methylations

Cycloleucine is an antagonist of NMDA receptor associated glycine receptor with a Ki of 600 μM. Cycloleucine is also a competitive inhibitor of S-adenosyl-methionine mediated methylation with anxiolytic and cytostatic effects.

NF(N-Me)GA(N-Me)IL is a biologically active peptide, representing a modified segment (amino acids 22 to 27) of the human islet amyloid polypeptide (hIAPP) sequence NFGAIL. This modification includes N-methylations at G24 and I26, transforming the amyloidogenic and cytotoxic nature of the original sequence into a non-amyloidogenic and non-cytotoxic variant. Moreover, the peptide maintains the ability to bind with high affinity to full-length hIAPP, effectively inhibiting its fibril formation.

F(N-Me)GA(N-Me)IL is a bioactive peptide derived from a partial IAPP sequence that contains double N-methylations. These modifications prevent the peptide from forming β-sheet structures and exhibiting amyloidogenicity or cytotoxicity. Additionally, the derivatives can interact with native sequences to inhibit amyloid formation.