Recombinant production and structure-function study of ts1 toxin from the Brazilian scorpion Tityus serrulatus

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Abstract

This work introduces an effective bacterial system for the production of β-toxin Ts1, the main component of the Brazilian scorpion Tityus serrulatus venom. Recombinant toxin and its 15N-labeled analogue are obtained by direct expression of the synthetic gene in Escherichia coli, with subsequent folding from the inclusion bodies. NMR spectroscopy data assert that the recombinant toxin is structured in aqueous solution and is composed of a significant fraction of β-structure. Moreover, the formation of a stable Ts1 disulfide-bond isomer of a disordered structure is observed during folding; recombinant Ts1 blocks Na+ current through NaV1.5 channels, without affecting the processes of activation and inactivation. Simultaneously, the effect upon NaV1.4 channels is associated with a shift of the activation curve toward the more negative membrane potentials.

About the authors

Z. O. Shenkarev

Shemyakin & Ovchinnikov Institute of Bioorganic Chemistry of the Russian Academy of Sciences; Moscow Institute of Physics and Technology

Author for correspondence.
Email: zakhar-shenkarev@yandex.ru
Russian Federation, 16/10, Miklukho-Maklaya Street, Moscow, 117997; 9, Institutskij, Dolgoprudny, Moscow region, 141701

M. A. Shulepko

Shemyakin & Ovchinnikov Institute of Bioorganic Chemistry of the Russian Academy of Sciences; Lomonosov Moscow State University

Email: zakhar-shenkarev@yandex.ru
Russian Federation, 16/10, Miklukho-Maklaya Street, Moscow, 117997; 1, Leninskie gory, Moscow, 119991

S. Peigneur

Catholic University of Leuven

Email: zakhar-shenkarev@yandex.ru
Belgium, Leuven

M. Yu. Myshkin

Shemyakin & Ovchinnikov Institute of Bioorganic Chemistry of the Russian Academy of Sciences; Moscow Institute of Physics and Technology

Email: zakhar-shenkarev@yandex.ru
Russian Federation, 16/10, Miklukho-Maklaya Street, Moscow, 117997; 9, Institutskij, Dolgoprudny, Moscow region, 141701

A. A. Berkut

Shemyakin & Ovchinnikov Institute of Bioorganic Chemistry of the Russian Academy of Sciences; Moscow Institute of Physics and Technology

Email: zakhar-shenkarev@yandex.ru
Russian Federation, 16/10, Miklukho-Maklaya Street, Moscow, 117997; 9, Institutskij, Dolgoprudny, Moscow region, 141701

A. A. Vassilevski

Shemyakin & Ovchinnikov Institute of Bioorganic Chemistry of the Russian Academy of Sciences; Moscow Institute of Physics and Technology

Email: zakhar-shenkarev@yandex.ru
Russian Federation, 16/10, Miklukho-Maklaya Street, Moscow, 117997; 9, Institutskij, Dolgoprudny, Moscow region, 141701

J. Tytgat

Catholic University of Leuven

Email: zakhar-shenkarev@yandex.ru
Belgium, Leuven

E. N. Lyukmanova

Shemyakin & Ovchinnikov Institute of Bioorganic Chemistry of the Russian Academy of Sciences; Lomonosov Moscow State University

Email: zakhar-shenkarev@yandex.ru
Russian Federation, 16/10, Miklukho-Maklaya Street, Moscow, 117997; 1, Leninskie gory, Moscow, 119991

M. P. Kirpichnikov

Shemyakin & Ovchinnikov Institute of Bioorganic Chemistry of the Russian Academy of Sciences; Lomonosov Moscow State University

Email: zakhar-shenkarev@yandex.ru

Academician of the RAS

Russian Federation, 16/10, Miklukho-Maklaya Street, Moscow, 117997; 1, Leninskie gory, Moscow, 119991

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