Pathogen-driven adaptive evolution of myxovirus resistance (Mx) genes in fishes.
Biochem Genet
; 51(7-8): 626-34, 2013 Aug.
Article
em En
| MEDLINE
| ID: mdl-23644942
ABSTRACT
Myxovirus resistance (Mx) proteins, which belong to the dynamin super-family, are known to inhibit RNA viral replication in a wide range of taxonomic groups, including fishes. Given their crucial role in host immune defense, the key amino acid residues in the GTP effector domain (GED) near the C-terminus are expected to evolve adaptively in order to protect the host against invading viral pathogens. The present study reveals the role of recombination and positive selection in the evolution of Mx proteins in fishes. While the GTP-binding domain in the N-terminal domain has experienced purifying selection, several amino acid residues in GED have evolved under positive selection, thus indicating adaptive evolution. Given the antiviral activity of GED, the adaptive evolutionary changes that were observed in this region are therefore predicted to be pathogen-driven.
Texto completo:
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Base de dados:
MEDLINE
Assunto principal:
Orthomyxoviridae
/
Resistência à Doença
/
Proteínas de Resistência a Myxovirus
/
Peixes
Limite:
Animals
Idioma:
En
Revista:
Biochem Genet
Ano de publicação:
2013
Tipo de documento:
Article
País de afiliação:
Estados Unidos