1B50

NMR STRUCTURE OF HUMAN MIP-1A D26A, 10 STRUCTURES


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 30 
  • Conformers Submitted: 10 
  • Selection Criteria: CONVERGED LOW ENERGY 'PLATEAU' OF ENERGY DISTRIBUTION 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Identification of amino acid residues critical for aggregation of human CC chemokines macrophage inflammatory protein (MIP)-1alpha, MIP-1beta, and RANTES. Characterization of active disaggregated chemokine variants.

Czaplewski, L.G.McKeating, J.Craven, C.J.Higgins, L.D.Appay, V.Brown, A.Dudgeon, T.Howard, L.A.Meyers, T.Owen, J.Palan, S.R.Tan, P.Wilson, G.Woods, N.R.Heyworth, C.M.Lord, B.I.Brotherton, D.Christison, R.Craig, S.Cribbes, S.Edwards, R.M.Evans, S.J.Gilbert, R.Morgan, P.Randle, E.Schofield, N.Varley, P.G.Fisher, J.Waltho, J.P.Hunter, M.G.

(1999) J.Biol.Chem. 274: 16077-16084

  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Human CC chemokines macrophage inflammatory protein (MIP)-1alpha, MIP-1beta, and RANTES (regulated on activation normal T cell expressed) self-associate to form high-molecular mass aggregates. To explore the biological significance of chemokine aggre ...

    Human CC chemokines macrophage inflammatory protein (MIP)-1alpha, MIP-1beta, and RANTES (regulated on activation normal T cell expressed) self-associate to form high-molecular mass aggregates. To explore the biological significance of chemokine aggregation, nonaggregating variants were sought. The phenotypes of 105 hMIP-1alpha variants generated by systematic mutagenesis and expression in yeast were determined. hMIP-1alpha residues Asp26 and Glu66 were critical to the self-association process. Substitution at either residue resulted in the formation of essentially homogenous tetramers at 0.5 mg/ml. Substitution of identical or analogous residues in homologous positions in both hMIP-1beta and RANTES demonstrated that they were also critical to aggregation. Our analysis suggests that a single charged residue at either position 26 or 66 is insufficient to support extensive aggregation and that two charged residues must be present. Solution of the three-dimensional NMR structure of hMIP-1alpha has enabled comparison of these residues in hMIP-1beta and RANTES. Aggregated and disaggregated forms of hMIP-1alpha, hMIP-1beta, and RANTES generally have equivalent G-protein-coupled receptor-mediated biological potencies. We have therefore generated novel reagents to evaluate the role of hMIP-1alpha, hMIP-1beta, and RANTES aggregation in vitro and in vivo. The disaggregated chemokines retained their human immunodeficiency virus (HIV) inhibitory activities. Surprisingly, high concentrations of RANTES, but not disaggregated RANTES variants, enhanced infection of cells by both M- and T-tropic HIV isolates/strains. This observation has important implications for potential therapeutic uses of chemokines implying that disaggregated forms may be necessary for safe clinical investigation.


    Organizational Affiliation

    British Biotech Pharmaceuticals Ltd., Watlington Road, Oxford OX4 5LY, United Kingdom. czaplewski@britbio.co.uk




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
MIP-1A
A, B
69Homo sapiensMutation(s): 1 
Gene Names: CCL3 (G0S19-1, MIP1A, SCYA3)
Find proteins for P10147 (Homo sapiens)
Go to Gene View: CCL3
Go to UniProtKB:  P10147
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 30 
  • Conformers Submitted: 10 
  • Selection Criteria: CONVERGED LOW ENERGY 'PLATEAU' OF ENERGY DISTRIBUTION 
  • Olderado: 1B50 Olderado
Software Package:
Software NamePurpose
X-PLORphasing
X-PLORmodel building
X-PLORrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1999-07-22
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2012-02-22
    Type: Database references