A preparative purification process for recombinant hepatitis B core antigen using online capture by expanded bed adsorption followed by size-exclusion chromatography.
Hepatitis B core antigen (HBcAg) is an important serological marker used in the diagnosis of hepatitis B virus (HBV) infections. In the current study, a fast and efficient preparative purification protocol for truncated HBcAg from Escherichia coli disruptate was developed. The recombinant HBcAg was first captured by anion exchange expanded bed adsorption chromatography integrated with a cell disruption process. This online capture process has shortened the process time and eliminated the "hold-up" period that may be detrimental to the quality of target protein. The eluted product from the expanded bed adsorption chromatography was subsequently purified using size-exclusion chromatography. The results showed that this novel purification protocol achieved a recovery yield of 45.1% with a product purity of 88.2%, which corresponds to a purification factor of 4.5. The recovered HBcAg is still biologically active as shown by ELISA test.
Ho
Chin Woi
CW
Department of Chemical and Environmental Engineering, Universiti Putra Malaysia, Malaysia.
Tan
Wen Siang
WS
Chong
Fui Chin
FC
Ling
Tau Chuan
TC
Tey
Beng Ti
BT
D000327:Adsorption; D002850:Chromatography, Gel / Q000379:methods*; D002852:Chromatography, Ion Exchange / Q000379:methods*; D004591:Electrophoresis, Polyacrylamide Gel; D004797:Enzyme-Linked Immunosorbent Assay; D004926:Escherichia coli / Q000235:genetics; D006512:Hepatitis B Core Antigens / Q000235:genetics / Q000302:isolation & purification* / Q000378:metabolism; D011994:Recombinant Proteins / Q000235:genetics / Q000302:isolation & purification / Q000378:metabolism
D006512:Hepatitis B Core Antigens; D011994:Recombinant Proteins