F-type lectin involved in defense against bacterial infection in the pearl oyster (Pinctada martensii).
Fish Shellfish Immunol
; 30(2): 750-4, 2011 Feb.
Article
em En
| MEDLINE
| ID: mdl-21195768
ABSTRACT
In invertebrates and vertebrates, carbohydrate-binding proteins (lectins) play an important role in innate immunity against microbial invasion. In the present study, we report the cloning of an F-type lectin (designated as PmF-lectin) from pearl oyster (Pinctada martensii) using a combination of expression sequence tag (EST) analysis and rapid amplification of cDNA ends (RACE) PCR. The full-length cDNA of PmF-lectin contains an open reading frame (ORF) of 579 bp coding for192 amino acids. The deduced polypeptide possesses six conserved residues of the F-lectin family critical for the formation of disulfide bonds (Cys4³-Cys¹4³, Cys75-Cys76 and Cys¹°²-Cys¹¹9). Reverse transcription PCR (RT-PCR) and real-time quantitative PCR (qRT-PCR) analyses in adult tissues showed that the PmF-lectin mRNA was abundantly expressed in haemocytes and gill, moderately expressed in the mantle, and rarely expressed in other tissues tested. After challenge with Vibrio alginolyticus, expression of PmF-lectin mRNA in haemocytes was dramatically up-regulated, reaching the highest level (13-fold higher than that of the control group) at 3 h post challenge, and then dropped gradually. These results suggest that PmF-lectin is a member of the F-lectin family and is involved in the innate immune response in pearl oyster.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Vibrio alginolyticus
/
Pinctada
/
Lectinas
Limite:
Animals
Idioma:
En
Revista:
Fish Shellfish Immunol
Assunto da revista:
BIOLOGIA
/
MEDICINA VETERINARIA
Ano de publicação:
2011
Tipo de documento:
Article