175133-83-2Relevant academic research and scientific papers
Protein synthesis with conformationally constrained cyclic dipeptides
Bai, Xiaoguang,Dedkova, Larisa M.,Hecht, Sidney M.,Zhang, Chao
, (2020/10/02)
We have synthesized several conformationally constrained dipeptide analogues as possible substrates for incorporation into proteins. These have included three cyclic dipeptides formed from Boc derivatives of 2,4-diaminobutyric acid, ornithine and lysine, having 5-, 6-, and 7-membered lactam rings, respectively. These dipeptides were used to activate a suppressor tRNA transcript, the latter of which had been prepared by in vitro transcription. Using modified E. coli ribosomes described previously, these activated suppressor tRNAs enabled the incorporation of the three cyclic dipeptides into dihydrofolate reductase (DHFR) at positions 18 and 49. The suppression yields increased with increasing lactam ring size and were found to proceed in suppression yields ranging from 3.4 to 8.9% at two different protein sites for the 5-, 6- and 7-membered lactam dipeptides. The greater facility of incorporation of the 7-membered lactam prompted us to prepare two 7-membered cyclic acylhydrazides (4 and 5) by 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide (EDCI)-mediated cyclization of amino acids having selectively protected hydrazine functional groups in their side chains. In common with the lactam dipeptides, acylhydrazide dipeptides 4 and 5 could be used to activate the same suppressor tRNA transcript and to incorporate the cyclic dipeptides into DHFR. They were incorporated into the same two DHFR sites in suppression yields ranging from 8.3 to 11.2%.
RIBOSOME-MEDIATED INCORPORATION OF PEPTIDES AND PEPTIDOMIMETICS
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, (2016/08/17)
Modified ribosomes that were selected using a dipeptidyl-puromycin aminonucleoside are used to mediate site-specific incorporation of one or more peptides and peptidomimetics into protein in a cell free translation system. In addition, new fluorescent dipeptidomimetics have been synthesized and incorporated into proteins, as well as modified proteins containing one or more non-naturally occurring dipeptides.
Design, synthesis, and structure-activity relationships of unsubstituted piperazinone-based transition state factor Xa inhibitors
Huang, Wenrong,Naughton, Mary Ann,Yang, Hua,Su, Ting,Dam, Suiko,Wong, Paul W.,Arfsten, Ann,Edwards, Susan,Sinha, Uma,Hollenbach, Stanley,Scarborough, Robert M.,Zhu, Bing-Yan
, p. 723 - 728 (2007/10/03)
A series of novel transition state factor Xa inhibitors containing a variety of lactam ring systems as central templates was synthesized in an expedient manner and allowed for a great deal of structural variability. Among them, the piperazinone-based inhibitors were found to be not only active against factor Xa but also selective over thrombin. Optimization of the P4 moiety yielded several potent compounds with IC50 below 1 nM against factor Xa.
3-AMINO-2-OXO-1-PIPERIDINEACETIC DERIVATIVES CONTAINING AN ARGININE MIMIC AS ENZYME INHIBITORS
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, (2008/06/13)
The present invention discloses peptide aldehydes having a lactam group as part of the peptide backbone and having an original mimic group such as an amidinopiperidine or amidinophengyl tail. These compounds are potent and specific inhibitors of thrombin,
Potent and selective thrombin inhibitors featuring hydrophobic, basic P3-P4-aminoalkyllactam moieties
Semple, J. Edward,Rowley, David C.,Owens, Timothy D.,Minami, Nathaniel K.,Uong, Theresa H.,Brunck, Terence K.
, p. 3525 - 3530 (2007/10/03)
Crystal structure and evolving SAR considerations of potent, selective benzylsulfonamide lactam thrombin inhibitors and related serine protease inhibitors have led to the design of novel thrombin inhibitors lag, featuring hydrophobic, basic, P4-alkylaminolactam scaffolds that serve as novel types of P3-P4 dipeptide mimics. The design, synthesis, and biological activity of these targets is presented.
