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Updated: Apr 17, 2026

Methods to Investigate the Regulatory Role of Small RNAs and Ribosomal Occupancy of Plasmodium falciparum
Published on: December 4, 2015
Ribifolin, an orbitide from Jatropha ribifolia, and its potential antimalarial activity
Meri Emili F Pinto1, João M Batista1,2, Johannes Koehbach3,4
1†Institute of Chemistry, São Paulo State University-UNESP, 14800-060, Araraquara, São Paulo, Brazil.
Abstract:
A new orbitide named ribifolin was isolated and characterized from Jatropha ribifolia using mass spectrometry, NMR spectroscopy, quantitative amino acid analysis, molecular dynamics/simulated annealing, and Raman optical activity measurements and calculations. Ribifolin (1) and its linear form (1a) were synthesized by solid-phase peptide synthesis, followed by evaluation of its antiplasmodial and cytotoxicity activities. Compound 1 was moderately effective (IC50 = 42 μM) against the Plasmodium falciparum strain 3D7.
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