Keyword search (3,448 papers available)


Deletion of the Aspergillus niger Pro-Protein Processing Protease Gene kexB Results in a pH-Dependent Morphological Transition during Submerged Cultivations and Increases Cell Wall Chitin Content.

Author(s): van Leeuwe TM, Arentshorst M, Forn-Cuní G, Geoffrion N, Tsang A, Delvigne F, Meijer AH, Ram AFJ, Punt PJ...

There is a growing interest in the use of post-fermentation mycelial waste to obtain cell wall chitin as an added-value product. In the pursuit to identify suitable production strains that can be u...

Article GUID: 33276589
A set of isogenic auxotrophic strains for constructing multiple gene deletion mutants and parasexual crossings in Aspergillus niger.

Author(s): Niu J, Arentshorst M, Seelinger F, Ram AF, Ouedraogo JP

Arch Microbiol. 2016 Nov;198(9):861-8 Authors: Niu J, Arentshorst M, Seelinger F, Ram AF, Ouedraogo JP

Article GUID: 27251039
An Evolutionarily Conserved Transcriptional Activator-Repressor Module Controls Expression of Genes for D-Galacturonic Acid Utilization in Aspergillus niger.

Author(s): Niu J, Alazi E, Reid ID, Arentshorst M, Punt PJ, Visser J, Tsang A, Ram AF

Genetics. 2017 01;205(1):169-183 Authors: Niu J, Alazi E, Reid ID, Arentshorst M, Punt PJ, Visser J, Tsang A, Ram AF

Article GUID: 28049705
The pathway intermediate 2-keto-3-deoxy-L-galactonate mediates the induction of genes involved in D-galacturonic acid utilization in Aspergillus niger.

Author(s): Alazi E, Khosravi C, Homan TG, du Pré S, Arentshorst M, Di Falco M, Pham TTM, Peng M, Aguilar-Pontes MV, Visser J, Tsang A, de Vries RP, Ram AFJ

FEBS Lett. 2017 05;591(10):1408-1418 Authors: Alazi E, Khosravi C, Homan TG, du Pré S, Arentshorst M, Di Falco M, Pham TTM, Peng M, Aguilar-Pontes MV, Visser J, Tsang A, de Vries RP, Ram AFJ

Article GUID: 28417461
W361R mutation in GaaR, the regulator of D-galacturonic acid-responsive genes, leads to constitutive production of pectinases in Aspergillus niger.

Author(s): Alazi E, Niu J, Otto SB, Arentshorst M, Pham TTM, Tsang A, Ram AFJ

Microbiologyopen. 2019 May;8(5):e00732 Authors: Alazi E, Niu J, Otto SB, Arentshorst M, Pham TTM, Tsang A, Ram AFJ

Article GUID: 30298571
Title:A set of isogenic auxotrophic strains for constructing multiple gene deletion mutants and parasexual crossings in Aspergillus niger.
Authors:Niu J,  Arentshorst M,  Seelinger F,  Ram AF,  Ouedraogo JP
Link:https://www.ncbi.nlm.nih.gov/pubmed/27251039?dopt=Abstract
DOI:10.1007/s00203-016-1240-6
Category:Arch Microbiol
PMID:27251039
Dept Affiliation: GENOMICS
1 Molecular Microbiology and Biotechnology, Institute of Biology Leiden, Leiden University, Sylviusweg 72, 2333 BE, Leiden, The Netherlands.
2 Molecular Microbiology and Biotechnology, Institute of Biology Leiden, Leiden University, Sylviusweg 72, 2333 BE, Leiden, The Netherlands. a.f.j.ram@biology.leidenuniv.nl.
3 Centre for Structural and Functional Genomics, Concordia University, 7141 Sherbrooke St. W., Montreal, QC, H4B 1R6, Canada.

Description:

A set of isogenic auxotrophic strains for constructing multiple gene deletion mutants and parasexual crossings in Aspergillus niger.

Arch Microbiol. 2016 Nov;198(9):861-8

Authors: Niu J, Arentshorst M, Seelinger F, Ram AF, Ouedraogo JP

Abstract

To construct a set of isogenic auxotrophic strains in Aspergillus niger suited for creating multiple gene deletion mutants and executing parasexual crossings, we have combined mutations in genes involved in colour pigmentation (fwnA and olvA) with well-selectable auxotrophic markers (pyrG, nicB, argB, and adeA). All markers, except for the pyrG marker, were introduced by targeted deletion, omitting UV mutagenesis of the strains. Aspergillus oryzae orthologous genes of the argB, nicB, and adeA markers were used as heterologous selection markers, and all markers were shown to complement to respective auxotrophic A. niger mutants. A quadruple auxotrophic marker was further constructed suitable for multiple gene deletions. Genome sequencing of two auxotrophic colour mutants JN3.2 (olvA::pyrG, argB::hygB) and JN6.2 (olvA::pyrG, nicB::hygB) revealed four SNPs between them in non-coding regions, indicating a high level of isogenicity between both strains. The availability of near-isogenic complementary auxotrophic colour mutants facilitates the selection of diploids and the isolation of haploid segregants from the diploid using the parasexual cycle.

PMID: 27251039 [PubMed - indexed for MEDLINE]