REDOX-STABLE, NON-PHOSPHORYLATED CYCLIC PEPTIDE INHIBITORS OF SH2 DOMAIN BINDING TO TARGET PROTEIN, CONJUGATES, THEREOF, COMPOSITIONS AND METHODS OF SYNTHESIS AND USE

摘要

A compound of formula: in which (i) aa¹ is Adi and aa⁴ is Glu or (ii) each of aa¹ and aa⁴ is Adi, L is sulfur, sulfoxide, oxygen or methylene, which compound (and its conjugates) bind to an SH2 domain in a protein comprising an SH2 domain, is non-phosphorylated, is redox-stable in vivo, is characterized by an IC₅₀ in vivo of less than about 4.0 muM with respect to the SH2 domain in Grb2, and, upon binding to the SH2 domain of Grb2, has a turn conformation. A conjugate comprising a compound as described above and a carrier agent, a composition comprising (i) a compound or a conjugate as described above and (ii) a carrier, a method of inhibiting binding of an SH2 domain in a protein comprising an SH2 domain to a target protein in an animal, wherein the SH2 domain is contacted with a target protein-binding inhibiting effective amount of a compound or a conjugate as described above, and a method of synthesizing such conjugates.