Practice question

Tobacco Etch Virus protease exhibits stringent specificity for seven amino acid consensus motif Glu-Asn-Leu-Tyr-Phe-Gln-Gly or Ser, cleaving between glutamine and glycine or serine residues. This extended recognition ensures minimal off-target cleavage within mammalian proteins, making it ideal for selective release of protein complexes during Tandem Affinity Purification. Recognition sequence is incorporated between two affinity tags in TAP construct. ATG represents translation initiation codon, calmodulin site binds calcium-dependent calmodulin, and Protein A motif binds immunoglobulin. Seven-residue specificity underlies its utility as biotechnological tool for precise proteolysis.