7DKM

PHGDH covalently linked to oridonin


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.171 
  • R-Value Work: 0.136 
  • R-Value Observed: 0.138 

Starting Model: experimental
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Ligand Structure Quality Assessment 


This is version 1.1 of the entry. See complete history


Literature

Biophysical and biochemical properties of PHGDH revealed by studies on PHGDH inhibitors.

Tan, Y.Zhou, X.Gong, Y.Gou, K.Luo, Y.Jia, D.Dai, L.Zhao, Y.Sun, Q.

(2021) Cell Mol Life Sci 79: 27-27

  • DOI: https://doi.org/10.1007/s00018-021-04022-2
  • Primary Citation of Related Structures:  
    7DKM

  • PubMed Abstract: 

    The rate-limiting serine biogenesis enzyme PHGDH is overexpressed in cancers. Both serine withdrawal and genetic/pharmacological inhibition of PHGDH have demonstrated promising tumor-suppressing activities. However, the enzyme properties of PHGDH are not well understood and the discovery of PHGDH inhibitors is still in its infancy. Here, oridonin was identified from a natural product library as a new PHGDH inhibitor. The crystal structure of PHGDH in complex with oridonin revealed a new allosteric site. The binding of oridonin to this site reduced the activity of the enzyme by relocating R54, a residue involved in substrate binding. Mutagenesis studies showed that PHGDH activity was very sensitive to cysteine mutations, especially those in the substrate binding domain. Conjugation of oridonin and other reported covalent PHGDH inhibitors to these sites will therefore inhibit PHGDH. In addition to being inhibited enzymatically, PHGDH can also be inhibited by protein aggregation and proteasome-mediated degradation. Several tested PHGDH cancer mutants showed altered enzymatic activity, which can be explained by protein structure and stability. Overall, the above studies present new biophysical and biochemical insights into PHGDH and may facilitate the future design of PHGDH inhibitors.


  • Organizational Affiliation

    Department of Pathology, State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University and Collaborative Innovation Center of Biotherapy, Chengdu, 610041, China.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
D-3-phosphoglycerate dehydrogenase
A, B
314Homo sapiensMutation(s): 0 
Gene Names: PHGDHPGDH3
EC: 1.1.1.95 (PDB Primary Data), 1.1.1.399 (PDB Primary Data), 1.1.1.37 (PDB Primary Data)
UniProt & NIH Common Fund Data Resources
Find proteins for O43175 (Homo sapiens)
Explore O43175 
Go to UniProtKB:  O43175
PHAROS:  O43175
GTEx:  ENSG00000092621 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO43175
Sequence Annotations
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  • Reference Sequence
Small Molecules
Ligands 5 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
NAD
Query on NAD

Download Ideal Coordinates CCD File 
D [auth A],
G [auth B]
NICOTINAMIDE-ADENINE-DINUCLEOTIDE
C21 H27 N7 O14 P2
BAWFJGJZGIEFAR-NNYOXOHSSA-N
ODN (Subject of Investigation/LOI)
Query on ODN

Download Ideal Coordinates CCD File 
C [auth A](1beta,6beta,7beta,8alpha,9beta,10alpha,13alpha,14R,16beta)-1,6,7,14-tetrahydroxy-7,20-epoxykauran-15-one
C20 H30 O6
RWELMBQGCLVKOE-ZJOCIWLNSA-N
1PE
Query on 1PE

Download Ideal Coordinates CCD File 
I [auth B]PENTAETHYLENE GLYCOL
C10 H22 O6
JLFNLZLINWHATN-UHFFFAOYSA-N
CL
Query on CL

Download Ideal Coordinates CCD File 
E [auth A],
F [auth A]
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
NA
Query on NA

Download Ideal Coordinates CCD File 
H [auth B]SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.171 
  • R-Value Work: 0.136 
  • R-Value Observed: 0.138 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 43.18α = 90
b = 126.47β = 99.72
c = 59.287γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
HKL-2000data scaling
PDB_EXTRACTdata extraction
HKL-2000data reduction
MOLREPphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2022-02-02
    Type: Initial release
  • Version 1.1: 2023-11-29
    Changes: Data collection, Refinement description