4O9T

Mechanism of transhydrogenase coupling proton translocation and hydride transfer


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.079 Å
  • R-Value Free: 0.280 
  • R-Value Work: 0.219 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural biology. Division of labor in transhydrogenase by alternating proton translocation and hydride transfer.

Leung, J.H.Schurig-Briccio, L.A.Yamaguchi, M.Moeller, A.Speir, J.A.Gennis, R.B.Stout, C.D.

(2015) Science 347: 178-181

  • DOI: 10.1126/science.1260451
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • NADPH/NADP(+) (the reduced form of NADP(+)/nicotinamide adenine dinucleotide phosphate) homeostasis is critical for countering oxidative stress in cells. Nicotinamide nucleotide transhydrogenase (TH), a membrane enzyme present in both bacteria and mi ...

    NADPH/NADP(+) (the reduced form of NADP(+)/nicotinamide adenine dinucleotide phosphate) homeostasis is critical for countering oxidative stress in cells. Nicotinamide nucleotide transhydrogenase (TH), a membrane enzyme present in both bacteria and mitochondria, couples the proton motive force to the generation of NADPH. We present the 2.8 Å crystal structure of the transmembrane proton channel domain of TH from Thermus thermophilus and the 6.9 Å crystal structure of the entire enzyme (holo-TH). The membrane domain crystallized as a symmetric dimer, with each protomer containing a putative proton channel. The holo-TH is a highly asymmetric dimer with the NADP(H)-binding domain (dIII) in two different orientations. This unusual arrangement suggests a catalytic mechanism in which the two copies of dIII alternatively function in proton translocation and hydride transfer.


    Organizational Affiliation

    Department of Integrative Structural and Computational Biology, The Scripps Research Institute, La Jolla, CA 92037, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
NAD(P) transhydrogenase subunit alpha 2
A, C, E, G
100Thermus thermophilus (strain HB27 / ATCC BAA-163 / DSM 7039)Mutation(s): 0 
EC: 1.6.1.2
Find proteins for Q72GR9 (Thermus thermophilus (strain HB27 / ATCC BAA-163 / DSM 7039))
Go to UniProtKB:  Q72GR9
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
NAD(P) transhydrogenase subunit beta
B, D, F, H
283Thermus thermophilus (strain HB27 / ATCC BAA-163 / DSM 7039)Mutation(s): 0 
EC: 7.1.1.1
Find proteins for Q72GS0 (Thermus thermophilus (strain HB27 / ATCC BAA-163 / DSM 7039))
Go to UniProtKB:  Q72GS0
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.079 Å
  • R-Value Free: 0.280 
  • R-Value Work: 0.219 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 97.221α = 90.00
b = 86.388β = 93.99
c = 125.149γ = 90.00
Software Package:
Software NamePurpose
SCALAdata scaling
XDSdata reduction
PHASERphasing
REFMACrefinement
Blu-Icedata collection

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-06-11
    Type: Initial release
  • Version 1.1: 2014-06-18
    Type: Structure summary
  • Version 1.2: 2015-01-28
    Type: Database references