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F-type lectin involved in defense against bacterial infection in the pearl oyster (Pinctada martensii)
- Source :
-
Fish & Shellfish Immunology . Feb2011, Vol. 30 Issue 2, p750-754. 5p. - Publication Year :
- 2011
-
Abstract
- 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 Cys102-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. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 10504648
- Volume :
- 30
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- Fish & Shellfish Immunology
- Publication Type :
- Academic Journal
- Accession number :
- 58102238
- Full Text :
- https://doi.org/10.1016/j.fsi.2010.12.025