Modular Broad-Host-Range Expression Vectors for Single-Protein and Protein Complex Purification

Barna D. Fodor, Ákos T. Kovács, Róbert Csáki, Éva Hunyadi-Gulyás, Éva Klement, Gergely Maróti, Lívia S. Mészáros, Katalin F. Medzihradszky, Gábor Rákhely, Kornél L. Kovács

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29 Citations (Scopus)


A set of modular broad-host-range expression vectors with various affinity tags (six-His-tag, FLAG-tag, Strep-tag II, T7-tag) was created. The complete nucleotide sequences of the vectors are known, and these small vectors can be mobilized by conjugation. They are useful in the purification of proteins and protein complexes from gram-negative bacterial species. The plasmids were easily customized for Thiocapsa roseopersicina, Rhodobacter capsulatus, and Methylococcus capsulatus by inserting an appropriate promoter. These examples demonstrate the versatility and flexibility of the vectors. The constructs harbor the T7 promoter for easy overproduction of the desired protein in an appropriate Escherichia coli host. The vectors were useful in purifying different proteins from T. roseopersicina. The FLAG-tag-Strep-tag II combination was utilized for isolation of the HynL-HypC2 protein complex involved in hydrogenase maturation. These tools should be useful for protein purification and for studying protein-protein interactions in a range of bacterial species.

Original languageEnglish
Pages (from-to)712-721
Number of pages10
JournalApplied and environmental microbiology
Issue number2
Publication statusPublished - Feb 1 2004


ASJC Scopus subject areas

  • Biotechnology
  • Food Science
  • Applied Microbiology and Biotechnology
  • Ecology

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