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J Biol Chem. 1994 Jan 28;269(4):2895-901.

An Escherichia coli protein consisting of a domain homologous to FK506-binding proteins (FKBP) and a new metal binding motif.

Author information

  • 1Protein Engineering Group, Max-Planck-Institut für Biochemie, Martinsried, Federal Republic of Germany.

Abstract

Initially detected as a persistent contaminant in immobilized metal affinity chromatography of recombinant proteins in Escherichia coli, a 196-amino acid protein was isolated, cloned, overexpressed, and characterized. It consists of two domains, of which the first (146 amino acids) shows some homology to the FK506-binding proteins. The second domain (50 amino acids) is extremely rich in potentially metal-binding amino acids, such as histidine, cysteine, and acidic amino acids. The protein binds Ni2+ and Zn2+ tightly with 1:1 stoichiometry, Cu2+ and Co2+ with lower affinity, and Mn2+, Fe2+, Fe3+, Mg2+, and Ca2+ hardly at all.

PMID:
8300624
[PubMed - indexed for MEDLINE]
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