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A zebrafish intelectin ortholog agglutinates both Gram-negative and Gram-positive bacteria with binding capacity to bacterial polysaccharide

文献类型： 外文期刊

作者： Chen, Lei 1 ; Yan, Jie 1 ; Sun, Weiping 1 ; Zhang, Yan 1 ; Sui, Chao 2 ; Qi, Jing 2 ; Du, Yijun 3 ; Feng, Lijun 1 ;

作者机构： 1.Shandong Univ, Shandong Prov Key Lab Anim Cells & Dev Biol, Marine Biotechnol Res Ctr, Inst Dev Biol,Sch Life Sci, Jinan 250100, Shandong, Peoples R China

2.Shandong Acad Agr Sci, Shandong Key Lab Anim Dis Control & Breeding, Inst Anim Sci & Vet Med, Jinan, Peoples R China

3.Shandong

关键词： Innate immunity;Zebrafish intelectin;LPS/PGN;Bacterial agglutination

期刊名称：FISH & SHELLFISH IMMUNOLOGY （ 影响因子：4.581； 五年影响因子：4.851 ）

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收录情况： SCI

摘要： Intelectins are glycan-binding lectins found in various species including cephalochordates, urochordates, fish, amphibians and mammals. But their detailed functions are not well studied in zebrafish which is a good model to study native immunity. In this study, we cloned a zebrafish intelectin ortholog, zebrafish intelectin 2 (zITLN2), which contains a conserved fibrinogen-related domain (FReD) in the N-terminus and the unique intelectin domain in the C-terminus. We examined the tissue distribution of zITLN2 in adult zebrafish and found that zITLN2 was expressed in various organs with the highest level in intestine. Like amphioxus intelectins, zITLN2 expression was upregulated in adult zebrafish infected with Staphylococcus aureus with the highest expression level at 12 h after challenge. Recombinant zITLN2 protein expressed in E. coli was able to agglutinate both Gram-negative and Gram-positive bacteria to similar degrees in a calcium-dependent manner. Furthermore, recombinant zITLN2 bound lipopolysaccharide (LPS) and peptidoglycan (PGN) comparably.

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