Crystal structure of Pseudomonas aeruginosa guanidinopropionase complexed with 1,6-diaminohexane

Experimental Data Snapshot

  • Resolution: 2.50 Å
  • R-Value Free: 0.227 
  • R-Value Work: 0.191 
  • R-Value Observed: 0.193 

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Crystal structures of Pseudomonas aeruginosa guanidinobutyrase and guanidinopropionase, members of the ureohydrolase superfamily

Lee, S.J.Kim, D.J.Kim, H.S.Lee, B.I.Yoon, H.J.Yoon, J.Y.Kim, K.H.Jang, J.Y.Im, H.N.An, D.R.Song, J.S.Kim, H.J.Suh, S.W.

(2011) J Struct Biol 175: 329-338

  • DOI: https://doi.org/10.1016/j.jsb.2011.05.002
  • Primary Citation of Related Structures:  
    3NIO, 3NIP, 3NIQ

  • PubMed Abstract: 

    Pseudomonas aeruginosa guanidinobutyrase (GbuA) and guanidinopropionase (GpuA) catalyze the hydrolysis of 4-guanidinobutyrate and 3-guanidinopropionate, respectively. They belong to the ureohydrolase superfamily, which includes arginase, agmatinase, proclavaminate amidinohydrolase, and formiminoglutamase. In this study, we have determined the crystal structures of GbuA and GpuA from P. aeruginosa to provide a structural insight into their substrate specificity. Although GbuA and GpuA share a common structural fold of the typical ureohydrolase superfamily, they exhibit significant variations in two active site loops. Mutagenesis of Met161 of GbuA and Tyr157 of GpuA, both of which are located in the active site loop 1 and predicted to be involved in substrate recognition, significantly affected their enzymatic properties, implying their important roles in catalysis.

  • Organizational Affiliation

    Department of Chemistry, College of Natural Sciences, Seoul National University, Seoul 151-742, Republic of Korea.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B, C, D, E
A, B, C, D, E, F
326Pseudomonas aeruginosa PAO1Mutation(s): 0 
Gene Names: gpuAPA0288
Find proteins for Q9I6K2 (Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1))
Explore Q9I6K2 
Go to UniProtKB:  Q9I6K2
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9I6K2
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.50 Å
  • R-Value Free: 0.227 
  • R-Value Work: 0.191 
  • R-Value Observed: 0.193 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 264.748α = 90
b = 134.719β = 104.37
c = 87.785γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2011-06-01
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2014-02-26
    Changes: Database references
  • Version 1.3: 2023-11-01
    Changes: Data collection, Database references, Derived calculations, Refinement description