3NOL

Crystal structure of Zymomonas mobilis Glutaminyl Cyclase (trigonal form)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.220 
  • R-Value Work: 0.178 
  • R-Value Observed: 0.180 

Starting Model: experimental
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This is version 1.3 of the entry. See complete history


Literature

Kinetic and structural characterization of bacterial glutaminyl cyclases from Zymomonas mobilis and Myxococcus xanthus

Carrillo, D.R.Parthier, C.Janckel, N.Grandke, J.Stelter, M.Schilling, S.Boehme, M.Neumann, P.Wolf, R.Demuth, H.U.Stubbs, M.T.Rahfeld, J.U.

(2010) Biol Chem 391: 1419-1428

  • DOI: https://doi.org/10.1515/BC.2010.130
  • Primary Citation of Related Structures:  
    3NOK, 3NOL, 3NOM

  • PubMed Abstract: 

    Although enzymes responsible for the cyclization of amino-terminal glutamine residues are present in both plant and mammal species, none have yet been characterized in bacteria. Based on low sequence homologies to plant glutaminyl cyclases (QCs), we cloned the coding sequences of putative microbial QCs from Zymomonas mobilis (ZmQC) and Myxococcus xanthus (MxQC). The two recombinant enzymes exhibited distinct QC activity, with specificity constants k(cat)/K(m) of 1.47±0.33 mm⁻¹ s⁻¹ (ZmQC) and 142±32.7 mm⁻¹ s⁻¹ (MxQC) towards the fluorescent substrate glutamine-7-amino-4-methyl-coumarine. The measured pH-rate profile of the second order rate constant displayed an interesting deviation towards the acidic limb of the pH chart in the case of ZmQC, whereas MxQC showed maximum activity in the mild alkaline pH range. Analysis of the enzyme variants ZmQCGlu⁴⁶Gln and MxQCGln⁴⁶Glu show that the exchanged residues play a significant role in the pH behaviour of the respective enzymes. In addition, we determined the three dimensional crystal structures of both enzymes. The tertiary structure is defined by a five-bladed β-propeller anchored by a core cation. The structures corroborate the putative location of the active site and confirm the proposed relation between bacterial and plant glutaminyl cyclases.


  • Organizational Affiliation

    Probiodrug AG, Halle/Saale, Germany.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Glutamine cyclotransferase262Zymomonas mobilis subsp. mobilis ATCC 10988Mutation(s): 0 
Gene Names: ZmobDRAFT_1643
EC: 2.3.2.5
UniProt
Find proteins for A0A0H3G2U5 (Zymomonas mobilis subsp. mobilis (strain ATCC 10988 / DSM 424 / LMG 404 / NCIMB 8938 / NRRL B-806 / ZM1))
Explore A0A0H3G2U5 
Go to UniProtKB:  A0A0H3G2U5
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA0A0H3G2U5
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.220 
  • R-Value Work: 0.178 
  • R-Value Observed: 0.180 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 61.423α = 90
b = 61.423β = 90
c = 98.8γ = 120
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALAdata scaling
PHASERphasing
REFMACrefinement
PDB_EXTRACTdata extraction
CrystalCleardata collection

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2010-11-03
    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