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Volume 154, Issue 12

Host -adducin is redistributed and localized to the inclusion membrane in and -infected cells Free

Abstract

A large-scale analysis of proteins involved in host-cell signalling pathways was performed using chlamydia-infected murine cells in order to identify host proteins that are differentially activated or localized following infection. Two proteins whose distribution was altered in -infected cells relative to mock-infected cells were the actin-binding protein adducin and the regulatory kinase Raf-1. Immunoblot analysis with antibodies to both phosphorylated and non-phosphorylated forms of these proteins demonstrated that the abundance of each protein was markedly reduced in the cytosolic fraction of - and -infected cells, but the total cellular protein abundance remained unaffected by infection. Fluorescence microscopy of chlamydia-infected cells using anti--adducin antibodies demonstrated labelling at or near the chlamydial inclusion membrane. Treatment of infected cells with nocodazole or cytochalasin D did not affect -adducin that was localized to the margins of the inclusion. The demonstration of -adducin and Raf-1 redistribution within cells infected by different chlamydiae provides novel opportunities for analysis of host–pathogen interactions in this system.

  • Received:
  • Accepted:
  • Revised:
  • Published Online:
Keyword(s): DAPI, 4′,6-diamidino-2-phenylindole dihydrochloride , p.i., post-infection and TS, Triton-soluble
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2008-12-01
2024-04-25
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Host α-adducin is redistributed and localized to the inclusion membrane in Chlamydia- and Chlamydophila-infected cells
Microbiology 154, 3848 (2008); https://doi.org/10.1099/mic.0.2008/020941-0
/content/journal/micro/10.1099/mic.0.2008/020941-0
/content/journal/micro/10.1099/mic.0.2008/020941-0
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