4249-25-6Relevant articles and documents
Development of peptidomimetic hydroxamates as PfA-M1 and PfA-M17 dual inhibitors: Biological evaluation and structural characterization by cocrystallization
Addlagatta, Anthony,Ding, Yongzheng,Ma, Chunhua,Marapaka, Anil Kumar,Pillalamarri, Vijaykumar,Reddi, Bharati,Sankoju, Priyanka,Sijwali, Puran Singh,Sudhakar, Renu,Zhang, Guozhen,Zhang, Yingjie
supporting information, (2021/12/01)
Plasmodium parasites causing malaria have developed resistance to most of the antimalarials in use, including the artemisinin-based combinations, which are the last line of defense against malaria. This necessitates the discovery of new targets and the development of novel antimalarials. Plasmodium falciparum alanyl aminopeptidase (PfA-M1) and leucyl aminopeptidase (PfA-M17) belong to the M1 and M17 family of metalloproteases respectively and play critical roles in the asexual erythrocytic stage of development. These enzymes have been suggested as potential antimalarial drug targets. Herein we describe the development of peptidomimetic hydroxamates as PfA-M1 and PfA-M17 dual inhibitors. Most of the compounds described in this study display inhibition at sub-micromolar range against the recombinant PfA-M1 and PfA-M17. More importantly, compound 26 not only exhibits potent malarial aminopeptidases inhibitory activities (PfA-M1 Ki = 0.11 ± 0.0002 μmol/L, PfA-M17 Ki = 0.05 ± 0.005 μmol/L), but also possesses remarkable selectivity over the mammalian counterpart (pAPN Ki = 17.24 ± 0.08 μmol/L), which endows 26 with strong inhibition of the malarial parasite growth and negligible cytotoxicity on human cell lines. Crystal structures of PfA-M1 at atomic resolution in complex with four different compounds including compound 26 establish the structural basis for their inhibitory activities. Notably, the terminal ureidobenzyl group of 26 explores the S2′ region where differences between the malarial and mammalian enzymes are apparent, which rationalizes the selectivity of 26. Together, our data provide important insights for the rational and structure-based design of selective and dual inhibitors of malarial aminopeptidases that will likely lead to novel chemotherapeutics for the treatment of malaria.
Diversity of Secondary Structure in Catalytic Peptides with β-Turn-Biased Sequences
Metrano, Anthony J.,Abascal, Nadia C.,Mercado, Brandon Q.,Paulson, Eric K.,Hurtley, Anna E.,Miller, Scott J.
supporting information, p. 492 - 516 (2017/02/23)
X-ray crystallography has been applied to the structural analysis of a series of tetrapeptides that were previously assessed for catalytic activity in an atroposelective bromination reaction. Common to the series is a central Pro-Xaa sequence, where Pro is either l- or d-proline, which was chosen to favor nucleation of canonical β-turn secondary structures. Crystallographic analysis of 35 different peptide sequences revealed a range of conformational states. The observed differences appear not only in cases where the Pro-Xaa loop-region is altered, but also when seemingly subtle alterations to the flanking residues are introduced. In many instances, distinct conformers of the same sequence were observed, either as symmetry-independent molecules within the same unit cell or as polymorphs. Computational studies using DFT provided additional insight into the analysis of solid-state structural features. Select X-ray crystal structures were compared to the corresponding solution structures derived from measured proton chemical shifts, 3J-values, and 1H-1H-NOESY contacts. hese findings imply that the conformational space available to simple peptide-based catalysts is more diverse than precedent might suggest. The direct observation of multiple ground state conformations for peptides of this family, as well as the dynamic processes associated with conformational equilibria, underscore not only the challenge of designing peptide-based catalysts, but also the difficulty in predicting their accessible transition states. These findings implicate the advantages of low-barrier interconversions between conformations of peptide-based catalysts for multistep, enantioselective reactions.
2-Benzoyl-2-ethoxycarbonylvinyl-l and 2-Benzoylamino-2-methoxy-carbonylvinyl-1 as N-Protecting Groups in Peptide Synthesis. Their Application in the Synthesis of Dehydropeptide Derivatives Containing N-Terminal 3-Heteroarylamino-2,3-dehydroalanine
Svete, Jurij,Aljaz-Rozic, Mateja,Stanovnik, Branko
, p. 177 - 193 (2007/10/03)
Ethyl 2-benzoyl-3-dimethylaminopropenoate (6) and methyl 2-benzoylamino-3-dimethylaminopropenoate (46) were used as reagents for the protection of the amino group with 2-benzoyl-2-ethoxycarbonylvinyl-1 and 2-benzoylamino-2-methoxycarbonylvinyl groups in t
