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人 B7-H4/Vtcn1/B7S1 基因ORF全长cDNA克隆(表达载体), N-His 标签

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Human VTCN1 cDNA Clone产品信息
NCBI注册码:NM_024626.2
参考序列ORF长度:849bp
cDNA基因描述:Full length Clone DNA of Homo sapiens V-set domain containing T cell activation inhibitor 1 with N terminal His tag.
分子别称:B7X, B7H4, B7S1, B7-H4, B7h.5, VCTN1, PRO1291, FLJ22418, RP11-229A19.4, VTCN1
分子种属:Human
载体:pCMV3-SP-N-His
质粒:pCMV3-His-VTCN1
限制性酶切位点:KpnI + XbaI (6kb + 0.87kb)
Tag序列:His Tag Sequence: CACCATCACCACCATCATCACCACCATCAC
序列信息:Identical with the Gene Bank Ref. ID sequence.
测序引物:T7(TAATACGACTCACTATAGGG) BGH(TAGAAGGCACAGTCGAGG)
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.
Human VTCN1 基因质粒图
Human VTCN1 ORF mammalian expression plasmid, N-His tag
His Tag Info

A polyhistidine-tag is an amino acid motif in proteins that consists of at least five histidine (His) residues, often at the N- or C-terminus of the protein.

Polyhistidine-tags are often used for affinity purification of polyhistidine-tagged recombinant proteins expressed in Escherichia coli and other prokaryotic expression systems.

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研究背景

V-set domain-containing T-cell activation inhibitor 1, also known as B7X, B7H4, B7S1, and VTCN1, is a single-pass type? membrane protein belonging to the B7 family of costimulatory proteins. These proteins are expressed on the surface of antigen-presenting cells and interact with ligands on T lymphocytes. They provide costimulatory signals that regulate T cell responses. A soluble form of B7H4 has also been detected. B7X / VTCN1 / B7H4 negatively regulates T-cell-mediated immune response by inhibiting T-cell activation, proliferation, cytokine production and development of cytotoxicity. When expressed on the cell surface of tumor macrophages, B7X / VTCN1 / B7H4 plays an important role, together with regulatory T-cells(Treg), in the suppression of tumor-associated antigen-specific T-cell immunity. B7X / VTCN1 / B7H4 is also involved in promoting epithelial cell transformation. This membrane protein can be up-regulated by IL6 / interleukin-6 and IL10 / interleukin-10 and inhibited by CSF2 / GM-CSF and IL4 / interleukin-4 on antigen-presenting cells.

参考资料
  • Zang X, et al. (2003) B7x: a widely expressed B7 family member that inhibits T cell activation. Proc Natl Acad Sci U S A. 100(18): 10388-92.
  • Suh WK, et al. (2006) Generation and characterization of B7-H4/B7S1/B7x-deficient mice. Mol Cell Biol. 26(17): 6403-11.
  • Zang X, et al. (2007) B7-H3 and B7x are highly expressed in human prostate cancer and associated with disease spread and poor outcome. Proc Natl Acad Sci U S A. 104(49):19458-63.
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    货号: HG10738-NH
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    • Human VTCN1 ORF mammalian expression plasmid, N-His tag
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