Two-dimensional electrophoresis database of Listeria monocytogenes EGDe proteome and proteomic analysis of mid-log and stationary growth phase cells

被引:48
作者
Folio, P [1 ]
Chavant, P [1 ]
Chafsey, I [1 ]
Belkorchia, A [1 ]
Chambon, C [1 ]
Hébraud, M [1 ]
机构
[1] INRA Site Theix, Stn Rech Viande Microbiol Plate Forme Prete, F-63122 St Genes Champanelle, France
关键词
Listeria monocytogenes; matrix assisted laser desorption/ionization-time of flight-mass spectrometry; mid-log and stationary phase of growth; proteome; two-dimensional gel electrophoresis database;
D O I
10.1002/pmic.200300841
中图分类号
Q5 [生物化学];
学科分类号
071010 ; 081704 ;
摘要
Listeria monocytogenes is the causative agent of listeriosis, one of the mo#st significant food-borne diseases in industrialized countries. The complete genome of the L. monocytogenes EGDe strain, belonging to the serogroup 1/2a, has been sequenced and is comprised of 2853 open reading frames. The objective of the current study was to construct a two-dimensional (2-D) database of the proteome of this strain. The soluble protein fractions of the microorganism were recovered either in the mid-log or in the stationary phase of growth at 37degreesC. These fractions were analyzed by 2-D electrophoresis (2-DE), using immobilized pH gradient strips of various pH values (3-10, 3-6, and 5-8) for the first-dimensional separations and 12.5% acrylamide gels for sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE). 201 protein spots corresponding to 126 different proteins were identified by matrix assisted laser desorption/ionization-time of flight-mass spectrometry (MALDI-TOF-MS). The 2-DE maps presented here provide a first basis for further investigations of protein expression in L. monocytogenes. In this way, the comparison of proteome between cells in the exponential or stationary phase of growth at 37degreesC allowed us to characterize 161 variations in protein spot intensity, of which 38 were identified. Among the differentially expressed proteins were ribosomal proteins (RpsF, RplJ, and RpmE), proteins involved in cellular metabolism (GlpD, PdhD, Pgm, Lmo1372, Lmo2696, and Lmo2743) or in stress adaptation (GroES and ferritin), a fructose-specific phosphotransferase enzyme IIB (Lmo0399) and different post-translational modified forms of listeriolysin (LLO).
引用
收藏
页码:3187 / 3201
页数:15
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