3RMZ

Crystal Structure of the W199F-MauG/pre-Methylamine Dehydrogenase Complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.72 Å
  • R-Value Free: 0.181 
  • R-Value Work: 0.138 
  • R-Value Observed: 0.141 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Mutagenesis of tryptophan199 suggests that hopping is required for MauG-dependent tryptophan tryptophylquinone biosynthesis.

Tarboush, N.A.Jensen, L.M.Yukl, E.T.Geng, J.Liu, A.Wilmot, C.M.Davidson, V.L.

(2011) Proc Natl Acad Sci U S A 108: 16956-16961

  • DOI: 10.1073/pnas.1109423108
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • The diheme enzyme MauG catalyzes the posttranslational modification of the precursor protein of methylamine dehydrogenase (preMADH) to complete biosynthesis of its protein-derived tryptophan tryptophylquinone (TTQ) cofactor. Catalysis proceeds throug ...

    The diheme enzyme MauG catalyzes the posttranslational modification of the precursor protein of methylamine dehydrogenase (preMADH) to complete biosynthesis of its protein-derived tryptophan tryptophylquinone (TTQ) cofactor. Catalysis proceeds through a high valent bis-Fe(IV) redox state and requires long-range electron transfer (ET), as the distance between the modified residues of preMADH and the nearest heme iron of MauG is 19.4 Å. Trp199 of MauG resides at the MauG-preMADH interface, positioned midway between the residues that are modified and the nearest heme. W199F and W199K mutations did not affect the spectroscopic and redox properties of MauG, or its ability to stabilize the bis-Fe(IV) state. Crystal structures of complexes of W199F/K MauG with preMADH showed no significant perturbation of the MauG-preMADH structure or protein interface. However, neither MauG variant was able to synthesize TTQ from preMADH. In contrast, an ET reaction from diferrous MauG to quinone MADH, which does not require the bis-Fe(IV) intermediate, was minimally affected by the W199F/K mutations. W199F/K MauGs were able to oxidize quinol MADH to form TTQ, the putative final two-electron oxidation of the biosynthetic process, but with k(cat)/K(m) values approximately 10% that of wild-type MauG. The differential effects of the W199F/K mutations on these three different reactions are explained by a critical role for Trp199 in mediating multistep hopping from preMADH to bis-Fe(IV) MauG during the long-range ET that is required for TTQ biosynthesis.


    Organizational Affiliation

    Department of Biochemistry, University of Mississippi Medical Center, Jackson, MS 39216, USA.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Methylamine utilization protein MauGA, B373Paracoccus denitrificans PD1222Mutation(s): 1 
Gene Names: mauGPden_4736
EC: 1
Find proteins for Q51658 (Paracoccus denitrificans (strain Pd 1222))
Explore Q51658 
Go to UniProtKB:  Q51658
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  • Reference Sequence

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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Methylamine dehydrogenase light chainC, E137Paracoccus denitrificans PD1222Mutation(s): 0 
Gene Names: Pden_4733
EC: 1.4.99.3 (PDB Primary Data), 1.4.9.1 (UniProt)
Find proteins for P22619 (Paracoccus denitrificans)
Explore P22619 
Go to UniProtKB:  P22619
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  • Reference Sequence

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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Methylamine dehydrogenase heavy chainD, F386Paracoccus denitrificans PD1222Mutation(s): 0 
Gene Names: Pden_4730
EC: 1.4.99.3 (PDB Primary Data), 1.4.9.1 (UniProt)
Find proteins for A1BB97 (Paracoccus denitrificans (strain Pd 1222))
Explore A1BB97 
Go to UniProtKB:  A1BB97
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 9 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
HEC
Query on HEC

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A, B
HEME C
C34 H34 Fe N4 O4
HXQIYSLZKNYNMH-LJNAALQVSA-N
 Ligand Interaction
P6G
Query on P6G

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F
HEXAETHYLENE GLYCOL
C12 H26 O7
IIRDTKBZINWQAW-UHFFFAOYSA-N
 Ligand Interaction
MES
Query on MES

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F
2-(N-MORPHOLINO)-ETHANESULFONIC ACID
C6 H13 N O4 S
SXGZJKUKBWWHRA-UHFFFAOYSA-N
 Ligand Interaction
PG4
Query on PG4

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F
TETRAETHYLENE GLYCOL
C8 H18 O5
UWHCKJMYHZGTIT-UHFFFAOYSA-N
 Ligand Interaction
PEG
Query on PEG

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D
DI(HYDROXYETHYL)ETHER
C4 H10 O3
MTHSVFCYNBDYFN-UHFFFAOYSA-N
 Ligand Interaction
EDO
Query on EDO

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A, B
1,2-ETHANEDIOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
ACT
Query on ACT

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D
ACETATE ION
C2 H3 O2
QTBSBXVTEAMEQO-UHFFFAOYSA-M
 Ligand Interaction
CA
Query on CA

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A, B
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
NA
Query on NA

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A, B
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
0AF
Query on 0AF
C,EL-PEPTIDE LINKINGC11 H12 N2 O3TRP
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.72 Å
  • R-Value Free: 0.181 
  • R-Value Work: 0.138 
  • R-Value Observed: 0.141 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 55.527α = 109.94
b = 83.524β = 91.54
c = 107.782γ = 105.78
Software Package:
Software NamePurpose
Blu-Icedata collection
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling
REFMACphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-10-05
    Type: Initial release
  • Version 1.1: 2011-10-19
    Changes: Database references
  • Version 1.2: 2011-10-26
    Changes: Database references