8U3P

1.79 Angstrom resolution crystal structure of KatG from Mycobacterium tuberculosis with an MYW cofactor after heat incubation for 60 minutes


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.79 Å
  • R-Value Free: 0.220 
  • R-Value Work: 0.179 
  • R-Value Observed: 0.179 

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


Literature

Indole N-Linked Hydroperoxyl Adduct of Protein-Derived Cofactor Modulating Catalase-Peroxidase Functions.

Li, J.Duan, R.Traore, E.S.Nguyen, R.C.Davis, I.Griffth, W.P.Goodwin, D.C.Jarzecki, A.A.Liu, A.

(2024) Angew Chem Int Ed Engl 63: e202407018-e202407018

  • DOI: https://doi.org/10.1002/anie.202407018
  • Primary Citation of Related Structures:  
    8CZP, 8U3P, 8W1W, 8W1X, 8W1Y

  • PubMed Abstract: 

    Bifunctional catalase-peroxidase (KatG) features a posttranslational methionine-tyrosine-tryptophan (MYW) crosslinked cofactor crucial for its catalase function, enabling pathogens to neutralize hydrogen peroxide during infection. We discovered the presence of indole nitrogen-linked hydroperoxyl adduct (MYW-OOH) in Mycobacterium tuberculosis KatG in the solution state under ambient conditions, suggesting its natural occurrence. By isolating predominantly MYW-OOH-containing KatG protein, we investigated the chemical stability and functional impact of MYW-OOH. We discovered that MYW-OOH inhibits catalase activity, presenting a unique temporary lock. Exposure to peroxide or increased temperature removes the hydroperoxyl adduct from the protein cofactor, converting MYW-OOH to MYW and restoring the detoxifying ability of the enzyme against hydrogen peroxide. Thus, the N-linked hydroperoxyl group is releasable. KatG with MYW-OOH represents a catalase dormant, but primed, state of the enzyme. These findings provide insight into chemical strategies targeting the bifunctional enzyme KatG in pathogens, highlighting the role of N-linked hydroperoxyl modifications in enzymatic function.


  • Organizational Affiliation

    University of Texas at San Antonio, Chemistry, UNITED STATES.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Catalase-peroxidase
A, B, C, D
741Mycobacterium tuberculosisMutation(s): 0 
Gene Names: katG
EC: 1.11.1.21
UniProt
Find proteins for P9WIE5 (Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv))
Explore P9WIE5 
Go to UniProtKB:  P9WIE5
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP9WIE5
Sequence Annotations
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  • Reference Sequence
Small Molecules
Ligands 4 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
HEM (Subject of Investigation/LOI)
Query on HEM

Download Ideal Coordinates CCD File 
F [auth A],
M [auth B],
V [auth C],
Z [auth D]
PROTOPORPHYRIN IX CONTAINING FE
C34 H32 Fe N4 O4
KABFMIBPWCXCRK-RGGAHWMASA-L
GOL
Query on GOL

Download Ideal Coordinates CCD File 
BA [auth D]
CA [auth D]
DA [auth D]
EA [auth D]
FA [auth D]
BA [auth D],
CA [auth D],
DA [auth D],
EA [auth D],
FA [auth D],
GA [auth D],
H [auth A],
I [auth A],
J [auth A],
K [auth A],
P [auth B],
Q [auth B],
R [auth B],
S [auth B],
T [auth B],
W [auth C],
X [auth C]
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
ACT
Query on ACT

Download Ideal Coordinates CCD File 
AA [auth D],
G [auth A],
N [auth B],
O [auth B]
ACETATE ION
C2 H3 O2
QTBSBXVTEAMEQO-UHFFFAOYSA-M
NA
Query on NA

Download Ideal Coordinates CCD File 
E [auth A],
L [auth B],
U [auth C],
Y [auth D]
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.79 Å
  • R-Value Free: 0.220 
  • R-Value Work: 0.179 
  • R-Value Observed: 0.179 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 150.58α = 90
b = 150.58β = 90
c = 311.542γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
SCALEPACKdata scaling
PDB_EXTRACTdata extraction
PHASERphasing
HKL-3000data reduction

Structure Validation

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Ligand Structure Quality Assessment 


Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesGM108988

Revision History  (Full details and data files)

  • Version 1.0: 2024-09-11
    Type: Initial release
  • Version 1.1: 2024-10-30
    Changes: Database references, Structure summary
  • Version 1.2: 2024-12-11
    Changes: Database references