A possible model of benzimidazole binding to b-tubulin disclosed by invoking an inter-domain movement (Record no. 47970)

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control field 20250625153929.0
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Transcribing agency CICY
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Classification number (OCLC) (R) ; Classification number, CALL (RLIN) (NR) B-13772
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245 10 - TITLE STATEMENT
Title A possible model of benzimidazole binding to b-tubulin disclosed by invoking an inter-domain movement
490 0# - SERIES STATEMENT
Volume/sequential designation Journal of Molecular Graphics and Modelling, 23(3), p.275-284, 2004
520 3# - SUMMARY, ETC.
Summary, etc. Although it is well established that benzimidazole (BZMs)compounds exert their therapeutic effects through binding to helminth btubulin and thus disrupting microtubule-based processes in the parasites, the precise location of the benzimidazole-binding site on the btubulin molecule has yet to be determined. In the present study, we have used previous experimental data as cues to help identify this site. Firstly, benzimidazole resistance has been correlated with a phenylalanine-to-tyrosine substitution at position 200 of Haemonchus contortus b-tubulin isotype-I. Secondly, site-directed mutagenesis studies, using fungi, have shown that other residues in this region of the protein can influence the interaction of benzimidazoles with b-tubulin. However, the atomic structure of the ab-tubulin dimer shows that residue 200 and the other implicated residues are buried within the protein. This poses the question: how might benzimidazoles interact with these apparently inaccessible residues? In the present study, we present a mechanism by which those residues generally believed to interact with benzimidazoles may become accessible to the drugs. Furthermore, by docking albendazole-sulphoxide into a modelled H. contortus btubulin molecule we offer a structural explanation for how the mutation conferring benzimidazole resistance in nematodes may act, as well as a possible explanation for the species-specificity of benzimidazole anthelmintics.
650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element BENZIMIDAZOLE
650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element TUBULIN
650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element BENZIMIDAZOLE RESISTANCE
650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element DOMAIN MOVEMENT
650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element HAEMONCHUS CONTORTUS
650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element FASCIOLA HEPATICA
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Robinson, M.W.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Mcferran, N.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Trudgett, A.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Hoey, L.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Fairweather, I.
856 40 - ELECTRONIC LOCATION AND ACCESS
Uniform Resource Identifier <a href="https://drive.google.com/file/d/1budK0m1C3Z4wkbC-DM4NmCxjhaXFBcn2/view?usp=drivesdk">https://drive.google.com/file/d/1budK0m1C3Z4wkbC-DM4NmCxjhaXFBcn2/view?usp=drivesdk</a>
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Source of classification or shelving scheme Clasificación local
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  Clasificación local     Ref1 CICY CICY Documento préstamo interbibliotecario 25.06.2025   B-13772 25.06.2025 25.06.2025 Documentos solicitados