H-D-Trp-OH

H-D-Trp-OH (CAS No.: 153-94-6) is the D-enantiomer of tryptophan, a member of the standard amino acid family distinguished by its indole-containing side chain, and is primarily utilized in biochemical and pharmacological research as a non-proteinogenic analog. Although L-tryptophan is the biologically encoded form incorporated into proteins via the UGG codon, the D-isomer occurs sporadically in naturally derived peptides, including certain marine toxin peptides such as contryphan, highlighting its relevance in studies of peptide structure, stability, and bioactivity. H-D-Trp-OH has been investigated for its role in modulating microbial ecosystems, with experimental observations indicating its capacity to influence intestinal microbiota composition and diversity, suggesting involvement in host–microbe interaction pathways and immunologically relevant signaling processes. While precise molecular targets remain incompletely characterized, its activity is generally associated with amino acid sensing pathways, microbial metabolism, and peptide-mediated signaling mechanisms, with functional effects typically observed in the micromolar concentration range in vitro depending on the experimental system. This compound is widely applied in peptide synthesis, stereochemical investigations, and studies of enzyme specificity, as well as in cellular and animal models examining microbiome dynamics and inflammation-related processes, where dosing and concentration parameters are adjusted according to specific experimental objectives.