Volume 31 Issue 6
Nov.  2010
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ZHANG Ying, JIN Shan, ZHAO Qing-Song, WANG Guo-Liang, YU Kai, WANG Chun-Lin. Cloning and expression pattern analysis of a lipopolysaccharide -and β-1,3-glucan-binding protein in Portunus trituberculatus. Zoological Research, 2010, 31(6): 587-594. doi: 10.3724/SP.J.1141.2010.06587
Citation: ZHANG Ying, JIN Shan, ZHAO Qing-Song, WANG Guo-Liang, YU Kai, WANG Chun-Lin. Cloning and expression pattern analysis of a lipopolysaccharide -and β-1,3-glucan-binding protein in Portunus trituberculatus. Zoological Research, 2010, 31(6): 587-594. doi: 10.3724/SP.J.1141.2010.06587

Cloning and expression pattern analysis of a lipopolysaccharide -and β-1,3-glucan-binding protein in Portunus trituberculatus

doi: 10.3724/SP.J.1141.2010.06587
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  • Author Bio:

    ZHANG Ying

  • Corresponding author: JIN Shan
  • Received Date: 2010-03-09
  • Rev Recd Date: 2010-09-16
  • Publish Date: 2010-12-22
  • The lipopolysaccharide -and β-1,3-glucan-binding protein (LGBP) is apattern recognition receptor, which is fundamental for the innate immune response of crustaceans. A LGBP gene was cloned from the haemocytes of Portunus trituberculatus using SMART RACE methods. The full-length LGBP cDNA (1 378 bp) had a 1 095 bp open reading frame encoding a protein of 365 amino acid residues including a 16 amino acid residues signal peptide, a 138 bp 5' untranslated region (UTR) and a 144 bp untranslated region in the 3' UTR with a 29 bp polyA tail. The calculated molecular mass of the mature protein (349 amino acid residues) is 39,825.24 with an estimated pI of 4.49. The gene sequence and secondary structure of LGBP were analyzed by bio-informatics. Additionally, a Glycohydro16 domain was identified. The expression of P. trituberculatus in varioustissues were detected through RT-PCR methods. The results showed that the LGBP gene expressed in all the tissues detected, including haemocytes, hepatopancreas, heart, gills and muscle. In response to the challenge of Staphyloccocus aureus and Vibrio alginolyticus, the LGBP gene expression in haemocytesof the group challenged with mixed bacteria were higher than the control group within 48 h. It suggested that the LGBP gene plays an active role in immunologic processagainsting bacterial infection.
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