[Bacterial expression of water-soluble domain of Lynx1, endogenic neuromodulator of human nicotinic acetylcholine receptors].

Lynx1 expresses in the central nervous system and plays important role in a regulation of nicotinic acetylcholine receptors. Successful milligram-quantitive expression of ws-Lynx1 was achieved only in the case of its production in the form of cytoplasm inclusion bodies. Different conditions of ws-Lynx1 refolding for yield optimization were performed.

[The development and optimization of coupled cell-free expression system for production of the transmembrane domain of the receptor tyrosine kinase ErbB3].

The cell-free expression system based on bacterial extract S30 from E. coli for production of the transmembrane domain of human receptor tyrosine kinase ErbB3 (residues 632-675) was developed. The synthesis of the domain in the soluble form in the presence of detergents and in the form of the translation mixture precipitate was studied.

[The in vitro production of three-finger neurotoxins from snake venoms with a high abundance of disulfide bonds. Problems and their solutions].

alpha-Neurotoxins from snake venom are highly efficient inhibitors of nicotinic acetylcholine receptors (nAChR). These small proteins that have a beta-structural organization attract much interest as a tool for studies of nACh R and as prototypes for the development of new Pharmaceuticals for the treatment of diseases of the nervous system. However, the in vitro production of "three-finger" neurotoxins is complicated by the presence of four or five disulfide bonds that are closely located in their molecules.

[Expression of neurotoxin II from Naja oxiana cobra venom in Escherichia coli in a hybrid form with thioredoxin].

Neurotoxin II from the venom of cobra Naja oxiana is a short type alpha-neurotoxin, which competitively inhibits nicotinic acetylcholine receptor. The toxin gene was expressed as a construct fused with the thioredoxin gene and the linker encoding the enteropeptidase recognition site and a Met residue between the genes. The fusion protein was mainly cleaved by cyanogen bromide, since enteropeptidase was less effective.