1HFO

The Structure of the Macrophage Migration Inhibitory Factor from Trichinella Spiralis.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.65 Å
  • R-Value Free: 0.281 
  • R-Value Work: 0.225 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Macrophage Migration Inhibitory Factor of the Parasitic Nematode Trichinella Spiralis

Tan, T.H.Edgerton, S.A.Kumari, R.Mcalister, M.S.Rowe, S.M.Nagl, S.Pearl, L.H.Selkirk, M.E.Bianco, A.E.Totty, N.F.Engwerda, C.Gray, C.A.Meyer, D.J.

(2001) Biochem.J. 357: 373


  • PubMed Abstract: 
  • cDNAs were obtained for macrophage migration-inhibitory factor (MIF)/L-dopachrome methyl ester tautomerase homologues from the parasitic nematodes Trichinella spiralis (TsMIF) and Trichuris trichiura (TtMIF). The translated sequences, which were part ...

    cDNAs were obtained for macrophage migration-inhibitory factor (MIF)/L-dopachrome methyl ester tautomerase homologues from the parasitic nematodes Trichinella spiralis (TsMIF) and Trichuris trichiura (TtMIF). The translated sequences, which were partly confirmed by sequencing of proteolytic fragments, show 42 and 44% identity respectively with human or mouse MIF, and are shorter by one C-terminal residue. Unlike vertebrate MIF and MIF homologues of filarial nematodes, neither TsMIF nor TtMIF contain cysteine residues. Soluble recombinant TsMIF, expressed in Escherichia coli showed secondary structure (by CD spectroscopy) and quaternary structure (by light-scattering and gel filtration) similar to that of the trimeric mammalian MIFs and D-dopachrome tautomerase. The catalytic specificity of recombinant TsMIF in the ketonization of phenylpyruvate (1.4x10(6) M(-1) x s(-1)) was comparable with that of human MIF, while that of p-hydroxyphenylpyruvate (9.1x10(4) M(-1) x s(-1)) was 71-fold lower. TsMIF showed high specificity in tautomerization of the methyl ester of L-dopachrome compared with non-esterified L-dopachrome (>87000-fold) and a high kcat (approximately 4x10(4) s(-1). The crystal structure, determined to 1.65 A (1 A=0.1 nm), was generally similar to that of human MIF, but differed in the boundaries of the putative active-site pocket, which can explain the low activity towards p-hydroxyphenylpyruvate. The central pore was blocked, but was continuous, with the three putative tautomerase sites. Recombinant TsMIF (5 ng/ml-5 pg/ml) inhibited migration of human peripheral-blood mononuclear cells in a manner similar to that shown by human MIF, but had no effect from 5 to 500 ng/ml on anti-CD3-stimulated murine T-cell proliferation. TsMIF was detected in supernatants of T. spiralis larvae cultured in vitro at 6 ng/ml (55 ng/mg total secreted protein). In conclusion TsMIF has structural, catalytic and cell-migration-inhibitory properties which indicate that it is partially orthologous to mammalian MIF.


    Organizational Affiliation

    Department of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, Keppel Street, London WC1E 7HT, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
MIGRATION INHIBITORY FACTOR
A, B, C, D, E, F
113Trichinella spiralisMutation(s): 0 
EC: 5.3.2.1
Find proteins for P81529 (Trichinella spiralis)
Go to UniProtKB:  P81529
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.65 Å
  • R-Value Free: 0.281 
  • R-Value Work: 0.225 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 110.128α = 90.00
b = 88.344β = 131.13
c = 86.355γ = 90.00
Software Package:
Software NamePurpose
CNSrefinement
MOSFLMdata reduction
AMoREphasing
SCALAdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2000-12-07 
  • Released Date: 2001-08-30 
  • Deposition Author(s): Roe, S.M., Meyer, D.J.

Revision History 

  • Version 1.0: 2001-08-30
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2019-04-10
    Type: Data collection, Other, Source and taxonomy