7WVZ

CalA3_modular PKS_KS-AT-DH-KR


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.38 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history

Re-refinement Note

A newer entry is available that reflects an alternative modeling of the original data: 8I4Y 8I4Z


Literature

C-N bond formation by a polyketide synthase.

Wang, J.Wang, X.Li, X.Kong, L.Du, Z.Li, D.Gou, L.Wu, H.Cao, W.Wang, X.Lin, S.Shi, T.Deng, Z.Wang, Z.Liang, J.

(2023) Nat Commun 14: 1319-1319

  • DOI: https://doi.org/10.1038/s41467-023-36989-w
  • Primary Citation of Related Structures:  
    7WVZ, 8I4Y, 8I4Z

  • PubMed Abstract: 

    Assembly-line polyketide synthases (PKSs) are molecular factories that produce diverse metabolites with wide-ranging biological activities. PKSs usually work by constructing and modifying the polyketide backbone successively. Here, we present the cryo-EM structure of CalA3, a chain release PKS module without an ACP domain, and its structures with amidation or hydrolysis products. The domain organization reveals a unique "∞"-shaped dimeric architecture with five connected domains. The catalytic region tightly contacts the structural region, resulting in two stabilized chambers with nearly perfect symmetry while the N-terminal docking domain is flexible. The structures of the ketosynthase (KS) domain illustrate how the conserved key residues that canonically catalyze C-C bond formation can be tweaked to mediate C-N bond formation, revealing the engineering adaptability of assembly-line polyketide synthases for the production of novel pharmaceutical agents.


  • Organizational Affiliation

    State Key Laboratory of Microbial Metabolism, Joint International Research Laboratory of Metabolic & Developmental Sciences, and School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Beta-ketoacyl-acyl-carrier-protein synthase I
A, B
1,738Streptomyces chartreusis NRRL 3882Mutation(s): 0 
Gene Names: SCNRRL3882_6975
EC: 2.3.1.41
UniProt
Find proteins for A0A2N9BJK0 (Streptomyces chartreusis NRRL 3882)
Explore A0A2N9BJK0 
Go to UniProtKB:  A0A2N9BJK0
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA0A2N9BJK0
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.38 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Other governmentChina2019YFA0905400

Revision History  (Full details and data files)

  • Version 1.0: 2023-02-22
    Type: Initial release
  • Version 1.1: 2023-10-11
    Changes: Data collection, Database references