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Ting-Ying Wu, Wilhelm Gruissem, Navreet K Bhullar
Rice, a staple food for more than half of the world population, is an important target for iron and zinc biofortification. Current strategies mainly focus on the expression of genes for efficient uptake, long-distance transport and storage. Targeting intracellular iron mobilization to increase grain iron levels has not been reported. Vacuole is an important cell compartment for iron storage and the NATURAL RESISTANCE ASSOCIATED MACROPHAGE PROTEIN (NRAMP) family of transporters export iron from vacuoles to cytosol when needed...
May 7, 2018: Plant Biotechnology Journal
Thierry L Delatte, Giulia Scaiola, Jamil Molenaar, Katyuce de Sousa Farias, Leticia Alves Gomes Albertti, Jacqueline Busscher, Francel Verstappen, Carlos Carollo, Harro Bouwmeester, Jules Beekwilder
Plants store volatile compounds in specialized organs. The properties of these storage organs prevent precarious evaporation and protect neighbouring tissues from cytotoxicity. Metabolic engineering of plants is often done in tissues such as leaf mesophyll cells, which are abundant and easily accessible by engineering tools. However, these tissues are not suitable for the storage of volatile and hydrophobic compound such as sesquiterpenes and engineered volatiles are often lost into the headspace. In the present study we show that the seeds of Arabidopsis thaliana, which naturally contain lipid bodies, accumulate sesquiterpenes upon engineered expression...
April 23, 2018: Plant Biotechnology Journal
Guiying Tang, Pingli Xu, Wenhua Ma, Fang Wang, Zhanji Liu, Shubo Wan, Lei Shan
Peanut ( Arachis hypogaea L.) is one of the major oil crops and is the fifth largest source of plant oils in the world. Numerous genes participate in regulating the biosynthesis and accumulation of the storage lipids in seeds or other reservoir organs, among which several transcription factors, such as LEAFY COTYLEDON1 ( AtLEC1 ), LEC2 , and WRINKLED1 ( WRI1 ), involved in embryo development also control the lipid reservoir in seeds. In this study, the AtLEC1 gene was transferred into the peanut genome and expressed in a seed-specific manner driven by the NapinA full-length promoter or its truncated 230-bp promoter...
2018: Frontiers in Plant Science
Hyeon-Yeol Cho, Taek Lee, Jinho Yoon, Zhenlin Han, Hudifah Rabie, Ki-Bum Lee, Wei Wen Su, Jeong-Woo Choi
In the present study, we fabricated magnetic oleosomes functionalized with recombinant proteins as a new carrier for oil-based lipophilic drugs for cancer treatment. The bioengineered oleosome is composed of neutral lipids surrounded by a phospholipid monolayer with embedded oleosin fusion proteins. The oleosin was genetically fused to a nanobody of a green fluorescent protein (GFP). A recombinant protein consisting of immunoglobulin-binding protein LG fused to GFP was used to couple the oleosome to an antibody for targeted delivery to breast cancer cells...
March 21, 2018: ACS Applied Materials & Interfaces
E Scala, D Villalta, G Meneguzzi, M Giani, R Asero
The families of seed storage proteins, together with profilins, oil-bodies-associated oleosins, and pathogenesis-related (PR) proteins like PR-10 (Bet v 1-like), PR-12 (defensins) and PR-14 (non-specific lipid transfer protein), are the main causes of IgE sensitization to tree nuts, legumes and seeds. All these allergens, with the exclusion of profilins and of PR-10, are heat-stable and possibly responsible for fatal or almost fatal adverse reactions to such foods. In this short review, we will discuss the relationship and amino acid identities among some of the seed storage homologue molecules identified to date from tree nuts, seeds and legumes...
February 1, 2018: European Annals of Allergy and Clinical Immunology
Naichong Chen, Vijaykumar Veerappan, Haggag Abdelmageed, Miyoung Kang, Randy D Allen
Gene expression during seed development in Arabidopsis thaliana is controlled by transcription factors including LEAFY COTYLEDON1 (LEC1) and LEC2, ABA INSENSITIVE3 (ABI3), FUSCA3 (FUS3), known as LAFL proteins, and AGAMOUS-LIKE15 (AGL15). The transition from seed maturation to germination and seedling growth requires the transcriptional silencing of these seed maturation-specific factors leading to downregulation of structural genes including those that encode seed storage proteins, oleosins, and dehydrins...
March 2018: Plant Cell
Abdulsamie Hanano, Mari Alkara, Ibrahem Almousally, Mouhnad Shaban, Farzana Rahman, Mehedi Hassan, Denis J Murphy
Aflatoxins (AF) are highly detrimental to human and animal health. We recently demonstrated that the Aspergillus flavus caleosin, AfPXG, had peroxygenase activity and mediated fungal development and AF accumulation. We now report the characterization of an AfPXG -deficient line using reference strain NRRL3357. The resulting fungal phenotype included a severe decrease in mycelium growth, failure to sporulate, and reduced AF production. Increasing cellular oxidative status by administration of hydrogen peroxide and cumene hydroperoxide did not restore the AfPXG -deficient phenotype, which suggests that AfPXG -deficiency is not directly related to oxidative stress...
2018: Frontiers in Microbiology
Qing-Yu Zhang, Rui Yu, Li-Hang Xie, Md Mahbubur Rahman, Aruna Kilaru, Li-Xin Niu, Yan-Long Zhang
The increasing demand for healthy edible oil has generated the need to identify promising oil crops. Tree peony ( Paeonia section Moutan DC.) is a woody oil crop with α-linolenic acid (ALA) contributing for 45% of the total fatty acid (FA) content in seeds. Molecular and genetic differences that contribute to varied FA content and composition among the wild peony species are, however, poorly understood. Analyses of FA content and composition during seed development in three tree peony species ( Paeonia rockii , P...
2018: Frontiers in Plant Science
Farah Zaaboul, Husnain Raza, Cao Chen, Yuanfa Liu
A microscopic image of a section of a peanut seed shows that oil bodies (OBs) are a small droplet of oil that is dispersed throughout the whole seed. The protein profile of peanut's OBs recovered using the aqueous extraction method at different pH was found to have 2 oleosin isoforms of 14 and 16 kDa. Moreover, OBs essential amino acids are 1.52 higher than those in the PPI. Oleic acid and linoleic acid are the major fatty acids in both cold press peanut oil and OBs regardless of pH. Tocopherol content went from 270...
January 2018: Journal of Food Science
Wenqing Li, Jing Yang, Jingbo Cai, Hongyu Wang, Haishan Tian, Jian Huang, Weidong Qiang, Linbo Zhang, Haiyan Li, Xiaokun Li, Chao Jiang
Recombinant human fibroblast growth factor 10 (rhFGF-10) is frequently used to treat patients with skin injuries. It can also promote hair growth. However, the effective application of rhFGF-10 is limited because of its poor stability and transdermal absorption. In this study, polymerase chain reaction (PCR) and Southern blotting were used to identify transgenic safflowers carrying a gene encoding an oleosin-rhFGF-10 fusion protein. The size and structural integrity of oleosin-rhFGF-10 in oil bodies extracted from transgenic safflower seeds was characterized by polyacrylamide gel electrophoresis and western blotting...
October 18, 2017: International Journal of Molecular Sciences
Ming-Mei Liu, Bin Qi, Zheng-Xu Liu, Jin-Shun Zhan, Kang Zhan, Guo-Qi Zhao
The aim of this study was to optimize the conditions for the extraction of low-abundance proteins (LAPs) and the removal of abundant proteins (APs; β-conglycinin and glycinin) from soybean meal. Single factor and orthogonal experiments were designed to determine the effects of four factors (isopropanol concentration, total extraction time, ultrasonic power, and ultrasonic time) on protein concentration in isopropanol extracts. Proteins in the isopropanol supernatant and the cold acetone precipitate of isopropanol were identified by sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE) and matrix-assisted laser desorption/ionization-time of flight mass spectrometry (MALDI-TOF-MS)...
2017: Journal of Zhejiang University. Science. B
Sehrish Manan, Muhammad Z Ahmad, Gaoyang Zhang, Beibei Chen, Basir U Haq, Jihong Yang, Jian Zhao
Soybean is an important oilseed crop and major dietary protein resource, yet the molecular processes and regulatory mechanisms involved in biosynthesis of seed storage substances are not fully understood. The B3 domain transcription factor (TF) LEC2 essentially regulates embryo development and seed maturation in other plants, but is not functionally characterized in soybean. Here, we characterize the function of a soybean LEC2 homolog, GmLEC2a, in regulating carbohydrate catabolism, triacylglycerol (TAG) biosynthesis, and seed development...
2017: Frontiers in Plant Science
Jing Yang, Weidong Qiang, Suping Ren, Shanyong Yi, Jian Li, Lili Guan, Linna Du, Yongxin Guo, Huilong Hu, Haiyan Li, Xiaokun Li
Basic fibroblast growth factor (bFGF) is a member of the fibroblast growth factors family. It is a highly specific mitogenic factor for many cell types, as though it be involved in wound repair, angiogenesis, nerve nutrition and embryonic development etc. Oil bodies have been applied for medicine, foodstuff and industry field. The heterogonous proteins expressed in oil bodies have distinct advantages, such as less purification steps and low costs. In this study, bFGF was expressed in A. thaliana seeds using oleosin fusion technology...
January 10, 2018: Gene
Yeming Chen, Yajing Chen, Luping Zhao, Xiangzhen Kong, Zhaoqi Yang, Yufei Hua
Peanut seeds are rich in oil, which exists as oil bodies (OBs). By extraction, peanut crude OBs are obtained and can be used as a food ingredient. In a previous study, it was found that the crude OBs contained an unknown protease, which hydrolyzed the oleosins. This would disrupt the integrity of OBs, and therefore, affect their physical and oxidative stability. In this study, the protein composition of crude OBs and some properties of the unknown protease were examined. The results showed that the protease was a two-chain (32 and 9kDa) aspartic protease, which showed high affinity for OBs...
February 15, 2018: Food Chemistry
Pascale Jolivet, Laure Aymé, Alexandre Giuliani, Frank Wien, Thierry Chardot, Yann Gohon
Lipid droplets are the major stock of lipids in oleaginous plant seeds. Despite their economic importance for oil production and biotechnological issues (biofuels, lubricants and plasticizers), numerous questions about their formation, structure and regulation are still unresolved. To determine water accessible domains of protein coating at lipid droplets surface, a structural proteomic approach has been performed. This technique relies on the millisecond timescale production of hydroxyl radicals by the radiolysis of water using Synchrotron X-ray white beam...
October 3, 2017: Journal of Proteomics
Buntora Pasaribu, Miki M C Wang, Pei-Luen Jiang
OBJECTIVE: To investigate the oil body protein and function in seeds of mature seagrass, Thalassia hemprichii. RESULTS: Seeds of mature seagrass T. hemprichii when stained with a fluorescent probe BODIPY showed the presence of oil bodies in intracellular cells. Triacylglycerol was the major lipid class in the seeds. Protein extracted from seagrass seeds was subjected to immunological cross-recognition with land plant seed oil body proteins, such as oleosin and caleosin, resulting in no cross-reactivity...
November 2017: Biotechnology Letters
Uta Jappe, Christian Schwager
PURPOSE OF REVIEW: The purpose of this review is to provide available data on a new class of allergens, the oleosins, and their diagnostic value. There is evidence that allergen extracts used for in vivo as well as in vitro diagnostic tests do not contain oleosins because these proteins are lipophilic and nearly insoluble in saline or aqueous solutions. So far, only oleosins of peanut, sesame and hazelnut have been registered as allergens. Reports on IgE-binding tests performed with oleosins of different species with sera from allergic patients show that IgE specific for oleosins are associated with severe allergic reactions which is why they should be part of the diagnostic tests in the future...
August 9, 2017: Current Allergy and Asthma Reports
Tzyy-Rong Jinn, Sheng-Kuo Hsieh, Yu-Jen Yu, Nou-Ying Tang, Jhao-Ren Lin
Here, we successfully use the oleosin-based fusion expression strategy coupled with the artificial oil body (AOB)-cyanogen bromide (CNBr) platform to produce bioactive MPB peptide which, in a manner identical to that of its native counterpart. In this study, the MPB peptide was interlinked with recombinant oleosin (rOle(127M→L)) by a methionine residue, a CNBr cleavage site. The recombinant rOle(127M→L)-MPB fusion gene was cloned into the pET30a(+) vector and was expressed in E. coli (DE3) after IPTG induction under optimized conditions...
July 24, 2017: Protein and Peptide Letters
Nodumo Nokulunga Zulu, Jennifer Popko, Krzysztof Zienkiewicz, Pablo Tarazona, Cornelia Herrfurth, Ivo Feussner
BACKGROUND: Microalgae are promising alternate and renewable sources for producing valuable products such as biofuel and essential fatty acids. Although this is the case, there are still challenges impeding on the effective commercial production of microalgal products. For instance, their product yield is still too low. Therefore, this study was oriented towards enhancing triacylglycerol (TAG) accumulation in the diatom Phaeodactylum tricornutum (strain Pt4). To achieve this, a type 2 acyl-CoA:diacylglycerol acyltransferase from yeast (ScDGA1) and the lipid droplet (LD) stabilizing oleosin protein 3 from Arabidopsis thaliana (AtOLEO3) were expressed in Pt4...
2017: Biotechnology for Biofuels
Luping Zhao, Xiangzhen Kong, Caimeng Zhang, Yufei Hua, Yeming Chen
P34 probable thiol protease (P34) and Gly m Bd 30K (30K) show high relationship with the protease of 24 kDa oleosin of soybean oil bodies. In this study, 9 day germinated soybean was used to separate bioprocessed P34 (P32) from bioprocessed 30K (28K). Interestingly, P32 existed as dimer, whereas 28K existed as monomer; a P32-rich sample had proteolytic activity and high cleavage site specificity (Lys-Thr of 24 kDa oleosin), whereas a 28K-rich sample showed low proteolytic activity; the P32-rich sample contained one thiol protease...
July 19, 2017: Journal of Agricultural and Food Chemistry
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