期刊
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
卷 23, 期 2, 页码 -出版社
MDPI
DOI: 10.3390/ijms23020698
关键词
antimicrobial activity; bacterial binding assay; C-type lectin; Pacific abalone; perlucin
资金
- Ministry of Agriculture, Food and Rural Affairs (MAFRA)
- Ministry of Oceans and Fisheries (MOF)
- Rural Development Administration (RDA)
- Korea Forest Service (KFS) [213008-05-4-SB710]
- LED-Marine Technology Convergence R&D Center - Ministry of Ocean and Fisheries, Korea
This study identified a gene that influences the growth of Pacific abalone and found that it plays an important role in the host defense mechanism. The protein encoded by this gene was also found to exhibit antimicrobial activity against various bacteria.
Genes that influence the growth of Pacific abalone (Haliotis discus hannai) may improve the productivity of the aquaculture industry. Previous research demonstrated that the differential expression of a gene encoding a C-type lectin domain-containing protein (CTLD) was associated with a faster growth in Pacific abalone. We analyzed this gene and identified an open reading frame that consisted of 145 amino acids. The sequence showed a significant homology to other genes that encode CTLDs in the genus Haliotis. Expression profiling analysis at different developmental stages and from various tissues showed that the gene was first expressed at approximately 50 days after fertilization (shell length of 2.47 +/- 0.13 mm). In adult Pacific abalone, the gene was strongly expressed in the epipodium, gill, and mantle. Recombinant Pacific abalone CTLD purified from Escherichia coli exhibited antimicrobial activity against several Gram-positive bacteria (Bacillus subtilis, Streptococcus iniae, and Lactococcus garvieae) and Gram-negative bacteria (Vibrio alginolyticus and Vibrio harveyi). We also performed bacterial agglutination assays in the presence of Ca2+, as well as bacterial binding assays in the presence of the detergent dodecyl maltoside. Incubation with E. coli and B. subtilis cells suggested that the CTLD stimulated Ca2+-dependent bacterial agglutination. Our results suggest that this novel Pacific abalone CTLD is important for the pathogen recognition in the gastropod host defense mechanism.
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