keyword
https://read.qxmd.com/read/32912909/complete-genome-sequence-of-the-carotenoid-producing-strain-gordonia-ajoucoccus-a2
#1
JOURNAL ARTICLE
Soon Jae Kwon, Yong Jin Choi, Ju Min Kim, Pyung Cheon Lee
Gordonia ajoucoccus strain A2, isolated from crude oil-contaminated soils, synthesizes yellow keto-γ-carotene from various n -alkanes as the sole carbon source. Its complete genome sequence consists of a single circular chromosome (5,090,254 bp, 67.3% G+C content). Seven putative genes were identified supporting the proposed keto-γ-carotene pathway of G. ajoucoccus A2.
September 10, 2020: Microbiology Resource Announcements
https://read.qxmd.com/read/32377360/transcriptome-analysis-and-metabolic-profiling-reveal-the-key-role-of-carotenoids-in-the-petal-coloration-of-liriodendron-tulipifera
#2
JOURNAL ARTICLE
Zhaodong Hao, Siqin Liu, Lingfeng Hu, Jisen Shi, Jinhui Chen
Liriodendron tulipifera , also known as tuliptree, is a popular ornamental horticultural plant with extraordinary tulip-shaped flowers characterized by an orange band near their base. The mechanisms underlying petal band-specific pigmentation during L. tulipifera flower development are unclear. Here, we combined nontargeted and targeted metabolomics and transcriptomics to identify a pathway cascade leading to carotenoid biosynthesis that is specifically activated in the petal band. The comparative analysis of carotenoid metabolites between L...
2020: Horticulture Research
https://read.qxmd.com/read/32275417/high-yield-production-of-lycopene-from-corn-steep-liquor-and-glycerol-using-the-metabolically-engineered-deinococcus-radiodurans-r1-strain
#3
JOURNAL ARTICLE
Chang Keun Kang, Sun-Wook Jeong, Jung Eun Yang, Yong Jun Choi
Developing a highly efficient and ecofriendly system to produce desired products from waste can be considered important to a sustainable society. Here, we report for the first time high-yield production of lycopene through metabolically engineering an extremophilic microorganism, Deinococcus radiodurans R1, from corn steep liquor (CSL) and glycerol. First, the crtLm gene-encoding lycopene cyclase was deleted to prevent the conversion of lycopene to γ-carotene. Then, the crtB gene-encoding phytoene synthase and the dxs gene-encoding 1-deoxy-d-xylulose 5-phosphate synthase were overexpressed to increase carbon flux toward lycopene...
May 6, 2020: Journal of Agricultural and Food Chemistry
https://read.qxmd.com/read/32224594/carotenogenesis-in-cyanobacteria-crua-crup-type-and-crtl-type-lycopene-cyclases
#4
JOURNAL ARTICLE
Kenjiro Sugiyama, Shinichi Takaichi
Cyanobacteria are oxygenic photoautotrophic prokaryotes containing chlorophylls and carotenoids, and the latter play important roles in light-harvesting, protection of excess light, assembly of pigment-protein complexes, and stabilization of lipid membranes. Cyanobacteria produce many kinds of carotenoids, such as β-carotene, zeaxanthin, echinenone, and myxol glycosides, which have a cyclic structure at one or both end(s). Cyclization of lycopene is a branch point in carotenoid biosynthesis to β-carotene and γ-carotene...
March 28, 2020: Journal of General and Applied Microbiology
https://read.qxmd.com/read/32117174/synthesis-regulation-and-degradation-of-carotenoids-under-low-level-uv-b-radiation-in-the-filamentous-cyanobacterium-chlorogloeopsis-fritschii-pcc-6912
#5
JOURNAL ARTICLE
Carole A Llewellyn, Ruth L Airs, Garry Farnham, Carolyn Greig
Carotenoids in cyanobacteria play an important role in protecting against and in repairing damage against low level UV-B radiation. Here we use transcriptomics and metabolomic HPLC pigment analysis to compare carotenoid pathway regulation in the filamentous cyanobacterium Chlorogloeopsis fritschii PCC 6912 exposed to white light and to white light supplemented with low level UV-B. Under UV-B changes in carotenoid transcription regulation were found associated with carotenogenesis (carotenoid synthesis), photoprotection and carotenoid cleavage...
2020: Frontiers in Microbiology
https://read.qxmd.com/read/32017256/analysis-of-carotenoid-profile-changes-and-carotenogenic-genes-transcript-levels-in-rhodosporidium-toruloides-mutants-from-an-optimized-agrobacterium-tumefaciens-mediated-transformation-method
#6
JOURNAL ARTICLE
Zeping Sun, Jing Lv, Chaofan Ji, Huipeng Liang, Shengjie Li, Zhaoxia Yang, Wenhuan Xu, Sufang Zhang, Xinping Lin
Rhodosporidium toruloides has been reported as a potential biotechnological microorganism to produce carotenoids. The most commonly used molecular and genetic manipulation methods based on Agrobacterium-mediated transformation (ATMT). However, this method was of relatively lower transformation efficiency. In this study, we optimized the ATMT method for R. toruloides on account of the promoter on T-DNA, the ratio of A. tumefaciens to R. toruloides NP11, acetosyringone concentration, co-cultivation temperature and time, and a transformation efficiency of 2369 cells per 10^5 recipient cells was obtained and was 24 times as that of the previous report...
February 4, 2020: Biotechnology and Applied Biochemistry
https://read.qxmd.com/read/31780956/characterization-of-the-geranylgeranyl-diphosphate-synthase-gene-in-acyrthosiphon-pisum-hemiptera-aphididae-and-its-association-with-carotenoid-biosynthesis
#7
JOURNAL ARTICLE
Bi-Yue Ding, Jinzhi Niu, Feng Shang, Li Yang, Teng-Yu Chang, Jin-Jun Wang
Carotenoids play many crucial roles in organisms. Recently, the de novo synthesis of carotenoids has been reported in pea aphid ( Acyrthosiphon pisum ) through horizontally transferred genes. However, their upstream pathway in the pea aphid is poorly understood. Geranylgeranyl diphosphate synthase (GGPPS) is the functional enzyme in the synthesis of geranylgeranyl diphosphate (GGPP) which is a precursor for the biosynthesis of many biological metabolites, including carotenoid synthesis. In this study, we performed a series of experiments to characterize GGPPS gene and its association with carotenoid biosynthesis...
2019: Frontiers in Physiology
https://read.qxmd.com/read/31724748/metabolomic-profiling-of-carotenoid-constituents-in-physalis-peruviana-during-different-growth-stages-by-lc-ms-ms-technology
#8
JOURNAL ARTICLE
Yougui Yu, Xuepeng Chen, Qing Zheng
With the current ongoing changes in global food demands, natural carotenoids are preferred by consumers and are gaining attention among food scientists and producers alike. Metabolomic profiling of carotenoid constituents in Physalis peruviana during distinct on-tree growth stages was performed with liquid chromatography-tandem mass spectrometry (LC-MS/MS) technology. The results show that the β rings of β-carotene are hydroxylated with great efficiency, and there is a continual synthesis of zeaxanthin at half-ripe and full-ripe stages, which is confirmed by relating the zeaxanthin content to that of its precursor (β-carotene)...
November 14, 2019: Journal of Food Science
https://read.qxmd.com/read/31054244/-candidatus-oscillochloris-fontis-a-novel-mesophilic-phototrophic-chloroflexota-bacterium-belonging-to-the-ubiquitous-oscillochloris-genus
#9
JOURNAL ARTICLE
Vasil A Gaisin, Ekaterina I Burganskaya, Denis S Grouzdev, Natalya S Osipova, Aleksandr A Ashikhmin, Maria A Sinetova, Maria S Krutkina, Irina A Bryantseva, Marina V Sukhacheva, Tatiana V Kochetkova, Veronika V Koziaeva, Aleksandr M Kalashnikov, Vladimir M Gorlenko
We present the results of a study of mesophilic anoxygenic phototrophic Chloroflexota bacteria from Mechigmen hot spring (the Chukotka Peninsula) and Siberia. According to 16S rRNA phylogenetic analysis, these bacteria belong to Oscillochloris trichoides. However, sequencing the draft genome of the bacterium from the Chukotka and analysis of the average nucleotide identity, as well as in silico DNA-DNA hybridization, reveal that this bacterium belongs to a novel species within the Oscillochloris genus. We, therefore, propose 'Candidatus Oscillochloris fontis' as a novel taxon to represent this mesophilic alkaliphilic anaerobic anoxygenic phototrophic bacterium...
May 4, 2019: FEMS Microbiology Letters
https://read.qxmd.com/read/31050593/study-on-the-wall-breaking-method-of-carotenoids-producing-yeast-sporidiobolus-pararoseus-and-the-antioxidant-effect-of-four-carotenoids-on-sk-hep-1-cells
#10
JOURNAL ARTICLE
Chang Liu, Yuliang Cheng, Chao Du, Tianqi Lv, Yahui Guo, Mei Han, Fuwei Pi, Weiguo Zhang, He Qian
The cell wall of carotenoids producing yeast Sporidiobolus pararoseus was broken through five different methods: acid-heating method, dimethyl sulfoxide (DMSO) method, enzymatic method, high-pressure homogenization (HPH) method, and cell autolysis method. HPH method not only brought the optimum breaking effect (wall-breaking extent of 72.3%) and the highest carotenoid extraction rate (67.2%), but also had the advantages of short-time, simple process, safe, and pollution-free. After optimization, the wall-breaking extent and the carotenoid extraction rate were enhanced to 78...
May 3, 2019: Preparative Biochemistry & Biotechnology
https://read.qxmd.com/read/30856706/biosynthetic-pathway-of-carotenoids-in-rhodotorula-and-strategies-for-enhanced-their-production
#11
REVIEW
Wei Tang, Yue Wang, Jun Zhang, Yali Cai, Zengguo He
Rhodotorula is a group of pigment-producing yeasts well known for its intracellular biosynthesis of carotenoids such as β-carotene, γ-carotene, torulene and torularhodin. The great potential of carotenoids in applications in food and feed as well as in health products and cosmetics has generated a market value expected to reach over $2.0 billion by 2022. Due to growing public concern over food safety, the demand for natural carotenoids is rising, and this trend significantly encourages the use of microbial fermentation for natural carotenoid production...
April 28, 2019: Journal of Microbiology and Biotechnology
https://read.qxmd.com/read/30836233/carotenoid-complement-of-rust-spores-variation-among-species-and-pathotype
#12
JOURNAL ARTICLE
Erpei Wang, Chongmei Dong, Robert F Park, Thomas H Roberts
Rust fungi, which are responsible for some of the world's most destructive plant diseases, are named for the distinctive rusty colour of one or more of their spore forms. Rust spore pigments are thought to provide protection against UV radiation and oxidative stress, and may act as virulence factors. However, with the exception of daisy rust spores, the identity and relative abundance of the carotenoids in the rust spore cytoplasm have not been investigated using modern analytical methods, and little is known about the dependence of the carotenoid complement on species, pathotype, spore-colour mutations and season...
March 2, 2019: Phytochemistry
https://read.qxmd.com/read/30801645/-candidatus-viridilinea-mediisalina-a-novel-phototrophic-chloroflexi-bacterium-from-a-siberian-soda-lake
#13
JOURNAL ARTICLE
Vasil A Gaisin, Ekaterina I Burganskaya, Denis S Grouzdev, Aleksandr A Ashikhmin, Nadezda A Kostrikina, Irina A Bryantseva, Veronika V Koziaeva, Vladimir M Gorlenko
In this article, we present the description of a novel mesophilic phototrophic Chloroflexi bacterium, 'Candidatus Viridilinea mediisalina' Kir15-3F. We have isolated an anaerobic, highly-enriched culture of this bacterium from the Kiran soda lake (Siberia) and optimized its cultivation. Metagenomic sequencing revealed that 'Ca. Viridilinea mediisalina' Kir15-3F is a bacteriochlorophyll-containing Chloroflexi bacterium in the enrichment culture. Fluorescent in situ hybridisation demonstrated a link between the phenotype described here and the 'Ca...
February 25, 2019: FEMS Microbiology Letters
https://read.qxmd.com/read/30644024/non-conventional-tropical-fruits-characterization-antioxidant-potential-and-carotenoid-bioaccessibility
#14
JOURNAL ARTICLE
Paulo Berni, Stephanie S Campoli, Talita C Negri, Nataly M V de Toledo, Solange G Canniatti-Brazaca
Eleven non-conventional tropical fruits were evaluated regarding their nutritional value, antioxidant potential, carotenoid contents and bioaccessibility. The fruits were chosen due to their spread through the Brazilian territory: araçá-boi, jaracatiá, cambuití, seriguela, capeba, pitangatuba, pitanga, buriti, acerola, dovialis and abricó-da-praia. Results have shown that these fruits are in general, i.e. depending on the fruit, rich sources of dietary fibers and minerals, high in moisture, and low in proteins...
January 15, 2019: Plant Foods for Human Nutrition
https://read.qxmd.com/read/30623873/light-induces-carotenoids-accumulation-in-a-heterotrophic-docosahexaenoic-acid-producing-microalga-crypthecodinium-sp-sun
#15
JOURNAL ARTICLE
Dongzhe Sun, Zhao Zhang, Yue Zhang, Ka-Wing Cheng, Feng Chen
In the present study, the effect of various light conditions on carotenoid accumulation in a novel heterotrophic microalga, Crypthecodinium sp. SUN was investigated. The results showed that C. sp. SUN mainly produced γ-carotene and β-carotene. The total carotenoid content could reach to 12.8 mg g-1 dry weight under high light intensity (100 μmol m-2  s-1 ), which was >100-fold higher than that under dark condition. Besides, along with the light intensity increased, the ROS level in vivo was decreased at 48 h and 72 h...
December 26, 2018: Bioresource Technology
https://read.qxmd.com/read/30309535/peels-of-tucum%C3%A3-astrocaryum-vulgare-and-peach-palm-bactris-gasipaes-are-by-products-classified-as-very-high-carotenoid-sources
#16
JOURNAL ARTICLE
Kevin Albert Noronha Matos, Danielle Praia Lima, Anna Paula Pereira Barbosa, Adriana Zerlotti Mercadante, Renan Campos Chisté
Tucumã (Astrocaryum vulgare) and peach palm (Bactris gasipaes) are Amazonian fruits with high potential to be used as source of carotenoids due to the remarkable yellow-orange colour of their pulp and peel. In this study, for the first time, both the extraction of carotenoids from the peel of tucumã and peach palm fruits and their carotenoid profile were investigated. The carotenoid contents of the peel of both fruits were higher than those found in the pulp. The highest yield of carotenoids from both fruit peels were obtained at the solid-liquid ratio of 1:7 (w/v), 80 min of shaking and by adding 30% of ethyl acetate in acetone, being β-carotene the major carotenoid (7...
January 30, 2019: Food Chemistry
https://read.qxmd.com/read/30178642/metabolic-engineering-of-deinococcus-radiodurans-for-the-production-of-phytoene
#17
JOURNAL ARTICLE
Sun-Wook Jeong, Chang Keun Kang, Yong Jun Choi
A metabolically-engineered Deinococcus radiodurans R1 strain capable of producing phytoene, a colorless C40 carotenoid and a promising antioxidant, has been developed. To make this base strain, first, the crtI gene encoding phytoene desaturase was deleted to block the conversion of phytoene to other carotenoids such as lycopene and γ-carotene. This engineered strain produced 0.413 ± 0.023 mg/l of phytoene from 10 g/l of fructose. Further enhanced production of phytoene up to 4.46 ± 0.19 mg/l was achieved by overexpressing the crtB gene encoding phytoene synthase and the dxs genes encoding 1-deoxy-D -xylulose-5-phosphate synthase gene, and by deleting the crtD gene...
October 28, 2018: Journal of Microbiology and Biotechnology
https://read.qxmd.com/read/29560977/application-of-pulsed-electric-fields-to-tomato-fruit-for-enhancing-the-bioaccessibility-of-carotenoids-in-derived-products
#18
JOURNAL ARTICLE
Sandra González-Casado, Olga Martín-Belloso, Pedro Elez-Martínez, Robert Soliva-Fortuny
The application of pulsed electric fields (PEFs) to whole tomatoes is proposed as a pre-processing treatment to obtain purees with high health-related properties. Tomato fruit was subjected to different electric field strengths (0.4, 1.2 and 2 kV cm-1) and number of pulses (5, 18 and 30 pulses). Tomatoes were stored at 4 °C for 24 h after PEF processing and then ground and mixed with 5% olive oil. The resulting tomato-based product was subjected to in vitro gastrointestinal digestion. PEF treatments significantly increased the amount and bioaccessible fraction of carotenoids in the derived product...
April 25, 2018: Food & Function
https://read.qxmd.com/read/27743323/synechocystis-sp-pcc-6803-crua-sll0147-encodes-lycopene-cyclase-and-requires-bound-chlorophyll-a-for-activity
#19
JOURNAL ARTICLE
Wei Xiong, Gaozhong Shen, Donald A Bryant
The genome of the model cyanobacterium, Synechococcus sp. PCC 7002, encodes two paralogs of CruA-type lycopene cyclases, SynPCC7002_A2153 and SynPCC7002_A0043, which are denoted cruA and cruP, respectively. Unlike the wild-type strain, a cruA deletion mutant is light-sensitive, grows slowly, and accumulates lycopene, γ-carotene, and 1-OH-lycopene; however, this strain still produces β-carotene and other carotenoids derived from it. Expression of cruA from Synechocystis sp. PCC 6803 (cruA 6803) in Escherichia coli strains that synthesize either lycopene or γ-carotene did not lead to the synthesis of either γ-carotene or β-carotene, respectively...
March 2017: Photosynthesis Research
https://read.qxmd.com/read/27263552/carotenoids-of-the-fruiting-gliding-myxobacterium-myxococcus-sp-my-18-isolated-from-lake-sediment-accumulation-of-phytoene-and-keto-myxocoxanthin-glucoside-ester
#20
Shinichi Takaichi, Hideyuki Yazawa, Yoko Yamamoto
The precise chemical structures of two carotenoid glucoside esters, keto-myxocoxanthin glucoside ester isolated from Myxococcus sp. MY-18 and dehydrorhodopin glucoside ester from cells cultured in a nicotinecontaining medium, were determined as 1'-[(6-O-acyl-β-D-glucopyranosyl)oxy]-3',4'-didehydro-l',2'-dihydro-β,ψ-caroten-4-one and 1-[(6-O-acyl-β-D-glucopyranosyl)oxy]-3,4-didehydro-1,2-dihydro-ψ,ψ-carotene, respectively. They had β-D-glucoside, whose C-6 hydroxyl group was esterified. The major fatty acid was 11-methyldodecanoate with minor components of n-dodecanoate, n-tetradecanoate, and 13-methyltetradecanoate...
January 1995: Bioscience, Biotechnology, and Biochemistry
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