Rediscovering an Endothelin Antagonist (BQ-123): A Self-Deconvoluting Cyclic Pentapeptide Library
摘要:
A ''self-deconvoluting'' cyclic pentapeptide library, designed to produce 82 944 head-to-tail-linked peptides in 48 vials, has been prepared. The mixture included amino acids found in a recently optimized endothelin antagonist, BQ-123, originally isolated from microbial sources bg Banyu investigators. Using a positional scan approach, the most potent of 12 residues at each of the four variable positions uniquely rediscovered the BQ-123 sequence or cyclo(L-Pro-D-Val-L-Leu-D-Trp-D-Asp). Resynthesis of the four most potent amino acid combinations gave the following values of relative potency: cyclo(L-Pro-D-Val-L-Leu-D-Trp-D-Asp) or BQ-123 = 1.0, cyclo(L-Pro-D-Pro-L-Leu-D-Trp-D-Asp) = 0.0, cyclo(L-Pro-D-Pro-L-Trp-D-Trp-D-Asp) = 0.0, and cyclo(L-Pro-D-Val-L-Trp-D-Trp-D-Asp) = 0.1. This study reflects the first time that the positional scan approach has been applied to cyclic peptide libraries using a known target, Although no analogs more potent than BQ-123 were discovered, our results provide verification of our synthetic methods for preparing head-to-tail cyclic peptide libraries and also lend support to the use of carefully designed sublibraries for the rapid elucidation of potential leads within a relatively constrained set of peptide macrocycles.
During our search for topically-active Caspase-1 inhibitors, we identified a novel class of potent inhibitors based on a 1,3,5-trisubstituted uracil motif equipped with an l-aspartate semi-aldehyde derived warhead. In the literature, the majority of Caspase-1 inhibitors possessing the same warhead have been designed and evaluated for oral administration as the ethyl acetal pro-drug form. For our topical
There is provided a morpholine derivative represented by General Formula [1A] or a salt thereof.
(In the formula, a ring A represents a ring represented by General Formula [I]; * represents a bonding position; Z
2
represents CH or the like; Z
1
represents CR
6
or the like; R
6
represents a hydrogen atom or the like; X
1
represents CHR
7
or the like; R
7
represents a hydrogen atom or the like; X
2
represents CH
2
or the like; R
1
and R
2
are the same as or different from each other, and each of R
1
and R
2
represents a hydrogen atom or the like; R
3
, R
4
, and R
5
are the same as or different from each other, and each of R
3
, R
4
, and R
5
represents a hydrogen atom, NR
a
R
b
, or the like; and each of R
a
and R
b
represents a hydrogen atom, a C
1-8
alkyl group which may have a substituent, or the like.)
提供一种由通用式[1A]表示的吗啉衍生物或其盐。
(在该式中,环A代表由通用式[I]表示的环;*代表连接位置;Z
2
代表CH或类似物;Z
1
代表CR
6
或类似物;R
6
代表氢原子或类似物;X
1
代表CHR
7
或类似物;R
7
代表氢原子或类似物;X
2
代表CH
2
或类似物;R
1
和R
2
相同或不同,且R
1
和R
2
中的每一个代表氢原子或类似物;R
3
,R
4
和R
5
相同或不同,且R
3
,R
4
和R
5
中的每一个代表氢原子,NR
a
R
b
或类似物;R
a
和R
b
中的每一个代表氢原子,可能具有取代基的C
1-8
烷基基团,或类似物。)
Inhibitors of protein tyrosine phosphatase
申请人:Pharmacia & Upjohn Company
公开号:US06353023B1
公开(公告)日:2002-03-05
The present invention comprises small molecular weight, non-peptidic inhibitors of formula I and II of Protein Tyrosine Phosphatase 1 (PTP1) which are useful for the treatment and/or prevention of Non-Insulin Dependent Diabetes Mellitus (NIDDM).
Morphological control of self-assembled multivalent (SAMul) heparin binding in highly competitive media
作者:Ana C. Rodrigo、Stephen M. Bromfield、Erik Laurini、Paola Posocco、Sabrina Pricl、David K. Smith
DOI:10.1039/c7cc02990j
日期:——
Shape control – self-assembly of ligands into different morphologies directs their ability to bind heparin.
形状控制 - 配体自组装成不同形态,指导它们与肝素结合的能力。
3-(Imidazolyl)-2-aminopropanoic acids
申请人:Pfizer Inc.
公开号:US20030191107A1
公开(公告)日:2003-10-09
Compounds according to formula (I) wherein n is 1-4, R
1
is optionally substituted C
1-6
alkyl, C
2-6
alkenyl, or C
2-6
alkynyl, Heterocycle, Aromatic heterocycle, Aryl or hydrogen and R
2
, R
3
, R
4
, R
5
, R
6
, R
7
and R
8
are each independently selected from hydrogen and optionally substituted C
1-6
alkyl are novel. They are useful in the treatment of thrombotic conditions and other pathologies associated with fibrin deposition.
1