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Proteomics. 2005 Feb;5(2):340-50.

Identification of heme binding protein complexes in murine erythroleukemic cells: study by a novel two-dimensional native separation -- liquid chromatography and electrophoresis.

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Institute of Hematology and Blood Transfusion, Prague, Czech Republic.


In the current postgenomic era there is a growing interest in analysis of protein complexes in their native state. Here we present a novel two-dimensional separation technique for assessment of native protein complexes. The method combines native chromatography with native electrophoresis. The approach was used to study heme-binding protein complexes in murine erythroleukemia cells. The cells were metabolically labeled with [(59)Fe]-heme and cellular lysates were separated by anion-exchange chromatography. Fractions containing the (59)Fe isotope were collected, concentrated and further separated by native gel electrophoresis. A total of 13 radioactive protein bands were detected and analyzed by liquid chromatography-tandem mass spectrometry. Thirty-three individual proteins were identified and attributed to four novel multiprotein complexes representing four different 'snapshots' of cellular events involved in hemoglobin biosynthesis.

[Indexed for MEDLINE]

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