José Berenguer

Diversity among clinical isolates of penicillin-resistant Streptococcus mitis: indication for a PBP1-dependent way to reach high levels of penicillin resistance (2010)

Manuel Sánchez; Centro De Investigación Básica, NPDD–Merck ResearchLaboratories, Merck Sharp & Dohme De España S.A., Madrid, Spain, María Francisca Vicente; Centro De Investigación Básica, NPDD–Merck Research Laboratories, Merck Sharp & Dohme De España S.A., Madrid, Spain, Emilia Cercenado; Servicio De Microbiología, Hospital General Universitario “Gregorio Marañón”, Madrid, Spain, Miguel A. De Pedro; Departamento De Biología Molecular, CBM-UAM, Madrid, Spain, Pilar Gómez; Centro De Investigación Básica, NPDD–Merck ResearchLaboratories, Merck Sharp & Dohme De España S.A., Madrid, Spain; And Departamento De Biología Molecular, CBM-UAM, Madrid, Spain, Renata Moreno; Departamento De Biología Molecular, CBM-UAM, Madrid, Spain, ...

A total of 12 non-epidemiologically related clinical isolates of Streptococcus mitis that showed different levels of resistance to penicillin were studied. Membrane-protein profiles and...

Membrane-associated maturation of the heterotetrameric nitrate reductase of Thermus thermophilus (2005)

Zafra, Olga, Cava, Felipe, Blasco, Francis, Magalon, Axel, Berenguer, José

The nar operon, coding for the respiratory nitrate reductase of Thermus thermophilus (NRT), encodes a di-heme b-type (NarJ) and a di-heme c-type (NarC) cytochrome. The role of both cytochromes and...

Use of an antisense RNA strategy to investigate the functional significance of Mn-catalase in the extreme thermophile Thermus thermophilus (2004)

Moreno, Renata, Hidalgo, Aurelio, Cava, Felipe, Fernández-Lafuente, Roberto, Manuel Guisán, José, Berenguer, José

The expression of an antisense RNA revealed that an Mn-catalase was required in Thermus thermophilus for aerobic but not for anaerobic growth. The antisense system is based on the constitutive...

Enhancement of DNA, cDNA synthesis and fidelity at high temperatures by a dimeric single-stranded DNA-binding protein (2003)

Perales, Celia, Cava, Felipe, Meijer, Wilfried J.J., Berenguer, José

Bacterial single-stranded DNA-binding proteins (SSBs) are required for DNA replication and repair. We have over-expressed and purified the native form and two His-tagged fusions of the SSB from...

Temperature-dependent hypermutational phenotype in recA mutants of Thermus thermophilus HB27 (2003)

Castán, Pablo, Casares, Lorena, Barbé, Jordi, Berenguer, José

The recA gene from Thermus thermophilus HB27 was cloned and engineered to obtain insertion (recA::kat) and deletion (delta-recA) derivatives. Transcription of recA in this extreme thermophile was...

Enhancement of DNA, cDNA synthesis and fidelity at high temperatures by a dimeric single-stranded DNA-binding protein (2003)

Perales, Celia, Cava, Felipe, Meijer, Wilfried J. J., Berenguer, José

Bacterial single‐stranded DNA‐binding proteins (SSBs) are required for DNA replication and repair. We have over‐expressed and purified the native form and two His‐tagged fusions...

Efficient trans-cleavage by the Schistosoma mansoni SM{alpha}1 hammerhead ribozyme in the extreme thermophile Thermus thermophilus (2002)

Vazquez-Tello, Alejandro, Castán, Pablo, Moreno, Renata, Smith, James M., Berenguer, José, Cedergren, Robert

The catalytic hammerhead structure has been found in association with repetitive DNA from several animals, including salamanders, crickets and schistosomes, and functions to process in cis the long...

Multiple Regulatory Mechanisms Act on the 5′ Untranslated Region of the S-Layer Gene from Thermus thermophilus HB8

Castán, Pablo, De Pedro, Miguel A., Risco, Cristina, Vallés, Cristina, Fernández, Luis A., Schwarz, Heinz, ...

The role of the 5′ untranslated region (5′UTR) of the S-layer gene from Thermus thermophilus was analyzed through the isolation of Δ5′UTR mutants. In these mutants the half-life of splA mRNA...

Efficient trans-cleavage by the Schistosoma mansoni SMα1 hammerhead ribozyme in the extreme thermophile Thermus thermophilus

Vazquez-Tello, Alejandro, Castán, Pablo, Moreno, Renata, Smith, James M., Berenguer, José, Cedergren, Robert

The catalytic hammerhead structure has been found in association with repetitive DNA from several animals, including salamanders, crickets and schistosomes, and functions to process in cis the long...

Anaerobic Growth, a Property Horizontally Transferred by an Hfr-Like Mechanism among Extreme Thermophiles

Ramírez-Arcos, Sandra, Fernández-Herrero, Luis A., Marín, Irma, Berenguer, José

Despite the fact that the extreme thermophilic bacteria belonging to the genus Thermus are classified as strict aerobes, we have shown that Thermus thermophilus HB8 (ATCC 27634) can grow...

Two Nitrate/Nitrite Transporters Are Encoded within the Mobilizable Plasmid for Nitrate Respiration of Thermus thermophilus HB8

Ramírez, Sandra, Moreno, Renata, Zafra, Olga, Castán, Pablo, Vallés, Cristina, Berenguer, José

Thermus thermophilus HB8 can grow anaerobically by using a membrane-bound nitrate reductase to catalyze the reduction of nitrate as a final electron acceptor in respiration. In contrast to other...

Temperature-Dependent Hypermutational Phenotype in recA Mutants of Thermus thermophilus HB27

Castán, Pablo, Casares, Lorena, Barbé, Jordi, Berenguer, José

The recA gene from Thermus thermophilus HB27 was cloned and engineered to obtain insertion (recA::kat) and deletion (ΔrecA) derivatives. Transcription of recA in this extreme thermophile was induced...

Effect of Protein Synthesis Inhibition on the Induction of Cell Lysis in Escherichia coli by Mecillinam plus Nocardicin A

Berenguer, José, De Pedro, Miguel A., Vázquez, David

Cell lysis can be induced in Escherichia coli by the combined use of the β-lactam antibiotics nocardicin A and mecillinam. Apparently, the induction of cell lysis occurs by a sequential mechanism in...

Enhancement of DNA, cDNA synthesis and fidelity at high temperatures by a dimeric single-stranded DNA-binding protein

Perales, Celia, Cava, Felipe, Meijer, Wilfried J. J., Berenguer, José

Bacterial single-stranded DNA-binding proteins (SSBs) are required for DNA replication and repair. We have over-expressed and purified the native form and two His-tagged fusions of the SSB from...

Thermus thermophilus as a Cell Factory for the Production of a Thermophilic Mn-Dependent Catalase Which Fails To Be Synthesized in an Active Form in Escherichia coli

Hidalgo, Aurelio, Betancor, Lorena, Moreno, Renata, Zafra, Olga, Cava, Felipe, Fernández-Lafuente, Roberto, ...

Thermostable Mn-dependent catalases are promising enzymes in biotechnological applications as H2O2-detoxifying systems. We cloned the genes encoding Mn-dependent catalases from Thermus thermophilus...

Use of an Antisense RNA Strategy To Investigate the Functional Significance of Mn-Catalase in the Extreme Thermophile Thermus thermophilus

Moreno, Renata, Hidalgo, Aurelio, Cava, Felipe, Fernández-Lafuente, Roberto, Guisán, José Manuel, Berenguer, José

The expression of an antisense RNA revealed that an Mn-catalase was required in Thermus thermophilus for aerobic but not for anaerobic growth. The antisense system is based on the constitutive...

High-Level Overproduction of His-Tagged Tth DNA Polymerase in Thermus thermophilus

Moreno, Renata, Haro, Amparo, Castellanos, Angel, Berenguer, José

A new plasmid for the overexpression of His-tagged thermozymes in Thermus thermophilus was developed. With this plasmid, soluble and active histidine-tagged DNA polymerase from T. thermophilus was...

Multiple Regulatory Mechanisms Act on the 5′ Untranslated Region of the S-Layer Gene from Thermus thermophilus HB8

Castán, Pablo, De Pedro, Miguel A., Risco, Cristina, Vallés, Cristina, Fernández, Luis A., Schwarz, Heinz, ...

The role of the 5′ untranslated region (5′UTR) of the S-layer gene from Thermus thermophilus was analyzed through the isolation of Δ5′UTR mutants. In these mutants the half-life of splA mRNA...

Efficient trans-cleavage by the Schistosoma mansoni SMα1 hammerhead ribozyme in the extreme thermophile Thermus thermophilus

Vazquez-Tello, Alejandro, Castán, Pablo, Moreno, Renata, Smith, James M., Berenguer, José, Cedergren, Robert

The catalytic hammerhead structure has been found in association with repetitive DNA from several animals, including salamanders, crickets and schistosomes, and functions to process in cis the long...

Anaerobic Growth, a Property Horizontally Transferred by an Hfr-Like Mechanism among Extreme Thermophiles

Ramírez-Arcos, Sandra, Fernández-Herrero, Luis A., Marín, Irma, Berenguer, José

Despite the fact that the extreme thermophilic bacteria belonging to the genus Thermus are classified as strict aerobes, we have shown that Thermus thermophilus HB8 (ATCC 27634) can grow...

Two Nitrate/Nitrite Transporters Are Encoded within the Mobilizable Plasmid for Nitrate Respiration of Thermus thermophilus HB8

Ramírez, Sandra, Moreno, Renata, Zafra, Olga, Castán, Pablo, Vallés, Cristina, Berenguer, José

Thermus thermophilus HB8 can grow anaerobically by using a membrane-bound nitrate reductase to catalyze the reduction of nitrate as a final electron acceptor in respiration. In contrast to other...

Temperature-Dependent Hypermutational Phenotype in recA Mutants of Thermus thermophilus HB27

Castán, Pablo, Casares, Lorena, Barbé, Jordi, Berenguer, José

The recA gene from Thermus thermophilus HB27 was cloned and engineered to obtain insertion (recA::kat) and deletion (ΔrecA) derivatives. Transcription of recA in this extreme thermophile was induced...

Effect of Protein Synthesis Inhibition on the Induction of Cell Lysis in Escherichia coli by Mecillinam plus Nocardicin A

Berenguer, José, De Pedro, Miguel A., Vázquez, David

Cell lysis can be induced in Escherichia coli by the combined use of the β-lactam antibiotics nocardicin A and mecillinam. Apparently, the induction of cell lysis occurs by a sequential mechanism in...

Enhancement of DNA, cDNA synthesis and fidelity at high temperatures by a dimeric single-stranded DNA-binding protein

Perales, Celia, Cava, Felipe, Meijer, Wilfried J. J., Berenguer, José

Bacterial single-stranded DNA-binding proteins (SSBs) are required for DNA replication and repair. We have over-expressed and purified the native form and two His-tagged fusions of the SSB from...

Thermus thermophilus as a Cell Factory for the Production of a Thermophilic Mn-Dependent Catalase Which Fails To Be Synthesized in an Active Form in Escherichia coli

Hidalgo, Aurelio, Betancor, Lorena, Moreno, Renata, Zafra, Olga, Cava, Felipe, Fernández-Lafuente, Roberto, ...

Thermostable Mn-dependent catalases are promising enzymes in biotechnological applications as H2O2-detoxifying systems. We cloned the genes encoding Mn-dependent catalases from Thermus thermophilus...

Use of an Antisense RNA Strategy To Investigate the Functional Significance of Mn-Catalase in the Extreme Thermophile Thermus thermophilus

Moreno, Renata, Hidalgo, Aurelio, Cava, Felipe, Fernández-Lafuente, Roberto, Guisán, José Manuel, Berenguer, José

The expression of an antisense RNA revealed that an Mn-catalase was required in Thermus thermophilus for aerobic but not for anaerobic growth. The antisense system is based on the constitutive...

High-Level Overproduction of His-Tagged Tth DNA Polymerase in Thermus thermophilus

Moreno, Renata, Haro, Amparo, Castellanos, Angel, Berenguer, José

A new plasmid for the overexpression of His-tagged thermozymes in Thermus thermophilus was developed. With this plasmid, soluble and active histidine-tagged DNA polymerase from T. thermophilus was...

Use of a Dominant rpsL Allele Conferring Streptomycin Dependence for Positive and Negative Selection in Thermus thermophilus▿ †

Blas-Galindo, Emilio, Cava, Felipe, López-Viñas, Eduardo, Mendieta, Jesús, Berenguer, José

A spontaneous rpsL mutant of Thermus thermophilus was isolated in a search for new selection markers for this organism. This new allele, named rpsL1, encodes a K47R/K57E double mutant S12 ribosomal...