1GUF

Enoyl thioester reductase from Candida tropicalis

• PDB DOI: https://doi.org/10.2210/pdb1GUF/pdb

• Classification: OXIDOREDUCTASE
• Organism(s): Candida tropicalis
• Expression System: Saccharomyces cerevisiae
• Mutation(s): No 


• Deposited: 2002-01-25 Released: 2003-03-13 
• Deposition Author(s): Airenne, T.T., Torkko, J.M., Van Der Plas, S., Sormunen, R.T., Kastaniotis, A.J., Wierenga, R.K., Hiltunen, J.K.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.25 Å
• R-Value Free: 0.215 
• R-Value Work: 0.178 
• R-Value Observed: 0.178 

Starting Model: experimental

Literature

Structure-Function Analysis of Enoyl Thioester Reductase Involved in Mitochondrial Maintenance

Airenne, T.T., Torkko, J.M., Van Der Plas, S., Sormunen, R.T., Kastaniotis, A.J., Wierenga, R.K., Hiltunen, J.K.

(2003) J Mol Biol 327: 47

• PubMed: 12614607 
• DOI: https://doi.org/10.1016/s0022-2836(03)00038-x
• Primary Citation of Related Structures:  
  1GU7, 1GUF, 1GYR


• PubMed Abstract: 
  

  Candida tropicalis enoyl thioester reductase Etr1p and the Saccharomyces cerevisiae homologue Mrf1p catalyse the NADPH-dependent reduction of trans-2-enoyl thioesters in mitochondrial fatty acid synthesis (FAS). Unlike prokaryotic enoyl thioester reductases (ETRs), which belong to the short-chain dehydrogenases/reductases (SDR), Etr1p and Mrf1p represent structurally distinguishable ETRs that belong to the medium-chain dehydrogenases/reductases (MDR) superfamily, indicating independent origin of two separate classes of ETRs. The crystal structures of Etr1p, the Etr1p-NADPH complex and the Etr1Y79Np mutant were refined to 1.70A, 2.25A and 2.60A resolution, respectively. The native fold of Etr1p was maintained in Etr1Y79Np, but the mutant had only 0.1% of Etr1p catalytic activity remaining and failed to rescue the respiratory deficient phenotype of the mrf1Delta strain. Mutagenesis of Tyr73 in Mrf1p, corresponding to Tyr79 in Etr1p, produced similar results. Our data indicate that the mitochondrial reductase activity is indispensable for respiratory function in yeast, emphasizing the significance of Mrf1p (Etr1p) and mitochondrial FAS for the integrity of the respiratory competent organelle.

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Organizational Affiliation: 

Biocenter Oulu and Department of Biochemistry, P.O. Box 3000, FIN-90014 University of Oulu, Finland.

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 81.83 kDa 
• Atom Count: 6,335 
• Modelled Residue Count: 728 
• Deposited Residue Count: 728 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
ENOYL-[ACYL-CARRIER-PROTEIN] REDUCTASE [NADPH, B-SPECIFIC] 1, MITOCHONDRIAL	A, B	364	Candida tropicalis	Mutation(s): 0  EC: 1.3.1.10 (PDB Primary Data), 1.3.1.38 (PDB Primary Data), 1.3.1.104 (UniProt)
UniProt
Find proteins for Q8WZM3 (Candida tropicalis) Explore Q8WZM3  Go to UniProtKB:  Q8WZM3

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
NDP	I [auth A], Q [auth B]	NADPH DIHYDRO-NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE C21 H30 N7 O17 P3 ACFIXJIJDZMPPO-NNYOXOHSSA-N
SO4	F [auth A], G [auth A], H [auth A], J [auth A], K [auth A], N [auth B], O [auth B], P [auth B]	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L
GOL	C [auth A], D [auth A], E [auth A], L [auth B], M [auth B]	GLYCEROL C3 H8 O3 PEDCQBHIVMGVHV-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.25 Å
• R-Value Free: 0.215 
• R-Value Work: 0.178 
• R-Value Observed: 0.178 
• Space Group: P 3₁ 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 92.17	α = 90
b = 92.17	β = 90
c = 225.66	γ = 120

Software Package:

Software Name	Purpose
CNS	refinement
DENZO	data reduction
SCALEPACK	data scaling
CNS	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2003-03-13 
Deposition Author(s): Airenne, T.T., Torkko, J.M., Van Der Plas, S., Sormunen, R.T., Kastaniotis, A.J., Wierenga, R.K., Hiltunen, J.K.

Revision History  

• Version 1.0: 2003-03-13
  Type: Initial release
  
• Version 1.1: 2011-08-31
  Changes: Database references, Derived calculations, Non-polymer description, Other, Refinement description, Source and taxonomy, Structure summary, Version format compliance
• Version 1.2: 2017-06-28
  Changes: Data collection
• Version 1.3: 2023-12-13
  Changes: Data collection, Database references, Derived calculations, Other, Refinement description