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Group of chemical compounds From Wikipedia, the free encyclopedia
Aciculitins are antifungal cyclic peptides isolated from a marine sponge. There are 3 Aciculitins that are isolated from the Lithistid sponge Aciculites orientalis that differ by their homologous lipid residues.[1]
Aciculitin D is a similar cyclic peptide to Aciculitin A-C. It was isolated from Poecillastra sp. marine sponge that is collected from the deep sea.[2] Based on its molecular formula, Aciculitin D is the most similar to Aciculitin B structure wise since they only differ in one amino acid substitution.[2] The structure of Aciculitin B contains one extra glutamine while the structure of Aciculitin D has one extra L-Threonine. Although the two cyclic peptides contain slightly different amino acids, they still have the same overall charge because both glutamine and L-Threonine are considered neutral amino acids.
Aciculitin A-C exhibits cytotoxicity against human colon tumor cell line HCT-116 with IC50 value of 0.5 μg/mL. [1]
Aciculitin D exhibits cytotoxicity against human colon tumor cell line HCT-116 with IC50 value of 0.51 μM.[2] Aciculitin D also exhibits cytotoxicity against HeLa, human cervical cells with IC50 value of 0.57 μM. [2]
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