Download MendeleyStructural investigation of the docking domain assembly from trans-AT polyketide synthases.
Son, S.Y., Bae, D.W., Kim, E., Jeong, B.G., Kim, M.Y., Youn, S.Y., Yi, S., Kim, G., Hahn, J.S., Lee, N.K., Yoon, Y.J., Cha, S.S.(2024) Structure 32: 1477-1487.e4
- PubMed: 38908377
- DOI: https://doi.org/10.1016/j.str.2024.05.017
- Primary Citation of Related Structures:
8KEM - PubMed Abstract:
Docking domains (DDs) located at the C- and N-termini of polypeptides play a crucial role in directing the assembly of polyketide synthases (PKSs), which are multienzyme complexes. Here, we determined the crystal structure of a complex comprising the C-terminal DD ( C DD MlnB ) and N-terminal DD ( N DD MlnC ) of macrolactin trans-acyltransferase (AT) PKS that were fused to a functional enzyme, AmpC EC2 β-lactamase. Interface analyses of the C DD MlnB / N DD MlnC complex revealed the molecular intricacies in the core section underpinning the precise DD assembly. Additionally, circular dichroism and steady-state kinetics demonstrated that the formation of the C DD MlnB / N DD MlnC complex had no influence on the structural and functional fidelity of the fusion partner, AmpC EC2. This inspired us to apply the C DD MlnB / N DD MlnC assembly to metabolon engineering. Indeed, DD assembly induced the formation of a complex between 4-coumarate-CoA ligase and chalcone synthase both involved in flavonoid biosynthesis, leading to a remarkable increase in naringenin production in vitro.
Organizational Affiliation:
Department of Chemistry & Nanoscience, Ewha Womans University, Seoul 03760, Republic of Korea.
