This domain is found at the C termini of severalPenicillin-binding proteins and bacterial serine/threoninekinases [1]. It binds the beta-lactam stem, which implicates itin sensing D-alanyl-D-alanine - the PBP transpeptidasesubstrate. It is a small globular fold consisting of 3beta-sheets and an alpha-helix. The name PASTA is derived fromPBP and Serine/Threonine kinase Associated domain. PASTA domain PASTA