Efficient biotransformation of l-lysine into cadaverine by strengthening pyridoxal 5’-phosphate-dependent proteins in Escherichia coli with cold shock treatment

•BL21 harboring pdxY under the J23100 promoter resulted in highest yield of PLP.•pdxK plays a critical role in accumulation of PLP for biotransformation.•Lysine was 100 % converted to cadaverine in co-expressing pdxK and CadA.•Cadaverine biotransformation was enhanced for in vivo and in vitro applications.•Whole-cell biocatalyst achieved the highest cadaverine productivity of 121 g/L/h.