http://publicationslist.org/data/paloma.lopez/atom.xml paloma lopezhttp://publicationslist.org/paloma.lopez$basepathfavicon.icoRecent additions to paloma lopez's PublicationsList.org pagehttp://publicationslist.org/publications.png2008-10-30T13:17:53Z http://publicationslist.org/paloma.lopez/refid1 2008-10-30T13:10:18Z

Exopolysaccharides play an important role in the rheology and texture of fermented foods, and among these beta-glucans have immunomodulating properties. We show that the overproduction of the Pediococcus parvulus GTF glycosyltransferase in an uncapsulated Lactococcus lactis strain results in synthesis and secretion (300 mg liter(-1)) of a position 2-substituted (1-->3)-beta-D-glucan that has poten...<br/><br/>María Laura Werning, María Angeles Corrales, Alicia Prieto, Pilar Fernández de Palencia, Jesús Navas, Paloma López (2008) <i>Appl Environ Microbiol</i> <i></i> <i></i> 74: 16 5259-5262<br/>

http://publicationslist.org/paloma.lopez/refid11 2008-10-30T13:14:23Z

Lactococcus lactis subsp. lactis biovar diacetylactis CRL264 is a natural strain isolated from cheese (F. Sesma, D. Gardiol, A. P. de Ruiz Holgado, and D. de Mendoza, Appl. Environ. Microbiol. 56:2099-2103, 1990). The effect of citrate on the growth parameters at a very acidic pH value was studied with this strain and with derivatives whose citrate uptake capacity was genetically manipulated. The ...<br/><br/>Claudia Sánchez, Ana Rute Neves, João Cavalheiro, Margarida Moreira dos Santos, Nieves García-Quintáns, Paloma López, Helena Santos (2008) <i>Appl Environ Microbiol</i> 74: 4 1136-1144<br/>

http://publicationslist.org/paloma.lopez/refid10 2008-10-30T13:13:23Z

Enterocin AS-48 production and immunity characters are encoded by 10 genes (as-48ABCC(1)DD(1)EFGH) of the pMB2 plasmid from the Enterococcus faecalis S-48 strain. Among these, as-48A, encoding the AS-48 peptide, and the as-48BC genes constitute a cluster required for AS-48 biogenesis and full immunity. In this study, the levels of expression of this cluster have been altered by insertion and site-...<br/><br/>Matilde Fernández, Marina Sánchez-Hidalgo, Nieves García-Quintáns, Manuel Martínez-Bueno, Eva Valdivia, Paloma López, Mercedes Maqueda (2008) <i>J Bacteriol</i> 190: 1 240-250<br/>

http://publicationslist.org/paloma.lopez/refid2 2008-10-30T13:11:43Z

Lactococcus lactis subsp. lactis bv. diacetylactis strains are aroma-producing organisms used in starter cultures for the elaboration of dairy products. This species is essentially a fermentative microorganism, which cometabolizes glucose and citrate to yield aroma compounds through the diacetyl/acetoin biosynthetic pathway. Our previous results have shown that under acidic growth Lactococcus bv. ...<br/><br/>Nieves García-Quintáns, Guillermo Repizo, Mauricio Martín, Christian Magni, Paloma López (2008) <i>Appl Environ Microbiol</i> 74: 7 1988-1996<br/>

http://publicationslist.org/paloma.lopez/refid3 2008-10-30T13:10:18Z

Exopolysaccharide production by lactic acid bacteria is beneficial in the dairy and oat-based food industries and is used to improve the texture of the fermented products. However, beta-D-glucan-producing bacteria are considered spoilage microorganisms in alcoholic beverages because their secreted exopolysaccharides alter the viscosity of cider, wine, and beer, rendering them unpalatable. The plas...<br/><br/>Maria Laura Werning, Idoia Ibarburu, Maria Teresa Dueñas, Ana Irastorza, Jesús Navas, Paloma López (2006) <i>J Food Prot</i> <i></i> <i></i> 69: 1 161-169<br/>

http://publicationslist.org/paloma.lopez/refid5 2008-10-30T13:10:18Z

The YycFG two-component system, originally identified in Bacillus subtilis, is highly conserved among gram-positive bacteria with low G+C contents. In Streptococcus pneumoniae, the YycF response regulator has been reported to be essential for cell growth, but the signal to which it responds and the gene members of the regulon remain unclear. In order to investigate the role of YycFG in S. pneumoni...<br/><br/>M Luz Mohedano, Karin Overweg, Alicia de la Fuente, Mark Reuter, Silvia Altabe, Francis Mulholland, Diego de Mendoza, Paloma López, Jerry M Wells (2005) <i>J Bacteriol</i> <i></i> <i></i> 187: 7 2357-2367<br/>

http://publicationslist.org/paloma.lopez/refid4 2008-10-30T13:10:18Z

A large variety of lactic acid bacteria (LAB) can utilize citrate under fermentative conditions. Although much information concerning the metabolic pathways leading to citrate utilization by LAB has been gathered, the mechanisms regulating these pathways are obscure. In Weissella paramesenteroides (formerly called Leuconostoc paramesenteroides), transcription of the citMDEFCGRP citrate operon and ...<br/><br/>Mauricio G Martin, Christian Magni, Diego de Mendoza, Paloma López (2005) <i>J Bacteriol</i> <i></i> <i></i> 187: 15 5146-5155<br/>

http://publicationslist.org/paloma.lopez/refid6 2008-10-30T13:10:18Z

The amino acid conversion to volatile compounds by lactic acid bacteria is important for aroma formation in cheese. In this work, we analyzed the effect of the lytic bacteriocin Lacticin 3147 on transamination of isoleucine and further formation of the volatile compound 2-methylbutanal in cheese. The Lacticin 3147 producing strain Lactococcus lactis IFPL3593 was fluorescently tagged (IFPL3593-GFP)...<br/><br/>Pilar Fernández de Palencia, Marta de la Plaza, M Luz Mohedano, M Carmen Martínez-Cuesta, Teresa Requena, Paloma López, Carmen Peláez (2004) <i>Int J Food Microbiol</i> <i></i> <i></i> 93: 3 335-347<br/>

http://publicationslist.org/paloma.lopez/refid12 2008-10-30T13:15:45Z

This report describes the implementation and use of a maltose-inducible system for regulated gene expression in Lactococcus lactis. The system was established using Green Fluorescent Protein as reporter. The transcription of a gene of interest from the inducible promoter of pLS1RGFP plasmid vector can be easily monitored by fluorescence spectroscopy and microscopy. As an example, the lactococcal r...<br/><br/>S C Viegas, P Fernández De Palencia, M Amblar, C M Arraiano, P López (2004) <i>Plasmid</i> <i></i> <i></i> 51: 3 256-264<br/>

http://publicationslist.org/paloma.lopez/refid7 2008-10-30T13:10:18Z

To define the active site of the 5'-3' exonucleolytic domain of the Streptococcus pneumoniae DNA polymerase I (Spn pol I), we have constructed His-tagged Spn pol I fusion protein and introduced mutations at residues Asp(10), Glu(88), and Glu(114), which are conserved among all prokaryotic and eukaryotic 5' nucleases. The mutations, but not the fusion to the C-terminal end of the wild-type, reduced...<br/><br/>M Amblar, M G de Lacoba, M A Corrales, P Lopez (2001) <i>J Biol Chem</i> <i></i> <i></i> 276: 22 19172-19181<br/>

http://publicationslist.org/paloma.lopez/refid14 2008-10-30T13:15:45Z

The gfp gene from Aequorea victoria, encoding the green fluorescent protein (GFP) has been expressed in Lactococcus lactis subsp. lactis biovar cremoris MG1363, upon construction and introduction of plasmid pLS1GFP into this host. GFP was monitored in living cells during growth to evaluate its use in molecular and physiological studies. Quantification of the levels of GFP expressed by cultures was...<br/><br/>P Fernández de Palencia, C Nieto, P Acebo, M Espinosa, P López (2000) <i>FEMS Microbiol Lett</i> <i></i> <i></i> 183: 2 229-234<br/>

http://publicationslist.org/paloma.lopez/refid13 2008-10-30T13:15:45Z

We have constructed a regulated plasmid vector for Streptococcus pneumoniae, based on the streptococcal broad-host-range replicon pLS1. As a reporter gene, we subcloned the gfp gene from Aequorea victoria, encoding the green fluorescent protein. This gene was placed under the control of the inducible P(M) promoter of the S. pneumoniae malMP operon which, in turn, is regulated by the product of the...<br/><br/>C Nieto, P Fernández de Palencia, P López, M Espinosa (2000) <i>Plasmid</i> <i></i> <i></i> 43: 3 205-213<br/>

http://publicationslist.org/paloma.lopez/refid9 2008-10-30T13:10:18Z

A modified gfp gene from Aequorea victoria, encoding a variant of the green fluorescent protein (GFP), was subcloned into the mobilizable plasmid pMV158. gfp was placed under the control of the inducible P(M) promoter of the Streptococcus pneumoniae gene malM, cloned in plasmid pLS70. The P(M) promoter is regulated by the product of the pneumococcal malR gene, which is inactivated by growing the c...<br/><br/>P Acebo, C Nieto, M A Corrales, M Espinosa, P López (2000) <i>Microbiology</i> <i></i> <i></i> 146 ( Pt 6): 1267-1273<br/>

http://publicationslist.org/paloma.lopez/refid8 2008-10-30T13:10:18Z

Citrate transport in Lactococcus lactis biovar diacetylactis (L. diacetylactis) is catalyzed by citrate permease P (CitP), which is encoded by the plasmidic citP gene. Two partial overlapping open reading frames citQ and citR are located upstream of citP. These two genes, together with citP, constitute the citQRPoperon. In this report it was shown that in L. diacetylactis and Escherichia coli, cit...<br/><br/>D Drider, J M Santos, N García-Quintáns, C M Arraiano, P López (1999) <i>J Mol Microbiol Biotechnol</i> <i></i> <i></i> 1: 2 337-346<br/>