title: [Preparation and detection of phosphorylated PRAS40 (Ser183) polyclonal antibody].
abstract: PRAS40 (proline-rich Akt substrate 40 kD) associates with mammalian target of rapamycin complex 1(mTORC1), serine 183 site (Ser183) of PRAS40 can be phosphorylated by mTORC1. To prepare the phosphorylated PRAS40 (Ser183) antibody, We chosen 10-amino acid including Ser183 as antigen peptide through antigenicity and hydrophobicity analysis, hinged on keyhole limpet hemocyanin (KLH), and used the KLH-peptide to immunize rabbits. After antibody serum titer detection by enzyme linked immunosorbent assay (ELISA), the antibody was purified with rProtein A sepharose fast flow and dephosphorylated antigen membrane. The antibody titrate reached 1:10 000 after purification and its special property was enhanced with absorption treatment of dephosphorylated antigen membrane. In addition, we used rabbit anti-PRAS40 antibody and the phosphorylated PRAS40 (Ser183) antibody to detect PRAS40 expression in several cell lines, including the normal cells HL7702, HEK293, tumor cells HepG2, A549 and S180. There were no quite difference among these cells; otherwise, we observed the decreased phosphorylation level of Ser183 after amino acid withdrawal treatment. Therefore, the polyclonal phosphorylated PRAS40 (Ser183) antibody was specific to PRAS40 (Ser183) site and could be used for the function study of PRAS40.
authors.affiliation: School of Life Science, Anhui University, Hefei 230039, China.
authors.forename: Hao
authors.initials: H
authors.lastname: Wei
authors.forename: Bei
authors.initials: B
authors.lastname: Huang
authors.forename: Changzhi
authors.initials: C
authors.lastname: Xu
authors.forename: Zhuxia
authors.initials: Z
authors.lastname: Zheng
authors.forename: Yu
authors.initials: Y
authors.lastname: Bai
mesh_terms: D048868:Adaptor Proteins, Signal Transducing; D000818:Animals; D000906:Antibodies / Q000032:analysis*; D045744:Cell Line, Tumor; D006801:Humans; D008297:Male; D000076222:Mechanistic Target of Rapamycin Complex 1; D046912:Multiprotein Complexes; D010750:Phosphoproteins / Q000737:chemistry / Q000276:immunology*; D011506:Proteins / Q000235:genetics / Q000378:metabolism*; D051057:Proto-Oncogene Proteins c-akt / Q000378:metabolism; D011817:Rabbits; D012694:Serine / Q000378:metabolism*; D058570:TOR Serine-Threonine Kinases
chemical_list: C484523:AKT1S1 protein, human; D048868:Adaptor Proteins, Signal Transducing; D000906:Antibodies; D046912:Multiprotein Complexes; D010750:Phosphoproteins; D011506:Proteins; D012694:Serine; D000076222:Mechanistic Target of Rapamycin Complex 1; D051057:Proto-Oncogene Proteins c-akt; D058570:TOR Serine-Threonine Kinases