Dennison, Sarah R., Harris, Frederick, Bhatt, Tailap, Singh, Jaipaul and Phoenix, David A. (2010) A theoretical analysis of secondary structural characteristics of anticancer peptides. Molecular and Cellular Biochemistry, 333 (1-2). pp. 129-135. ISSN 0300-8177
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Official URL: http://dx.doi.org/10.1007/s11010-009-0213-3
Here, cluster analysis showed that a database of 158 anticancer peptides formed 21 clusters based on net positive charge, hydrophobicity and amphiphilicity. In general, these clusters showed similar median toxicities (P = 0.176) against eukaryotic cell lines and no single combination of these properties was found optimal for efficacy. The database contained 14 peptides, which showed selectivity for tumour cell lines only (ACPCT), 123 peptides with general toxicity to eukaryotic cells (ACPGT) and 21 inactive peptides (ACPI). Hydrophobic arc size analysis showed that there was no significant difference across the datasets although peptides with wide hydrophobic arcs (>270°) appeared to be associated with decreased toxicity. Extended hydrophobic moment plot analysis predicted that over 50% of ACPCT and ACPGT peptides would be surface active, which led to the suggestion that amphiphilicity is a key driver of the membrane interactions for these peptides but probably plays a role in their efficacy rather than their selectivity. This analysis also predicted that only 14% of ACPCT peptides compared to 45% of ACPGT peptides were candidates for tilted peptide formation, which led to the suggestion that the absence of this structure may support cancer cell selectivity. However, these analyses predicted that ACPI peptides, which possess no anticancer activity, would also form surface active and tilted α-helices, clearly showing that other factors are involved in determining the efficacy and selectivity of ACPs.
|Uncontrolled Keywords (separate with ;):||Anticancer peptide ; Tumour cell lines ; Cell membrane ; Surface active α-helix ; Oblique orientated α-helix|
|Subjects:||R Medicine > RS Pharmacy and materia medica|
|Schools:||College of Clinical & Biomedical Sciences > School of Pharmacy and Biomedical Sciences|
|Deposited By:||Helen Cooper|
|Deposited On:||05 Aug 2010 17:10|
|Last Modified:||05 Mar 2013 11:00|
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