3M6I

L-arabinitol 4-dehydrogenase


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.266 
  • R-Value Work: 0.209 
  • R-Value Observed: 0.211 

Starting Model: experimental
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Ligand Structure Quality Assessment 


This is version 1.2 of the entry. See complete history


Literature

Structure and engineering of L-arabinitol 4-dehydrogenase from Neurospora crassa

Bae, B.Sullivan, R.P.Zhao, H.Nair, S.K.

(2010) J Mol Biol 402: 230-240

  • DOI: https://doi.org/10.1016/j.jmb.2010.07.033
  • Primary Citation of Related Structures:  
    3M6I

  • PubMed Abstract: 

    L-arabinitol 4-dehydrogenase (LAD) catalyzes the conversion of l-arabinitol into l-xylulose with concomitant NAD(+) reduction. It is an essential enzyme in the development of recombinant organisms that convert l-arabinose into fuels and chemicals using the fungal l-arabinose catabolic pathway. Here we report the crystal structure of LAD from the filamentous fungus Neurospora crassa at 2.6 A resolution. In addition, we created a number of site-directed variants of N. crassa LAD that are capable of utilizing NADP(+) as cofactor, yielding the first example of LAD with an almost completely switched cofactor specificity. This work represents the first structural data on any LAD and provides a molecular basis for understanding the existing literature on the substrate specificity and cofactor specificity of this enzyme. The engineered LAD mutants with altered cofactor specificity should be useful for applications in industrial biotechnology.


  • Organizational Affiliation

    Department of Biochemistry, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
L-arabinitol 4-dehydrogenase
A, B
363Neurospora crassaMutation(s): 0 
Gene Names: NCU00643NCU00643.1
EC: 1.1.1.12
UniProt
Find proteins for Q7SI09 (Neurospora crassa (strain ATCC 24698 / 74-OR23-1A / CBS 708.71 / DSM 1257 / FGSC 987))
Explore Q7SI09 
Go to UniProtKB:  Q7SI09
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ7SI09
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.266 
  • R-Value Work: 0.209 
  • R-Value Observed: 0.211 
  • Space Group: P 64 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 134.52α = 90
b = 134.52β = 90
c = 224.34γ = 120
Software Package:
Software NamePurpose
MAR345dtbdata collection
PHASERphasing
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2010-07-21
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2023-09-06
    Changes: Data collection, Database references, Derived calculations, Refinement description