1DPT

D-DOPACHROME TAUTOMERASE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.54 Å
  • R-Value Free: 0.192 
  • R-Value Work: 0.164 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Crystal structure of human D-dopachrome tautomerase, a homologue of macrophage migration inhibitory factor, at 1.54 A resolution.

Sugimoto, H.Taniguchi, M.Nakagawa, A.Tanaka, I.Suzuki, M.Nishihira, J.

(1999) Biochemistry 38: 3268-3279

  • DOI: 10.1021/bi982184o

  • PubMed Abstract: 
  • D-Dopachrome tautomerase shares a low homologous amino acid sequence (33% homology) with the macrophage migration inhibitory factor (MIF) and possesses similar tautomerase activity as well. MIF is a cytokine involved in inflammatory reactions and imm ...

    D-Dopachrome tautomerase shares a low homologous amino acid sequence (33% homology) with the macrophage migration inhibitory factor (MIF) and possesses similar tautomerase activity as well. MIF is a cytokine involved in inflammatory reactions and immune responses. Whereas recent studies have identified MIF as a pituitary hormone and immunoregulator, much less is known about the structural basis of these physiological functions and the real significance of tautomerase activity. Therefore, interest in the structure-function relationship between D-dopachrome tautomerase and MIF has increased, especially with regard to inflammation and immune responses. We have determined the X-ray crystal structure of human D-dopachrome tautomerase at 1.54 A resolution. D-Dopachrome tautomerase folds to form a homotrimer that has extensive contact between subunits by intersubunit beta-sheets. Its overall topology and trimeric formations are similar to those of human MIF. The N-terminal proline is located at the bottom of a positively charged pocket in which the conformations of Lys32 and Ser63 are highly conserved. These positively charged properties are also seen in the active site pocket of human MIF, bacterial 5-(carboxymethyl)-2-hydroxymuconate isomerase (CHMI), and 4-oxalocrotonate tautomerase (4-OT). A detailed comparison of these structures revealed significant differences in the environment around the potential active site, the intersubunit contacts, and charge distribution on the molecular surface. It can be concluded that these features are related to the physiological role and tautomerase activity of MIF and D-dopachrome tautomerase. The present structural study could be helpful for designing effective inhibitors that modulate immunoregulatory and hormone-like effects.


    Related Citations: 
    • Crystallization and Preliminary X-Ray Analysis of Human D-Dopachrome Tautomerase
      Sugimoto, H.,Taniguchi, M.,Nakagawa, A.,Tanaka, I.,Suzuki, M.,Nishihira, J.
      (1997) J.Struct.Biol. 120: 105
    • Molecular Cloning of Human D-Dopachrome Tautomerase Cdna: N-Terminal Proline is Essential for Enzyme Activation
      Nishihira, J.,Fujinaga, M.,Kuriyama, T.,Suzuki, M.,Sugimoto, H.,Nakagawa, A.,Tanaka, I.,Sakai, M.
      (1998) Biochem.Biophys.Res.Commun. 243: 538


    Organizational Affiliation

    Division of Biological Sciences, Graduate School of Science, Hokkaido University, Sapporo, Japan.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
D-DOPACHROME TAUTOMERASE
A, B, C
117Homo sapiensMutation(s): 0 
Gene Names: DDT
EC: 4.1.1.84
Find proteins for P30046 (Homo sapiens)
Go to Gene View: DDT
Go to UniProtKB:  P30046
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.54 Å
  • R-Value Free: 0.192 
  • R-Value Work: 0.164 
  • Space Group: P 3
Unit Cell:
Length (Å)Angle (°)
a = 84.230α = 90.00
b = 84.230β = 90.00
c = 40.960γ = 120.00
Software Package:
Software NamePurpose
CCP4data scaling
X-PLORmodel building
DENZOdata reduction
X-PLORrefinement
X-PLORphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1999-03-30
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Derived calculations, Version format compliance
  • Version 1.3: 2018-06-06
    Type: Advisory, Data collection, Derived calculations, Other