Szókán G, Almás M, Krizsán K, Khlafulla AR, Tyihák E, Szende B. Structure determination and synthesis of lysine isopeptides influencing on cell proliferation.
Biopolymers 1997;
42:305-18. [PMID:
9279124 DOI:
10.1002/(sici)1097-0282(199709)42:3<305::aid-bip4>3.0.co;2-q]
[Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The clavicepamines are lysine-rich basic proteins isolated from saprophytic culture of ergot (Claviceps purpurea), having human pharmacological importance. Based on structure determinations, it was demonstrated that the epsilon-lysine (poly)peptides are the fundamental structural units of clavicepamines. To study the relationship between chemical structure and biological effect, solution and solid-phase synthesis of lysine isopeptides were performed. Poly-epsilon-lysines were synthesized with polycondensation via application of p-nitrophenylester temporarily protecting groups together with simultaneous activation. The biological investigations of poly-epsilon-lysines showed a cell-proliferation retarding effect, so they inhibit growth of some animal tumors, practically without toxic side effects.
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