Physicochemical characteristics of modification of chaperon groel apical domain designed to enhance expression and stability of target proteins [Физико-химическая характеристика варианта апикального домена шаперона GroEL для повышения уровня биосинтеза и увеличения стабильности целевых белков]

Описаны свойства нового белка, являющегося вариантом апикального домена шаперона GroEL, предназначенного служить лидером при создании слитых белков. Данный полипептидный лидер демонстрирует высокий уровень биосинтеза в бактериальной системе, растворим и сохраняет растворимость после стандартных биохимических манипуляций. Исследована его вторичная структура и ее термостабильность, а также растворимость белка в широком диапазоне температур. Для упрощения процедуры последующей очистки целевого белка предусмотрена возможность его химического отщепления по остатку метионина под действием бромциана.The expression of heterologous proteins in bacterial system is often impeded or even impossible due, for instance, to their lability, hydrophobicity or toxicity. In many cases, the problem can be partially or completely solved by creating fusion proteins with a leader able to enhance the solubility or stability of a target protein. In this work, the properties of a new protein, a modification of GroEL apical domain, designed to be a leader in fusion systems have been described. This polypeptide leader demonstrates a high level of expression in the bacterial system; it is soluble and retains its solubility after standard biochemical manipulations. The secondary structure of the protein and its thermal stability, and also the protein solubility were studied in the wide temperature range. To simplify the following purification of the target protein, a possibility of its chemical cleavage from the fused protein at the methionine residues using cyan bromide is provided. © 2009-2017 State Research Institute for Genetics and Selection of Industrial.

Authors
Kurov K.A.2 , Savvin O.I.2 , Yurkova M.S. 2, 1 , Zenin V.A. 2, 1 , Nagibina G.S.3 , Melnik B.S.3 , Fedorov A.N. 2, 1
Publisher
State Research Institute for Genetics and Selection of Industrial Microorganisms
Number of issue
6
Language
Russian
Pages
43-50
Status
Published
Volume
34
Year
2018
Organizations
  • 1 Peoples' Friendship University of Russia, Moscow, 117198, Russian Federation
  • 2 Federal Research Centre «Fundamentals of Biotechnology», Russian Academy of Sciences, Moscow, 119071, Russian Federation
  • 3 Institute of Protein Research, Russian Academy of Sciences, Puschino, Moskovskaya Oblast, 142290, Russian Federation
Keywords
Bacterial expression; Chaperon GroEL; Fusion system; Leader protein; Бактериальная экспрессия; Белок-лидер; Система слитых белков; Шаперон GroEL
Date of creation
04.02.2019
Date of change
04.02.2019
Short link
https://repository.rudn.ru/en/records/article/record/36559/
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