5TTB

Solution structure of apo ArCP from yersiniabactin synthetase

Summary for 5TTB

• Entry DOI: 10.2210/pdb5ttb/pdb
• NMR Information: BMRB: 30199
• Descriptor: Siderophore yersiniabactin (1 entity in total)
• Functional Keywords: apo carrier protein, nonribosomal peptide synthetase, ligase
• Biological source: Yersinia pestis
• Total number of polymer chains: 1
• Total formula weight: 9771.06

Authors

Frueh, D.P.,Goodrich, A.C. (deposition date: 2016-11-02, release date: 2017-05-10, Last modification date: 2024-05-15)

Primary citation

Goodrich, A.C.,Meyers, D.J.,Frueh, D.P.
Molecular impact of covalent modifications on nonribosomal peptide synthetase carrier protein communication.
J. Biol. Chem., 292:10002-10013, 2017

PubMed Abstract: Nonribosomal peptide synthesis involves the interplay between covalent protein modifications, conformational fluctuations, catalysis, and transient protein-protein interactions. Delineating the mechanisms involved in orchestrating these various processes will deepen our understanding of domain-domain communication in nonribosomal peptide synthetases (NRPSs) and lay the groundwork for the rational reengineering of NRPSs by swapping domains handling different substrates to generate novel natural products. Although many structural and biochemical studies of NRPSs exist, few studies have focused on the energetics and dynamics governing the interactions in these systems. Here, we present detailed binding studies of an adenylation domain and its partner carrier protein in apo-, holo-, and substrate-loaded forms. Results from fluorescence anisotropy, isothermal titration calorimetry, and NMR titrations indicated that covalent modifications to a carrier protein modulate domain communication, suggesting that chemical modifications to carrier proteins during NRPS synthesis may impart directionality to sequential NRPS domain interactions. Comparison of the structure and dynamics of an apo-aryl carrier protein with those of its modified forms revealed structural fluctuations induced by post-translational modifications and mediated by modulations of protein dynamics. The results provide a comprehensive molecular description of a carrier protein throughout its life cycle and demonstrate how a network of dynamic residues can propagate the molecular impact of chemical modifications throughout a protein and influence its affinity toward partner domains.

PubMed: 28455448
DOI: 10.1074/jbc.M116.766220

Experimental method

SOLUTION NMR