Isolation of a peptide ligand for affinity purification of factor VIII using phage display.
Polypeptides for use in affinity chromatography of factor VIII were identified using phage display technology. Phage libraries were designed to express polypeptide fusions containing five to seven residues flanked by two cysteines that form a disulfide bond. Individual bacteriophage were selected for the ability of these polypeptides to bind factor VIII, and then release the protein under mild elution conditions. Strong consensus sequences were observed that appear to be necessary for this reversible interaction. Chemically synthesized ligands identified by this screening were immobilized onto a chromatographic support and used for affinity purification of factor VIII from a complex feedstream. A chromatographic step was developed that provided a 10000-fold reduction in host cell proteins and DNA, while providing exceptional product recovery.
Kelley
Brian D
BD
Wyeth BioPharma, 1 Burtt Road, Andover, MA 01810, USA. bkelley@wyeth.com
Booth
James
J
Tannatt
Molly
M
Wub
Qi-Long
QL
Ladner
Robert
R
Yuc
Jinan
J
Potter
Daniel
D
Ley
Arthur
A
D001435:Bacteriophages / Q000235:genetics*; D002846:Chromatography, Affinity / Q000379:methods*; D005169:Factor VIII / Q000235:genetics / Q000302:isolation & purification*; D010455:Peptides / Q000737:chemistry*
D010455:Peptides; D005169:Factor VIII