9G0K

CysG(N-16) in complex with SAH (metal free, cocrystallization in presence of EDTA) from Kitasatospora cystarginea


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.261 
  • R-Value Work: 0.214 
  • R-Value Observed: 0.216 

Starting Model: experimental
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This is version 1.2 of the entry. See complete history


Literature

Deciphering the SAM- and metal-dependent mechanism of O-methyltransferases in cystargolide and belactosin biosynthesis: A structure-activity relationship study.

Kuttenlochner, W.Beller, P.Kaysser, L.Groll, M.

(2024) J Biol Chem 300: 107646-107646

  • DOI: https://doi.org/10.1016/j.jbc.2024.107646
  • Primary Citation of Related Structures:  
    9FCD, 9FCE, 9FCL, 9FCQ, 9FCS, 9FCU, 9FCX, 9FCY, 9FD3, 9G0K

  • PubMed Abstract: 

    Cystargolides and belactosins are natural products with a distinct dipeptide structure and an electrophilic β-lactone warhead. They are known to inhibit proteases such as the proteasome or caseinolytic protease P, highlighting their potential in treating cancers and neurodegenerative diseases. Recent genetic analyses have shown homology between the biosynthetic pathways of the two inhibitors. Here, we characterize the O-methyltransferases BelI and CysG, which catalyze the initial step of β-lactone formation. Employing techniques such as crystallography, computational analysis, mutagenesis, and activity assays, we identified a His-His-Asp (HHD) motif in the active sites of the two enzymes, which is crucial for binding a catalytically active calcium ion. Our findings thus elucidate a conserved divalent metal-dependent mechanism in both biosynthetic pathways that distinguishes BelI and CysG from previously characterized O-methyltransferases.


  • Organizational Affiliation

    Department of Bioscience, Center for Protein Assemblies (CPA), TUM School of Natural Sciences, Technical University of Munich, Garching, Germany. Electronic address: wolfgang.kuttenlochner@tum.de.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
SAM-dependent methyltransferase
A, B
215Kitasatospora cystargineaMutation(s): 0 
Gene Names: cysG
UniProt
Find proteins for A0A1W6R556 (Kitasatospora cystarginea)
Explore A0A1W6R556 
Go to UniProtKB:  A0A1W6R556
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA0A1W6R556
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.261 
  • R-Value Work: 0.214 
  • R-Value Observed: 0.216 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 99.61α = 90
b = 103.12β = 90
c = 49.96γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata reduction
XSCALEdata scaling
REFMACphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
German Research Foundation (DFG)GermanySFB 1309 - 325871075

Revision History  (Full details and data files)

  • Version 1.0: 2024-07-17
    Type: Initial release
  • Version 1.1: 2024-08-21
    Changes: Database references
  • Version 1.2: 2024-09-18
    Changes: Database references