Novel C‐type lectin from razor clam Sinonovacula constricta agglutinates bacteria and erythrocytes in a Ca2+‐dependent manner

Abstract Among its other physiological roles, C‐type lectins functioned as pattern recognition receptors (PRR) in innate immunity received much attention. In the present study, a novel C‐type lectin was identified and characterized from the invertebrate razor clam Sinonovacula constrict and designated as ScCTL. The complete cDNA sequence of ScCTL was 828 bp in length and coded a secreted polypeptide of 158 amino acids with a typical CRD domain. Multiple sequence alignments combined with phylogenetic analysis both collectively confirmed that ScCTL was a novel member belong to lectin family. Spatial expression distribution analysis revealed that ScCTL was extensively expressed in all of the examined tissues, and the highest expression was detected in the hepatopancreas. After 1 × 107 CFU/mL Vibrio parahaemolyticus challenge by immersion infection, the ScCTL transcript in hepatopancreas and gill were markedly upregulated and arrived the maximum levels at 24 or 12 h after challenge, respectively. Recombinant ScCTL could agglutinate not only all tested bacteria but sheep and mouse erythrocyte in the presence of Ca2+. All of our studies suggested that ScCTL performed important roles in protecting cells from pathogenic infection in S. constrict. HighlightsA novel C‐type lectin ScCTL was cloned from razor clam Sinonovacula constricta.ScCTL was constitutively expressed in all of the examined tissues with the highest magnitude observed in the hepatopancreas.Vibrio parahaemolyticus could significantly up‐regulate the expressions of ScCTL in hepatopancreas and gill tissues.Recombinant ScCTL can agglutinate not only all tested bacteria but sheep and mouse erythrocyte in the presence of Ca2+.

• Publication year

  2018

• Venue

  Developmental and Comparative Immunology

• Publication date

  2018-04-22

• Fields of study

  Biology, Medicine, Chemistry

• Identifiers
  DOI 10.1016/j.dci.2018.04.016PMID 29723812
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar, PubMed

• No claims are published for this paper.

• No concepts are published for this paper.

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