• Title/Summary/Keyword: Carotenoid biosynthesis gene

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Characterization of Geranylgeranyl Pyrophosphate Synthase from the Marine Bacterium, Paracoccus haeundaensis

  • Seo, Yong-Bae;Lee, Jae-Hyung;Kim, Young-Tae
    • Fisheries and Aquatic Sciences
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    • v.12 no.1
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    • pp.54-59
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    • 2009
  • Carotenoids such as $\beta$-carotene and astaxanthin are used as food colorants, animal feed supplements and for nutritional and cosmetic purposes. In a previous study, an astaxanthin biosynthesis gene cluster was isolated from the marine bacterium, Paracoccus haeundaensis. Geranylgeranyl pyrophosphate (GGPP) synthase (CrtE), encoded by the ortE gene, catalyzes the formation of GGPP from farnesyl pyrophosphate (FPP), which is an essential enzyme for the biosynthesis of carotenoids in early steps. In order to study the biochemical and enzymatic characteristics of this important enzyme, a large quantity of purified GGPP synthase is required. To overproduce GGPP synthase, the crtE gene was subcloned into a pET-44a(+) expression vector and transformed into the Escherichia coli BL21(DE3) codon plus cell. Transformants harboring the crtE gene were cultured and the crtE gene was over-expressed. The expressed protein was purified to homogeneity by affinity chromatography and applied to study its biochemical properties and molecular characteristics.

Enhanced Production of Astaxanthin by Metabolic Engineered Isoprenoid Pathway in Escherichia coli (대장균에서 이소프레노이드 생합성 경로의 대사공학적 개량에 의한 아스타잔틴의 생산성 향상)

  • Lee, Jae-Hyung;Seo, Yong-Bae;Kim, Young-Tae
    • Journal of Life Science
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    • v.18 no.12
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    • pp.1764-1770
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    • 2008
  • The goal of this study is to increase production of astaxanthin in recombinant Escherichia coli by engineered isoprenoid pathway. We have previously reported structural and functional analysis of the astaxanthin biosynthesis genes from a marine bacterium, Paracoccus haeundaensis. The carotenoid biosynthesis gene cluster involved in astaxanthin production contained six carotenogenic genes (crtW, crtZ, crtY, crtI, crtB, and crtE genes) and recombinant E. coli harboring six carotenogenic genes from P. haeundaensis produced 400 ${\mu}g$/g dry cell weight (DCW) of astaxanthin. In order to increase production of astaxanthin in recombinant E. coli, we have cloned 4-hydroxy-3-methylbut-2-enyl diphosphate reductase (lytB), farnesyl diphosphate (FPP) synthase (ispA), and isopentenyl (IPP) diphossphate isomerase (idi) in the isoprenoid pathway from E. coli and coexpressed these genes in recombinant E. coli harboring the astaxanthin biosynthesis genes. This engineered E. coli strain containing both isoprenoid pathway gene and astaxanthin biosynthesis gene cluster produced 1,200 ${\mu}g$/g DCW of astaxanthin, resulting 3-fold increased production of astaxanthin.

Carotenoids Biosynthesis and Their Metabolic Engineering in Plants (식물에서 Carotenoid 생합성 경로와 대사공학적 응용)

  • Ha, Sun-Hwa;Kim, Jung-Bong;Park, Jong-Sug;Ryu, Tae-Hun;Kim, Kyung-Hwan;Hahn, Bum-Soo;Kim, Jong-Bum;Kim, Youg-Hwan
    • Journal of Plant Biotechnology
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    • v.30 no.1
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    • pp.81-95
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    • 2003
  • Carotenoids are synthesized from the plastidic glyceraldehyde-3-phosphate (GAP)/pyruvate pathway in isoprenoids biosynthetic system of plants. They play a crucial role in light harvesting, work as photoprotective agents in photosynthesis of nature, and are also responsible for the red, orange and yellow colors of fruits and flowers in plants. In addition to biological actions of carotenoids as antioxidants and natural pigments, they are essential components of human diet as a source of vitamin A. It has been also suggested that some kinds of carotenoids might provide protection against cancer and heart disease as human medicines. In this article, we review the commercial applications on the basis of biological functions of carotenoids, summarize the studies of genes involved in the carotenoid biosynthetic pathway, and introduce recent results achieved in metabolic engineering of carotenoids. This effort for understanding the carotenoids metabolism will make us to increase the total carotenoid contents of crop plants, direct the carotenoid biosynthetic machinery towards other useful carotenoids, and produce a new array of carotenoids by further metabolizing the new precursors that are created when one or two key enzymes in carotenoid biosynthetic pathway are exchanged through gene manipulation in the near future.

Astaxanthin Biosynthesis in Transgenic Arabidopsis by Using Chyb Gene Encoding β-Carotene Hydroxylase (β-Carotene Hydroxylase 관련 Chyb 유전자를 이용한 형질전환 Arabidopsis에서 Astaxanthin의 생합성)

  • Lee, Ho-Jae;Kang, Kwon-Kyoo
    • Journal of Plant Biotechnology
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    • v.31 no.3
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    • pp.231-237
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    • 2004
  • Oxycarotenoids are oxygenated carotenoids that perform critical roles in plants. $\beta$-Carotene hydroxylase adds hydroxyl groups to the $\beta$-rings of carotenes and has been cloned from several bacteria and plants including Arabidopsis. This study was carried out to investigate the effect of $\beta$-carotene hydroxylase gene (Chyb) on the oxycarotenoids biosynthesis in the transgenic Arabidopsis. Construct of pGCHYB containing Chyb was established onto Gateway vector system (pENTR3C gateway vector and pH2GW7 destination vector). Arabidopsis thaliana (cv. Columbia) was transformed with Agrobacterium tumerfacience GV3101 harboring pGCHYB construct driven by 35S promoter and hygromycin resistant gene. Seven hundred bases paired PCR products, indicating the presence of Chyb gene, were found in the transformants by PCR analysis using Chyb primers. Hygromycin resistance assay showed that transgenes were stably inherited to next generation. The overexpression of the Chyb gene resulted in the decrease carotenoid content. Especially, astaxanthin unusual oxycarotenoid in wild type Arabidopsis was detected in the transgenic plants. This means that decreased carotenoids might be converted into astaxanthin metabolism with the aid of silent gene in the host.

Cloning of Geranylgeranyl Pyrophosphate Synthase (CrtE) Gene from Kocuria gwangalliensis and Its Functional Co-expression in Escherichia coli (코쿠리아 광안리엔시스의 제라닐제라닐 피로인산염 합성 효소의 클로닝과 대장균에서 공발현을 통한 효소 활성에 관한 연구)

  • Seo, Yong-Bae;Kim, Gun-Do;Lee, Jae-Hyung
    • Journal of Life Science
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    • v.22 no.8
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    • pp.1024-1033
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    • 2012
  • A gene encoding a novel geranylgeranyl pyrophosphate (GGPP) synthase from Kocuria gwangalliensis has been cloned and expressed in Escherichia coli. The deduced amino acid sequence showed 59.6% identity with a putative GGPP synthase (CrtE) from K. rhizophila. An expression plasmid containing the crtE gene was constructed, and E. coli cells containing this plasmid produced a recombinant protein with a theoretical molecular mass of 41 kDa, corresponding to the molecular weight of GGPP synthase. Due to the lack of crtE, crtB, and crtI in E. coli, the biosynthesis of lycopene was only obtained when the plasmid pCcrtE was co-transformed into E. coli expressing the pRScrtBI-carrying carotenoid biosynthesis crtB and crtI genes, which were sub-cloned from Paracoccus haeundaensis. The biochemical studies on the expressed proteins were performed via HPLC. The results obtained from this study will provide a wider base of knowledge regarding the primary structure of CrtE cloned from K. gwangalliensis at the molecular level.

Enhanced Production of Astaxanthin by Archaea Chaperonin in Escherichia coli (대장균에서 고세균 샤페론을 이용한 아스타잔틴 생산능 향상을 위한 연구)

  • Seo, Yong Bae;Lee, Jong Kyu;Jeong, Tae Hyug;Nam, Soo-Wan;Kim, Gun-Do
    • Journal of Life Science
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    • v.25 no.12
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    • pp.1339-1346
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    • 2015
  • The aim of this study is to increase production of carotenoids in recombinant Escherichia coli by Archaea chaperonin. The carotenoids are a widely distributed class of structurally and functionally diverse yellow, orange, and red natural pigments. These pigments are synthesized in bacteria, algae, fungi, and plants, and have been widely used as a feed supplement from poultry rearing to aquaculture. Carotenoids also exhibit diverse biological properties, such as strong antioxidant and antitumor activities, and enhancement of immune responses. In the microbial world, carotenoids are present in both anoxygenic and oxygenic photosynthetic bacteria and algae and in many fungi. We have previously reported cloning and functional analysis of the carotenoid biosynthesis genes from Paracoccus haeundaensis. The carotenogenic gene cluster involved in astaxanthin production contained seven carotenogenic genes (crtE, crtB, crtI, crtY, crtZ, crtW and crtX genes) and recombinant Escherichia coli harboring seven carotenogenic genes from Paracoccus haeundaensis produced 400 μg/g dry cell weight (DCW) of astaxanthin. In order to increase production of astaxanthin, we have co-expressed chaperone genes (ApCpnA and ApCpnB) in recombinant Escherichia coli harboring the astaxanthin biosynthesis genes. This engineered Escherichia coli strain containing both chaperone gene and astaxanthin biosynthesis gene cluster produced 890 μg/g DCW of astaxanthin, resulting 2-fold increased production of astaxanthin.

Enhanced Antioxident Effect by over Expression of Tomato β-carotene Hydroxylase Gene (ChyB) Using Agrobacterium-infiltration in Tobacco Plant (Agro-infiltration을 이용한 토마토 β-carotene hydroxylase 유전자(ChyB) 과발현 및 담배식물체의 항산화 효과 증진)

  • Choi, Yoon-Jeong;Yoon, Kyung-Young;Yun, Hae-Keun;Suh, Sang-Gon;Moon, Yong-Sun
    • Horticultural Science & Technology
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    • v.29 no.3
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    • pp.267-272
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    • 2011
  • Several reports indicated that astaxanthin and zeaxanthin have more active anticancer activity than pro-vitamin A carotenes. ${\beta}$-carotene hydroxylase is a key enzyme to synthesize zeaxanthin and astaxanthin in carotenoids biosynthesis pathway. We isolated the ChyB gene encoding ${\beta}$-carotene hydroxylase from tomato leaves. The ChyB gene (1.5Kbp) fragment was cloned into the binary vector and designated to pIG121-ChyB-tom. Agrobacterium-mediated infiltration was used for transient assay in Nicotiana benthamiana. Leaf samples were collected 0, 1, 2, 3 days after infiltration (DAI). RT-PCR result showed that the expression of ${\beta}$-carotene hydroxylase transcripts was not detected in control (0DAI), but its expression was detected after 1 DPI and increased later on. When the activity of ${\beta}$-carotene hydroxylase was measured, the 1,1-diphenyl-pricryl hydrazyl (DPPH) radical scavenging activity (27%) at 2 DAI was significantly higher than that (21%) at 0 DAI. These results indicated that anti-oxidant activity dramatically increased at 2 DAI in tobacco leaves was due to over expression of tomato ${\beta}$-carotene hydroxylase. These results can be the foundation to develop tomato cultivars with high oxy-carotenoids content using the ChyB gene transformation.

Molecular Cloning and Co-Expression of Phytoene Synthase Gene from Kocuria gwangalliensis in Escherichia coli

  • Seo, Yong Bae;Choi, Seong-Seok;Lee, Jong Kyu;Kim, Nan-Hee;Choi, Mi Jin;Kim, Jong-Myoung;Jeong, Tae Hyug;Nam, Soo-Wan;Lim, Han Kyu;Kim, Gun-Do
    • Journal of Microbiology and Biotechnology
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    • v.25 no.11
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    • pp.1801-1809
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    • 2015
  • A phytoene synthase gene, crtB, was isolated from Kocuria gwangalliensis. The crtB with 1,092 bp full-length has a coding sequence of 948 bp and encodes a 316-amino-acids protein. The deduced amino acid sequence showed a 70.9% identity with a putative phytoene synthase from K. rhizophila. An expression plasmid, pCcrtB, containing the crtB gene was constructed, and E. coli cells containing this plasmid produced the recombinant protein of approximately 34kDa , corresponding to the molecular mass of phytoene synthase. Biosynthesis of lycopene was confirmed when the plasmid pCcrtB was co-transformed into E. coli containing pRScrtEI carrying the crtE and crtI genes encoding lycopene biosynthetic pathway enzymes. The results obtained from this study will provide a base of knowledge about the phytoene synthase of K. gwangalliensis and can be applied to the production of carotenoids in a non-carotenoidproducing host.

Characterization of Phenotypic Traits and Application of Fruit Flesh Color Marker in Melon (Cucumis melo L.) Accessions (멜론 유전자원의 생육 평가와 과육색 유전형 분석)

  • Bae, Ik Hyun;Kang, Han Sol;Jeong, Woo Jin;Ryu, Jae Hwang;Lee, Oh Hum;Chung, Hee
    • Korean Journal of Plant Resources
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    • v.34 no.5
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    • pp.478-490
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    • 2021
  • We aimed to generate basic breeding data for melon (Cucumis melo L.). A total of 219 melon accessions conserved at the National Agrobiodiversity Center (NAC) in Rural Development Administration (RDA) were used in this study, of which 72 (33%) were collected from India. The majority of accessions showed orange (42%) and white (36%) flesh color. In addition to phenotypic evaluations, the accessions were genotyped using a molecular marker for the carotenoid biosynthesis gene CmOr. DNA fragments of the expected size were amplified in 205 out of 219 accessions. Digestion of the PCR products with HinfI restriction endonuclease showed 100% concordance between phenotype and genotype in green-fleshed accessions, but 98%, 97%, and 80% concordance in orange-, white-, and creamy-fleshed accessions, respectively. Sequence analysis revealed single nucleotide changes in the three positions of SNP1, SNP2 and SNP1int in the CmOr gene among accessions. These newly found alleles suggest that there are multiple mechanisms in determining fruit flesh color in melon. Also, the phenotype data of diverse accessions obtained in this study will be a valuable source for melon breeding.

Transformation of the Diatom Phaeodactylum tricornutum with its Endogenous (E)-4-Hydroxy-3-methylbut-2-enyl Diphosphate Reductase Gene (Phaeodactylum tricornutum의 (E)-4-Hydroxy-3-methylbut-2-enyl Diphosphate Reductase 유전자의 형질전환)

  • Shin, Bok-Kyu;Jung, Yu-Jin;Kim, Sang-Min;Pan, Cheol-Ho
    • Journal of Applied Biological Chemistry
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    • v.58 no.3
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    • pp.273-279
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    • 2015
  • Phaeodactylum tricornutum is a model diatom that its genomic information and biological tools are well established. In this study, a gene encoding (E)-4-hydroxy-3-methylbut-2-enyl diphosphate reductase (PtHDR), a terminal enzyme of the methylerythritol phosphate pathway regulating chlorophyll and carotenoid biosynthesis, was isolated from P. tricornutum. The isolated gene was cloned into pPha-T1 vector containing fcpA promoter to prepare pPha-T1-HDR plasmid. As a positive control, pPha-T1-eGFP plasmid was constructed with egfp gene. Stable nuclear transformation was carried out with these plasmids by particle bombardment method and zeocin resistant colonies of P. tricornutum were selected on f/2 agar plate. In result, transformation efficiency was evaluated according to the amount of plasmid DNA coated with gold particles. Integration of introduced plasmids was confirmed with genomic DNA of each transformant by polymerase chain reaction. The eGFP fluorescence was visible in the cytoplasm, indicating that eGFP was successively expressed in P. tricornutum system. The transcript level of exogenous Pthdr gene was evaluated with the obtained transformants. The results presented here demonstrated that introduction of Pthdr gene into P. tricornutum chromosome succeeded and expression of PtHDR was enhanced under the fcpA promoter.