کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2432779 1106804 2010 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
cDNA cloning of the immunoglobulin heavy chain genes in banded houndshark Triakis scyllium
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم آبزیان
پیش نمایش صفحه اول مقاله
cDNA cloning of the immunoglobulin heavy chain genes in banded houndshark Triakis scyllium
چکیده انگلیسی

In this study, cDNAs encoding the secreted forms of the immunoglobulin (Ig) heavy chains of IgM, IgNAR, and IgW were cloned from the banded houndshark Triakis scyllium. Two clones for the IgM heavy chains encoded 569 and 570 amino acids, whose conserved (C) region showed 47–70% amino acid identities to those reported in other cartilaginous fish. Four clones for the IgNAR encoded 673–670 amino acids with conserved Ig-superfamily domains. The IgNAR C region showed 56–69% amino acid identities to those so far reported. High-throughput sequencing revealed that in most of the IgNAR sequences, the two variable regions (CDR1 and CDR3) each possess a cysteine residue. Three types of IgW were identified; one contained Ig-superfamily domains that are in other cartilaginous fish, one lacks the 3rd domain in the constant region, and one lacks the 3rd to 5th domains. Despite these differences, the IgW isoforms clustered with IgWs of other cartilaginous fishes and the C regions showed 47–89% amino acid identities. mRNAs for IgM and IgNAR were detected in various tissues, while IgW mRNA was mainly detected in pancreas. The banded hounded shark also has IgM, IgW and IgNAR as well as the other cartilaginous fish with unique IgW isoform.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fish & Shellfish Immunology - Volume 29, Issue 5, November 2010, Pages 854–861
نویسندگان
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