4OKN

Crystal structure of human muscle L-lactate dehydrogenase, ternary complex with NADH and oxalate


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.245 
  • R-Value Work: 0.206 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structures of lactate dehydrogenase A (LDHA) in apo, ternary and inhibitor-bound forms.

Kolappan, S.Shen, D.L.Mosi, R.Sun, J.McEachern, E.J.Vocadlo, D.J.Craig, L.

(2015) Acta Crystallogr.,Sect.D 71: 185-195

  • DOI: 10.1107/S1399004714024791
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Lactate dehydrogenase (LDH) is an essential metabolic enzyme that catalyzes the interconversion of pyruvate and lactate using NADH/NAD(+) as a co-substrate. Many cancer cells exhibit a glycolytic phenotype known as the Warburg effect, in which elevat ...

    Lactate dehydrogenase (LDH) is an essential metabolic enzyme that catalyzes the interconversion of pyruvate and lactate using NADH/NAD(+) as a co-substrate. Many cancer cells exhibit a glycolytic phenotype known as the Warburg effect, in which elevated LDH levels enhance the conversion of glucose to lactate, making LDH an attractive therapeutic target for oncology. Two known inhibitors of the human muscle LDH isoform, LDHA, designated 1 and 2, were selected, and their IC50 values were determined to be 14.4 ± 3.77 and 2.20 ± 0.15 µM, respectively. The X-ray crystal structures of LDHA in complex with each inhibitor were determined; both inhibitors bind to a site overlapping with the NADH-binding site. Further, an apo LDHA crystal structure solved in a new space group is reported, as well as a complex with both NADH and the substrate analogue oxalate bound in seven of the eight molecules and an oxalate only bound in the eighth molecule in the asymmetric unit. In this latter structure, a kanamycin molecule is located in the inhibitor-binding site, thereby blocking NADH binding. These structures provide insights into LDHA enzyme mechanism and inhibition and a framework for structure-assisted drug design that may contribute to new cancer therapies.


    Organizational Affiliation

    Department of Molecular Biology and Biochemistry, Simon Fraser University, Burnaby, BC V5A 3Y6, Canada.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
L-lactate dehydrogenase A chain
A, B, C, D, E, F, G, H
337Homo sapiensMutation(s): 0 
Gene Names: LDHA
EC: 1.1.1.27
Find proteins for P00338 (Homo sapiens)
Go to Gene View: LDHA
Go to UniProtKB:  P00338
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A, B, C, D, E, F, G, H
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
OXL
Query on OXL

Download SDF File 
Download CCD File 
A, B, C, D, E, F, G, H
OXALATE ION
C2 O4
MUBZPKHOEPUJKR-UHFFFAOYSA-L
 Ligand Interaction
NAI
Query on NAI

Download SDF File 
Download CCD File 
A, C, D, E, F, G, H
1,4-DIHYDRONICOTINAMIDE ADENINE DINUCLEOTIDE
NADH
C21 H29 N7 O14 P2
BOPGDPNILDQYTO-NNYOXOHSSA-N
 Ligand Interaction
KAN
Query on KAN

Download SDF File 
Download CCD File 
B
KANAMYCIN A
C18 H36 N4 O11
SBUJHOSQTJFQJX-NOAMYHISSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.245 
  • R-Value Work: 0.206 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 65.550α = 90.00
b = 159.620β = 90.00
c = 266.160γ = 90.00
Software Package:
Software NamePurpose
Blu-Icedata collection
XDSdata reduction
XSCALEdata scaling
REFMACrefinement
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-12-03
    Type: Initial release
  • Version 1.1: 2015-02-11
    Type: Database references
  • Version 1.2: 2015-02-25
    Type: Database references