Objective To build a
foundation for
determination of C reaction
protein,C reaction
protein was expressed and purified,and the immune reactivity of the purified
protein was identified.
Methods The CRP
cDNA was amplified by RT-PCR from
human liver cDNA library and inserted into expression vector pCRTT/NT.The recombined
plasmid CRP-pCRTT/NT which expressed the fusion
protein of CRP was then transferred into lysogenic host
strain E coli.BL21 (DE3).The target
protein was identified using SDS-
polyacrylamide gel electrophoresis (
SDS-PAGE).
Affinity chromatography was used for
protein purification.The immune reactivity of purified CRP was identified by
Western blot using anti-CRP specific antibody.Results Recombiant
human CRP was expressed in
inclusion bodies of E.coli with a six
histamine tag.The purify of
recombinant protein was detected by
SDS-PAGE as a single band at 30 000 and was identified by
Western blot.Conclusions A
plasmid expressed CRP
protein is constructed and the purification system of CRP
protein is established.The immune reactivity of the purified
protein is identified by
Western blot,which makes a good base for the preparation of CRP test kit.