1XME

Structure of Recombinant Cytochrome ba3 Oxidase from Thermus thermophilus

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.217 
  • R-Value Observed: 0.217 

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This is version 1.3 of the entry. See complete history. 


Literature

A novel cryoprotection scheme for enhancing the diffraction of crystals of recombinant cytochrome ba3 oxidase from Thermus thermophilus.

Hunsicker-Wang, L.M., Pacoma, R.L., Chen, Y., Fee, J.A., Stout, C.D.

(2005) Acta Crystallogr D Biol Crystallogr 61: 340-343

  • DOI: 10.1107/S0907444904033906
  • Primary Citation of Related Structures:  
    1XME

  • PubMed Abstract: 

    • Cytochrome ba(3) oxidase is an integral membrane protein identified in the thermophilic bacterium Thermus thermophilus. The enzyme has now been expressed recombinantly and purified with a histidine tag. As such, it crystallizes under similar conditions and in the same space group (P4(3)2(1)2) as the native protein ...

    Cytochrome ba(3) oxidase is an integral membrane protein identified in the thermophilic bacterium Thermus thermophilus. The enzyme has now been expressed recombinantly and purified with a histidine tag. As such, it crystallizes under similar conditions and in the same space group (P4(3)2(1)2) as the native protein. A novel cryoprotection scheme is described here to obtain high-resolution diffraction from these crystals, which involves soaking in a mixture of glycerol and ethylene glycol under a layer of oil. The unit-cell parameters for these crystals are larger than the native protein, apparently deriving from increased ordering of the N-terminus and an internal loop (residues 495-500) in subunit I. Hence, compared with native cytochrome ba(3) oxidase, the recombinant His-tagged protein is accommodated in an expanded but equally well ordered lattice via an alternate set of specific intermolecular contacts. The structure was refined against data to 2.3 angstroms resolution to an R factor of 21.7% and an R(free) of 23.7%.

    Organizational Affiliation: 

    Department of Molecular Biology, The Scripps Research Institute, MB8, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Cytochrome c oxidase polypeptide IA568Thermus thermophilusMutation(s): 0 
Gene Names: cbaA
EC: 1.9.3.1 (PDB Primary Data), 7.1.1.9 (UniProt)
Membrane Entity: Yes 
UniProt
Find proteins for Q5SJ79 (Thermus thermophilus (strain ATCC 27634 / DSM 579 / HB8))
Explore Q5SJ79 
Go to UniProtKB:  Q5SJ79
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ5SJ79
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Cytochrome c oxidase polypeptide IIB168Thermus thermophilusMutation(s): 0 
Gene Names: cbaB, ctaC
EC: 1.9.3.1 (PDB Primary Data), 7.1.1.9 (UniProt)
Membrane Entity: Yes 
UniProt
Find proteins for Q5SJ80 (Thermus thermophilus (strain ATCC 27634 / DSM 579 / HB8))
Explore Q5SJ80 
Go to UniProtKB:  Q5SJ80
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ5SJ80
Protein Feature View
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Cytochrome c oxidase polypeptide IIAC34Thermus thermophilusMutation(s): 0 
Gene Names: cbaD
EC: 1.9.3.1 (PDB Primary Data), 7.1.1.9 (UniProt)
Membrane Entity: Yes 
UniProt
Find proteins for P82543 (Thermus thermophilus (strain ATCC 27634 / DSM 579 / HB8))
Explore P82543 
Go to UniProtKB:  P82543
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP82543
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 6 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
HAS
Query on HAS
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G [auth A]HEME-AS
C54 H64 Fe N4 O6
PDYODZVCODUKFH-QIHJKJTBDH		 Ligand Interaction
HEM
Query on HEM
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F [auth A]PROTOPORPHYRIN IX CONTAINING FE
C34 H32 Fe N4 O4
KABFMIBPWCXCRK-RGGAHWMASA-L		 Ligand Interaction
BNG
Query on BNG
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D [auth A]nonyl beta-D-glucopyranoside
C15 H30 O6
QFAPUKLCALRPLH-UXXRCYHCSA-N		 Ligand Interaction
CUA
Query on CUA
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I [auth B]DINUCLEAR COPPER ION
Cu2
ALKZAGKDWUSJED-UHFFFAOYSA-N		 Ligand Interaction
GOL
Query on GOL
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H [auth A]GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N		 Ligand Interaction
CU
Query on CU
Download Ideal Coordinates CCD File 
E [auth A]COPPER (II) ION
Cu
JPVYNHNXODAKFH-UHFFFAOYSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.217 
  • R-Value Observed: 0.217 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 114.902α = 90
b = 114.902β = 90
c = 177.064γ = 90
Software Package:
Software NamePurpose
CNSrefinement
MOSFLMdata reduction
CCP4data scaling
MOLREPphasing

Structure Validation

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Ligand Structure Quality Assessment 


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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2005-03-22
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Non-polymer description, Version format compliance
  • Version 1.3: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Data collection, Database references, Derived calculations, Structure summary