Publicaciones 2011-2020

@article{RN196,
title = {Molecular Characterization and in Silico Analysis of the Pheromone-Binding Protein of the European Grapevine Moth Lobesia Botrana (Denis & Schiffermuller) (Lepidoptera, Tortricidae)},
author = { A. Mutis and R. Palma and H. Venthur and P. Iturriaga-Vasquez and M. Faundez-Parraguez and R. Mella-Herrera and D. Kontodimas and C. Lobos and A. Quiroz},
url = {/brokenurl#<Go to ISI>://WOS:000335640500010},
doi = {10.1007/s13744-014-0212-2},
issn = {1519-566x},
year = {2014},
date = {2014-01-01},
journal = {Neotropical Entomology},
volume = {43},
number = {3},
pages = {266-275},
abstract = {The European grapevine moth Lobesia botrana (Denis & Schiffermuller) is an economically important insect in Europe. The species invaded vineyards in Chile, Argentina, and California during 2008-2010 causing severe problems. A major component of the sex pheromone, (E,Z)-7,9-dodecadienyl acetate (E7,Z9-12:Ac), is used in a mating disruption technique when grapevine moth populations are low or to monitor pest numbers. It is thought that these sexual pheromones are blends of volatiles that typically are specific to a species and are transported in the insect antenna by pheromone-binding proteins (PBPs) across the sensillar lymph to the olfactory receptors. Currently, an increasing number of Lepidopteran PBPs are being identified and cloned. However, there are no studies of the olfactory system and of proteins involved in the olfactory perception of L. botrana at the molecular level. In the present study, we report, for the first time, the sequence of a PBP from L. botrana (LbotPBP), which was determined using reverse transcription technology. Homology modeling was used to generate the three-dimensional protein structure. The model suggests that PBP consists of six alpha-helices as follows: Lys2-Met23 (alpha 1), Thr28-Phe36 (alpha 2), Arg46-Leu59 (alpha 3), His70-Asn80 (alpha 4), Glu84-Asn100 (alpha 5), and Cys108-Lys125 (alpha 6), held together by three disulfide bridges, Cys19-Cys54, Cys50-Cys108, and Cys97-Cys117. Docking simulations based on this model suggested that Trp114 is a keywords residue in the recognition of acetate pheromones, such as E7,Z9-12:Ac. In silico results in this study are consistent with previous findings in which E7,Z9-12:Ac acts as the most active compound in behavioral and electroantennographic assays.},
keywords = {alignment, anopheles-gambiae, antheraea-polyphemus, binding bombyx-mori, chemical crystal-structure, docking, ecology, ligand lymantria-dispar, modeling, molecular multiple nmr pheromone-binding protein, release, sequence sex-pheromone, site, structure, z)-7},
pubstate = {published},
tppubtype = {article}
}

@article{RN19h,
title = {Esr, Electrochemical, Molecular Modeling and Biological Evaluation of 4-Substituted and 1,4-Disubstituted 7-Nitroquinoxalin-2-Ones as Potential Anti-Trypanosoma Cruzi Agents},
author = { B. Aguilera-Venegas and C. Olea-Azar and E. Norambuena and V.J. Aran and F. Mendizabal and M. Lapier and J.D. Maya and U. Kemmerling and R. Lopez-Munoz},
url = {/brokenurl#<Go to ISI>://WOS:000288046600012},
doi = {10.1016/j.saa.2010.12.017},
issn = {1386-1425},
year = {2011},
date = {2011-01-01},
journal = {Spectrochimica Acta Part a-Molecular and Biomolecular Spectroscopy},
volume = {78},
number = {3},
pages = {1004-1012},
publisher = {2010 Elsevier B.V.},
abstract = {Electrochemical and ESR studies were carried out in this work with the aim of characterizing the reduction mechanisms of 4-substituted and 1,4-disubstituted 7-nitroquinoxalin-2-ones by means of cyclic voltammetry in DMSO as aprotic solvent. Two reduction mechanisms were found for these compounds: the first, for compounds bearing a labile hydrogen by following a self-protonation mechanism (ECE steps), and the second, for compounds without labile hydrogen, based on a purely electrochemical reduction mechanism (typical of nitroheterocycles). The electrochemical results were corroborated using ESR spectroscopy allowing us to propose the hyperfine splitting pattern of the nitro-radical, which was later corroborated by the ESR simulation spectra. All these compounds were assayed as growth inhibitors against Trypanosoma cruzi: first, on the non-proliferative (and infective) form of the parasite (trypomastigote stage), and then, the ones that displayed activity, were assayed on the non-infective form (epimastigote stage). Thus, we found four new compounds highly active against T. cruzi. Finally, molecular modeling studies suggest the inhibition of the trypanothione reductase like one of the possible mechanisms involved in the trypanocidal action.},
keywords = {anion, behavior binding-site, chagas chagas-disease, complexes, crystal-structure, disease, epimastigote, esr, glutathione-reductase, modeling, molecular nifurtimox, nitro nitroquinoxaline, radical-anion, reductase, superoxide trypanothione trypomastigote},
pubstate = {published},
tppubtype = {article}
}