Cross-linking between cytochrome c3 and flavodoxin from Desulfovibrio gigas

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Abstract

Tetraheme cytochrome c3 (13 kDa) and flavodoxin (16 kDa), are small electron transfer proteins that have been used to mimic, in vitro, part of the electron-transfer chain that operates between substract electron donors and respiratory electron acceptors partners in Desulfovibrio species. The electron transfer between these two proteins is believed to occur through the formation of a specific complex where electrostatic interaction is the main driving force. In order to obtain structural information of the pre-complex, a covalent complex between the two proteins was prepared. A water-soluble carbodiimide [EDC (1-ethyl-3(3 dimethylaminopropyl) carbodiimide hydrochloride] was used for the cross linking reaction. The reaction was optimized varying a wide number of experimental parameters such as ionic strength, protein and cross linker concentration, and utilization of different cross linkers and reaction time between the crosslinker and proteins.

Original languageEnglish
Pages (from-to)367-371
Number of pages5
JournalBiochemical And Biophysical Research Communications
Volume256
Issue number2
DOIs
Publication statusPublished - 16 Mar 1999

Keywords

  • Cross-linking
  • Cytochrome c
  • Electron transfer complexes
  • Flavodoxin

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