3GIQ

Crystal structure of N-acyl-D-Glutamate Deacylase from Bordetella Bronchiseptica complexed with zinc and phosphonate inhibitor, a mimic of the reaction tetrahedral intermediate.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.207 
  • R-Value Work: 0.183 
  • R-Value Observed: 0.183 

Starting Model: experimental
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Literature

Annotating enzymes of uncertain function: the deacylation of D-amino acids by members of the amidohydrolase superfamily.

Cummings, J.A.Fedorov, A.A.Xu, C.Brown, S.Fedorov, E.Babbitt, P.C.Almo, S.C.Raushel, F.M.

(2009) Biochemistry 48: 6469-6481

  • DOI: https://doi.org/10.1021/bi900661b
  • Primary Citation of Related Structures:  
    3GIP, 3GIQ

  • PubMed Abstract: 

    The catalytic activities of three members of the amidohydrolase superfamily were discovered using amino acid substrate libraries. Bb3285 from Bordetella bronchiseptica, Gox1177 from Gluconobacter oxidans, and Sco4986 from Streptomyces coelicolor are currently annotated as d-aminoacylases or N-acetyl-d-glutamate deacetylases. These three enzymes are 22-34% identical to one another in amino acid sequence. Substrate libraries containing nearly all combinations of N-formyl-d-Xaa, N-acetyl-d-Xaa, N-succinyl-d-Xaa, and l-Xaa-d-Xaa were used to establish the substrate profiles for these enzymes. It was demonstrated that Bb3285 is restricted to the hydrolysis of N-acyl-substituted derivatives of d-glutamate. The best substrates for this enzyme are N-formyl-d-glutamate (k(cat)/K(m) = 5.8 x 10(6) M(-1) s(-1)), N-acetyl-d-glutamate (k(cat)/K(m) = 5.2 x 10(6) M(-1) s(-1)), and l-methionine-d-glutamate (k(cat)/K(m) = 3.4 x 10(5) M(-1) s(-1)). Gox1177 and Sco4986 preferentially hydrolyze N-acyl-substituted derivatives of hydrophobic d-amino acids. The best substrates for Gox1177 are N-acetyl-d-leucine (k(cat)/K(m) = 3.2 x 10(4) M(-1) s(-1)), N-acetyl-d-tryptophan (k(cat)/K(m) = 4.1 x 10(4) M(-1) s(-1)), and l-tyrosine-d-leucine (k(cat)/K(m) = 1.5 x 10(4) M(-1) s(-1)). A fourth protein, Bb2785 from B. bronchiseptica, did not have d-aminoacylase activity. The best substrates for Sco4986 are N-acetyl-d-phenylalanine and N-acetyl-d-tryptophan. The three-dimensional structures of Bb3285 in the presence of the product acetate or a potent mimic of the tetrahedral intermediate were determined by X-ray diffraction methods. The side chain of the d-glutamate moiety of the inhibitor is ion-paired to Arg-295, while the alpha-carboxylate is ion-paired with Lys-250 and Arg-376. These results have revealed the chemical and structural determinants for substrate specificity in this protein. Bioinformatic analyses of an additional approximately 250 sequences identified as members of this group suggest that there are no simple motifs that allow prediction of substrate specificity for most of these unknowns, highlighting the challenges for computational annotation of some groups of homologous proteins.


  • Organizational Affiliation

    Department of Chemistry, P.O. Box 30012, Texas A&M University, College Station, Texas 77842-3012, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
N-acyl-D-glutamate deacylase
A, B
480Bordetella bronchisepticaMutation(s): 0 
Gene Names: BB3285
EC: 3.5.1.82
UniProt
Find proteins for A0A0H3LXD5 (Bordetella bronchiseptica (strain ATCC BAA-588 / NCTC 13252 / RB50))
Explore A0A0H3LXD5 
Go to UniProtKB:  A0A0H3LXD5
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA0A0H3LXD5
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.207 
  • R-Value Work: 0.183 
  • R-Value Observed: 0.183 
  • Space Group: P 61 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 91.291α = 90
b = 91.291β = 90
c = 507.584γ = 120
Software Package:
Software NamePurpose
ADSCdata collection
BALBESphasing
CNSrefinement
DENZOdata reduction
SCALEPACKdata 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: 2009-09-01
    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