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Koopman, F. (author), Wierckx, N. (author), de Winde, J.H. (author), Ruijssenaars, H.J. (author), TNO Kwaliteit van Leven (author)The toxic fermentation inhibitors in lignocellulosic hydrolysates pose significant problems for the production of second-generation biofuels and biochemicals. Among these inhibitors, 5-(hydroxymethyl) furfural (HMF) and furfural are specifically notorious. In this study, we describe the complete molecular identification and characterization of...article 2010
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TrgI, toluene repressed gene I, a novel gene involved in toluene-tolerance in Pseudomonas putida S12Volkers, R.J.M. (author), Ballerstedt, H. (author), Ruijssenaars, H. (author), de Bont, J.A.M. (author), de Winde, J.H. (author), Wery, J. (author), TNO Kwaliteit van Leven (author)Pseudomonas putida S12 is well known for its remarkable solvent tolerance. Transcriptomics analysis of this bacterium grown in toluene-containing chemostats revealed the differential expression of 253 genes. As expected, the genes encoding one of the major solvent tolerance mechanisms, the solvent efflux pump SrpABC and its regulatory genes...article 2009
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van der Werf, M.J. (author), Pieterse, B. (author), van Luijk, N. (author), Schuren, F. (author), van der Werff van der - Vat, B. (author), Overkamp, K. (author), Jellema, R.H. (author), TNO Kwaliteit van Leven (author)The value of the multivariate data analysis tools principal component analysis (PCA) and principal component discriminant analysis (PCDA) for prioritizing leads generated by microarrays was evaluated. To this end, Pseudomonas putida S12 was grown in independent triplicate fermentations on four different carbon sources, i.e. fructose, glucose,...article 2006
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Pieterse, B. (author), Leer, R.J. (author), Schuren, F.H.J. (author), van der Werf, M.J. (author), TNO Kwaliteit van Leven (author)The organic acid lactate is the predominant fermentation product of Lactobacillus plantarum. The undissociated form of this organic acid is a strong growth inhibitor for the organism. Different theories have been postulated to explain the inhibitory effects of lactic acid: (i) toxicity arising from the dissipation of the membrane potential, (ii)...article 2005
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TNO Kwaliteit van Leven (author), van Kranenburg, R. (author), Golic, N. (author), Bongers, R. (author), Leer, R.J. (author), de Vos, W.M. (author), Siezen, R.J. (author), Kleerebezem, M. (author)Lactobacillus plantarum WCFS1 harbors three plasmids, pWCFS101, pWCFS102, and pWCFS103, with sizes of 1,917, 2,365, and 36,069 bp, respectively. The two smaller plasmids are of unknown function and contain replication genes that are likely to function via the rolling-circle replication mechanism. The host range of the p WCFS101 replicon includes...article 2005
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Kralj, S. (author), van Geel-Schutten, G.H. (author), Dondorff, M.M.G. (author), Kirsanovs, S. (author), van der Maarel, M.J.E.C. (author), Dijkhuizen, L. (author), TNO Voeding Centraal Instituut voor Voedingsonderzoek TNO (author)Members of the genera Streptococcus and Leuconostoc synthesize various α-glucans (dextran, alternan and mutan). In Lactobacillus, until now, the only glucosyltransferase (GTF) enzyme that has been characterized is gtfA of Lactobacillus reuteri 121, the first GTF enzyme synthesizing a glucan (reuteran) that contains mainly α-(1 → 4) linkages...article 2004
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van Hijum, S.A.F.T. (author), Szalowska, E. (author), van der Maarel, M.J.E.C. (author), Dijkhuizen, L. (author), TNO Voeding Centraal Instituut voor Voedingsonderzoek TNO (author)Lactobacillus reuteri strain 121 employs a fructosyltransferase (FTF) to synthesize a fructose polymer [a fructan of the levan type, with β(2→6) linkages] from sucrose or raffinose. Purification of this FTF (a levansucrase), and identification of peptide amino acid sequences, allowed isolation of the first Lactobacillus levansucrase gene (lev),...article 2004
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Majhenič, A.Č. (author), Venema, K. (author), Allison, G.E. (author), Matijašić, B.B. (author), Rogelj, I. (author), Klaenhammer, T.R. (author), TNO Voeding (author)Lactobacillus gasseri LF221, an isolate from the feces of a child, produces two bacteriocins. Standard procedures for molecular techniques were used to locate, clone and sequence the fragments of LF221 chromosomal DNA carrying the acidocin LF221 A and B structural genes, respectively. Sequencing analysis revealed the gene of acidocin LF221 A to...article 2004
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Role of bacterial virulence proteins in Agrobacterium-mediated transformation of Aspergillus awamoriMichielse, C.B. (author), Ram, A.F.J. (author), Hooykaas, P.J.J. (author), van den Hondel, C.A.M.J.J. (author), TNO Voeding (author)The Agrobacterium-mediated transformation of Aspergillus awamori was optimized using defined co-cultivation conditions, which resulted in a reproducible and efficient transformation system. Optimal co-cultivation conditions were used to study the role of Agrobacterium tumefaciens virulence proteins in T-DNA transfer. This study revealed that...article 2004
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TNO Voeding Centraal Instituut voor Voedingsonderzoek TNO (author), Ozimek, L.K. (author), van Hijum, S.A.F.T. (author), van Koningsveld, G.A. (author), van der Maarel, M.J.E.C. (author), van Geel-Schutten, G.H. (author), Dijkhuizen, L. (author)Bacterial fructosyltransferases (FTFs) are retaining-type glycosidases that belong to family 68 of glycoside hydrolases. Recently, the high-resolution 3D structure of the Bacillus subtilis levansucrase has been solved [Meng, G. and Futterer, K., Nat. Struct. Biol. 10 (2003) 935-941]. Based on this structure, the catalytic nucleophile, general...article 2004
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Peschel, A. (author), Jack, R.W. (author), Otto, M. (author), Collins, L.V. (author), Staubitz, P. (author), Nicholson, G. (author), Kalbacher, H. (author), Nieuwenhuizen, W.F. (author), Jung, G. (author), Tarkowski, A. (author), van Kessel, K.P.M. (author), van Strijp, J.A.G. (author)Defensins, antimicrobial peptides of the innate immune system, protect human mucosal epithelia and skin against microbial infections and are produced in large amounts by neutrophils. The bacterial pathogen Staphylococcus aureus is insensitive to defensins by virtue of an unknown resistance mechanism. We describe a novel staphylococcal gene, mprF...article 2001
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Centraal Instituut voor Voedingsonderzoek TNO TNO Voeding (author), van der Vlugt-Bergmans, C.J.B. (author), van der Werf, M.J. (author)A monoterpene ε-lactone hydrolase (MLH) from Rhodococcus erythropolis DCL14, catalyzing the ring opening of lactones which are formed during degradation of several monocyclic monoterpenes, including carvone and menthol, was purified to apparent homogeneity. It is a monomeric enzyme of 31 kDa that is active with (4R)-4-isopropenyl-7-methyl-2-oxo...article 2001
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Ahmad, S. (author), Amoudy, H.A. (author), Thole, J.E.R. (author), Young, D.B. (author), Mustafa, A.S. (author), TNO Preventie en Gezondheid (author)A genomic DNA region, designated RD1, that is present in virulent and clinical strains of Mycobacterium tuberculosis and M. bovis, has been shown to be deleted in bacillus Calmette Guerin (BCG). The DNA segments corresponding to three open reading frames (ORFs: ORF-10, ORF-14 and ORF-15) of the RD1 region, that are deleted in BCG strains, were...article 1999
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Martínez, B. (author), Fernández, M. (author), Suárez, J.E. (author), Rodríguez, A. (author), Centraal Instituut voor Voedingsonderzoek TNO (author)Synthesis of lactococcin 972 is plasmid-encoded. An operon composed of two genes that encode pre-bacteriocin and a putative immunity protein has been identified. The first gene encodes a 91-residue polypeptide that is exported via a sec-dependent system to give the mature 66-aa bacteriocin. The immunity protein is a 563-residue polypeptide with...article 1999
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Chaillou, S. (author), Lokman, B.C. (author), Leer, R.J. (author), Posthuma, C. (author), Postma, P.W. (author), Pouwels, P.H. (author)Two genes, xylP and xylQ, from the xylose regulon of Lactobacillus pentosus were cloned and sequenced. Together with the repressor gene of the regulon, xylR, the xylPQ genes form an operon which is inducible by xylose and which is transcribed from a promoter located 145 bp upstream of xylP. A putative xylR binding site (xylO) and a cre-like...article 1998
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Boot, H.J. (author), Kolen, C.P.A.M. (author), Pouwels, P.H. (author), Prins Maurits Laboratorium TNO (author)The most-dominant surface-exposed protein in many bacterial species is the S-protein. This protein crystallises into a regular monolayer on the outside surface of the bacteria: the S-layer. Lactobacillus acidophilus harbours two S-protein-encoding genes, slpA and slpB, only one of which (slpA) is expressed. In this study, we show by polymerase...article 1996
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Argnani, A. (author), Leer, R.J. (author), van Luijk, N. (author), Pouwels, P.H. (author), TNO Voeding (author)A protocol was developed for the introduction of foreign plasmid DNA into various Bifidobacterium strains. The method, which is applicable to all Bifidobacterium species tested so far, is based on electroporation of bacteria made competent by preincubation in electroporation buffer for several hours at 4°C. Transformation of Bifidobacterium...article 1996
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Wanker, E. (author), Leer, R.J. (author), Pouwels, P.H. (author), Schwab, H. (author), Centraal Instituut voor Voedingsonderzoek TNO (author)Two Lactobacillus-Escherichia coli shuttle vectors, harbouring the levanase gene from Bacillus subtilis under the control of its own promoter (pLPEW1) or behind the E. coli tac promoter (pE-SIEW2), were constructed. Lactobacillus plantarum showed the same growth characteristics on selective plates and in liquid media containing inulin, after...article 1995
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Leer, R.J. (author), van der Vossen, J.M.B.M. (author), van Giezen, M. (author), van Noort, J.M. (author), Pouwels, P.H. (author), Centraal Instituut voor Voedingsonderzoek TNO (author)The genes encoding the production of acidocin B, a bacteriocin produced by Lactobacillus acidophilus strain M46 which is active against Listeria monocytogenes, Clostridium sporogenes, Brochothrix thermosphacta, Lactobacillus fermentum and Lactobacillus delbrueckii subsp. bulgaricus, but inactive against most other Lactobacillus species, were...article 1995
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Lokman, B.C. (author), van Santen, P. (author), Verdoes, J.C. (author), Kruse, J. (author), Leer, R.J. (author), Posno, M. (author), Pouwels, P.H. (author), Medisch Biologisch Laboratorium TNO (author)A cluster of three genes involved in D-xylose catabolism (viz. xylose genes) in Lactobacillus pentosus has been cloned in Escherichia coli and characterized by nucleotide sequence analysis. The deduced gene products show considerable sequence similarity to a repressor protein involved in the regulation of expression of xylose genes in Bacillus...article 1991