Biopolym. Cell. 2017; 33(3):214-220.
http://dx.doi.org/10.7124/bc.000954
Molecular and Cell Biotechnologies
Production, purification of the recombinant analog of Y-box-binding protein and its interaction with poly(ADP-ribose), RNA, single- and double-stranded DNAs
1Alemasova E. E., 1, 2Naumenko K. N., 1Pestryakov P. E., 1, 2Lavrik O. I.
  1. Novosibirsk Institute of Chemical Biology and Fundamental Medicine, Siberian Branch of the Russian Academy of Sciences
    8, Akademika Lavrentieva Ave., Novosibirsk, Russian Federation, 630090
  2. Novosibirsk State University
    2, Pirogova Str., Novosibirsk, Russian Federation, 630090

Abstract

Aim. Production and purification of the recombinant histidine-tagged Y-box- binding protein and study of its interaction with DNA and poly(ADP-ribose). Methods. Ligation-independent cloning, PCR, Sanger sequencing, protein chromatography, polyacrylamide gel electrophoresis, and electrophoresis mobility shift assay. Results. cDNA coding for the YB-1 protein has a previously undocumented two single nucleotide polymorphisms. The expression construct for production of the his-tagged YB-1 protein was designed to simplify the purification procedure and an appropriate protocol for protein purification was developed. Using electrophoresis mobility shift assay, we have shown that poly(ADP-ribose) competes with a double- and single-stranded DNA and RNA for binding to purified recombinant his-tagged YB-1. Conclusions. In the present work we developed and optimized the procedure of the recombinant YB-1 protein production and purification from bacterial cells. We found that poly(ADP-ribose) at high concentration is able to recruit YB-1 protein from the YB-1-DNA and YB-1-RNA complexes, suggesting a possible YB-1 involvement in DNA repair.
Keywords: YB-1, protein purification, poly(ADP-ribose) (PAR), DNA repair
Full text: (PDF, in English)

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