Crystal structure of Mycobacterium tuberculosis uracil-DNA glycosylase, Form I

Experimental Data Snapshot

  • Resolution: 0.98 Å
  • R-Value Free: 0.154 
  • R-Value Work: 0.137 
  • R-Value Observed: 0.137 

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Structural plasticity in Mycobacterium tuberculosis uracil-DNA glycosylase (MtUng) and its functional implications.

Arif, S.M.Geethanandan, K.Mishra, P.Surolia, A.Varshney, U.Vijayan, M.

(2015) Acta Crystallogr D Biol Crystallogr 71: 1514-1527

  • DOI: https://doi.org/10.1107/S1399004715009311
  • Primary Citation of Related Structures:  
    4WPK, 4WPL, 4WRU, 4WRV, 4WRW, 4WRX, 4WRY, 4WRZ, 4WS0, 4WS1, 4WS2, 4WS3, 4WS4, 4WS5, 4WS6, 4WS7, 4WS8

  • PubMed Abstract: 

    17 independent crystal structures of family I uracil-DNA glycosylase from Mycobacterium tuberculosis (MtUng) and its complexes with uracil and its derivatives, distributed among five distinct crystal forms, have been determined. Thermodynamic parameters of binding in the complexes have been measured using isothermal titration calorimetry. The two-domain protein exhibits open and closed conformations, suggesting that the closure of the domain on DNA binding involves conformational selection. Segmental mobility in the enzyme molecule is confined to a 32-residue stretch which plays a major role in DNA binding. Uracil and its derivatives can bind to the protein in two possible orientations. Only one of them is possible when there is a bulky substituent at the 5' position. The crystal structures of the complexes provide a reasonable rationale for the observed thermodynamic parameters. In addition to providing fresh insights into the structure, plasticity and interactions of the protein molecule, the results of the present investigation provide a platform for structure-based inhibitor design.

  • Organizational Affiliation

    Molecular Biophysics Unit, Indian Institute of Science, Bangalore 560 012, India.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Uracil-DNA glycosylase238Mycobacterium tuberculosis H37RvMutation(s): 0 
Gene Names: ungRv2976cMTCY349.11
Find proteins for P9WFQ9 (Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv))
Explore P9WFQ9 
Go to UniProtKB:  P9WFQ9
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP9WFQ9
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 0.98 Å
  • R-Value Free: 0.154 
  • R-Value Work: 0.137 
  • R-Value Observed: 0.137 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 38.919α = 90
b = 63.473β = 112.89
c = 45.186γ = 90
Software Package:
Software NamePurpose

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2015-07-15
    Type: Initial release
  • Version 1.1: 2023-11-08
    Changes: Data collection, Database references, Derived calculations, Other, Refinement description, Source and taxonomy