4CQL

Crystal structure of heterotetrameric human ketoacyl reductase complexed with NAD


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.85 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.183 
  • R-Value Observed: 0.185 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Insights Into Mitochondrial Fatty Acid Synthesis from the Structure of Heterotetrameric 3-Ketoacyl-Acp Reductase/3R-Hydroxyacyl-Coa Dehydrogenase.

Venkatesan, R.Sah-Teli, S.K.Awoniyi, L.O.Jiang, G.Prus, P.Kastaniotis, A.J.Hiltunen, J.K.Wierenga, R.K.Chen, Z.

(2014) Nat Commun 5: 4805

  • DOI: 10.1038/ncomms5805
  • Primary Citation of Related Structures:  
    4CQL, 4CQM

  • PubMed Abstract: 
  • Mitochondrial fatty acid synthesis (mtFAS) is essential for respiratory growth in yeast and mammalian embryonic survival. The human 3-ketoacyl-acyl carrier protein (ACP) reductase (KAR) of mtFAS is a heterotetrameric α2β2-assembly composed of 17β-hydroxysteroid dehydrogenase type-8 (HSD17B8, α-subunit) and carbonyl reductase type-4 (CBR4, β-subunit) ...

    Mitochondrial fatty acid synthesis (mtFAS) is essential for respiratory growth in yeast and mammalian embryonic survival. The human 3-ketoacyl-acyl carrier protein (ACP) reductase (KAR) of mtFAS is a heterotetrameric α2β2-assembly composed of 17β-hydroxysteroid dehydrogenase type-8 (HSD17B8, α-subunit) and carbonyl reductase type-4 (CBR4, β-subunit). Here we provide a structural explanation for the stability of the heterotetramer from the crystal structure with NAD(+) and NADP(+) bound to the HSD17B8 and CBR4 subunits, respectively, and show that the catalytic activity of the NADPH- and ACP-dependent CBR4 subunit is crucial for a functional HsKAR. Therefore, mtFAS is NADPH- and ACP dependent, employing the 3R-hydroxyacyl-ACP intermediate. HSD17B8 assists in the formation of the competent HsKAR assembly. The intrinsic NAD(+)- and CoA-dependent activity of the HSD17B8 subunit on the 3R-hydroxyacyl-CoA intermediates may indicate a role for this subunit in routing 3R-hydroxyacyl-CoA esters, potentially arising from the metabolism of unsaturated fatty acids, into the mitochondrial β-oxidation pathway.


    Organizational Affiliation

    State Key Laboratory of Supramolecular Structure and Materials, Jilin University, Changchun 130012, China.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
ESTRADIOL 17-BETA-DEHYDROGENASE 8 ADEHILMP261Homo sapiensMutation(s): 0 
Gene Names: HSD17B8FABGLHKE6RING2SDR30C1
EC: 1.1.1.100 (PDB Primary Data), 1.1.1.62 (PDB Primary Data), 1.1.1.239 (PDB Primary Data), 1.1.1 (UniProt)
Find proteins for Q92506 (Homo sapiens)
Explore Q92506 
Go to UniProtKB:  Q92506
NIH Common Fund Data Resources
PHAROS:  Q92506
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
CARBONYL REDUCTASE FAMILY MEMBER 4 BCFGJKNO244Homo sapiensMutation(s): 0 
Gene Names: CBR4SDR45C1
EC: 1.1.1.100 (PDB Primary Data), 1 (UniProt), 1.1.1 (UniProt)
Find proteins for Q8N4T8 (Homo sapiens)
Explore Q8N4T8 
Go to UniProtKB:  Q8N4T8
NIH Common Fund Data Resources
PHAROS:  Q8N4T8
Protein Feature View
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.85 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.183 
  • R-Value Observed: 0.185 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 87.15α = 90
b = 237.11β = 94.52
c = 87.35γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
iMOSFLMdata reduction
SCALAdata scaling
PHASERphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2014-09-10
    Type: Initial release
  • Version 1.1: 2014-09-17
    Changes: Database references