H
Hector Barrabin
Researcher at Federal University of Rio de Janeiro
Publications - 47
Citations - 694
Hector Barrabin is an academic researcher from Federal University of Rio de Janeiro. The author has contributed to research in topics: ATPase & Na+/K+-ATPase. The author has an hindex of 14, co-authored 47 publications receiving 662 citations.
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Journal ArticleDOI
Adenosinetriphosphatase site stoichiometry in sarcoplasmic reticulum vesicles and purified enzyme.
TL;DR: The stoichiometry of phosphorylation (catalytic) sites in sarcoplasmic reticulum vesicles and SR ATPase purified by differential solubilization with deoxycholate was found to be 4.77 +/-0.4 and 6.05 +/- 0.18 nmol/mg of protein, respectively, whenosphorylation was carried out under conditions permitting 32P labeling of nearly all sites.
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Gill microsomal (Na+,K+)-ATPase from the blue crab Callinectes danae: Interactions at cationic sites.
D. C. Masui,Rosa dos Prazeres Melo Furriel,E. C. C. Silva,Fernando L. Mantelatto,John Campbell McNamara,Hector Barrabin,Helena M. Scofano,Carlos Frederico Leite Fontes,Francisco A. Leone +8 more
TL;DR: It is reported that Na+ binding at the activating site leads to cooperative, heterotropic interactions that are insensitive to K+.
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Visualizing the 3D Architecture of Multiple Erythrocytes Infected with Plasmodium at Nanoscale by Focused Ion Beam-Scanning Electron Microscopy
Lia Carolina Soares Medeiros,Wanderley de Souza,Chengge Jiao,Hector Barrabin,Kildare Miranda +4 more
TL;DR: The results show the complex 3D organization of Plasmodium and infected erythrocyte, and demonstrate the contribution of FIB-SEM for the obtainment of statistical data for an accurate interpretation of complex biological structures.
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Tomatidine promotes the inhibition of 24-alkylated sterol biosynthesis and mitochondrial dysfunction in Leishmania amazonensis promastigotes.
Jorge Mansur Medina,Juliany Cola Fernandes Rodrigues,W. De Souza,Georgia C. Atella,Hector Barrabin +4 more
TL;DR: Tomatidine inhibited parasite growth in a dose-dependent manner and was consistent with an inhibition of 24-sterol methyltransferase, an important enzyme responsible for the methylation of sterols at the 24 position, which is an essential step in the production of ergosterol and other 24-methyl sterols.
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The gamma subunit of Na+, K+-ATPase: role on ATPase activity and regulatory phosphorylation by PKA.
Vanessa Faria Cortes,Fabio Eduardo Veiga-Lopes,Hector Barrabin,Marcelo Alves-Ferreira,Carlos Frederico Leite Fontes +4 more
TL;DR: In this article, the effects of gamma subunit on Na+, K+-ATPase were dose-dependent and pre-incubation-dependent, and they showed that PKA phosphorylation increased the capacity to stimulate ATP hydrolysis.