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Carmo ACV, Yamasaki LHT, Figueiredo CA, da Silva Giovanni DN, de Oliveira MI, Dos Santos FCP, Curti SP, Rahal P, Mendonça RZ. Discovery of a new antiviral protein isolated Lonomia obliqua analysed by bioinformatics and real-time approaches. Cytotechnology 2014; 67:1011-22. [PMID: 24908059 PMCID: PMC4628924 DOI: 10.1007/s10616-014-9740-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2013] [Accepted: 05/03/2014] [Indexed: 11/29/2022] Open
Abstract
This study presents a new recombinant protein that acts as a powerful antiviral (rAVLO—recombinant Antiviral protein of Lonomia obliqua). It was able to reduce the replication by 106 fold for herpes virus and by 104 fold for rubella virus. RT-PCR of viral RNA rAVLO treated infected cells also showed similar rate of inhibition in replication. The analysis of this protein by bioinformatics suggests that this protein is globular, secreted with a signal peptide and has the ability to bind to MHC class I. It was found that there are several protein binding sites with various HLA and a prevalence of α-helices in the N-terminal region (overall classified as a α/β protein type). BLAST similarity sequence search for corresponding cDNA did not reveal a similar sequence in Genbank, suggesting that it is from a novel protein family. In this study we have observed that this recombinant protein and hemolymph has a potent antiviral action. This protein was produced in a baculovirus/Sf-9 system. Therefore, these analyses suggest that this novel polypeptide is a candidate as a broad spectrum antiviral.
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Affiliation(s)
| | | | | | - Dalton Nogueira da Silva Giovanni
- Laboratório de Parasitologia, Instituto Butantan, São Paulo, Cep. 05503-000, Brazil.,Laboratório de Estudos Genômicos, IBILCE-UNESP, São Paulo, Brazil.,Núcleo de Doenças Respiratórias, Centro de Virologia, Instituto Adolfo Lutz, São Paulo, Brazil.,Núcleo de Doenças de Transmissão Vetorial, Centro de Virologia, Instituto Adolfo Lutz, São Paulo, Brazil
| | | | | | - Suely Pires Curti
- Núcleo de Doenças de Transmissão Vetorial, Centro de Virologia, Instituto Adolfo Lutz, São Paulo, Brazil
| | - Paula Rahal
- Laboratório de Estudos Genômicos, IBILCE-UNESP, São Paulo, Brazil
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