The First Direct Evaluation of the Two-Active Site Mechanism for Chitin Synthase
摘要:
Chitin synthase polymerizes UDP-GlcNAc to form chitin (poly-beta(1,4)-G1cNAc) and is essential for fungal cell wall biosynthesis. The alternating orientation of the GlcNAc residues within the chitin chain has led to the proposal that chitin synthase possesses two active sites. We report the results of the first direct test of this possibility. Two simple uridine-derived dimeric inhibitors are shown to exhibit 10-fold greater inhibition than a monomeric control, consistent with the presence of two active sites. This observation has important implications for the development of antifungal agents, as well as the understanding of polymerizing glycosyltransferases.
[EN] PRODRUGS OF THE TYROSINE KINASE INHIBITOR FOR TREATING CANCER<br/>[FR] PROMÉDICAMENTS DE L'INHIBITEUR DE TYROSINE KINASE POUR LE TRAITEMENT DU CANCER
申请人:RISEN SUZHOU PHARMA TECH CO LTD
公开号:WO2021035360A1
公开(公告)日:2021-03-04
There are provided compounds of Formula (I), and pharmaceutically acceptable salts and esters thereof, and pharmaceutical compositions thereof, useful for inhibition or modulation of the activity of tyrosine kinases and treatment of disease states or conditions mediated by tyrosine kinases, including cancers. (I)
The invention concerns pharmaceutically useful trifluoromethyl ketone substituted di-, tri- and tetra-peptide derivatives of the formulae Ia, Ib, Ic set out hereinafter, and salts thereof, which are inhibitors of human leukocyte elastase. Also described herein are pharmaceutical compositions containing a peptide derivative and processes and intermediates for use in the manufacture of the peptide derivatives.
DENDRIMER CONJUGATES OF AGONISTS AND ANTAGONISTS OF THE GPCR SUPERFAMILY
申请人:Jacobson Kenneth A.
公开号:US20090012035A1
公开(公告)日:2009-01-08
Disclosed are conjugates comprising a dendrimer and a ligand, which is a functionalized congener of an agonist or antagonist of a receptor of the G-protein coupled receptor (GPCR) superfamily, for example, wherein the functionalized congener is an A
1
adenosine receptor agonist having a purine nucleoside moiety and a functional group at the N
6
position of the purine nucleoside moiety, wherein the functional group has the formula (I): N
6
H—Ar
1
—CH
2
—C(═O)NH—R
1
(I), wherein Ar
1
and R
1
as defined herein. Also disclosed are pharmaceutical compositions, methods of treating various diseases, and a diagnostic method employing such conjugates.
Synthesis and In Vitro Transdermal Penetration of Methoxypoly(ethylene glycol) Carbonate and Carbamate Derivatives of Lamivudine (3TC)
作者:Jaco van Heerden、Jaco C. Breytenbach、David D. N'Da、J. Wilma Breytenbach、Jan L. du Preez
DOI:10.2174/157340610791321433
日期:2010.3.1
glycol) (MPEG) carbamates and carbonates in phosphate buffer solution and with the use of Pheroid as delivery system and to establish a relationship, if any, with selected physicochemical properties. The synthesis and in vitro human skin permeation flux of three N4-methoxypoly(ethylene glycol) carbamates (3)-(5) and three 6'-O-methoxypoly(ethylene glycol) carbonates (6)-(8) of lamivudine are reported
The present invention provides polypeptides that include an O-linked glycosylation site that is not present in the wild-type peptide. The polypeptides of the invention include glycoconjugates in which a species such as a water-soluble polymer, a therapeutic agent of a biomolecule is covalently linked through an intact O-linked glycosyl residue to the polypeptide. Also provided are methods of making the peptides of the invention and methods, pharmaceutical compositions containing the peptides and methods of treating, ameliorating or preventing diseased in mammals by administering an amount of a peptide of the invention sufficient to achieve the desired response.