1T9G

Structure of the human MCAD:ETF complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.90 Å
  • R-Value Free: 0.263 
  • R-Value Work: 0.191 
  • R-Value Observed: 0.195 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Extensive domain motion and electron transfer in the human electron transferring flavoprotein-medium chain Acyl-CoA dehydrogenase complex

Toogood, H.S.van Thiel, A.Basran, J.Sutcliffe, M.J.Scrutton, N.S.Leys, D.

(2004) J Biol Chem 279: 32904-32912

  • DOI: 10.1074/jbc.M404884200
  • Primary Citation of Related Structures:  
    1T9G

  • PubMed Abstract: 
  • The crystal structure of the human electron transferring flavoprotein (ETF).medium chain acyl-CoA dehydrogenase (MCAD) complex reveals a dual mode of protein-protein interaction, imparting both specificity and promiscuity in the interaction of ETF with a range of structurally distinct primary dehydrogenases ...

    The crystal structure of the human electron transferring flavoprotein (ETF).medium chain acyl-CoA dehydrogenase (MCAD) complex reveals a dual mode of protein-protein interaction, imparting both specificity and promiscuity in the interaction of ETF with a range of structurally distinct primary dehydrogenases. ETF partitions the functions of partner binding and electron transfer between (i) the recognition loop, which acts as a static anchor at the ETF.MCAD interface, and (ii) the highly mobile redox active FAD domain. Together, these enable the FAD domain of ETF to sample a range of conformations, some compatible with fast interprotein electron transfer. Disorders in amino acid or fatty acid catabolism can be attributed to mutations at the protein-protein interface. Crucially, complex formation triggers mobility of the FAD domain, an induced disorder that contrasts with general models of protein-protein interaction by induced fit mechanisms. The subsequent interfacial motion in the MCAD.ETF complex is the basis for the interaction of ETF with structurally diverse protein partners. Solution studies using ETF and MCAD with mutations at the protein-protein interface support this dynamic model and indicate ionic interactions between MCAD Glu(212) and ETF Arg alpha(249) are likely to transiently stabilize productive conformations of the FAD domain leading to enhanced electron transfer rates between both partners.


    Organizational Affiliation

    Department of Biochemistry, University of Leicester, Leicester LE1 7RH, United Kingdom.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Acyl-CoA dehydrogenase, medium-chain specific, mitochondrialA, B, C, D396Homo sapiensMutation(s): 0 
Gene Names: ACADM
EC: 1.3.99.3 (PDB Primary Data), 1.3.8.7 (UniProt)
Find proteins for P11310 (Homo sapiens)
Explore P11310 
Go to UniProtKB:  P11310
NIH Common Fund Data Resources
PHAROS:  P11310
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Electron transfer flavoprotein alpha-subunit, mitochondrialE [auth R]333Homo sapiensMutation(s): 0 
Gene Names: ETFA
Find proteins for P13804 (Homo sapiens)
Explore P13804 
Go to UniProtKB:  P13804
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PHAROS:  P13804
Protein Feature View
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Electron transfer flavoprotein beta-subunitF [auth S]255Homo sapiensMutation(s): 0 
Gene Names: ETFBFP585
Find proteins for P38117 (Homo sapiens)
Explore P38117 
Go to UniProtKB:  P38117
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PHAROS:  P38117
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
FAD
Query on FAD

Download Ideal Coordinates CCD File 
G [auth A], H [auth B], I [auth C], J [auth D]FLAVIN-ADENINE DINUCLEOTIDE
C27 H33 N9 O15 P2
VWWQXMAJTJZDQX-UYBVJOGSSA-N
 Ligand Interaction
AMP
Query on AMP

Download Ideal Coordinates CCD File 
K [auth S]ADENOSINE MONOPHOSPHATE
C10 H14 N5 O7 P
UDMBCSSLTHHNCD-KQYNXXCUSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.90 Å
  • R-Value Free: 0.263 
  • R-Value Work: 0.191 
  • R-Value Observed: 0.195 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 94.333α = 90
b = 101.322β = 90
c = 244.785γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2004-06-08
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance