3HSK

Crystal Structure of Aspartate Semialdehyde Dehydrogenase with NADP from Candida albicans


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.279 
  • R-Value Work: 0.225 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Expansion of the aspartate beta-semialdehyde dehydrogenase family: the first structure of a fungal ortholog.

Arachea, B.T.Liu, X.Pavlovsky, A.G.Viola, R.E.

(2010) Acta Crystallogr.,Sect.D 66: 205-212

  • DOI: 10.1107/S0907444909052834

  • PubMed Abstract: 
  • The enzyme aspartate semialdehyde dehydrogenase (ASADH) catalyzes a critical transformation that produces the first branch-point intermediate in an essential microbial amino-acid biosynthetic pathway. The first structure of an ASADH isolated from a f ...

    The enzyme aspartate semialdehyde dehydrogenase (ASADH) catalyzes a critical transformation that produces the first branch-point intermediate in an essential microbial amino-acid biosynthetic pathway. The first structure of an ASADH isolated from a fungal species (Candida albicans) has been determined as a complex with its pyridine nucleotide cofactor. This enzyme is a functional dimer, with a similar overall fold and domain organization to the structurally characterized bacterial ASADHs. However, there are differences in the secondary-structural elements and in cofactor binding that are likely to cause the lower catalytic efficiency of this fungal enzyme. Alterations in the dimer interface, through deletion of a helical subdomain and replacement of amino acids that participate in a hydrogen-bonding network, interrupt the intersubunit-communication channels required to support an alternating-site catalytic mechanism. The detailed functional information derived from this new structure will allow an assessment of ASADH as a possible target for antifungal drug development.


    Organizational Affiliation

    Department of Chemistry, University of Toledo, Toledo, Ohio 43606, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Aspartate-semialdehyde dehydrogenase
A, B
381Candida albicans (strain SC5314 / ATCC MYA-2876)Mutation(s): 0 
Gene Names: HOM2
Find proteins for Q5ALM0 (Candida albicans (strain SC5314 / ATCC MYA-2876))
Go to UniProtKB:  Q5ALM0
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NAP
Query on NAP

Download SDF File 
Download CCD File 
A
NADP NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE
2'-MONOPHOSPHOADENOSINE 5'-DIPHOSPHORIBOSE
C21 H28 N7 O17 P3
XJLXINKUBYWONI-NNYOXOHSSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.279 
  • R-Value Work: 0.225 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 93.412α = 90.00
b = 152.180β = 90.00
c = 97.762γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
SCALEPACKdata scaling
HKL-2000data reduction
PDB_EXTRACTdata extraction
HKL-2000data collection
PHASERphasing
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-02-02
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2013-03-27
    Type: Database references
  • Version 1.3: 2017-11-01
    Type: Advisory, Refinement description