(R)-1,2,3,4-Tetrahydro-3-isoquinolinecarboxylic acid

(R)-1,2,3,4-Tetrahydro-3-isoquinolinecarboxy acid 是一种受约束的 Phe 类似物，可以折叠成β-弯曲和螺旋结构，并在肽中采用优选的侧链排列。

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库存: 现货

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100mg

￥637.00

510.00

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货号: ajce51390
CAS: 103733-65-9
别名: D-1,2,3,4-四氢异喹啉-3-羧酸,D-phenylalanine analogue
分子式: C10H11NO2
分子量: 177.2
纯度: >98%
溶解度: Soluble in DMSO
储存: Store at -20°C
库存: 现货

Background

(R)-1,2,3,4-Tetrahydro-3-isoquinolinecarboxylic acid is a constrained Phe analogue which can fold into a beta-bend and a helical structure, and to adopt a preferred side-chain disposition in the peptide.IC50 value:Target: Three Tic-containing (Tic = 1,2,3,4-tetrahydroisoquinoline-3-carboxylic acid) model peptides were synthesized to assess the tendency of this constrained Phe analogue to fold into a beta-bend and a helical structure, and to adopt a preferred side-chain disposition. The results of the solution conformational analysis, performed by using Fourier transform infrared absorption and 1H nuclear magnetic resonance, indicate that in chloroform the -Aib-D-Tic-Aib-, -(Aib)2-D-Tic-(Aib)2-, and -L-Pro-D-Tic- sequences fold into intramolecularly H-bonded forms to a great extent. An X-ray diffraction analysis on p-BrBz-(Aib)2-DL-Tic-(Aib)2-OMe monohydrate and p-BrBz-L-Pro-D-Tic-NHMe allows us to conclude that, while the pentapeptide methylester forms an incipient (distorted) 3(10)-helix, the dipeptide methylamide adopts a type-II beta-bend conformation. In both cases, the D-Tic side-chain conformation is D, gauche(-). The implications for the use of the Tic residue in designing conformationally restricted analogues of bioactive peptides are briefly discussed.

[1]. Valle G, et al. Constrained phenylalanine analogues. Preferred conformation of the 1,2,3,4-tetrahydroisoquinoline-3-carboxylic acid (Tic) residue. Int J Pept Protein Res. 1992 Sep-Oct;40(3-4):222-32.