Browsing by Author "Álvarez Armijo, Sergio Aníbal"

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    • Copper ions stimulate polyphosphate degradation and phosphate efflux in Acidithiobacillus ferrooxidans 
      Álvarez Armijo, Sergio Aníbal; Jerez Guevara, Carlos (AMER SOC MICROBIOLOGY, 2004-09)
      For some bacteria and algae, it has been proposed that inorganic polyphosphates and transport of metal-phosphate complexes could participate in heavy metal tolerance. To test for this possibility in Acidithiobacillus ...
    • Different sugar residues of the lipopolysaccharide outer core are required for early interactions of ... 
      Bravo, Denisse; Hoare, Anilei; Silipo, Alba; Valenzuela, Camila; Salinas, Catalina; Álvarez Armijo, Sergio Aníbal; Molinaro, Antonio; Valvano, Miguel A.; Contreras, Inés (Elsevier, 2011)
      The role of lipopolysaccharide (LPS) in entry of Salmonella Typhimurium into epithelial cells remains unclear. In this study, we tested the ability of a series of mutants with deletions in genes for the synthesis and ...
    • Growth-phase regulation of lipopolysaccharide O-antigen chain length influences serum resistance in serovars ... 
      Bravo Rodríguez, Denisse; Silva Valenzuela, Cecilia Alejandra; Carter Jaña, Javier Antonio; Hoare Teuche, Anilei Paz; Álvarez Armijo, Sergio Aníbal; Blondel, Carlos; Zaldívar San Román, María Mercedes; Valvano, Miguel A.; Contreras, Inés (SOC GENERAL MICROBIOLOGYJournal Of Medical Microbiology, vol. 57 Issue 8 p. 938-946 AUG 2008, 2008-08)
      The amount of lipopolysaccharide (LPS) O antigen (OAg) and its chain length distribution are important factors that protect bacteria from serum complement. Salmonella enterica serovar Typhi produces LPS with long chain ...
    • Novel template plasmids pCyaA’-Kan and pCyaA’-Cam for generation of unmarked chromosomal cyaA’ translational ... 
      Fernández Oyarzún, Paulina Alejandra; Zabner Espinoza, Marcela Estefanía; Ortega Berríos, Jaime Ignacio; Morgado Ruiz, Constanza Patricia; Amaya Inzunza, Fernando Andrés; Vera Sánchez, Gabriel Alberto; Rubilar Leyton, Carolina Andrea; Salas Valenzuela, Beatriz Elizabeth; Cuevas, Víctor; Valenzuela Montenegro, Camila; Baisón Olmo, Fernando; Álvarez Armijo, Sergio Aníbal; Santiviago Cid, Carlos Alberto (MDPI, 2021)
      The type III secretion systems (T3SS) encoded in pathogenicity islands SPI-1 and SPI-2 are key virulence factors of Salmonella. These systems translocate proteins known as effectors into eukaryotic cells during infection. ...
    • O-antigen modal chain length in Shigella flexneri 2a is growth-regulated through RfaH-mediated transcriptional ... 
      Carter Jaña, Javier Antonio; Blondel, Carlos; Zaldívar San Román, María Mercedes; Álvarez Armijo, Sergio Aníbal; Marolda, Cristina L.; Valvano, Miguel A.; Contreras, Inés (SOC GENERAL MICROBIOLOGY, 2007-10)
      Shigella flexneri 2a 2457T produces lipopolysaccharide (LIPS) with two O-antigen (OAg) chain lengths: a short (S-OAg) controlled by WzzB and a very long (VL-OAg) determined by Wzz(pHS-2). This study demonstrates that the ...
    • The outer core lipopolysaccharide of Salmonella enterica Serovar typhi is required for bacterial entry into ... 
      Hoare, Anilei; Bittner, Mauricio; Carter, Javier; Álvarez Armijo, Sergio Aníbal; Zaldívar San Román, María Mercedes; Bravo, Denisse; Valvano, Miguel A.; Contreras, Inés (AMER SOC MICROBIOLOGY, 2006-03)
      Salmonella enterica serovar Typhi causes typhoid fever in humans. Central to the pathogenicity of serovar Typhi is its capacity to invade intestinal epithelial cells. The role of lipopolysaccharide (LPS) in the invasion ...
    • The Type VI Secretion System Encoded in Salmonella Pathogenicity Island 19 Is Required for Salmonella ... 
      Blondel, Carlos J.; Jiménez, Juan C.; Leiva, Lorenzo E.; Álvarez Armijo, Sergio Aníbal; Pinto, Bernardo I.; Contreras, Francisca; Pezoa, David; Santiviago Cid, Carlos; Contreras, Inés (American Society for Microbiology, 2013-04)
      Salmonella enterica serotype Gallinarum is the causative agent of fowl typhoid, a disease characterized by high morbidity and mortality that causes major economic losses in poultry production. We have reported that S. ...