A comprehensive and comparative phenotypic analysis of the collaborative founder strains identifies new and known phenotypes.
Cast your vote
You can rate an item by clicking the amount of stars they wish to award to this item.
When enough users have cast their vote on this item, the average rating will also be shown.
Your vote was cast
Thank you for your feedback
Thank you for your feedback
Bogue, Molly A
Östereicher, Manuela A
Aguilar-Pimentel, Juan Antonio
Amarie, Oana Veronica
Hölter, Sabine M
Yildirim, Ali Önder
Hrabě de Angelis, Martin
MetadataShow full item record
AbstractMyxococcus xanthus DK1622 is known as a proficient producer of different kinds of secondary metabolites (SM) with various biological activities, including myxovirescin A, myxalamide A, myxochromide A and DKxanthene. Low production of SM in the wild type bacteria makes searching for production optimization methods highly desirable. Identification and induction of endogenous key molecular feature(s) regulating the production level of the metabolites remain promising, while heterologous expression of the biosynthetic genes is not always efficient because of various complicating factors including codon usage bias. This study established proteomic and molecular approaches to elucidate the regulatory roles of the ROK regulatory protein in the modification of secondary metabolite biosynthesis. Interestingly, the results revealed that rok inactivation significantly reduced the production of the SM and also changed the motility in the bacteria. Electrophoretic mobility shift assay using purified ROK protein indicated a direct enhancement of the promoters encoding transcription of the DKxanthene, myxochelin A, and myxalamide A biosynthesis machinery. Comparative proteomic analysis by two-dimensional fluorescence difference in-gel electrophoresis (2D-DIGE) was employed to identify the protein profiles of the wild type and rok mutant strains during early and late logarithmic growth phases of the bacterial culture. Resulting data demonstrated overall 130 differently altered proteins by the effect of the rok gene mutation, including putative proteins suspected to be involved in transcriptional regulation, carbohydrate metabolism, development, spore formation, and motility. Except for a slight induction seen in the production of myxovirescin A in a rok over-expression background, no changes were found in the formation of the other SM. From the outcome of our investigation, it is possible to conclude that ROK acts as a pleiotropic regulator of secondary metabolite formation and development in M. xanthus, while its direct effects still remain speculative. More experiments are required to elucidate in detail the variable regulation effects of the protein and to explore applicable approaches for generating valuable SM in this bacterium.
CitationMammalian genome : official journal of the International Mammalian Genome Society JID - 9100916.
AffiliationHZI,Helmholtz-Zentrum für Infektionsforschung GmbH, Inhoffenstr. 7,38124 Braunschweig, Germany.
The following license files are associated with this item:
- Creative Commons
Except where otherwise noted, this item's license is described as Attribution-NonCommercial-ShareAlike 4.0 International
- Influenza H3N2 infection of the collaborative cross founder strains reveals highly divergent host responses and identifies a unique phenotype in CAST/EiJ mice.
- Authors: Leist SR, Pilzner C, van den Brand JM, Dengler L, Geffers R, Kuiken T, Balling R, Kollmus H, Schughart K
- Issue date: 2016 Feb 27
- Islet proteomics reveals genetic variation in dopamine production resulting in altered insulin secretion.
- Authors: Mitok KA, Freiberger EC, Schueler KL, Rabaglia ME, Stapleton DS, Kwiecien NW, Malec PA, Hebert AS, Broman AT, Kennedy RT, Keller MP, Coon JJ, Attie AD
- Issue date: 2018 Apr 20
- The Collaborative Cross mouse model for dissecting genetic susceptibility to infectious diseases.
- Authors: Abu Toamih Atamni H, Nashef A, Iraqi FA
- Issue date: 2018 Aug
- The Founder Strains of the Collaborative Cross Express a Complex Combination of Advantageous and Deleterious Traits for Male Reproduction.
- Authors: Odet F, Pan W, Bell TA, Goodson SG, Stevans AM, Yun Z, Aylor DL, Kao CY, McMillan L, de Villena FP, O'Brien DA
- Issue date: 2015 Oct 19
- Genetic mapping in Diversity Outbred mice identifies a Trpa1 variant influencing late-phase formalin response.
- Authors: Recla JM, Bubier JA, Gatti DM, Ryan JL, Long KH, Robledo RF, Glidden NC, Hou G, Churchill GA, Maser RS, Zhang ZW, Young EE, Chesler EJ, Bult CJ
- Issue date: 2019 Aug