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Pregled bibliografske jedinice broj: 92759

The C-terminus of IcmT is essential for pore formation and for intracellular trafficking of Legionella pneumophila within Acanthamoeba polyphaga


Molmeret, Maelle; Alli O.A., Terry; Radulić, Marina; Šuša, Milorad; Dorić, Miljenko; Abu Kwaik, Yousef
The C-terminus of IcmT is essential for pore formation and for intracellular trafficking of Legionella pneumophila within Acanthamoeba polyphaga // Molecular Microbiology, 43 (2002), 5; 1139-1150 (međunarodna recenzija, članak, znanstveni)


CROSBI ID: 92759 Za ispravke kontaktirajte CROSBI podršku putem web obrasca

Naslov
The C-terminus of IcmT is essential for pore formation and for intracellular trafficking of Legionella pneumophila within Acanthamoeba polyphaga

Autori
Molmeret, Maelle ; Alli O.A., Terry ; Radulić, Marina ; Šuša, Milorad ; Dorić, Miljenko ; Abu Kwaik, Yousef

Izvornik
Molecular Microbiology (0950-382X) 43 (2002), 5; 1139-1150

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Legionella pneumophila; Icm T mutant; pore formation; intracellular trafficking

Sažetak
We have shown previously that the five rib (release of intrcellular bacteria) mutants of Legionella pneumophila are competent for intracellular replication but defective in pore formation-mediated cytolysis and egress from protozoan and mammalian cells. The rib phenotype results from a point mutation (deletion) G544 in icmT that is predicted to result in the expression of a protein truncated by 32 animo acids from the C-terminus. In contrast to the rib mutants that are capable of intracellular replication, an icmT null mutant was completely defective in intracellular replication within mammalian and protozoan cells, in addition to its defect in pore formation-mediated cytolysis. The icmT wild-type allele complemented the icmT null mutant for both defects of intracellular replication and pore formation-mediated cytolysis and egress from mammalian cells. In contrast, the icmT G544 allele complemented the icmT null mutant for intracellular growth, but not for the pore-forming activity. Consistent with their defect in pore formation-mediated cytotoxicity in vitro, both mutants failed to cause pulmonary inflammation in A/J mice. Interestingly, the rib mutant was severaly defective in intracellular growth within Acanthamoeba polyphaga. Confocal laser scanning and electron microscopy confirmed that the rib mutant and the icmT null mutant were severely and completely defective, respectively, in intracellular growth in A. polyphaga, and the respective defects correlated with fusion of the bacterial phagosomes to lysosomes. Taken together, the data showed that the C-terminus domain of IcmT is essential for the pore-forming activity and is required for intracellular trafficking and replication within A. polyphaga, but not within mammalian cells.

Izvorni jezik
Engleski

Znanstvena područja
Temeljne medicinske znanosti



POVEZANOST RADA


Projekt / tema
062027

Ustanove
Medicinski fakultet, Rijeka

Profili:

Avatar Url Miljenko Dorić (autor)

Avatar Url Marina Šantić (autor)

Avatar Url Milorad Šuša (autor)

Citiraj ovu publikaciju

Molmeret, Maelle; Alli O.A., Terry; Radulić, Marina; Šuša, Milorad; Dorić, Miljenko; Abu Kwaik, Yousef
The C-terminus of IcmT is essential for pore formation and for intracellular trafficking of Legionella pneumophila within Acanthamoeba polyphaga // Molecular Microbiology, 43 (2002), 5; 1139-1150 (međunarodna recenzija, članak, znanstveni)
Molmeret, M., Alli O.A., T., Radulić, M., Šuša, M., Dorić, M. & Abu Kwaik, Y. (2002) The C-terminus of IcmT is essential for pore formation and for intracellular trafficking of Legionella pneumophila within Acanthamoeba polyphaga. Molecular Microbiology, 43 (5), 1139-1150.
@article{article, year = {2002}, pages = {1139-1150}, keywords = {Legionella pneumophila, Icm T mutant, pore formation, intracellular trafficking}, journal = {Molecular Microbiology}, volume = {43}, number = {5}, issn = {0950-382X}, title = {The C-terminus of IcmT is essential for pore formation and for intracellular trafficking of Legionella pneumophila within Acanthamoeba polyphaga}, keyword = {Legionella pneumophila, Icm T mutant, pore formation, intracellular trafficking} }

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus
  • MEDLINE