Backbone, side chain and heme resonance assignments of the triheme cytochrome PpcA from Geobacter sulfurreducens

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Abstract

Gene knock-out studies on Geobacter sulfurreducens cells showed that the periplasmic triheme cytochrome PpcA is involved in respiratory pathways leading to the extracellular reduction of Fe(III) and U(VI) oxides. The crucial role of this protein in bridging the electron transfer between the cytoplasm and cell exterior was further supported by proteomics studies. In comparison with non-heme proteins, the presence of numerous proton-containing groups in the heme groups causes additional challenges to the full protein assignment and structure calculation. Here, we report the complete assignment of the heme proton signals together with the 1H and 15N backbone and side chain assignments of the reduced form of PpcA.

Original languageEnglish
Pages (from-to)113-116
Number of pages4
JournalBiomolecular Nmr Assignments
Volume5
Issue number1
DOIs
Publication statusPublished - 1 Apr 2011

Keywords

  • Geobacter sulfurreducens
  • Multiheme
  • NMR
  • PpcA

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