H-His-Trp-OH
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H-His-Trp-OH

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The dipeptide Trp-His inhibits the development of atherosclerosis onsets in ApoE -/- mice.

Category
Peptide Inhibitors
Catalog number
BAT-014903
CAS number
23403-90-9
Molecular Formula
C17H19N5O3
Molecular Weight
341.36
H-His-Trp-OH
IUPAC Name
(2S)-2-[[(2S)-2-amino-3-(1H-imidazol-5-yl)propanoyl]amino]-3-(1H-indol-3-yl)propanoic acid
Synonyms
His-Trp; L-histidyl-L-tryptophan; Histidinyl-Tryptophan; HW dipeptide; Histidine Tryptophan dipeptide
Sequence
H-His-Trp-OH
Storage
Store at -20°C
InChI
InChI=1S/C17H19N5O3/c18-13(6-11-8-19-9-21-11)16(23)22-15(17(24)25)5-10-7-20-14-4-2-1-3-12(10)14/h1-4,7-9,13,15,20H,5-6,18H2,(H,19,21)(H,22,23)(H,24,25)/t13-,15-/m0/s1
InChI Key
FBTYOQIYBULKEH-ZFWWWQNUSA-N
Canonical SMILES
C1=CC=C2C(=C1)C(=CN2)CC(C(=O)O)NC(=O)C(CC3=CN=CN3)N
1. Thermal perturbation spectrophotometry of luliberin and model His-Trp peptides
J Bello, H R Bello, S Aimoto Int J Pept Protein Res. 1981 Apr;17(4):460-8. doi: 10.1111/j.1399-3011.1981.tb02015.x.
Thermal perturbation (TP) spectra of luliberin were measured at pH 5-8, and compared with the model chromophores N-Ac-Tyr-NH2, N-Ac-Trp-NH2, t-Boc-His-Trp-NH2, H-His-Trp-OH, Ac-His-Trp-OH, tryptophan and cyclo-[His-Trp] (all L-isomers). Between pH 5 and neutrality, the major TP extremum of the Trp3 residue of luliberin increases by about 50%. A similar effect is seen for luliberin acetylated on Tyr5. The effect with luliberin is attributed to the protonation of the His2 residue. One proposed explanation is that the protonated imidazole orients water around the nearby indole in a different way than does unprotonated imidazole. The Tyr5 residue of luliberin behaves like N-Ac-Tyr-NH2, and is considered to be well exposed to solvent. The TP spectra of N-Ac-Trp-NH2, t-Boc-His-Trp-NH2, Ac-His-Trp-OH, and cyclo-[His-Trp] are pH-independent from pH 5 to 8. The TP spectrum of H-His-Trp-NH2 has a bell-shaped pH dependence, rising from normal at pH 3.5 to above normal at pH 6, and returning to normal at pH 8. Luliberin and model peptides show that fluorescence and TP spectra of His-Trp sequences can respond differently to pH.
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