The relationship between carotenoids and sunlight response in members of the family <i>Micrococcaceae</i>

Pezzoni, Magdalena; Costa, Cristina; Pizarro, Ramón A.; Oppezzo, Oscar J.

doi:10.1002/jobm.201000223

Cited by 3 publications

(2 citation statements)

References 33 publications

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“…The biological function of carotenoids in nonphototrophic microorganisms is primarily in the roles of oxidative stress relief and membrane stability (Britton, 1995). As powerful antioxidants, carotenoid biosynthesis has been shown to respond to activated oxygen species under conditions such as high copper concentration, light irradiation and biofilm formation (Moraleda-Munoz et al, 2005;Takano et al, 2005;Pezzoni et al, 2011;Galbis-Martinez et al, 2012;Zheng et al, 2013). Carotenoids are often localized to cell membranes, where their influence on membrane fluidity is a function of the molecule's exact structure (Lutnaes et al, 2004;Gruszecki, 2009;Dieser et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Sioxanthin, a novel glycosylated carotenoid, reveals an unusual subclustered biosynthetic pathway

Richter

Hughes

Moore

2014

Environmental Microbiology

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Summary Members of the marine actinomycete genus Salinispora constitutively produce a characteristic orange pigment during vegetative growth. Contrary to the understanding of widespread carotenoid biosynthesis pathways in bacteria, Salinispora carotenoid biosynthesis genes are not confined to a single cluster. Instead, bioinformatic and genetic investigations confirm that four regions of the S. tropica CNB-440 genome, consisting of two gene clusters and two independent genes, contribute to the in vivo production of a single carotenoid. This compound, namely (2’S)-1’-(β-D-glucopyranosyloxy)-3’,4’-didehydro-1’,2’-dihydro-φ,ψ-caroten-2’-ol, is novel and has been given the trivial name “sioxanthin”. Sioxanthin is a C40-carotenoid, glycosylated on one end of the molecule and containing an aryl moiety on the opposite end. Glycosylation is unusual amongst actinomycete carotenoids, and sioxanthin joins a rare group of carotenoids with polar and non-polar head groups. Gene sequence homology predicts that the sioxanthin biosynthetic pathway is present in all of the Salinispora as well as other members of the family Micromonosporaceae. Additionally, this study’s investigations of clustering of carotenoid biosynthetic genes in heterotrophic bacteria show that a non-clustered genome arrangement is more common than previously suggested, with nearly half of the investigated genomes showing a non-clustered architecture.

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Section: Introductionmentioning

confidence: 99%

Sioxanthin, a novel glycosylated carotenoid, reveals an unusual subclustered biosynthetic pathway

Richter

Hughes

Moore

2014

Environmental Microbiology

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“…Light of different qualities could also influence cellular components, such as amino acids , pigments , and sterol content . Experiments on H. ostrearia demonstrated that light intensity and quality could regulate its pigmentation , and more cellular production was detected under BL .…”

Section: Introductionmentioning

confidence: 99%

Settlement and cell division of diatomNaviculacan be influenced by light of various qualities and intensities

Cao

Wang

Chen

2013

J. Basic Microbiol.

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Diatom settlement and cell division is important in two major aspects. Firstly, biofouling is a costly problem in the shipping industry that necessitates the effective inhibition of diatom settlement and proliferation. Secondly, biological coatings on the basis of ordered and densely packed cell lawns of diatom are useful for nano- and biotechnology. This study demonstrated that the settlement and cell division of the marine unicellular diatom Navicula sp. can be influenced by light-emitting diodes of various light qualities and intensities. Except for blue light, the settlement of diatoms was reduced by weak (approx. 0.14-6 µE m(-2) s(-1)) green, yellow or red light. When the irradiance intensity, however, was higher than 8-9 µE m(-2) s(-1), the settlement was stimulated. This phenomenon could be explained by the hypothesis of spatial interference between a chloroplast and a holdfast-like structure. Densely packed lawn of diatoms with uniform distribution can be fabricated for nanotechnologies, using blue light that stimulates diatom cell division.

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Lowbush Wild Blueberries have the Potential to Modify Gut Microbiota and Xenobiotic Metabolism in the Rat Colon

Lacombe

Klimis‐Zacas

et al. 2013

PLoS ONE

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The gastrointestinal tract is populated by an array of microbial species that play an important role in metabolic and immune functions. The composition of microorganisms is influenced by the components of the host’s diet and can impact health. In the present study, dietary enrichment of lowbush wild blueberries (LWB) was examined to determine their effect on colon microbial composition and their potential in promoting gut health. The microbial composition and functional potential of the colon microbiota from Sprague Dawley rats fed control diets (AIN93) and LWB-enriched diets (AIN93+8% LWB powder substituting for dextrose) for 6 weeks were assessed using Illumina shotgun sequencing and bioinformatics tools. Our analysis revealed an alteration in the relative abundance of 3 phyla and 22 genera as representing approximately 14 and 8% of all phyla and genera identified, respectively. The LWB-enriched diet resulted in a significant reduction in the relative abundance of the genera Lactobacillus and Enterococcus. In addition, hierarchal analysis revealed a significant increase in the relative abundance of the phylum Actinobacteria, the order Actinomycetales, and several novel genera under the family Bifidobacteriaceae and Coriobacteriaceae, in the LWB group. Functional annotation of the shotgun sequences suggested that approximately 9% of the 4709 Kyoto Encyclopaedia of Gene and Genome (KEGG) hits identified were impacted by the LWB-diet. Open Reading Frames (ORFs) assigned to KEGG category xenobiotics biodegradation and metabolism were significantly greater in the LWB-enriched diet compared to the control and included the pathway for benzoate degradation [PATH:ko00362] and glycosaminoglycan degradation [PATH:ko00531]. Moreover, the number of ORFs assigned to the bacterial invasion of epithelial cells [PATH:ko05100] pathway was approximately 8 fold lower in the LWB group compared to controls. This study demonstrated that LWBs have the potential to promote gut health and can aid in the development of optimal diets.

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The relationship between carotenoids and sunlight response in members of the family Micrococcaceae

Cited by 3 publications

References 33 publications

Sioxanthin, a novel glycosylated carotenoid, reveals an unusual subclustered biosynthetic pathway

Sioxanthin, a novel glycosylated carotenoid, reveals an unusual subclustered biosynthetic pathway

Settlement and cell division of diatomNaviculacan be influenced by light of various qualities and intensities

Lowbush Wild Blueberries have the Potential to Modify Gut Microbiota and Xenobiotic Metabolism in the Rat Colon

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