan, a glicin i serin su imale pozitivan učinak na razinu ekspresije topljivog proteina. Preciznost linearnog modela predviđanja topljivosti proteina bila je 80 %. Zaključeno je da se povećanjem udjela polarnih aminokiselina, osobito glicina i serina, te smanjenjem udjela arginina bitno povećala ekspresija topljivog proteina HSA dAb.

Keywords

domena protutijela (dAb); Escherichia coli; heterologna ekspresija proteina; linearni model; primarna struktura

Hrčak ID:

197382

URI

https://hrcak.srce.hr/197382

Publication date:

30.3.2018.

Article data in other languages: english

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