Crystal structure of E. coli NADP dependent enzyme

Experimental Data Snapshot

  • Resolution: 2.30 Å
  • R-Value Free: 0.213 
  • R-Value Work: 0.168 
  • R-Value Observed: 0.170 

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The X-ray crystal structure of Escherichia coli succinic semialdehyde dehydrogenase; structural insights into NADP+/enzyme interactions.

Langendorf, C.G.Key, T.L.Fenalti, G.Kan, W.T.Buckle, A.M.Caradoc-Davies, T.Tuck, K.L.Law, R.H.Whisstock, J.C.

(2010) PLoS One 5: e9280-e9280

  • DOI: https://doi.org/10.1371/journal.pone.0009280
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    In mammals succinic semialdehyde dehydrogenase (SSADH) plays an essential role in the metabolism of the inhibitory neurotransmitter gamma-aminobutyric acid (GABA) to succinic acid (SA). Deficiency of SSADH in humans results in elevated levels of GABA and gamma-Hydroxybutyric acid (GHB), which leads to psychomotor retardation, muscular hypotonia, non-progressive ataxia and seizures. In Escherichia coli, two genetically distinct forms of SSADHs had been described that are essential for preventing accumulation of toxic levels of succinic semialdehyde (SSA) in cells.

  • Organizational Affiliation

    Department of Biochemistry and Molecular Biology, Monash University, Clayton Campus, Melbourne, Victoria, Australia.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Succinate-semialdehyde dehydrogenase [NADP+]
A, B, C, D
481Escherichia coliMutation(s): 0 
Gene Names: b2661gabDJW2636NA
EC: (PDB Primary Data), (UniProt), 1.2.1 (UniProt)
Find proteins for P25526 (Escherichia coli (strain K12))
Explore P25526 
Go to UniProtKB:  P25526
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP25526
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.30 Å
  • R-Value Free: 0.213 
  • R-Value Work: 0.168 
  • R-Value Observed: 0.170 
  • Space Group: P 4 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 151.885α = 90
b = 151.885β = 90
c = 165.772γ = 90
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALAdata scaling
PDB_EXTRACTdata extraction

Structure Validation

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Ligand Structure Quality Assessment 

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2010-03-16
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Advisory, Version format compliance