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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Detergent-resistant domains in Spodoptera frugiperda midgut microvillar membranes and their relation to microapocrine secretion

Texto completo
Autor(es):
Fuzita, Felipe J. [1] ; Pimenta, Daniel C. [2] ; Palmisano, Giuseppe [3] ; Terra, Walter R. [1] ; Ferreira, Clelia [1]
Número total de Autores: 5
Afiliação do(s) autor(es):
[1] Univ Sao Paulo, Inst Quim, Dept Bioquim, Ave Prof Lineu Prestes 748, BR-05508000 Sao Paulo - Brazil
[2] Inst Butantan, Lab Bioquim & Biofis, Ave Vital Brasil 1500, BR-05503900 Sao Paulo - Brazil
[3] Univ Sao Paulo, Inst Ciencias Biomed, Dept Parasitol, BR-05508000 Sao Paulo - Brazil
Número total de Afiliações: 3
Tipo de documento: Artigo Científico
Fonte: COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY B-BIOCHEMISTRY & MOLECULAR BIOLOGY; v. 235, p. 8-18, SEP 2019.
Citações Web of Science: 0
Resumo

The midgut from lepidopteran insects has a particular way to release proteins to the lumen, named microapocrine secretion that could be an adaptation to release secretory contents into the lumen at water absorbing regions. In this process small vesicles (microapocrine vesicles) bud from the midgut microvilli as double membrane vesicles, where the inner membrane comes from the secretion vesicle and the outer one from the microvillar membrane. The molecular machinery associated with this process may be recruited by specific midgut microvilli membrane domains. To address to this, Spodoptera frugiperda midgut microvillar membranes, prepared by magnesium treatment and free from cytoskeleton with the hyperosmotic Tris procedure, were submitted to detergent extraction and fractionated by density gradient ultracentrifugation. Detergent-resistant membrane domains (DRM) were recovered and their proteins identified by proteomics. Microapocrine vesicles were isolated by washing the lumina] surface of the midgut epithelium, followed by freezing and thawing plus centrifugation to recover only membranes. Proteins from purified microvillar membranes and microapocrine vesicle membranes were identified by proteomics. Comparison of the two populations suggests that the budding of microapocrine vesicles surrounded by microvillar membrane is not a random process, because only around 50% of the microvillar membrane proteins are in the microapocrine vesicles. From the 16 proteins from DRM, 14 were enriched in the microapocrine membrane vesicles. These results suggest that on budding, the microapocrine vesicle membrane is enclosed by DRM and a surrounding area of the microvillar membrane. It is proposed that the DRMs somehow recruit the proteins composing the secretory machinery. (AU)

Processo FAPESP: 17/08103-4 - A digestão nos insetos: uma abordagem molecular, celular, fisiológica e evolutiva
Beneficiário:Walter Ribeiro Terra
Linha de fomento: Auxílio à Pesquisa - Temático
Processo FAPESP: 14/14183-2 - Membranas microvilares intestinais e suas vesículas secretoras no Lepidoptera Spodoptera frugiperda e no Diptera Musca domestica
Beneficiário:Felipe Jun Fuzita
Linha de fomento: Bolsas no Brasil - Pós-Doutorado
Processo FAPESP: 14/06863-3 - Modificações pós-traducionais para o diagnóstico de câncer e doenças parasitárias: abordagens metodológicas e implicações biológicas
Beneficiário:Giuseppe Palmisano
Linha de fomento: Auxílio à Pesquisa - Apoio a Jovens Pesquisadores