3C75

Paracoccus versutus methylamine dehydrogenase in complex with amicyanin


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.283 
  • R-Value Work: 0.235 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural comparison of crystal and solution states of the 138 kDa complex of methylamine dehydrogenase and amicyanin from Paracoccus versutus.

Cavalieri, C.Biermann, N.Vlasie, M.D.Einsle, O.Merli, A.Ferrari, D.Rossi, G.L.Ubbink, M.

(2008) Biochemistry 47: 6560-6570

  • DOI: 10.1021/bi7023749

  • PubMed Abstract: 
  • Methylamine can be used as the sole carbon source of certain methylotrophic bacteria. Methylamine dehydrogenase catalyzes the conversion of methylamine into formaldehyde and donates electrons to the electron transfer protein amicyanin. The crystal st ...

    Methylamine can be used as the sole carbon source of certain methylotrophic bacteria. Methylamine dehydrogenase catalyzes the conversion of methylamine into formaldehyde and donates electrons to the electron transfer protein amicyanin. The crystal structure of the complex of methylamine dehydrogenase and amicyanin from Paracoccus versutus has been determined, and the rate of electron transfer from the tryptophan tryptophylquinone cofactor of methylamine dehydrogenase to the copper ion of amicyanin in solution has been determined. In the presence of monovalent ions, the rate of electron transfer from the methylamine-reduced TTQ is much higher than in their absence. In general, the kinetics are similar to those observed for the system from Paracoccus denitrificans. The complex in solution has been studied using nuclear magnetic resonance. Signals of perdeuterated, (15)N-enriched amicyanin bound to methylamine dehydrogenase are observed. Chemical shift perturbation analysis indicates that the dissociation rate constant is approximately 250 s(-1) and that amicyanin assumes a well-defined position in the complex in solution. The most affected residues are in the interface observed in the crystal structure, whereas smaller chemical shift changes extend to deep inside the protein. These perturbations can be correlated to small differences in the hydrogen bond network observed in the crystal structures of free and bound amicyanin. This study indicates that chemical shift changes can be used as reliable indicators of subtle structural changes even in a complex larger than 100 kDa.


    Organizational Affiliation

    Department of Biochemistry and Molecular Biology, University of Parma, 43100 Parma, Italy.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Methylamine dehydrogenase heavy chain
H, J
426Paracoccus versutusMutation(s): 0 
Gene Names: mauB (madA)
EC: 1.4.9.1
Find proteins for P23006 (Paracoccus versutus)
Go to UniProtKB:  P23006
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Methylamine dehydrogenase light chain
L, M
188Paracoccus versutusMutation(s): 0 
Gene Names: mauA (madB)
EC: 1.4.9.1
Find proteins for P22641 (Paracoccus versutus)
Go to UniProtKB:  P22641
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Amicyanin
A, B
132Paracoccus versutusMutation(s): 0 
Gene Names: mauC (ami)
Find proteins for P22365 (Paracoccus versutus)
Go to UniProtKB:  P22365
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CU
Query on CU

Download SDF File 
Download CCD File 
A, B
COPPER (II) ION
Cu
JPVYNHNXODAKFH-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
TRQ
Query on TRQ
L, M
L-PEPTIDE LINKINGC11 H10 N2 O4TRP
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.283 
  • R-Value Work: 0.235 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 55.573α = 90.00
b = 131.038β = 90.00
c = 171.689γ = 90.00
Software Package:
Software NamePurpose
AMoREphasing
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling
MAR345dtbdata collection

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-12-30
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance