My NCBISign In

Display Settings:

Format

Send to:

Choose Destination
    Biochemistry. 2008 Sep 23;47(38):9937-43. Epub 2008 Aug 30.

    Structural characterization of a putative endogenous metal chelator in the periplasmic nickel transporter NikA.

    Cherrier MV, Cavazza C, Bochot C, Lemaire D, Fontecilla-Camps JC.

    Source

    Laboratoire de Cristallographie et de Cristallogenese des Proteines, Institut de Biologie Structurale J.P. Ebel, CEA, CNRS, Universite J. Fourier, 41 rue J. Horowitz, 38027 Grenoble Cedex 1, France.

    Abstract

    Escherichia coli and related bacteria require nickel for the synthesis of hydrogenases, enzymes involved in hydrogen oxidation and proton reduction. Nickel transport to the cytoplasm depends on five proteins, NikA-E. We have previously reported the three-dimensional structure of the soluble periplasmic nickel transporter NikA in a complex with FeEDTA(H 2O) (-). We have now determined the structure of EDTA-free NikA and have found that it binds a small organic molecule that contributes three ligands to the coordination of a transition metal ion. Unexpectedly, His416, which was far from the metal-binding site in the FeEDTA(H 2O) (-)-NikA complex, becomes the fourth observed ligand to the metal. The best match to the omit map electron density is obtained for butane-1,2,4-tricarboxylate (BTC). Our attempts to obtain a BTC-Ni-NikA complex using apo protein and commercial reagents resulted in nickel-free BTC-NikA. Overall, our results suggest that nickel transport in vivo requires a specific metallophore that may be BTC.

    PMID:
    18759453
    [PubMed - indexed for MEDLINE]

    Publication Types, MeSH Terms, Substances, Secondary Source ID

    Publication Types

    MeSH Terms

    Substances

    Secondary Source ID

    LinkOut - more resources

    Full Text Sources

    Molecular Biology Databases

    Libraries

      Supplemental Content

      Icon for American Chemical Society

      Save items

      loading

      Related citations in PubMed

      See reviews... See all...

      Cited by 3 PubMed Central articles

      Structures reported by this article

      See all 2 structures...

      Related information

      • Related Citations
        Calculated set of PubMed citations closely related to the selected article(s) retrieved using a word weight algorithm. Related articles are displayed in ranked order from most to least relevant, with the “linked from” citation displayed first.
      • Compound (MeSH Keyword)
        PubChem chemical compound records that are classified under the same Medical Subject Headings (MeSH) controlled vocabulary as the current articles.
      • Gene
        Gene records that cite the current articles. Citations in Gene are added manually by NCBI or imported from outside public resources.
      • Gene (GeneRIF)
        Gene records that have the current articles as Reference into Function citations (GeneRIFs). NLM staff reviewing the literature while indexing MEDLINE add GeneRIFs manually.
      • Nucleotide (Weighted)
        Nucleotide records associated with the current articles through the Gene database. These are the related sequences on the Gene record that are added manually by NCBI.
      • Protein (RefSeq)
        NCBI protein Reference Sequences (RefSeqs) that are cited in the current articles, included in the corresponding Gene Reference into Function, or that include the PubMed articles as references.
      • Protein (Weighted)
        Protein records associated with the current articles through related Gene database records. These are the related sequences on the Gene record that are added manually by NCBI.
      • Protein Clusters
        Clusters of related proteins from the Protein Clusters database that cite the current articles. Sources of references in Protein Clusters include the associated Gene and Conserved Domain records as well as NCBI added citations.
      • Substance (MeSH Keyword)
        PubChem chemical substance (submitted) records that are classified under the same Medical Subject Headings (MeSH) controlled vocabulary as the current articles.
      • Taxonomy via GenBank
        Taxonomy records associated with the current articles through taxonomic information on related molecular database records (Nucleotide, Protein, Gene, SNP, Structure).
      • Domains
        Conserved Domain Database (CDD) records that cite the current articles. Citations are from the CDD source database records (PFAM, SMART).
      • Protein
        Protein translation features of primary database (GenBank) nucleotide records reported in the current articles as well as Reference Sequences (RefSeqs) that include the articles as references.
      • Structure
        Three-dimensional structure records in the NCBI Structure database for data reported in the current articles.
      • GEO Profiles
        Gene Expression Omnibus (GEO) Profiles of molecular abundance data. The current articles are references on the Gene record associated with the GEO profile.
      • Cited in PMC
        Full-text articles in the PubMed Central Database that cite the current articles.

      Recent activity

      Clear Turn Off Turn On

      Your browsing activity is empty.

      Activity recording is turned off.

      Turn recording back on

      See more...
      You are here: NCBI > Literature > PubMed
      Write to the Help Desk