Characterization and functional analysis of serpin-1 like gene from oak silkworm Antheraea pernyi

Serpins are a broadly distributed family of proteases found in various organisms that play an important role in regulating the immune response. Here, we identified a serpin-1 gene from Antheraea pernyi that encodes a 279 amino acid protein with a molecular weight of 30.8 kDa. We expressed the recomb...

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Veröffentlicht in:Bulletin of entomological research 2017-10, Vol.107 (5), p.620-626
Hauptverfasser: Yu, H.M., Zhu, B.J., Sun, Y., Wei, G.Q., Wang, L., Qian, C., Nadeem Abbas, M., Liu, C.L.
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container_end_page 626
container_issue 5
container_start_page 620
container_title Bulletin of entomological research
container_volume 107
creator Yu, H.M.
Zhu, B.J.
Sun, Y.
Wei, G.Q.
Wang, L.
Qian, C.
Nadeem Abbas, M.
Liu, C.L.
description Serpins are a broadly distributed family of proteases found in various organisms that play an important role in regulating the immune response. Here, we identified a serpin-1 gene from Antheraea pernyi that encodes a 279 amino acid protein with a molecular weight of 30.8 kDa. We expressed the recombinant Ap-serpin-1 protein in Escherichia coli and used the purified protein to prepare rabbit anti-Ap-serpin-1 polyclonal antibodies. We calculated the enzyme-linked immunosorbent assay titer of the antibody as 1:128000. Quantitative real-time polymerase chain reaction analysis revealed that Ap-serpin-1 was expressed in all examined tissues, including hemolymph, malpighian tubules, midgut, silk gland, integument and the fat body; the highest Ap-serpin-1 expression levels was detected in the fat body. We next investigated the expression patterns of Ap-serpin-1 in both fat body and hemolymph samples, following treatment with E. coli, Beauveria bassiana, Micrococcus luteus and nuclear polyhedrosis virus (NPV). We reported that NPV and M. luteus significantly enhanced Ap-serpin-1 expression in the fat body. While, in the hemolymph samples, treatment with B. bassiana and M. luteus was shown to upregulate Ap-serpin-1 expression at 24 h induction. Altogether, our results suggest that Ap-serpin-1 is involved in the innate immunity of A. pernyi.
doi_str_mv 10.1017/S000748531700013X
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Here, we identified a serpin-1 gene from Antheraea pernyi that encodes a 279 amino acid protein with a molecular weight of 30.8 kDa. We expressed the recombinant Ap-serpin-1 protein in Escherichia coli and used the purified protein to prepare rabbit anti-Ap-serpin-1 polyclonal antibodies. We calculated the enzyme-linked immunosorbent assay titer of the antibody as 1:128000. Quantitative real-time polymerase chain reaction analysis revealed that Ap-serpin-1 was expressed in all examined tissues, including hemolymph, malpighian tubules, midgut, silk gland, integument and the fat body; the highest Ap-serpin-1 expression levels was detected in the fat body. We next investigated the expression patterns of Ap-serpin-1 in both fat body and hemolymph samples, following treatment with E. coli, Beauveria bassiana, Micrococcus luteus and nuclear polyhedrosis virus (NPV). We reported that NPV and M. luteus significantly enhanced Ap-serpin-1 expression in the fat body. While, in the hemolymph samples, treatment with B. bassiana and M. luteus was shown to upregulate Ap-serpin-1 expression at 24 h induction. 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Entomol. Res</addtitle><description>Serpins are a broadly distributed family of proteases found in various organisms that play an important role in regulating the immune response. Here, we identified a serpin-1 gene from Antheraea pernyi that encodes a 279 amino acid protein with a molecular weight of 30.8 kDa. We expressed the recombinant Ap-serpin-1 protein in Escherichia coli and used the purified protein to prepare rabbit anti-Ap-serpin-1 polyclonal antibodies. We calculated the enzyme-linked immunosorbent assay titer of the antibody as 1:128000. Quantitative real-time polymerase chain reaction analysis revealed that Ap-serpin-1 was expressed in all examined tissues, including hemolymph, malpighian tubules, midgut, silk gland, integument and the fat body; the highest Ap-serpin-1 expression levels was detected in the fat body. We next investigated the expression patterns of Ap-serpin-1 in both fat body and hemolymph samples, following treatment with E. coli, Beauveria bassiana, Micrococcus luteus and nuclear polyhedrosis virus (NPV). We reported that NPV and M. luteus significantly enhanced Ap-serpin-1 expression in the fat body. While, in the hemolymph samples, treatment with B. bassiana and M. luteus was shown to upregulate Ap-serpin-1 expression at 24 h induction. Altogether, our results suggest that Ap-serpin-1 is involved in the innate immunity of A. pernyi.</description><subject>Amino acids</subject><subject>Animals</subject><subject>Antibodies</subject><subject>Beauveria bassiana</subject><subject>Biochemistry</subject><subject>Cloning</subject><subject>Defence mechanisms</subject><subject>E coli</subject><subject>ELISA</subject><subject>Enzyme-linked immunosorbent assay</subject><subject>Enzymes</subject><subject>Escherichia coli</subject><subject>Fat body</subject><subject>Fat Body - metabolism</subject><subject>Functional analysis</subject><subject>Genes</subject><subject>Genomes</subject><subject>Hemolymph</subject><subject>Hemolymph - metabolism</subject><subject>Immune response</subject><subject>Immune system</subject><subject>Immunity</subject><subject>Innate immunity</subject><subject>Insect Proteins - genetics</subject><subject>Insect Proteins - isolation &amp; purification</subject><subject>Insect Proteins - metabolism</subject><subject>Integument</subject><subject>Life Cycle Stages</subject><subject>Male</subject><subject>Malpighian tubules</subject><subject>Microorganisms</subject><subject>Midgut</subject><subject>Molecular biology</subject><subject>Molecular weight</subject><subject>Moths - physiology</subject><subject>Nucleotide sequence</subject><subject>Oak</subject><subject>PCR</subject><subject>Physiology</subject><subject>Polyclonal antibodies</subject><subject>Polymerase chain reaction</subject><subject>Proteins</subject><subject>Rabbits</subject><subject>Recombinants</subject><subject>Research Papers</subject><subject>Serine proteinase inhibitors</subject><subject>Serpins - genetics</subject><subject>Serpins - isolation &amp; 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Entomol. Res</addtitle><date>2017-10-01</date><risdate>2017</risdate><volume>107</volume><issue>5</issue><spage>620</spage><epage>626</epage><pages>620-626</pages><issn>0007-4853</issn><eissn>1475-2670</eissn><abstract>Serpins are a broadly distributed family of proteases found in various organisms that play an important role in regulating the immune response. Here, we identified a serpin-1 gene from Antheraea pernyi that encodes a 279 amino acid protein with a molecular weight of 30.8 kDa. We expressed the recombinant Ap-serpin-1 protein in Escherichia coli and used the purified protein to prepare rabbit anti-Ap-serpin-1 polyclonal antibodies. We calculated the enzyme-linked immunosorbent assay titer of the antibody as 1:128000. Quantitative real-time polymerase chain reaction analysis revealed that Ap-serpin-1 was expressed in all examined tissues, including hemolymph, malpighian tubules, midgut, silk gland, integument and the fat body; the highest Ap-serpin-1 expression levels was detected in the fat body. We next investigated the expression patterns of Ap-serpin-1 in both fat body and hemolymph samples, following treatment with E. coli, Beauveria bassiana, Micrococcus luteus and nuclear polyhedrosis virus (NPV). We reported that NPV and M. luteus significantly enhanced Ap-serpin-1 expression in the fat body. While, in the hemolymph samples, treatment with B. bassiana and M. luteus was shown to upregulate Ap-serpin-1 expression at 24 h induction. Altogether, our results suggest that Ap-serpin-1 is involved in the innate immunity of A. pernyi.</abstract><cop>Cambridge, UK</cop><pub>Cambridge University Press</pub><pmid>28228181</pmid><doi>10.1017/S000748531700013X</doi><tpages>7</tpages></addata></record>
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subjects Amino acids
Animals
Antibodies
Beauveria bassiana
Biochemistry
Cloning
Defence mechanisms
E coli
ELISA
Enzyme-linked immunosorbent assay
Enzymes
Escherichia coli
Fat body
Fat Body - metabolism
Functional analysis
Genes
Genomes
Hemolymph
Hemolymph - metabolism
Immune response
Immune system
Immunity
Innate immunity
Insect Proteins - genetics
Insect Proteins - isolation & purification
Insect Proteins - metabolism
Integument
Life Cycle Stages
Male
Malpighian tubules
Microorganisms
Midgut
Molecular biology
Molecular weight
Moths - physiology
Nucleotide sequence
Oak
PCR
Physiology
Polyclonal antibodies
Polymerase chain reaction
Proteins
Rabbits
Recombinants
Research Papers
Serine proteinase inhibitors
Serpins - genetics
Serpins - isolation & purification
Serpins - metabolism
Silk
Silk gland
Tissue
Viruses
title Characterization and functional analysis of serpin-1 like gene from oak silkworm Antheraea pernyi
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