5COD

Bovine heart complex I membrane domain


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 6.74 Å
  • R-Value Free: 0.435 
  • R-Value Work: 0.425 
  • R-Value Observed: 0.425 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structure of subcomplex I beta of mammalian respiratory complex I leads to new supernumerary subunit assignments.

Zhu, J.King, M.S.Yu, M.Klipcan, L.Leslie, A.G.Hirst, J.

(2015) Proc Natl Acad Sci U S A 112: 12087-12092

  • DOI: 10.1073/pnas.1510577112
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Mitochondrial complex I (proton-pumping NADH:ubiquinone oxidoreductase) is an essential respiratory enzyme. Mammalian complex I contains 45 subunits: 14 conserved "core" subunits and 31 "supernumerary" subunits. The structure of Bos taurus complex I, ...

    Mitochondrial complex I (proton-pumping NADH:ubiquinone oxidoreductase) is an essential respiratory enzyme. Mammalian complex I contains 45 subunits: 14 conserved "core" subunits and 31 "supernumerary" subunits. The structure of Bos taurus complex I, determined to 5-Å resolution by electron cryomicroscopy, described the structure of the mammalian core enzyme and allowed the assignment of 14 supernumerary subunits. Here, we describe the 6.8-Å resolution X-ray crystallography structure of subcomplex Iβ, a large portion of the membrane domain of B. taurus complex I that contains two core subunits and a cohort of supernumerary subunits. By comparing the structures and composition of subcomplex Iβ and complex I, supported by comparisons with Yarrowia lipolytica complex I, we propose assignments for eight further supernumerary subunits in the structure. Our new assignments include two CHCH-domain containing subunits that contain disulfide bridges between CX9C motifs; they are processed by the Mia40 oxidative-folding pathway in the intermembrane space and probably stabilize the membrane domain. We also assign subunit B22, an LYR protein, to the matrix face of the membrane domain. We reveal that subunit B22 anchors an acyl carrier protein (ACP) to the complex, replicating the LYR protein-ACP structural module that was identified previously in the hydrophilic domain. Thus, we significantly extend knowledge of how the mammalian supernumerary subunits are arranged around the core enzyme, and provide insights into their roles in biogenesis and regulation.


    Organizational Affiliation

    Medical Research Council Mitochondrial Biology Unit, Cambridge, CB2 0XY, United Kingdom; jh@mrc-mbu.cam.ac.uk.



Macromolecules

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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
NADH-ubiquinone oxidoreductase chain 5L1, L2, L3, L4, L5, L6606Bos taurusMutation(s): 0 
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
NADH-ubiquinone oxidoreductase chain 4M1, M2, M3, M4, M5, M6459Bos taurusMutation(s): 0 
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Unknown structuref1, f2, f3, f4, f5, f6, h1, h2, h3, h4, h5, h6, i1, i2, i3, i4, i5, i630Bos taurusMutation(s): 0 
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
Unknown structureg1, g2, g3, g4, g5, g622Bos taurusMutation(s): 0 
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Entity ID: 5
MoleculeChainsSequence LengthOrganismDetails
Unknown structurej1, j2, j3, j4, j5, j6, k1, k2, k3, k4, k5, k6, p1, p2, p3, p4, p5, p6, s1, s2, s3, s4, s5, s628Bos taurusMutation(s): 0 
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Entity ID: 6
MoleculeChainsSequence LengthOrganismDetails
Unknown structurel1, l2, l3, l4, l5, l613Bos taurusMutation(s): 0 
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Entity ID: 7
MoleculeChainsSequence LengthOrganismDetails
SDAPU1, U2, U3, U4, U5, U688Bos taurusMutation(s): 0 
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Entity ID: 8
MoleculeChainsSequence LengthOrganismDetails
Unknown structuren1, n2, n3, n4, n5, n659Bos taurusMutation(s): 0 
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Entity ID: 9
MoleculeChainsSequence LengthOrganismDetails
Unknown structureo1, o2, o3, o4, o5, o621Bos taurusMutation(s): 0 
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Entity ID: 10
MoleculeChainsSequence LengthOrganismDetails
Unknown structuret1, t2, t3, t4, t5, t657Bos taurusMutation(s): 0 
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Entity ID: 11
MoleculeChainsSequence LengthOrganismDetails
Unknown structureu1, u2, u3, u4, u5, u615Bos taurusMutation(s): 0 
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Entity ID: 12
MoleculeChainsSequence LengthOrganismDetails
Unknown structurev1, v2, v3, v4, v5, v632Bos taurusMutation(s): 0 
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Entity ID: 13
MoleculeChainsSequence LengthOrganismDetails
Unknown structurew1, w2, w3, w4, w5, w627Bos taurusMutation(s): 0 
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Entity ID: 14
MoleculeChainsSequence LengthOrganismDetails
Unknown structureBA, BB, BC, BD, BE, BF146Bos taurusMutation(s): 0 
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Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 6.74 Å
  • R-Value Free: 0.435 
  • R-Value Work: 0.425 
  • R-Value Observed: 0.425 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 244.832α = 90
b = 251.414β = 90
c = 412.034γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
MOSFLMdata reduction
PHENIXrefinement
Cootmodel building
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2015-09-23
    Type: Initial release
  • Version 1.1: 2015-10-07
    Changes: Database references