The role of triacylglycerol as a reservoir of polyunsaturated fatty acids for the rapid production of chloroplastic lipids in certain microalgae.

Abstract:

:Many microalgae are known to accumulate triacylglycerols (TAGs), especially under nitrate starvation. Generally, these TAGs are predominantly constructed of saturated and monounsaturated fatty acids. In contrast, the TAGs of the red microalga Porphyridium cruentum are rich in arachidonic acid (AA, 20:4 omega6) and eicosapentaenoic acid (EPA, 20:5 omega3). A mutant of this alga, impaired of growth at suboptimal temperatures, was shown to have reduced levels of EPA and of the eukaryotic molecular species of monogalactosyldiacylglycerol (MGDG) and an elevated level of TAG. Labelling experiments have shown that labelling of wild-type TAGs decreased, whereas that of the mutant remained high. Contemporarily, eukaryotic MGDG of the mutant was less labelled. Similarly, TAGs of the green alga Tl2, which can grow at a low temperature, are extremely rich in AA. We have labelled exponentially growing cultures of T12 kept at 25 degrees C with radioactive AA and cultivated the cultures for a further 12 h at 25 degrees C, 12 degrees C or 4 degrees C. At low temperatures, labelled AA was transferred from TAGs to polar lipids. These findings may indicate that polyunsaturated fatty acids that can be incorporated into the membranes, enabling the organism to quickly respond to low-temperature-induced stress.

journal_name

Biochem Soc Trans

authors

Cohen Z,Khozin-Goldberg I,Adlerstein D,Bigogno C

keywords:

subject

Has Abstract

pub_date

2000-12-01 00:00:00

pages

740-3

issue

6

eissn

0300-5127

issn

1470-8752

journal_volume

28

pub_type

杂志文章
  • New functions of the MHC class I-related Fc receptor, FcRn.

    abstract::FcRn was originally identified as the receptor responsible for IgG binding to the intestinal epithelium of neonatal rats and mice. FcRn transports IgG from milk across the intestinal epithelial cells of the suckling animal. Subsequently, FcRn was detected in tissues involved in the transmission of IgG from mother to f...

    journal_title:Biochemical Society transactions

    pub_type: 杂志文章,评审

    doi:10.1042/bst0250481

    authors: Simister NE,Jacobowitz Israel E,Ahouse JC,Story CM

    更新日期:1997-05-01 00:00:00

  • Role of p90(RSK) in regulating the Crabtree effect: implications for cancer.

    abstract::High glucose inhibits mitochondrial respiration, known as the 'Crabtree effect', in cancer cells and possibly other cell types. The upstream pathways regulating this phenomenon are poorly understood. In diabetes, where glucose levels are elevated, the p90(RSK) (p90 ribosomal S6 kinase) has received much attention as a...

    journal_title:Biochemical Society transactions

    pub_type: 杂志文章

    doi:10.1042/BST20120277

    authors: Redman EK,Brookes PS,Karcz MK

    更新日期:2013-02-01 00:00:00

  • Anticipating mechanisms of resistance to PI3K inhibition in breast cancer: a challenge in the era of precision medicine.

    abstract::Frequent subversion of the PI3K (phosphoinositide 3-kinase) pathway during neoplastic transformation contributes to several hallmarks of cancer that result in a competitive advantage for cancer cells. Deregulation of this pathway can be the result of genomic alterations such as PIK3CA mutation, PTEN (phosphatase and t...

    journal_title:Biochemical Society transactions

    pub_type: 杂志文章,评审

    doi:10.1042/BST20140034

    authors: Leroy C,Amante RJ,Bentires-Alj M

    更新日期:2014-08-01 00:00:00

  • Metallothioneins and copper metabolism are candidate therapeutic targets in Huntington's disease.

    abstract::HD (Huntington's disease) is caused by a polyQ (polyglutamine) expansion in the huntingtin protein, which leads to protein misfolding and aggregation of this protein. Abnormal copper accumulation in the HD brain was first reported more than 15 years ago. Recent findings show that copper-regulatory genes are induced du...

    journal_title:Biochemical Society transactions

    pub_type: 杂志文章

    doi:10.1042/BST0380552

    authors: Hands SL,Mason R,Sajjad MU,Giorgini F,Wyttenbach A

    更新日期:2010-04-01 00:00:00

  • Highly glycosylated tumour antigens: interactions with the immune system.

    abstract::A common phenotypic change in cancer is a dramatic transformation of cellular glycosylation. Functional studies of particular tumour-associated oligosaccharides are difficult to interpret conclusively, but carbohydrate-binding proteins are likely to contribute to progression of the tumour. This review discusses the po...

    journal_title:Biochemical Society transactions

    pub_type: 杂志文章,评审

    doi:10.1042/BST0390388

    authors: Saeland E,van Kooyk Y

    更新日期:2011-01-01 00:00:00

  • Receptor tyrosine kinase-GPCR signal complexes.

    abstract::The formation of complexes between growth factor receptors and members of a family of G-protein-coupled receptors whose natural ligands are S1P (sphingosine 1-phosphate) and LPA (lysophosphatidic acid) represents a new signalling entity. This receptor complex allows for integrated signalling in response to growth fact...

    journal_title:Biochemical Society transactions

    pub_type: 杂志文章,评审

    doi:10.1042/bst0311220

    authors: Pyne NJ,Waters C,Moughal NA,Sambi BS,Pyne S

    更新日期:2003-12-01 00:00:00

  • Red light, green light: probing single molecules using alternating-laser excitation.

    abstract::Single-molecule fluorescence methods, particularly single-molecule FRET (fluorescence resonance energy transfer), have provided novel insights into the structure, interactions and dynamics of biological systems. ALEX (alternating-laser excitation) spectroscopy is a new method that extends single-molecule FRET by provi...

    journal_title:Biochemical Society transactions

    pub_type: 杂志文章

    doi:10.1042/BST0360738

    authors: Santoso Y,Hwang LC,Le Reste L,Kapanidis AN

    更新日期:2008-08-01 00:00:00

  • Peptide-based delivery of nucleic acids: design, mechanism of uptake and applications to splice-correcting oligonucleotides.

    abstract::CPPs (cell-penetrating peptides) have given rise to much interest for the delivery of biomolecules such as peptides, proteins or ONs (oligonucleotides). CPPs and their conjugates were initially thought to translocate through the cell membrane by a non-endocytotic mechanism which has recently been re-evaluated. Basic-a...

    journal_title:Biochemical Society transactions

    pub_type: 杂志文章,评审

    doi:10.1042/BST0350053

    authors: Abes S,Moulton H,Turner J,Clair P,Richard JP,Iversen P,Gait MJ,Lebleu B

    更新日期:2007-02-01 00:00:00

  • Biogenesis of the signal recognition particle.

    abstract::Assembly of ribonucleoprotein complexes is a facilitated quality-controlled process that typically includes modification to the RNA component from precursor to mature form. The SRP (signal recognition particle) is a cytosolic ribonucleoprotein that catalyses protein targeting to the endoplasmic reticulum. Assembly of ...

    journal_title:Biochemical Society transactions

    pub_type: 杂志文章,评审

    doi:10.1042/BST0381093

    authors: Leung E,Brown JD

    更新日期:2010-08-01 00:00:00

  • Molecular characterization of substrate-binding sites in the glutamate transporter family.

    abstract::Glutamate transporters are essential for terminating synaptic excitation and for maintaining extracellular glutamate concentrations below neurotoxic levels. These transporters also mediate a thermodynamically uncoupled chloride flux that is activated by two of the molecules that they transport - sodium and glutamate. ...

    journal_title:Biochemical Society transactions

    pub_type: 杂志文章,评审

    doi:10.1042/0300-5127:0290707

    authors: Kanner BI,Kavanaugh MP,Bendahan A

    更新日期:2001-11-01 00:00:00

  • Neuropilin signalling in angiogenesis.

    abstract::VEGFs (vascular endothelial growth factors) are master regulators of vascular development and of blood and lymphatic vessel function during health and disease in adults. This family of five mammalian ligands acts through three RTKs (receptor tyrosine kinases). In addition, co-receptors such as NRPs (neuropilins) assoc...

    journal_title:Biochemical Society transactions

    pub_type: 杂志文章,评审

    doi:10.1042/BST20110689

    authors: Koch S

    更新日期:2012-02-01 00:00:00

  • Plasticity of the alpha4betadelta GABAA receptor.

    abstract::The GABAR [GABA(A) (gamma-aminobutyric acid type A) receptor], which mediates most inhibition in the brain, is regulated homoeostatically to maintain an optimal level of neuronal excitability. In particular, the alpha(4)betadelta subtype of the GABAR plays a pivotal role in this regulation. This receptor, which is exp...

    journal_title:Biochemical Society transactions

    pub_type: 杂志文章

    doi:10.1042/BST0371378

    authors: Shen H,Smith SS

    更新日期:2009-12-01 00:00:00

  • BMP9 is a potential therapeutic agent for use in oral and maxillofacial bone tissue engineering.

    abstract::Oral and maxillofacial surgery is often challenging due to defective bone healing owing to the microbial environment of the oral cavity, the additional involvement of teeth and esthetic concerns. Insufficient bone volume as a consequence of aging and some oral and maxillofacial surgical procedures, such as tumor resec...

    journal_title:Biochemical Society transactions

    pub_type: 杂志文章

    doi:10.1042/BST20200376

    authors: Liu L,Chen Y,Song D,Huang D

    更新日期:2020-06-30 00:00:00

  • Structural predictions of the functions of membrane proteins from HDX-MS.

    abstract::HDX-MS has emerged as a powerful tool to interrogate the structure and dynamics of proteins and their complexes. Recent advances in the methodology and instrumentation have enabled the application of HDX-MS to membrane proteins. Such targets are challenging to investigate with conventional strategies. Developing new t...

    journal_title:Biochemical Society transactions

    pub_type: 杂志文章

    doi:10.1042/BST20190880

    authors: Lau AM,Jia R,Bradshaw RT,Politis A

    更新日期:2020-06-29 00:00:00

  • Self-assembly in the carboxysome: a viral capsid-like protein shell in bacterial cells.

    abstract::Many proteins self-assemble to form large supramolecular complexes. Numerous examples of these structures have been characterized, ranging from spherical viruses to tubular protein assemblies. Some new kinds of supramolecular structures are just coming to light, while it is likely there are others that have not yet be...

    journal_title:Biochemical Society transactions

    pub_type: 杂志文章,评审

    doi:10.1042/BST0350508

    authors: Yeates TO,Tsai Y,Tanaka S,Sawaya MR,Kerfeld CA

    更新日期:2007-06-01 00:00:00

  • Networking in the endoplasmic reticulum.

    abstract::The network of the ER (endoplasmic reticulum) is set up by cytoskeletal control of the movement and remodelling of polygonal rings of tubules, bundles of tubules and cisternal regions. We have developed a new image analysis tool, persistency mapping, to understand the framework upon which the plant ER remodels. With t...

    journal_title:Biochemical Society transactions

    pub_type: 杂志文章,评审

    doi:10.1042/BST0380747

    authors: Griffing LR

    更新日期:2010-06-01 00:00:00

  • The zDHHC family of S-acyltransferases.

    abstract::The discovery of the zDHHC family of S-acyltransferase enzymes has been one of the major breakthroughs in the S-acylation field. Now, more than a decade since their discovery, major questions centre on profiling the substrates of individual zDHHC enzymes (there are 24 ZDHHC genes and several hundred S-acylated protein...

    journal_title:Biochemical Society transactions

    pub_type: 杂志文章,评审

    doi:10.1042/BST20140270

    authors: Lemonidis K,Werno MW,Greaves J,Diez-Ardanuy C,Sanchez-Perez MC,Salaun C,Thomson DM,Chamberlain LH

    更新日期:2015-04-01 00:00:00

  • New insights into the structure and function of the pseudokinase domain in JAK2.

    abstract::JAK (Janus kinase) 2 plays a critical role in signal transduction through several cytokine receptors. JAKs contain a typical tyrosine kinase domain preceded by a pseudokinase [JH2 (JAK homology 2)] domain which has been considered to be catalytically inactive. Identification of activating mutations in the JH2 domain o...

    journal_title:Biochemical Society transactions

    pub_type: 杂志文章,评审

    doi:10.1042/BST20130005

    authors: Silvennoinen O,Ungureanu D,Niranjan Y,Hammaren H,Bandaranayake R,Hubbard SR

    更新日期:2013-08-01 00:00:00

  • Structural basis of natural ligand binding and activation of the Class II G-protein-coupled secretin receptor.

    abstract::The secretin receptor is prototypic of Class II GPCRs (G-protein-coupled receptors), based on its structural and functional characteristics and those of its natural agonist ligand. Secretin represents a linear 27-residue peptide with diffuse pharmacophoric domain. The secretin receptor includes the typical signature s...

    journal_title:Biochemical Society transactions

    pub_type: 杂志文章,评审

    doi:10.1042/BST0350709

    authors: Miller LJ,Dong M,Harikumar KG,Gao F

    更新日期:2007-08-01 00:00:00

  • Infusion of plasma-derived mannan-binding lectin (MBL) into MBL-deficient humans.

    abstract::Our first experience of mannan-binding lectin (MBL)-replacement therapy was with a patient experiencing recurrent erythema multiforme associated with reactivation of herpes simplex virus; his erythematous eruptions could be controlled with infusions of fresh frozen plasma containing MBL, but not with plasma lacking MB...

    journal_title:Biochemical Society transactions

    pub_type: 杂志文章

    doi:10.1042/bst0310768

    authors: Valdimarsson H

    更新日期:2003-08-01 00:00:00

  • A model for the aberrant DNA methylomes in aging cells and cancer cells.

    abstract::DNA methylation at the fifth position of cytosine is a major epigenetic mark conserved in plants and mammals. Genome-wide DNA methylation patterns are dynamically controlled by integrated activities of establishment, maintenance, and removal. In both plants and mammals, a pattern of global DNA hypomethylation coupled ...

    journal_title:Biochemical Society transactions

    pub_type: 杂志文章,评审

    doi:10.1042/BST20180218

    authors: Zhang H,Zhang K,Zhu JK

    更新日期:2019-08-30 00:00:00

  • Apoptosis-like programmed cell death in the grey mould fungus Botrytis cinerea: genes and their role in pathogenicity.

    abstract::A considerable number of fungal homologues of human apoptotic genes have been identified in recent years. Nevertheless, we are far from being able to connect the different pieces and construct a primary structure of the fungal apoptotic regulatory network. To get a better picture of the available fungal components, we...

    journal_title:Biochemical Society transactions

    pub_type: 杂志文章,评审

    doi:10.1042/BST0391493

    authors: Shlezinger N,Doron A,Sharon A

    更新日期:2011-10-01 00:00:00

  • Role of hormone-controlled T-cell cytokines in the maintenance of pregnancy.

    abstract::Human CD4 T helper lymphocytes can be subdivided into at least three distinct functional subsets on the basis of their cytokine secretion profiles. One type of CD4+ lymphocyte, T helper 1 (Th1), produces interferon (IFN)-gamma and tumour necrosis factor beta, a second type (Th2) produces interleukin (IL)-4 and IL-5 an...

    journal_title:Biochemical Society transactions

    pub_type: 杂志文章,评审

    doi:10.1042/bst0280212

    authors: Piccinni MP,Maggi E,Romagnani S

    更新日期:2000-02-01 00:00:00

  • Tryptophan oxygenation: mechanistic considerations.

    abstract::From a protein structural viewpoint, tryptophan is often considered an inert structural amino acid, playing a role as a hydrophobic anchor in membrane proteins or as part of the hydrophobic core of soluble proteins. However, tryptophan is the only polyaromatic amino acid and, from a chemical viewpoint, possesses uniqu...

    journal_title:Biochemical Society transactions

    pub_type: 杂志文章,评审

    doi:10.1042/BST20120073

    authors: Naismith JH

    更新日期:2012-06-01 00:00:00

  • Engineering responsive mechanisms to control the assembly of peptide-based nanostructures.

    abstract::Complex biological machines arise from self-assembly on the basis of structural features programmed into sequence-specific macromolecules (i.e. polypeptides and polynucleotides) at the molecular level. As a consequence of the near-absolute control of macromolecular architecture that results from such sequence specific...

    journal_title:Biochemical Society transactions

    pub_type: 杂志文章,评审

    doi:10.1042/BST0370653

    authors: Dublin S,Zimenkov Y,Conticello VP

    更新日期:2009-08-01 00:00:00

  • Dynamics of autophagosome formation: a pulse and a sequence of waves.

    abstract::Autophagosomes form in eukaryotic cells in response to starvation or to other stress conditions brought about by the unwanted presence in the cytosol of pathogens, damaged organelles or aggregated protein assemblies. The uniqueness of autophagosomes is that they form de novo and that they are the only double-membraned...

    journal_title:Biochemical Society transactions

    pub_type: 杂志文章,评审

    doi:10.1042/BST20140183

    authors: Ktistakis NT,Karanasios E,Manifava M

    更新日期:2014-10-01 00:00:00

  • Definitive endoderm: a key step in coaxing human embryonic stem cells into transplantable beta-cells.

    abstract::Using the Edmonton protocol, a number of patients with Type 1 diabetes mellitus have remained insulin-independent for prolonged periods of time. In spite of this success, transplantation of islets from cadaver donors will remain a therapy for very few patients owing to a lack of donors. Thus, if cell therapy should be...

    journal_title:Biochemical Society transactions

    pub_type: 杂志文章,评审

    doi:10.1042/BST0360272

    authors: Semb H

    更新日期:2008-06-01 00:00:00

  • Dissecting the role of His domain protein tyrosine phosphatase/PTPN23 and ESCRTs in sorting activated epidermal growth factor receptor to the multivesicular body.

    abstract::Sorting of activated epidermal growth factor receptor (EGFR) into intraluminal vesicles (ILVs) within the multivesicular body (MVB) is an essential step during the down-regulation of the receptor. The machinery that drives EGFR sorting attaches to the cytoplasmic face of the endosome and generates vesicles that bud in...

    journal_title:Biochemical Society transactions

    pub_type: 杂志文章,评审

    doi:10.1042/BST20170443

    authors: Tabernero L,Woodman P

    更新日期:2018-10-19 00:00:00

  • Functional and behavioral consequences of Parkinson's disease-associated LRRK2-G2019S mutation.

    abstract::LRRK2 mutation is the most common inherited, autosomal dominant cause of Parkinson's disease (PD) and has also been observed in sporadic cases. Most mutations result in increased LRRK2 kinase activity. LRRK2 is highly expressed in brain regions that receive dense, convergent innervation by dopaminergic and glutamaterg...

    journal_title:Biochemical Society transactions

    pub_type: 杂志文章,评审

    doi:10.1042/BST20180468

    authors: Benson DL,Matikainen-Ankney BA,Hussein A,Huntley GW

    更新日期:2018-12-17 00:00:00

  • Transferrin-mediated iron acquisition by pathogenic Neisseria.

    abstract::The pathogenic Neisseria have a siderophore-independent iron-uptake system reliant on a direct interaction between the bacterial cell and transferrin. In the meningococcus this uptake system is dependent on two surface-exposed transferrin-binding proteins. This short account will review our current knowledge of the tr...

    journal_title:Biochemical Society transactions

    pub_type: 杂志文章,评审

    doi:10.1042/bst0300705

    authors: Evans RW,Oakhill JS

    更新日期:2002-08-01 00:00:00