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人 PSME2 / PA28b 基因ORF全长cDNA克隆(表达载体), N-Myc 标签

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 PSME2 cDNA Clone产品信息
NCBI注册码:BC004368
参考序列ORF长度:720bp
cDNA基因描述:Full length Clone DNA of Homo sapiens proteasome (prosome, macropain) activator subunit 2 (PA28 beta) with N terminal Myc tag.
分子别称:PA28B, REGbeta, PA28beta
分子种属:Human
载体:pCMV3-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 PSME2 qPCR primers for gene expression analysis, HP103274 )
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 is a polypeptide protein tag derived from the c-myc gene product that can be added to a protein using recombinant DNA technology. It can be used for affinity chromatography, then used to separate recombinant, overexpressed protein from wild type protein expressed by the host organism. It can also be used in the isolation of protein complexes with multiple subunits.

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

PSME2, also known as PA28b, is a subunit of proteasome. The 26S proteasome multicatalytic proteinase complex has a highly ordered structure composed of 2 complexes, a 20S core and a 19S regulator. The 20S core is composed of 4 rings of 28 non-identical subunits; 2 rings are composed of 7 alpha subunits and 2 rings are composed of 7 beta subunits. The 19S regulator is composed of a base, which contains 6 ATPase subunits and 2 non-ATPase subunits, and a lid, which contains up to 10 non-ATPase subunits. Proteasomes are distributed throughout eukaryotic cells at a high concentration and cleave peptides in an ATP/ubiquitin-dependent process in a non-lysosomal pathway. An essential function of a modified proteasome, the immunoproteasome, is the processing of class I MHC peptides. The immunoproteasome contains an alternate regulator, referred to as the 11S regulator or PA28, that replaces the 19S regulator. Three subunits (alpha, beta and gamma) of the 11S regulator have been identified. PSME2 gene encodes the beta subunit of the 11S regulator, one of the two 11S subunits that is induced by gamma-interferon. Three beta and three alpha subunits combine to form a heterohexameric ring.

参考资料
  • Ahn K. et al., 1996, J Biol Chem. 271 (30): 18237-42.
  • Rual Jean-François. et al., 2005, Nature. 437 (7062): 1173-8.
  • Ahn JY. et al., 1995, FEBS Lett. 366 (1): 37-42.
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    货号: HG14640-NM
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