title: [Molecular cloning, protein expression and preparation of polyclonal antibody of ficolin-A].
abstract: OBJECTIVE
  To clone mouse ficolin-A cDNA, construct eukaryotic and prokaryotic expression vectors and prepare polyclonal antibody of ficolin-A.
  
  
  METHODS
  Full length of the ficolin-A cDNA fragment from the liver of newly born C57BL/6 mouse was amplified by RT-PCR by the use of GeneRacer kit. Then it was cloned into the eukaryotic vector pVAX-1 and prokaryotic vector pGEX-KG and expressed as a fusion protein in E.coli BL21 induced by IPTG. The expressed GST-ficolin-A fusion protein was purified via GST-Sepharose 4B Column and identified by SDS-PAGE and Western blot. The antibody against ficolin-A was prepared and its titer was identified.
  
  
  RESULTS
  The recombinant eukaryotic vector pVAX-1-ficolin-A and prokaryotic expression vector pGEX-KG-ficolin-A were successfully constructed. The recombinant GST-ficolin-A protein was overexpressed in E.coli. The relative molecular mass (M(r)) of the expressed product was identical with the predicted value. The antibody was prepared successfully.
  
  
  CONCLUSIONS
  We have successfully got the constructions of the recombinant eukaryotic vector pVAX-1-ficolin-A, prokaryotic expression vector pGEX-KG-ficolin-A and the purified recombinant ficolin-A protein in E.coli BL21. These will be helpful for the further investigation of the biological function of ficolin-A.
authors.affiliation: Department of Immunology, Hubei Province Key Laboratory of Allergy and Immunology, State Key Laboratory of Virology, Wuhan University School of Medicine, Wuhan 430071, China.
authors.forename: Jing
authors.initials: J
authors.lastname: Zhou
authors.forename: Ping
authors.initials: P
authors.lastname: Sun
authors.forename: Xiao-lian
authors.initials: XL
authors.lastname: Zhang
mesh_terms: D000818:Animals; D000906:Antibodies / Q000276:immunology*; D003001:Cloning, Molecular; D004926:Escherichia coli / Q000235:genetics / Q000378:metabolism; D005260:Female; D015870:Gene Expression; D037102:Lectins / Q000235:genetics* / Q000276:immunology* / Q000302:isolation & purification / Q000378:metabolism; D051379:Mice; D008810:Mice, Inbred C57BL; D011817:Rabbits; D011993:Recombinant Fusion Proteins / Q000235:genetics / Q000276:immunology / Q000302:isolation & purification / Q000378:metabolism; D000097604:Ficolins
chemical_list: D000906:Antibodies; D037102:Lectins; D011993:Recombinant Fusion Proteins; D000097604:Ficolins