1HG0

X-ray structure of the complex between Erwinia chrysanthemi L-asparaginase and succinic acid


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.199 
  • R-Value Work: 0.171 
  • R-Value Observed: 0.171 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Stuctural Basis for the Activity and Substrate Specificity of Erwinia Chrysanthemi L-Asparaginase

Kolyani, K.A.Wlodawer, A.Lubkowski, J.

(2001) Biochemistry 40: 5655

  • DOI: 10.1021/bi0029595
  • Primary Citation of Related Structures:  
    1HG1, 1HG0, 1HFW

  • PubMed Abstract: 
  • Bacterial L-asparaginases, enzymes that catalyze the hydrolysis of L-asparagine to aspartic acid, have been used for over 30 years as therapeutic agents in the treatment of acute childhood lymphoblastic leukemia. Other substrates of asparaginases include L-glutamine, D-asparagine, and succinic acid monoamide ...

    Bacterial L-asparaginases, enzymes that catalyze the hydrolysis of L-asparagine to aspartic acid, have been used for over 30 years as therapeutic agents in the treatment of acute childhood lymphoblastic leukemia. Other substrates of asparaginases include L-glutamine, D-asparagine, and succinic acid monoamide. In this report, we present high-resolution crystal structures of the complexes of Erwinia chrysanthemi L-asparaginase (ErA) with the products of such reactions that also can serve as substrates, namely L-glutamic acid (L-Glu), D-aspartic acid (D-Asp), and succinic acid (Suc). Comparison of the four independent active sites within each complex indicates unique and specific binding of the ligand molecules; the mode of binding is also similar between complexes. The lack of the alpha-NH3(+) group in Suc, compared to L-Asp, does not affect the binding mode. The side chain of L-Glu, larger than that of L-Asp, causes several structural distortions in the ErA active side. The active site flexible loop (residues 15-33) does not exhibit stable conformation, resulting in suboptimal orientation of the nucleophile, Thr15. Additionally, the delta-COO(-) plane of L-Glu is approximately perpendicular to the plane of gamma-COO(-) in L-Asp bound to the asparaginase active site. Binding of D-Asp to the ErA active site is very distinctive compared to the other ligands, suggesting that the low activity of ErA against D-Asp could be mainly attributed to the low k(cat) value. A comparison of the amino acid sequence and the crystal structure of ErA with those of other bacterial L-asparaginases shows that the presence of two active-site residues, Glu63(ErA) and Ser254(ErA), may correlate with significant glutaminase activity, while their substitution by Gln and Asn, respectively, may lead to minimal L-glutaminase activity.


    Related Citations: 
    • A Left-Handed Crossover Involved in Amidohydrolase Catalysis, Crystal Structure of Erwinia Chrysanthemi L-Asparaginase with Bound L-Aspartate
      Miller, M., Rao, J.K.M., Wlodawer, A., Gribskov, M.R.
      (1993) FEBS Lett 328: 275
    • Crystal Structure of Escherichia Coli L-Asparaginase, an Enzyme Used in Cancer Therapy
      Swain, A.L., Jaskolski, M., Housset, D., Rao, J.K.M., Wlodawer, A.
      (1993) Proc Natl Acad Sci U S A 90: 1474

    Organizational Affiliation

    Macromolecular Crystallography Laboratory, National Cancer Institute at Frederick, Frederick, Maryland 21702, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
L-ASPARAGINASEA, B, C, D327Dickeya chrysanthemiMutation(s): 4 
Gene Names: ansBasn
EC: 3.5.1.1
UniProt
Find proteins for P06608 (Dickeya chrysanthemi)
Explore P06608 
Go to UniProtKB:  P06608
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SIN
Query on SIN

Download Ideal Coordinates CCD File 
E [auth A], F [auth B], G [auth C], H [auth D]SUCCINIC ACID
C4 H6 O4
KDYFGRWQOYBRFD-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.199 
  • R-Value Work: 0.171 
  • R-Value Observed: 0.171 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 107.18α = 90
b = 91.32β = 92.04
c = 128.41γ = 90
Software Package:
Software NamePurpose
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2001-08-07
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2017-09-13
    Changes: Data collection