1MUT

NMR STUDY OF MUTT ENZYME, A NUCLEOSIDE TRIPHOSPHATE PYROPHOSPHOHYDROLASE


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Submitted: 15 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Solution structure of the MutT enzyme, a nucleoside triphosphate pyrophosphohydrolase.

Abeygunawardana, C.Weber, D.J.Gittis, A.G.Frick, D.N.Lin, J.Miller, A.F.Bessman, M.J.Mildvan, A.S.

(1995) Biochemistry 34: 14997-15005


  • PubMed Abstract: 
  • The MutT enzyme (129 residues) catalyzes the hydrolysis of normal and mutagenic nucleoside triphosphates, such as 8-oxo-dGTP, by substitution at the rarely attacked beta-P, to yield NMP and pyrophosphate. Previous heteronuclear NMR studies of MutT ha ...

    The MutT enzyme (129 residues) catalyzes the hydrolysis of normal and mutagenic nucleoside triphosphates, such as 8-oxo-dGTP, by substitution at the rarely attacked beta-P, to yield NMP and pyrophosphate. Previous heteronuclear NMR studies of MutT have shown the secondary structure to consist of a five-stranded mixed beta-sheet connected by the loop I-alpha-helix I--loop II motif, by two tight turns, and by loop III, and terminated by loop IV--alpha-helix II [Abeygunawardana et al. (1993) Biochemistry 32, 13071-13080; Weber et al. (1993) Biochemistry 32, 13081-13087). Complete side-chain assignments of 1H and 13C resonances have now been made by 3D C(CO)NH and HCCH-TOCSY experiments. A total of 1461 interproton proximities (11 per residue), obtained by 3D 15N-resolved NOESY-HSQC and 3D 13C-resolved NOESY-HSQC spectra, including 372 long-range NOEs, as well as 65 dihedral angle (phi) restraints and 34 backbone hydrogen bond restraints were used to determine the tertiary structure of MutT by distance geometry, simulated annealing, and energy minimization with the program X-PLOR. The structure is globular and compact with the parallel portion of the beta-sheet sandwiched between the two alpha-helices, forming an alpha+beta fold. The essential divalent cation has previously been shown to bind near residues Gly-37, Gly-38, Lys-39, and Glu-57, and nucleotides have been shown to bind near residues Leu-54 and Val-58 by NMR relaxation methods [Frick et al. (1995) Biochemistry 34, 5577-5586].(ABSTRACT TRUNCATED AT 250 WORDS)


    Related Citations: 
    • Secondary Structure of the Mutt Enzyme as Determined by NMR
      Weber, D.J.,Abeygunawardana, C.,Bessman, M.J.,Mildvan, A.S.
      (1993) Biochemistry 32: 13081


    Organizational Affiliation

    Department of Biological Chemistry, Johns Hopkins School of Medicine, Baltimore, Maryland 21205-2185, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
NUCLEOSIDE TRIPHOSPHATE PYROPHOSPHOHYDROLASE
A
129Escherichia coli (strain K12)Gene Names: mutT
EC: 3.6.1.55
Find proteins for P08337 (Escherichia coli (strain K12))
Go to UniProtKB:  P08337
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Submitted: 15 
  • Olderado: 1MUT Olderado
Software Package:
Software NamePurpose
X-PLORrefinement
X-PLORphasing
X-PLORmodel building

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1996-04-03
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance