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Shatursky OY, Manoilov KY, Gorbatiuk OB, Usenko MO, Zhukova DA, Vovk AI, Kobzar OL, Trikash IO, Borisova TA, Kolibo DV, Komisarenko SV. The geometry of diphtheria toxoid CRM197 channel assessed by thiazolium salts and nonelectrolytes. Biophys J 2021; 120:2577-2591. [PMID: 33940022 DOI: 10.1016/j.bpj.2021.04.028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Revised: 03/01/2021] [Accepted: 04/27/2021] [Indexed: 11/18/2022] Open
Abstract
The geometry of the channel formed by nontoxic derivative of diphtheria toxin CRM197 in lipid bilayer was determined using the dependence of single-channel conductance upon the hydrodynamic radii of different nonelectrolytes. It was found that the cis entrance of CRM197 channel on the side of membrane to which the toxoid was added at pH 4.8 and the trans entrance on the opposite side at pH 6.0 had effective radii of 3.90 and 3.48 Å, respectively. The 3-alkyloxycarbonylmethyl-5-(2-hydroxyethyl)-4-methyl-1,3-thiazolium salts reversibly reduced current via CRM197 channels. The potency of the blockers increased with increasing length of alkyl chain at symmetric pH 6.0 and remained high and stable at pH 4.8 on the cis side. Comparative analysis of CRM197 and amphotericin B pore size with the inhibitory action of thiazolium salts revealed a significant increase in CRM197 pore dimension at pH 6.0. Addition of thiazolium salt with nine carbons alkyl tail increased by ∼30% the viability of human carcinoma cells A431 treated with diphtheria toxin.
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Affiliation(s)
- Oleg Ya Shatursky
- Department of Neurochemistry, Palladin Institute of Biochemistry, NAS of Ukraine, Leontovich Str. 9, Kyiv 01054, Ukraine.
| | - Kyrylo Yu Manoilov
- Department of Molecular Immunology, Palladin Institute of Biochemistry, NAS of Ukraine, Leontovich Str. 9, Kyiv 01054, Ukraine
| | - Oksana B Gorbatiuk
- Department of Cell Regulatory Mechanisms, Institute of Molecular Biology and Genetics NAS of Ukraine, Zabolotnogo Str. 150, Kyiv 03143, Ukraine; State Institute of Genetic and Regenerative Medicine, NAMS of Ukraine, Andriivsky ds. 28 A, Kyiv, Ukraine
| | - Mariya O Usenko
- Department of Cell Regulatory Mechanisms, Institute of Molecular Biology and Genetics NAS of Ukraine, Zabolotnogo Str. 150, Kyiv 03143, Ukraine; State Institute of Genetic and Regenerative Medicine, NAMS of Ukraine, Andriivsky ds. 28 A, Kyiv, Ukraine
| | - Dariia A Zhukova
- Department of Molecular Immunology, Palladin Institute of Biochemistry, NAS of Ukraine, Leontovich Str. 9, Kyiv 01054, Ukraine
| | - Andriy I Vovk
- Department of Bioorganic Mechanisms, V.P. Kukhar Institute of Bioorganic Chemistry and Petrochemistry, NAS of Ukraine, Murmanska Str. 1, Kyiv 02094, Ukraine
| | - Oleksandr L Kobzar
- Department of Bioorganic Mechanisms, V.P. Kukhar Institute of Bioorganic Chemistry and Petrochemistry, NAS of Ukraine, Murmanska Str. 1, Kyiv 02094, Ukraine
| | - Irene O Trikash
- Department of Neurochemistry, Palladin Institute of Biochemistry, NAS of Ukraine, Leontovich Str. 9, Kyiv 01054, Ukraine
| | - Tatiana A Borisova
- Department of Neurochemistry, Palladin Institute of Biochemistry, NAS of Ukraine, Leontovich Str. 9, Kyiv 01054, Ukraine
| | - Denys V Kolibo
- Department of Molecular Immunology, Palladin Institute of Biochemistry, NAS of Ukraine, Leontovich Str. 9, Kyiv 01054, Ukraine
| | - Serhiy V Komisarenko
- Department of Molecular Immunology, Palladin Institute of Biochemistry, NAS of Ukraine, Leontovich Str. 9, Kyiv 01054, Ukraine
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Manoilov KY, Labyntsev AJ, Korotkevych NV, Maksymovych IS, Kolybo DV, Komisarenko SV. Particular Features of Diphtheria Toxin Internalization by Resistant and Sensitive Mammalian Cells. CYTOL GENET+ 2018. [DOI: 10.3103/s0095452718050080] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Necessity of translocation domain for realisation of cytostatic effect of non-toxic derivatives of diphtheria toxin. BIOTECHNOLOGIA ACTA 2018. [DOI: 10.15407/biotech11.02.064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Labyntsev AJ, Korotkevych NV, Kolybo DV, Komisarenko SV. EFFECT OF DIPHTHERIA TOXIN T-DOMAIN ON ENDOSOMAL pH. UKRAINIAN BIOCHEMICAL JOURNAL 2015; 87:13-23. [PMID: 26547959 DOI: 10.15407/ubj87.04.013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
A key step in the mode of cytotoxic action of diphtheria toxin (DT) is the transfer of its catalytic domain (Cd) from endosomes into the cytosol. The main activity in this process is performed by the transport domain (Td), but the molecular mechanism of its action remains unknown. We have previously shown that Td can have some influence on the endosomal transport of DT The aim of this work was to study the effect of diphtheria toxin on the toxin compartmentalization in the intracellular transporting pathway and endosomal pH. We used recombinant fragments of DT which differed only by the presence of Td in their structure, fused with fluorescent proteins. It was shown that the toxin fragment with Td moved slower by the pathway early-late endosomes-lysosomes, and had a slightly different pattern of colocalization with endosomal markers than DT fragment without Td. In addition, endosomes containing DT fragments with Td had a constant pH of about 6.5 from the 10th to 50th minute of observation, for the same time endosomes containing DT fragments without Td demonstrated a decrease in pH from 6.3 to 5.5. These results indicate that Td inhibits acidification of endosomal medium. One of possible explanations for this may be the effect of the ion channel formed by the T-domain on the process of the endosomal acidification. This property of Td may not only inhibit maturation of endosomes but also inhibit activation of endosomal pH-dependent proteases, and this promotes successful transport of Cd into the cell cytosol.
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