3U9T

Crystal structure of P. aeruginosa 3-methylcrotonyl-CoA carboxylase (MCC) 750 kD holoenzyme, free enzyme


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.9 Å
  • R-Value Free: 0.269 
  • R-Value Work: 0.209 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

An unanticipated architecture of the 750-kDa {alpha}6{beta}6 holoenzyme of 3-methylcrotonyl-CoA carboxylase

Huang, C.S.Ge, P.Zhou, Z.H.Tong, L.

(2012) Nature 481: 219-223

  • DOI: 10.1038/nature10691
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • 3-Methylcrotonyl-CoA carboxylase (MCC), a member of the biotin-dependent carboxylase superfamily, is essential for the metabolism of leucine, and deficient mutations in this enzyme are linked to methylcrotonylglycinuria (MCG) and other serious diseas ...

    3-Methylcrotonyl-CoA carboxylase (MCC), a member of the biotin-dependent carboxylase superfamily, is essential for the metabolism of leucine, and deficient mutations in this enzyme are linked to methylcrotonylglycinuria (MCG) and other serious diseases in humans. MCC has strong sequence conservation with propionyl-CoA carboxylase (PCC), and their holoenzymes are both 750-kilodalton (kDa) α(6)β(6) dodecamers. Therefore the architecture of the MCC holoenzyme is expected to be highly similar to that of PCC. Here we report the crystal structures of the Pseudomonas aeruginosa MCC (PaMCC) holoenzyme, alone and in complex with coenzyme A. Surprisingly, the structures show that the architecture and overall shape of PaMCC are markedly different when compared to PCC. The α-subunits show trimeric association in the PaMCC holoenzyme, whereas they have no contacts with each other in PCC. Moreover, the positions of the two domains in the β-subunit of PaMCC are swapped relative to those in PCC. This structural information establishes a foundation for understanding the disease-causing mutations of MCC and provides new insights into the catalytic mechanism and evolution of biotin-dependent carboxylases. The large structural differences between MCC and PCC also have general implications for the relationship between sequence conservation and structural similarity.


    Organizational Affiliation

    Department of Biological Sciences, Columbia University, New York, New York 10027, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Methylcrotonyl-CoA carboxylase, alpha-subunit
A
655Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1)Mutation(s): 0 
Gene Names: liuD
Find proteins for Q9I299 (Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1))
Go to UniProtKB:  Q9I299
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Methylcrotonyl-CoA carboxylase, beta-subunit
B
555Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1)Mutation(s): 0 
Gene Names: liuB
Find proteins for Q9I297 (Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1))
Go to UniProtKB:  Q9I297
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.9 Å
  • R-Value Free: 0.269 
  • R-Value Work: 0.209 
  • Space Group: H 3 2
Unit Cell:
Length (Å)Angle (°)
a = 158.930α = 90.00
b = 158.930β = 90.00
c = 311.970γ = 120.00
Software Package:
Software NamePurpose
PHASERphasing
DENZOdata reduction
CNSrefinement
HKL-2000data collection
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2011-10-19 
  • Released Date: 2011-12-14 
  • Deposition Author(s): Huang, C.S., Tong, L.

Revision History 

  • Version 1.0: 2011-12-14
    Type: Initial release
  • Version 1.1: 2013-01-23
    Type: Database references, Structure summary