9C8C

Structure of proline utilization A with the FAD covalently-modified by propanal resulting from inactivation with N-allylglycine


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.54 Å
  • R-Value Free: 0.205 
  • R-Value Work: 0.186 
  • R-Value Observed: 0.187 

Starting Model: experimental
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Literature

Noncovalent Inhibition and Covalent Inactivation of Proline Dehydrogenase by Analogs of N -Propargylglycine.

Tanner, J.J.Ji, J.Bogner, A.N.Scott, G.K.Patel, S.M.Seravalli, J.Gates, K.S.Benz, C.C.Becker, D.F.

(2024) Biochemistry 

  • DOI: https://doi.org/10.1021/acs.biochem.4c00429
  • Primary Citation of Related Structures:  
    8UPZ, 8UQ0, 8UQ1, 9C8A, 9C8B, 9C8C

  • PubMed Abstract: 

    The flavoenzyme proline dehydrogenase (PRODH) catalyzes the first step of proline catabolism, the oxidation of l-proline to Δ 1 -pyrroline-5-carboxylate. The enzyme is a target for chemical probe discovery because of its role in the metabolism of certain cancer cells. N -propargylglycine is the first and best characterized mechanism-based covalent inactivator of PRODH. This compound consists of a recognition module (glycine) that directs the inactivator to the active site and an alkyne warhead that reacts with the FAD after oxidative activation, leading to covalent modification of the FAD N5 atom. Here we report structural and kinetic data on analogs of N -propargylglycine with the goals of understanding the initial docking step of the inactivation mechanism and to test the allyl group as a warhead. The crystal structures of PRODH complexed with unreactive analogs in which N is replaced by S show how the recognition module mimics the substrate proline by forming ion pairs with conserved arginine and lysine residues. Further, the C atom adjacent to the alkyne warhead is optimally positioned for hydride transfer to the FAD, providing the structural basis for the first bond-breaking step of the inactivation mechanism. The structures also suggest new strategies for designing improved N -propargylglycine analogs. N -allylglycine, which consists of a glycine recognition module and allyl warhead, is shown to be a covalent inactivator; however, it is less efficient than N -propargylglycine in both enzyme inactivation and cellular assays. Crystal structures of the N -allylglycine-inactivated enzyme are consistent with covalent modification of the N5 by propanal.


  • Organizational Affiliation

    Department of Biochemistry, University of Missouri, Columbia, Missouri 65211, United States.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Bifunctional protein PutA
A, B
1,235Sinorhizobium meliloti SM11Mutation(s): 1 
Gene Names: putASM11_chr0102
EC: 1.5.5.2 (PDB Primary Data), 1.2.1.88 (PDB Primary Data)
UniProt
Find proteins for F7X6I3 (Sinorhizobium meliloti (strain SM11))
Explore F7X6I3 
Go to UniProtKB:  F7X6I3
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupF7X6I3
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 8 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
FDA (Subject of Investigation/LOI)
Query on FDA

Download Ideal Coordinates CCD File 
C [auth A],
L [auth B]
DIHYDROFLAVINE-ADENINE DINUCLEOTIDE
C27 H35 N9 O15 P2
YPZRHBJKEMOYQH-UYBVJOGSSA-N
NAD
Query on NAD

Download Ideal Coordinates CCD File 
E [auth A],
O [auth B]
NICOTINAMIDE-ADENINE-DINUCLEOTIDE
C21 H27 N7 O14 P2
BAWFJGJZGIEFAR-NNYOXOHSSA-N
PGE
Query on PGE

Download Ideal Coordinates CCD File 
R [auth B]TRIETHYLENE GLYCOL
C6 H14 O4
ZIBGPFATKBEMQZ-UHFFFAOYSA-N
A1AV8 (Subject of Investigation/LOI)
Query on A1AV8

Download Ideal Coordinates CCD File 
N [auth B]N-(prop-2-en-1-yl)glycine
C5 H9 N O2
YVWGGGZYGSZDKW-UHFFFAOYSA-N
PEG
Query on PEG

Download Ideal Coordinates CCD File 
K [auth A],
S [auth B],
T [auth B]
DI(HYDROXYETHYL)ETHER
C4 H10 O3
MTHSVFCYNBDYFN-UHFFFAOYSA-N
SO4
Query on SO4

Download Ideal Coordinates CCD File 
G [auth A],
H [auth A],
I [auth A],
J [auth A],
Q [auth B]
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
CBG (Subject of Investigation/LOI)
Query on CBG

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D [auth A],
M [auth B]
PROPANAL
C3 H6 O
NBBJYMSMWIIQGU-UHFFFAOYSA-N
MG
Query on MG

Download Ideal Coordinates CCD File 
F [auth A],
P [auth B]
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.54 Å
  • R-Value Free: 0.205 
  • R-Value Work: 0.186 
  • R-Value Observed: 0.187 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 101.245α = 90
b = 102.309β = 106.531
c = 127.005γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
Aimlessdata scaling
XDSdata reduction
PHENIXphasing

Structure Validation

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Entry History & Funding Information

Deposition Data

  • Released Date: 2024-10-30 
  • Deposition Author(s): Tanner, J.J.

Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United States1R01GM132640

Revision History  (Full details and data files)

  • Version 1.0: 2024-10-30
    Type: Initial release