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Random Mutagenesis Analysis of the Influenza A M2 Proton Channel Reveals Novel Resistance Mutants.

Identifieur interne : 000164 ( Main/Exploration ); précédent : 000163; suivant : 000165

Random Mutagenesis Analysis of the Influenza A M2 Proton Channel Reveals Novel Resistance Mutants.

Auteurs : Paul Santner [Danemark] ; João Miguel Da Silva Martins [Danemark] ; Caroline Kampmeyer [Danemark] ; Rasmus Hartmann-Petersen [Danemark] ; Jonas S. Laursen [Danemark] ; Amelie Stein [Danemark] ; Christian A. Olsen [Danemark] ; Isaiah T. Arkin [Israël] ; Jakob R. Winther [Danemark] ; Martin Willemoës [Danemark] ; Kresten Lindorff-Larsen [Danemark]

Source :

RBID : pubmed:30230310

Descripteurs français

English descriptors

Abstract

The influenza M2 proton channel is a major drug target, but unfortunately, the acquisition of resistance mutations greatly reduces the functional life span of a drug in influenza treatment. New M2 inhibitors that inhibit mutant M2 channels otherwise resistant to the early adamantine-based drugs have been reported, but it remains unclear whether and how easy resistance could arise to such inhibitors. We have combined a newly developed proton conduction assay with an established method for selection and screening, both Escherichia coli-based, to enable the study of M2 function and inhibition. Combining this platform with two groups of structurally different M2 inhibitors allowed us to isolate drug resistant M2 channels from a mutant library. Two groups of M2 variants emerged from this analysis. A first group appeared almost unaffected by the inhibitor, M_089 (N13I, I35L, and F47L) and M_272 (G16C and D44H), and the single-substitution variants derived from these (I35L, L43P, D44H, and L46P). Functionally, these resemble the known drug resistant M2 channels V27A, S31N, and swine flu. In addition, a second group of tested M2 variants were all still inhibited by drugs but to a lesser extent than wild type M2. Molecular dynamics simulations aided in distinguishing the two groups where drug binding to the wild type and the less resistant M2 group showed a stable positioning of the ligand in the canonical binding pose, as opposed to the drug resistant group in which the ligand rapidly dissociated from the complex during the simulations.

DOI: 10.1021/acs.biochem.8b00722
PubMed: 30230310


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Le document en format XML

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</teiHeader>
<front>
<div type="abstract" xml:lang="en">The influenza M2 proton channel is a major drug target, but unfortunately, the acquisition of resistance mutations greatly reduces the functional life span of a drug in influenza treatment. New M2 inhibitors that inhibit mutant M2 channels otherwise resistant to the early adamantine-based drugs have been reported, but it remains unclear whether and how easy resistance could arise to such inhibitors. We have combined a newly developed proton conduction assay with an established method for selection and screening, both Escherichia coli-based, to enable the study of M2 function and inhibition. Combining this platform with two groups of structurally different M2 inhibitors allowed us to isolate drug resistant M2 channels from a mutant library. Two groups of M2 variants emerged from this analysis. A first group appeared almost unaffected by the inhibitor, M_089 (N13I, I35L, and F47L) and M_272 (G16C and D44H), and the single-substitution variants derived from these (I35L, L43P, D44H, and L46P). Functionally, these resemble the known drug resistant M2 channels V27A, S31N, and swine flu. In addition, a second group of tested M2 variants were all still inhibited by drugs but to a lesser extent than wild type M2. Molecular dynamics simulations aided in distinguishing the two groups where drug binding to the wild type and the less resistant M2 group showed a stable positioning of the ligand in the canonical binding pose, as opposed to the drug resistant group in which the ligand rapidly dissociated from the complex during the simulations.</div>
</front>
</TEI>
<affiliations>
<list>
<country>
<li>Danemark</li>
<li>Israël</li>
</country>
</list>
<tree>
<country name="Danemark">
<noRegion>
<name sortKey="Santner, Paul" sort="Santner, Paul" uniqKey="Santner P" first="Paul" last="Santner">Paul Santner</name>
</noRegion>
<name sortKey="Hartmann Petersen, Rasmus" sort="Hartmann Petersen, Rasmus" uniqKey="Hartmann Petersen R" first="Rasmus" last="Hartmann-Petersen">Rasmus Hartmann-Petersen</name>
<name sortKey="Kampmeyer, Caroline" sort="Kampmeyer, Caroline" uniqKey="Kampmeyer C" first="Caroline" last="Kampmeyer">Caroline Kampmeyer</name>
<name sortKey="Laursen, Jonas S" sort="Laursen, Jonas S" uniqKey="Laursen J" first="Jonas S" last="Laursen">Jonas S. Laursen</name>
<name sortKey="Lindorff Larsen, Kresten" sort="Lindorff Larsen, Kresten" uniqKey="Lindorff Larsen K" first="Kresten" last="Lindorff-Larsen">Kresten Lindorff-Larsen</name>
<name sortKey="Martins, Joao Miguel Da Silva" sort="Martins, Joao Miguel Da Silva" uniqKey="Martins J" first="João Miguel Da Silva" last="Martins">João Miguel Da Silva Martins</name>
<name sortKey="Olsen, Christian A" sort="Olsen, Christian A" uniqKey="Olsen C" first="Christian A" last="Olsen">Christian A. Olsen</name>
<name sortKey="Stein, Amelie" sort="Stein, Amelie" uniqKey="Stein A" first="Amelie" last="Stein">Amelie Stein</name>
<name sortKey="Willemoes, Martin" sort="Willemoes, Martin" uniqKey="Willemoes M" first="Martin" last="Willemoës">Martin Willemoës</name>
<name sortKey="Winther, Jakob R" sort="Winther, Jakob R" uniqKey="Winther J" first="Jakob R" last="Winther">Jakob R. Winther</name>
</country>
<country name="Israël">
<noRegion>
<name sortKey="Arkin, Isaiah T" sort="Arkin, Isaiah T" uniqKey="Arkin I" first="Isaiah T" last="Arkin">Isaiah T. Arkin</name>
</noRegion>
</country>
</tree>
</affiliations>
</record>

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