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Dissertacao Lacerda CD.pdf: 1763421 bytes, checksum: 9db822a6306602d4f7c830ea507fcc4a (MD5) / Made available in DSpace on 2016-06-27T18:49:55Z (GMT). No. of bitstreams: 2
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Dissertacao Lacerda CD.pdf: 1763421 bytes, checksum: 9db822a6306602d4f7c830ea507fcc4a (MD5) / Uma nova isoforma tripsina bovina foi purificada a partir de amostras comerciais por cromatografia de troca iônica por Sephadex SP C50®. A nova isoforma contém, além da perda do hexapeptídeo N-terminal (como encontrado na molécula progenitora β-tripsina) uma clivagem intra-cadeia entre o Lys-155 e Ser-156. A nova enzima denominada -tripsina mostrou propriedades similares com a isoforma α-tripsina que contém o mesmo número de cadeia polipeptídica (duas cadeias), massa molecular (23312 Da), estrutura secundária, volume hidrodinâmico e outros. Apesar das semelhanças estruturais e enzimáticas dessas duas isoformas, -tripsina tem uma taxa de formação inferior a partir da β-tripsina, carga superficial inferior, mas a -tripsina tem estabilidade térmica mais elevada do que a α-tripsina. Devido à facilidade de purificação das isoformas a partir de tripsina bovina de fonte comercial, e as propriedades descritas acima, esta enzima tornar-se uma alternativa interessante para a indústria de alimentos e de detergente, bem como para pesquisa de biocatalisadores. / A novel bovine trypsin isoform was purified from commercial sample by ion exchange chromatography by Sephadex SP C50®. New isoform contain in addition of loss of N- terminus hexapeptide (as found in parent molecule β-trypsin) an intra-chain split between Lys-155 and Ser-156. The novel enzyme denominate gamma-trypsin showed similar properties with α-trypsin isoform in: polypeptide number chain (two chain), molecular masses (23,312 Da), secondary structure, hydrodynamic radius and others. In spite of enzymatic and structural similarities of both isoforms, -trypsin preferably has a lower rate formation from β-trypsin, a lower surface charge, but the gamma-trypsin has a higher thermal stability than α-trypsin. Due to obtaining facility of purification of bovine trypsin isoforms from commercial font, and properties described above, become this enzyme an interesting alternative for the food industry, detergent and biocatalysis research.
| Identifer | oai:union.ndltd.org:IBICT/oai:dspace2.ufes.br:10/1976 |
| Date | 26 June 2014 |
| Creators | Lacerda, Caroline Dutra |
| Contributors | Santana, Marcos Aurélio de Santana, Ribeiro, Joselito Nardy, Pires, Rita Gomes Wanderley, Santos, Alexandre Martins Costa |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Format | text |
| Source | reponame:Repositório Institucional da UFES, instname:Universidade Federal do Espírito Santo, instacron:UFES |
| Rights | info:eu-repo/semantics/openAccess |
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