2AH0

Crystal structure of the carbinolamine intermediate in the reductive half-reaction of aromatic amine dehydrogenase (AADH) with tryptamine. Monoclinic form


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.45 Å
  • R-Value Free: 0.200 
  • R-Value Work: 0.167 
  • R-Value Observed: 0.169 

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This is version 1.2 of the entry. See complete history


Literature

Atomic description of an enzyme reaction dominated by proton tunneling

Masgrau, L.Roujeinikova, A.Johannissen, L.O.Hothi, P.Basran, J.Ranaghan, K.E.Mulholland, A.J.Sutcliffe, M.J.Scrutton, N.S.Leys, D.

(2006) Science 312: 237-241

  • DOI: https://doi.org/10.1126/science.1126002
  • Primary Citation of Related Structures:  
    2AGL, 2AGW, 2AGX, 2AGY, 2AGZ, 2AH0, 2AH1

  • PubMed Abstract: 

    We present an atomic-level description of the reaction chemistry of an enzyme-catalyzed reaction dominated by proton tunneling. By solving structures of reaction intermediates at near-atomic resolution, we have identified the reaction pathway for tryptamine oxidation by aromatic amine dehydrogenase. Combining experiment and computer simulation, we show proton transfer occurs predominantly to oxygen O2 of Asp(128)beta in a reaction dominated by tunneling over approximately 0.6 angstroms. The role of long-range coupled motions in promoting tunneling is controversial. We show that, in this enzyme system, tunneling is promoted by a short-range motion modulating proton-acceptor distance and no long-range coupled motion is required.


  • Organizational Affiliation

    Manchester Interdisciplinary Biocentre, University of Manchester, Jackson's Mill, Post Office Box 88, Manchester M60 1QD, UK.


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Aromatic amine dehydrogenaseA [auth D],
B [auth H]
135Alcaligenes faecalisMutation(s): 0 
EC: 1.4.99.4 (PDB Primary Data), 1.4.9.2 (UniProt)
UniProt
Find proteins for P84887 (Alcaligenes faecalis)
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Go to UniProtKB:  P84887
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP84887
Sequence Annotations
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Aromatic amine dehydrogenaseC [auth A],
D [auth B]
361Alcaligenes faecalisMutation(s): 0 
EC: 1.4.99.4 (PDB Primary Data), 1.4.9.2 (UniProt)
UniProt
Find proteins for P84888 (Alcaligenes faecalis)
Explore P84888 
Go to UniProtKB:  P84888
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP84888
Sequence Annotations
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  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChains TypeFormula2D DiagramParent
TRQ
Query on TRQ
A [auth D],
B [auth H]
L-PEPTIDE LINKINGC11 H10 N2 O4TRP
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.45 Å
  • R-Value Free: 0.200 
  • R-Value Work: 0.167 
  • R-Value Observed: 0.169 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 70.717α = 90
b = 89.66β = 90.41
c = 80.823γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
PDB_EXTRACTdata extraction
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Revision History  (Full details and data files)

  • Version 1.0: 2006-04-25
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance