Browsing by Author "Marinotti, Osvaldo"
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- Integrated proteomic and transcriptomic analysis of the Aedes aegypti eggshellMarinotti, Osvaldo; Ngo, Tuan; Kojin, Bianca B.; Chou, Shao-Pei; Nguyen, Brian; Juhn, Jennifer; Carballar-Lejarazú, Rebeca; Marinotti, Pedro N.; Jiang, Xiaofang; Walter, Marika F.; Tu, Zhijian Jake; Gershon, Paul D.; James, Anthony A. (2014-04-05)Background Mosquito eggshells show remarkable diversity in physical properties and structure consistent with adaptations to the wide variety of environments exploited by these insects. We applied proteomic, transcriptomic, and hybridization in situ techniques to identify gene products and pathways that participate in the assembly of the Aedes aegypti eggshell. Aedes aegypti population density is low during cold and dry seasons and increases immediately after rainfall. The survival of embryos through unfavorable periods is a key factor in the persistence of their populations. The work described here supports integrated vector control approaches that target eggshell formation and result in Ae. aegypti drought-intolerant phenotypes for public health initiatives directed to reduce mosquito-borne diseases. Results A total of 130 proteins were identified from the combined mass spectrometric analyses of eggshell preparations. Conclusions Classification of proteins according to their known and putative functions revealed the complexity of the eggshell structure. Three novel Ae. aegypti vitelline membrane proteins were discovered. Odorant-binding and cysteine-rich proteins that may be structural components of the eggshell were identified. Enzymes with peroxidase, laccase and phenoloxidase activities also were identified, and their likely involvements in cross-linking reactions that stabilize the eggshell structure are discussed.
- Physical Mapping of the Anopheles (Nyssorhynchus) darlingi Genomic ScaffoldsRafael, Míriam Silva; Bridi, Leticia Cegatti; Sharakhov, Igor V.; Marinotti, Osvaldo; Sharakhova, Maria V.; Timoshevskiy, Vladimir; Guimarães-Marques, Giselle Moura; Santos, Valéria Silva; da Silva, Carlos Gustavo Nunes; Astolfi-Filho, Spartaco; Tadei, Wanderli Pedro (MDPI, 2021-02-15)The genome assembly of Anopheles darlingi consists of 2221 scaffolds (N50 = 115,072 bp) and has a size spanning 136.94 Mbp. This assembly represents one of the smallest genomes among Anopheles species. Anopheles darlingi genomic DNA fragments of ~37 Kb were cloned, end-sequenced, and used as probes for fluorescence in situ hybridization (FISH) with salivary gland polytene chromosomes. In total, we mapped nine DNA probes to scaffolds and autosomal arms. Comparative analysis of the An. darlingi scaffolds with homologous sequences of the Anopheles albimanus and Anopheles gambiae genomes identified chromosomal rearrangements among these species. Our results confirmed that physical mapping is a useful tool for anchoring genome assemblies to mosquito chromosomes.