描述
2-(3-Carboxy-3-aminopropyl)-L-histidine is an unusual amino acid that results from the post-translational modification of histidine in certain proteins. In particular, it is a post-translational derivative of histidine that exists in protein synthesis elongation factor 2 (EF2) at the site of diphtheria toxin-catalyzed ADP-ribosylation of elongation factor 2. It is a precursor for diphthamide. This compound is a substrate for the enzyme diphthine synthase (EC 2.1.1.98). This enzyme catalyzes the chemical reaction: S-adenosyl-L-methionine + 2-(3-carboxy-3-aminopropyl)-L-histidine = S-adenosyl-L-homocysteine + 2-[3-carboxy-3-(methylammonio)propyl]-L-histidine. [HMDB]
InChI标识符
InChI=1S/C10H16N4O4/c11-6(9(15)16)1-2-8-13-4-5(14-8)3-7(12)10(17)18/h4,6-7H,1-3,11-12H2,(H,13,14)(H,15,16)(H,17,18)/t6?,7-/m0/s1