2D-isolation of pure plasma and thylakoid membranes from the cyanobacterium Synechocystis sp. PCC 6803

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Abstract

Aqueous polymer two-phase partitioning in combination with sucrose density centrifugation offered, for the first time, a 2D-separation method for the isolation of pure plasma and thylakoid membranes from the cyanobacterium Synechocystis 6803 without any cross-contaminations. The purity of the membrane fractions was verified by immunoblot analysis using antibodies against membrane-specific marker proteins. As an initiation of a proteomics project, two prominent proteins, which were observed only in the plasma membrane (Slr1513, a hypothetical protein, and HofG, a general secretion pathway protein), or in the thylakoid membrane (PsaE, a photosystem I protein, and NdhH, a subunit of NADH dehydrogenase), were identified. Copyright (C) 1998 Federation of European Biochemical Societies.

Original languageEnglish
Pages (from-to)189-192
Number of pages4
JournalFEBS Letters
Volume436
Issue number2
DOIs
StatePublished - Oct 2 1998

Keywords

  • Cyanobacterium
  • Membrane protein
  • Phase partitioning
  • Proteomics
  • Synechocystis 6803

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