Including "M" and "STOP" codons in my insert - (Aug/20/2012 )
I intend to overexpress a fusion recombinant polypeptide in L. lactis, consisted of two partial proteins connected by a linker. Since the start and the stop codons are not included in this insert, I was wondering, should I design an "M" and a "STOP" codon at the beginning and end of the insert fragment, respectively?
By the way, my expression vector does not provide an "M" upstream of the insert and the stop codon of the vector actually stops at 6 amino-acids (i.e. SSSSFL) after the C-terminal of my intended fusion polypeptide.
With many thanks in advance,
Host: Lactococcus lactis strain NZ3900
From NIZO (NICE® Expression System for Lactococcus lactis)
Your construct inside the vector should be promoter-rbs-ATG-protein1-linker-protein2-stop codon-terminator in order to have the protein expressed. If the vector is missing any of these, you should insert them together with the insert construct.