- document
-
Nelson, G. (author), Kozlova-Zwinderman, O. (author), Collis, A.J. (author), Knight, M.R. (author), Fincham, J.R.S. (author), Stanger, C.P. (author), Renwick, A. (author), Hessing, J.G.M. (author), Punt, P.J. (author), van den Hondel, C.A.M.J.J. (author), Read, N.D. (author), TNO Voeding Centraal Instituut voor Voedingsonderzoek TNO (author)Calcium signalling is little understood in filamentous fungi largely because easy and routine methods for calcium measurement in living hyphae have previously been unavailable. We have developed the recombinant aequorin method for this purpose. High levels of aequorin expression were obtained in Neurospora crassa, Aspergillus niger and...article 2004
- document
-
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
- document
-
Al-Sheikh, H. (author), Watson, A.J. (author), Lacey, G.A. (author), Punt, P.J. (author), MacKenzie, D.A. (author), Jeenes, D.J. (author), Pakula, T. (author), Penttilä, M. (author), Alcocer, M.J.C. (author), Archer, D.B. (author), TNO Voeding (author)We describe a new endoplasmic reticulum (ER)-associated stress response in the filamentous fungus Aspergillus niger. The inhibition of protein folding within the ER leads to cellular responses known collectively as the unfolded protein response (UPR) and we show that the selective transcriptional downregulation of the gene encoding glucoamylase,...article 2004
- document
-
TNO Voeding Centraal Instituut voor Voedingsonderzoek TNO (author), Levasseur, A. (author), Pagès, S. (author), Fierobe, H.P. (author), Navarro, D. (author), Punt, P. (author), Belaïch, J.P. (author), Asther, M. (author), Record, E. (author)A chimeric enzyme associating feruloyl esterase A (FAEA) from Aspergilhis niger and dockerin from Clostridium thermocellum was produced in A. niger. A completely truncated form was produced when the dockerin domain was located downstream of the FAEA (FAEA-Doc), whereas no chimeric protein was produced when the bacterial dockerin domain was...article 2004
- document
-
Joosten, V. (author), Lokman, C. (author), van den Hondel, C.A.M.J.J. (author), Punt, P.J. (author), TNO Voeding (author)In this review we will focus on the current status and views concerning the production of antibody fragments and antibody fusion proteins by yeasts and filamentous fungi. We will focus on single-chain antibody fragment production (scFv and VHH) by these lower eukaryotes and the possible applications of these proteins. Also the coupling of...article 2003
- document
-
Record, E. (author), Asther, M. (author), Sigoillot, C. (author), Pagès, S. (author), Punt, P.J. (author), Delattre, M. (author), Haon, M. (author), van den Hondel, C.A.M.J.J. (author), Sigoillot, J.C. (author), Lesage-Meessen, L. (author), Asther, M. (author), TNO Voeding (author)A well-known industrial fungus for enzyme production, Aspergillus niger, was selected to produce the feruloyl esterase FAEA by homologous overexpression for pulp bleaching application. The gpd gene promoter was used to drive FAEA expression. Changing the nature and concentration of the carbon source nature (maltose to glucose; from 2.5 to 60 g l...article 2003
- document
-
Punt, P.J. (author), Drint-Kuijvenhoven, A. (author), Lokman, B.C. (author), Spencer, J.A. (author), Jeenes, D. (author), Archer, D.A. (author), van den Hondel, C.A.M.J.J. (author)We have characterized growth and protein processing characteristics of Aspergillus niger strains carrying a disrupted allele of the previously cloned and characterized kexB gene [Appl. Environ. Microbiol. 66 (2000) 363] encoding a furin-type endoprotease. Deletion of the single-copy gene confirms it to be non-essential but disruptant strains...article 2003
- document
-
Lokman, B.C. (author), Joosten, V. (author), Hovenkamp, J. (author), Gouka, R.J. (author), Verrips, C.T. (author), van den Hondel, C.A.M.J.J. (author)The heterologous production of Arthromyces ramosus peroxidase (ARP) was analysed in the filamentous fungus Aspergillus awamori under control of the inducible endoxylanase promoter. Secretion of active ARP was achieved up to 800 mg l-1 in shake flask cultures. Western blot analysis showed that an rARP product of the correct molecular weight was...article 2003
- document
-
TNO Voeding Centraal Instituut voor Voedingsonderzoek TNO (author), Yi, X. (author), Conesa, A. (author), Punt, P.J. (author), Hager, L.P. (author)Site-directed mutagenesis has been used to investigate the role of glutamic acid 183 in chloroperoxidase catalysis. Based on the x-ray crystallographic structure of chloroperoxidase, Glu-183 is postulated to function on distal side of the heme prosthetic group as an acid-base catalyst in facilitating the reaction between the peroxidase and...article 2003
- document
-
te Biesebeke, R. (author), Ruijter, G. (author), Rahardjo, Y.S.P. (author), Hoogschagen, M.J. (author), Heerikhuisen, M. (author), Levin, A. (author), van Driel, K.G.A. (author), Schutyser, M.A.I. (author), Dijksterhuis, J. (author), Zhu, Y. (author), Weber, F.J. (author), de Vos, W.M. (author), van den Hondel, K.A.M.J.J. (author), Rinzema, A. (author), Punt, P.J. (author)We report the progress of a multi-disciplinary research project on solid-state fermentation (SSF) of the filamentous fungus Aspergillus oryzae. The molecular and physiological aspects of the fungus in submerged fermentation (SmF) and SSF are compared and we observe a number of differences correlated with the different growth conditions. First,...article 2002
- document
-
Record, E. (author), Punt, P.J. (author), Chamkha, M. (author), Labat, M. (author), van den Hondel, C.A.M.J.J. (author), Asther, M. (author), Centraal Instituut voor Voedingsonderzoek TNO (author)Pycnoporus cinnabarinus laccase lac1 gene was overexpressed in Aspergillus niger, a well-known fungal host producing a large amount of homologous or heterologous enzymes for industrial applications. The corresponding cDNA was placed under the control of the glyceraldehyde-3-phosphate dehydrogenase promoter as a strong and constitutive promoter....article 2002
- document
-
Punt, P.J. (author), van Biezen, N. (author), Conesa, A. (author), Albers, A. (author), Mangnus, J. (author), van den Hondel, C. (author), Centraal Instituut voor Voedingsonderzoek TNO (author)Filamentous fungi have been used as sources of metabolites and enzymes for centuries. For about two decades, molecular genetic tools have enabled us to use these organisms to express extra copies of both endogenous and exogenous genes. This review of current practice reveals that molecular tools have enabled several new developments. But it has...article 2002
- document
-
Centraal Instituut voor Voedingsonderzoek TNO TNO Voeding (author), de Vries, R.P. (author), Jansen, J. (author), Aguilar, G. (author), Parenicová, L. (author), Joosten, V. (author), Wülfert, F. (author), Benen, J.A.E. (author), Visser, J. (author)The expression of 26 pectinolytic genes from Aspergillus niger was studied in a wild type strain and a CreA derepressed strain, under 16 different growth conditions, to obtain an expression profile for each gene. These expression profiles were then submitted to cluster analysis to identify subsets of genes with similar expression profiles. With...article 2002
- document
-
TNO Voeding Centraal Instituut voor Voedingsonderzoek TNO (author), Conesa, A. (author), Jeenes, D. (author), Archer, D.B. (author), van den Hondel, C.A.M.J.J. (author), Punt, P.J. (author)Heme-containing peroxidases from white rot basidiomycetes, in contrast to most proteins of fungal origin, are poorly produced in industrial filamentous fungal strains. Factors limiting peroxidase production are believed to operate at the posttranslational level. In particular, insufficient availability of the prosthetic group which is required...article 2002
- document
-
Centraal Instituut voor Voedingsonderzoek TNO (author), de Vries, R. (author), van de Vondervoort, P.J.I. (author), Hendriks, L. (author), van de Belt, M. (author), Visser, J. (author)The α-glucuronidase gene aguA from Aspergillus niger was cloned and characterised. Analysis of the promoter region of aguA revealed the presence of four putative binding sites for the major carbon catabolite repressor protein CREA and one putative binding site for the transcriptional activator XLNR. In addition, a sequence motif was detected...article 2002
- document
-
Punt, P.J. (author), Seiboth, B. (author), Weenink, X.O. (author), van Zeijl, C. (author), Lenders, M. (author), Konetschny, C. (author), Ram, A.F.J. (author), Montijn, R. (author), Kubicek, C.P. (author), van den Hondel, C.A.M.J.J. (author), Centraal Instituut voor Voedingsonderzoek TNO (author)DNA fragments containing genetic information for five secretion-related small GTPases of Aspergillus niger (srgA-E) were isolated and identified as members of different Rab/Ypt subfamilies. This isolation and the search for similar sequences in fungal genomic and EST databases showed that, in contrast to Saccharomyces cerevisiae, filamentous...article 2001
- document
-
Hoogschagen, M. (author), Zhu, Y. (author), van As, H. (author), Tramper, J. (author), Rinzema, A. (author), Centraal Instituut voor Voedingsonderzoek TNO (author)The respiration kinetics of Aspergillus oryzae on different varieties of whole wheat kernels were studied. Six wheat varieties were pretreated in two different ways. Five of the six substrates fermented similarly and independently of the pretreatment method. However, pretreatment affected fermentation of one variety of soft wheat (Apollo). T21H...article 2001
- document
-
Centraal Instituut voor Voedingsonderzoek TNO TNO Voeding (author), Conesa, A. (author), Weelink, G. (author), van den Hondel, C.A.M.J.J. (author), Punt, P.J. (author)The Caldariomyces fumago chloroperoxidase (CPO) is synthesised as a 372-aa precursor which undergoes two proteolytic processing events: removal of a 21-aa N-terminal signal peptide and of a 52-aa C-terminal propeptide. The Aspergillus niger expression system developed for CPO was used to get insight into the function of this C-terminal...article 2001
- document
-
Centraal Instituut voor Voedingsonderzoek TNO TNO Voeding (author), Conesa, A. (author), van de Velde, F. (author), van Rantwijk, F. (author), Sheldon, R.A. (author), van den Hondel, C.A.M.J.J. (author), Punt, P.J. (author)The Caldariomyces fumago chloroperoxidase was successfully expressed in Aspergillus niger. The recombinant enzyme was produced in the culture medium as an active protein and could be purified by a three-step purification procedure. The catalytic behavior of recombinant chloroperoxidase (rCPO) was studied and compared with that of native CPO. The...article 2001
- document
-
Swift, R.J. (author), Karandikar, A. (author), Griffen, A.M. (author), Punt, P.J. (author), van den Hondel, C.A.M.J.J. (author), Robson, G.D. (author), Trinci, A.P.J. (author), Wiebe, M.G. (author), Centraal Instituut voor Voedingsonderzoek TNO (author)Aspergillus niger B1, a recombinant strain carrying 20 extra copies of the native glucoamylase gene, was grown in glucose-limited chemostat cultures supplemented with various organic nitrogen sources (dilution rate 0.12 ± 0.01 h-1, pH 5.4). In cultures supplemented with L-alanine, L-methionine, casamino acids, or peptone, specific glucoamylase ...article 2000