Application of nickel (II) thermo-responsive affinity polymer to porcine circovirus type 2 (PCV2) cap protein purification and interaction analysis by X-ray photoelectron spectroscopy (XPS). (June 2018)

• Record Type: Journal Article
• Authors: Li, Sipeng; Liu, Jifu; Ding, Zhaoyang; Cao, Xuejun
• Is Part Of: Process biochemistry. Volume 69(2018)
• Page Start: 216
• Page End: 223
• Publication Date: 2018-06
• Subjects: PCV2 Porcine Circovirus Type 2 -- XPS X-Ray Photoelectron Spectroscopy; Porcine circovirus type II capsid protein -- Affinity precipitation -- Thermo-responsive -- X-ray photoelectron spectroscopy; Biochemical engineering -- Periodicals; Biotechnology -- Periodicals; Biochemistry -- periodicals; Biotechnology -- periodicals; Chemical Engineering -- periodicals; Génie biochimique -- Périodiques; Biotechnologie -- Périodiques; Biochemical engineering; Biotechnology; Periodicals; 660.63
• DOI: 10.1016/j.procbio.2018.03.007
• Languages: English
• ISSNs: 1359-5113

Abstract

Graphical abstract: Highlights: Affinity precipitation was applied in purification of PCV2 Cap proteins. A thermo-response polymer (PNDBN ) with nickel ions was prepared. The electrophoresis pure PCV2 Cap proteins could be obtained. Interaction between nickel and protein was studied by XPS. Abstract: The vaccine against porcine circovirus type II (PCV2) is mainly composed of virus capsid proteins. An efficient separation method of PCV2 Cap protein has not been developed. Affinity precipitation methods with high selectivity and recoverability based on the thermo-responsive affinity polymer (PNDBN -Ni) were introduced to separate the PCV2 Cap protein. When the temperature was above the polymer LCST (36.1 °C), PNDBN -Ni could be precipitated with a recovery of above 95.00%. The affinity ligand immobilized on the polymer could specifically bind the proteins. The optimal conditions for affinity precipitation were a pH of 6.0 with a ligand density of 56.22 μmol/g polymer at 25.0 °C. The final results were detected by electrophoresis. The interactions between proteins and ligands were determined by the change in ligand state as seen using X-ray photoelectron spectra (XPS).