US Patent:
20140080180, Mar 20, 2014
Inventors:
Richard St. John - Millbrae CA, US
Jane V. Gunson - Redwood City CA, US
Kim Kaleas - San Mateo CA, US
Deepa Nadarajah - San Mateo CA, US
Rachel Adams - Guelph, CA
Bradley R. Snedecor - Portola Valley CA, US
Assignee:
GENENTECH, INC. - South San Francisco CA
International Classification:
C12P 21/00
C07K 16/00
Abstract:
The present invention contemplates methods of producing a recombinant protein comprising fermenting a prokaryotic host cell wherein said prokaryotic host cell has been transformed with a nucleic acid encoding said recombinant protein, harvesting said recombinant protein under conditions where dOlevels are greater than 0%, purifying said recombinant protein to a filtered bulk, wherein said filtered bulk does not contain detectable DHNA-recombinant protein adduct, as measured by an IEC assay at 310 nm. Furthermore, method of producing a recombinant protein comprising fermenting a menE gene-deleted prokaryotic host cell wherein said prokaryotic host cell has been transformed with a nucleic acid encoding said recombinant protein, harvesting said recombinant protein, purifying said recombinant protein to a filtered bulk, wherein said filtered bulk does not contain detectable DHNA-recombinant protein adduct, as measured by an IEC assay at 310 nm, wherein the recombinant protein yield is increased by about 20% or greater is contemplated.