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大鼠 Prealbumin/Transthyretin 基因ORF全长cDNA克隆(表达载体), N-Myc 标签

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    大鼠 TTR cDNA Clone产品信息
    NCBI注册码:AF479660.1
    参考序列ORF长度:444bp
    cDNA基因描述:Full length Clone DNA of Rattus norvegicus transthyretin with N terminal Myc tag.
    分子别称:Lr1, Tbpa
    分子种属:Rat
    载体:pCMV3-SP-N-Myc
    质粒:
    限制性酶切位点:
    Tag序列:Myc Tag Sequence: GAGCAGAAACTCATCTCAGAAGAGGATCTG
    序列信息:
    测序引物:T7(TAATACGACTCACTATAGGG) BGH(TAGAAGGCACAGTCGAGG)
    ( We provide with TTR qPCR primers for gene expression analysis, RP300692 )
    启动子:Enhanced CMV mammalian cell promoter
    Application:Stable or Transient mammalian expression
    抗生素(大肠杆菌):Kanamycin
    抗生素(哺乳动物细胞):Hygromycin
    运输方式:Each tube contains lyophilized plasmid.
    储存方法:The lyophilized plasmid can be stored at room temperature for three months.
    Myc Tag Info

    A myc tag can be used in many different assays that require recognition by an antibody. If there is no antibody against the studied protein, adding a myc-tag allows one to follow the protein with an antibody against the Myc epitope. Examples are cellular localization studies by immunofluorescence or detection by Western blotting.

    The peptide sequence of the myc-tag is: N-EQKLISEEDL-C (1202 Da). It can be fused to the C-terminus and the N-terminus of a protein. It is advisable not to fuse the tag directly behind the signal peptide of a secretory protein, since it can interfere with translocation into the secretory pathway.

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    研究背景

    Prealbumin/Transthyretin, also known as ATTR, Prealbumin, TTR and PALB, is a secreted and cytoplasm protein which belongs to the Prealbumin / Transthyretin family. Prealbumin / Transthyretin is detected in serum and cerebrospinal fluid (at protein level). It is highly expressed in choroid plexus epithelial cells. It is also detected in retina pigment epithelium and liver. Each monomer of Prealbumin / Transthyretin has two 4-stranded beta sheets and the shape of a prolate ellipsoid. Antiparallel beta-sheet interactions link monomers into dimers. A short loop from each monomer forms the main dimer-dimer interaction. These two pairs of loops separate the opposed, convex beta-sheets of the dimers to form an internal channel. Prealbumin/Transthyretin is a carrier protein. It transports thyroid hormones in the plasma and cerebrospinal fluid, and also transports retinol (vitamin A) in the plasma. Defects in Prealbumin / Transthyretin are the cause of amyloidosis type 1 (AMYL1) which is a hereditary generalized amyloidosis due to Prealbumin / Transthyretin amyloid deposition. Protein fibrils can form in different tissues leading to amyloid polyneuropathies, amyloidotic cardiomyopathy, carpal tunnel syndrome, systemic senile amyloidosis. The diseases caused by mutations include amyloidotic polyneuropathy, euthyroid hyperthyroxinaemia, amyloidotic vitreous opacities, cardiomyopathy, oculoleptomeningeal amyloidosis, meningocerebrovascular amyloidosis, carpal tunnel syndrome, etc.

    参考资料
  • Westermark P, et al. (1990) Fibril in senile systemic amyloidosis is derived from normal transthyretin. Proc Natl Acad Sci U S A. 87(7): 2843-5.
  • Colon W, et al. (1992) Partial denaturation of transthyretin is sufficient for amyloid fibril formation in vitro. Biochemistry. 31(36): 8654-60.
  • Hammarstrm P, et al. (2003) Prevention of transthyretin amyloid disease by changing protein misfolding energetics. Science. 299(5607): 713-6.
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