LIVIVO - The Search Portal for Life Sciences

zur deutschen Oberfläche wechseln
Advanced search

Search results

Result 1 - 10 of total 91

Search options

  1. Article ; Online: Updates on ion and water transport by the Malpighian tubule.

    Dow, Julian A T / Krause, Sue Ann / Herzyk, Pawel

    Current opinion in insect science

    2021  Volume 47, Page(s) 31–37

    Abstract: The Malpighian (renal) tubule is capable of transporting fluid at remarkable rates. This review will focus on recent insights into the mechanisms by which these high rates are achieved and controlled, with particular reference to the tubules of ... ...

    Abstract The Malpighian (renal) tubule is capable of transporting fluid at remarkable rates. This review will focus on recent insights into the mechanisms by which these high rates are achieved and controlled, with particular reference to the tubules of Drosophila melanogaster, in which the combination of physiology and genetics has led to particularly rapid progress. Like many vertebrate epithelia, the Drosophila tubule has specialized cell types, with active cation transport confined to a large, metabolically active principal cell; whereas the smaller intercalated stellate cell controls chloride and water shunts to achieve net fluid secretion. Recently, the genes underlying many of these processes have been identified, functionally validated and localized within the tubule. The imminent arrival of new types of post-genomic data (notably single cell sequencing) will herald an exciting era of new discovery.
    MeSH term(s) Animals ; Drosophila Proteins/metabolism ; Drosophila melanogaster/genetics ; Drosophila melanogaster/metabolism ; Ion Transport ; Malpighian Tubules ; Water/metabolism
    Chemical Substances Drosophila Proteins ; Water (059QF0KO0R)
    Language English
    Publishing date 2021-03-08
    Publishing country Netherlands
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Review
    ZDB-ID 2772833-X
    ISSN 2214-5753 ; 2214-5745
    ISSN (online) 2214-5753
    ISSN 2214-5745
    DOI 10.1016/j.cois.2021.02.018
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  2. Article ; Online: Histone Deacetylase Complex 1 and histone 1 epigenetically moderate stress responsiveness of Arabidopsis thaliana seedlings

    Perrella, Giorgio / Fasano, Carlo / Donald, Naomi A. / Daddiego, Loretta / Fang, Weiwei / Martignago, Damiano / Carr, Craig / Conti, Lucio / Herzyk, Pawel / Amtmann, Anna

    New Phytologist. 2024 Jan., v. 241, no. 1 p.166-179

    2024  

    Abstract: Early responses of plants to environmental stress factors prevent damage but can delay growth and development in fluctuating conditions. Optimising these trade‐offs requires tunability of plant responsiveness to environmental signals. We have previously ... ...

    Abstract Early responses of plants to environmental stress factors prevent damage but can delay growth and development in fluctuating conditions. Optimising these trade‐offs requires tunability of plant responsiveness to environmental signals. We have previously reported that Histone Deacetylase Complex 1 (HDC1), which interacts with multiple proteins in histone deacetylation complexes, regulates the stress responsiveness of Arabidopsis seedlings, but the underlying mechanism remained elusive. Here, we show that HDC1 attenuates transcriptome re‐programming in salt‐treated seedlings, and we identify two genes (LEA and MAF5) that inhibit seedling establishment under salt stress downstream of HDC1. HDC1 attenuates their transcriptional induction by salt via a dual mechanism involving H3K9/14 deacetylation and H3K27 trimethylation. The latter, but not the former, was also abolished in a triple knockout mutant of the linker histone H1, which partially mimics the hypersensitivity of the hdc1‐1 mutant to salt stress. Although stress‐induced H3K27me3 accumulation required both H1 and HDC1, it was not fully recovered by complementing hdc1‐1 with a truncated, H1‐binding competent HDC1 suggesting other players or independent inputs. The combined findings reveal a dual brake function of HDC1 via regulating both active and repressive epigenetic marks on stress‐inducible genes. This natural ‘anti‐panic’ device offers a molecular leaver to tune stress responsiveness in plants.
    Keywords Arabidopsis thaliana ; epigenetics ; growth and development ; histone deacetylase ; histones ; hypersensitivity ; mutants ; plant establishment ; salt stress ; transcription (genetics) ; transcriptome
    Language English
    Dates of publication 2024-01
    Size p. 166-179.
    Publishing place John Wiley & Sons, Ltd
    Document type Article ; Online
    Note JOURNAL ARTICLE
    ZDB-ID 208885-x
    ISSN 1469-8137 ; 0028-646X
    ISSN (online) 1469-8137
    ISSN 0028-646X
    DOI 10.1111/nph.19165
    Database NAL-Catalogue (AGRICOLA)

    More links

    Kategorien

  3. Article: Environmental Regulation of PndbA600, an Auto-Inducible Promoter for Two-Stage Industrial Biotechnology in Cyanobacteria.

    Madsen, Mary Ann / Hamilton, Graham / Herzyk, Pawel / Amtmann, Anna

    Frontiers in bioengineering and biotechnology

    2021  Volume 8, Page(s) 619055

    Abstract: Cyanobacteria are photosynthetic prokaryotes being developed as sustainable platforms that use renewable resources (light, water, and air) for diverse applications in energy, food, environment, and medicine. Despite the attractive promise that ... ...

    Abstract Cyanobacteria are photosynthetic prokaryotes being developed as sustainable platforms that use renewable resources (light, water, and air) for diverse applications in energy, food, environment, and medicine. Despite the attractive promise that cyanobacteria offer to industrial biotechnology, slow growth rates pose a major challenge in processes which typically require large amounts of biomass and are often toxic to the cells. Two-stage cultivation strategies are an attractive solution to prevent any undesired growth inhibition by de-coupling biomass accumulation (stage I) and the industrial process (stage II). In cyanobacteria, two-stage strategies involve costly transfer methods between stages I and II, and little work has been focussed on using the distinct growth and stationary phases of batch cultures to autoregulate stage transition. In the present study, we identified and characterised a growth phase-specific promoter, which can serve as an auto-inducible switch to regulate two-stage bioprocesses in cyanobacteria. First, growth phase-specific genes were identified from a new RNAseq dataset comparing two growth phases and six nutrient conditions in
    Language English
    Publishing date 2021-01-19
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2719493-0
    ISSN 2296-4185
    ISSN 2296-4185
    DOI 10.3389/fbioe.2020.619055
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  4. Article ; Online: Updates on ion and water transport by the Malpighian tubule

    Dow, Julian A T / Krause, Sue Ann / Herzyk, Pawel

    Current Opinion in Insect Science. 2021 Oct., v. 47 p.31-37

    2021  

    Abstract: The Malpighian (renal) tubule is capable of transporting fluid at remarkable rates. This review will focus on recent insights into the mechanisms by which these high rates are achieved and controlled, with particular reference to the tubules of ... ...

    Abstract The Malpighian (renal) tubule is capable of transporting fluid at remarkable rates. This review will focus on recent insights into the mechanisms by which these high rates are achieved and controlled, with particular reference to the tubules of Drosophila melanogaster, in which the combination of physiology and genetics has led to particularly rapid progress. Like many vertebrate epithelia, the Drosophila tubule has specialized cell types, with active cation transport confined to a large, metabolically active principal cell; whereas the smaller intercalated stellate cell controls chloride and water shunts to achieve net fluid secretion. Recently, the genes underlying many of these processes have been identified, functionally validated and localized within the tubule. The imminent arrival of new types of post-genomic data (notably single cell sequencing) will herald an exciting era of new discovery.
    Keywords Drosophila melanogaster ; Malpighian tubules ; cations ; chlorides ; genetics ; insects ; secretion ; vertebrates
    Language English
    Dates of publication 2021-10
    Size p. 31-37.
    Publishing place Elsevier Inc.
    Document type Article ; Online
    Note Use and reproduction
    ZDB-ID 2772833-X
    ISSN 2214-5753 ; 2214-5745
    ISSN (online) 2214-5753
    ISSN 2214-5745
    DOI 10.1016/j.cois.2021.02.018
    Database NAL-Catalogue (AGRICOLA)

    More links

    Kategorien

  5. Article ; Online: SEC31A may be associated with pituitary hormone deficiency and gonadal dysgenesis.

    Tobias, Edward S / Lucas-Herald, Angela K / Sagar, Danielle / Montezano, Augusto C / Rios, Francisco J / De Lucca Camargo, Livia / Hamilton, Graham / Gazdagh, Gabriella / Diver, Louise A / Williams, Nicola / Herzyk, Pawel / Touyz, Rhian M / Greenfield, Andy / McGowan, Ruth / Ahmed, S Faisal

    Endocrine

    2024  

    Abstract: Purpose: Disorders/differences of sex development (DSD) result from variants in many different human genes but, frequently, have no detectable molecular cause.: Methods: Detailed clinical and genetic phenotyping was conducted on a family with three ... ...

    Abstract Purpose: Disorders/differences of sex development (DSD) result from variants in many different human genes but, frequently, have no detectable molecular cause.
    Methods: Detailed clinical and genetic phenotyping was conducted on a family with three children. A Sec31a animal model and functional studies were used to investigate the significance of the findings.
    Results: By trio whole-exome DNA sequencing we detected a heterozygous de novo nonsense SEC31A variant, in three children of healthy non-consanguineous parents. The children had different combinations of disorders that included complete gonadal dysgenesis and multiple pituitary hormone deficiency. SEC31A encodes a component of the COPII coat protein complex, necessary for intracellular anterograde vesicle-mediated transport between the endoplasmic reticulum (ER) and Golgi. CRISPR-Cas9 targeted knockout of the orthologous Sec31a gene region resulted in early embryonic lethality in homozygous mice. mRNA expression of ER-stress genes ATF4 and CHOP was increased in the children, suggesting defective protein transport. The pLI score of the gene, from gnomAD data, is 0.02.
    Conclusions: SEC31A might underlie a previously unrecognised clinical syndrome comprising gonadal dysgenesis, multiple pituitary hormone deficiencies, dysmorphic features and developmental delay. However, a variant that remains undetected, in a different gene, may alternatively be causal in this family.
    Language English
    Publishing date 2024-02-24
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1194484-5
    ISSN 1559-0100 ; 1355-008X ; 0969-711X
    ISSN (online) 1559-0100
    ISSN 1355-008X ; 0969-711X
    DOI 10.1007/s12020-024-03701-x
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  6. Article ; Online: Overexpression of Brassica napus COMT1 in Arabidopsis heightens UV-B-mediated resistance to Plutella xylostella herbivory.

    McInnes, Kirsty J / van der Hooft, Justin J J / Sharma, Ashutosh / Herzyk, Pawel / Hundleby, Penny A C / Schoonbeek, Henk-Jan / Amtmann, Anna / Ridout, Christopher / Jenkins, Gareth I

    Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology

    2023  Volume 22, Issue 10, Page(s) 2341–2356

    Abstract: UV-B radiation regulates numerous morphogenic, biochemical and physiological responses in plants, and can stimulate some responses typically associated with other abiotic and biotic stimuli, including invertebrate herbivory. Removal of UV-B from the ... ...

    Abstract UV-B radiation regulates numerous morphogenic, biochemical and physiological responses in plants, and can stimulate some responses typically associated with other abiotic and biotic stimuli, including invertebrate herbivory. Removal of UV-B from the growing environment of various plant species has been found to increase their susceptibility to consumption by invertebrate pests, however, to date, little research has been conducted to investigate the effects of UV-B on crop susceptibility to field pests. Here, we report findings from a multi-omic and genetic-based study investigating the mechanisms of UV-B-stimulated resistance of the crop, Brassica napus (oilseed rape), to herbivory from an economically important lepidopteran specialist of the Brassicaceae, Plutella xylostella (diamondback moth). The UV-B photoreceptor, UV RESISTANCE LOCUS 8 (UVR8), was not found to mediate resistance to this pest. RNA-Seq and untargeted metabolomics identified components of the sinapate/lignin biosynthetic pathway that were similarly regulated by UV-B and herbivory. Arabidopsis mutants in genes encoding two enzymes in the sinapate/lignin biosynthetic pathway, CAFFEATE O-METHYLTRANSFERASE 1 (COMT1) and ELICITOR-ACTIVATED GENE 3-2 (ELI3-2), retained UV-B-mediated resistance to P. xylostella herbivory. However, the overexpression of B. napus COMT1 in Arabidopsis further reduced plant susceptibility to P. xylostella herbivory in a UV-B-dependent manner. These findings demonstrate that overexpression of a component of the sinapate/lignin biosynthetic pathway in a member of the Brassicaceae can enhance UV-B-stimulated resistance to herbivory from P. xylostella.
    MeSH term(s) Animals ; Arabidopsis/genetics ; Arabidopsis/radiation effects ; Brassica napus/genetics ; Herbivory ; Lignin ; Moths/physiology ; Plants
    Chemical Substances caffeate O-methyltransferase (EC 2.1.1.68) ; Lignin (9005-53-2)
    Language English
    Publishing date 2023-07-28
    Publishing country England
    Document type Journal Article
    ZDB-ID 2072584-X
    ISSN 1474-9092 ; 1474-905X
    ISSN (online) 1474-9092
    ISSN 1474-905X
    DOI 10.1007/s43630-023-00455-9
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  7. Article ; Online: Early-responsive molecular signatures associated with halophytic adaptation in Sesuvium portulacastrum (L.).

    Kulkarni, Jayant / Sahoo, Sripati A / Herzyk, Pawel / Barvkar, Vitthal T / Kumar, Sanjukta A / Ravichandran, Janani / Samal, Areejit / Amtmann, Anna / Borde, Mahesh / Suprasanna, Penna / Srivastava, Ashish K

    Plant, cell & environment

    2023  Volume 47, Issue 3, Page(s) 961–975

    Abstract: Sesuvium portulacastrum (L.) is a halophyte, adapted to grow naturally under saline environments. The ability to use Na and K interchangeably indicated its facultative halophyte nature. No significant growth reduction occurs in seedlings up to 250 mM ... ...

    Abstract Sesuvium portulacastrum (L.) is a halophyte, adapted to grow naturally under saline environments. The ability to use Na and K interchangeably indicated its facultative halophyte nature. No significant growth reduction occurs in seedlings up to 250 mM NaCl, except for curling of the youngest leaf. Within 8 h of salt treatment, seedlings accumulate proline, glycine betaine and other amino acids in both root and shoot. Despite a continued increase of tissue Na content, the number of differentially expressed genes (DEGs) decreases between 8 and 24 h of salt exposure, indicating transcriptional restoration after the initial osmotic challenge. At 8 h, upregulated genes mainly encode transporters and transcription factors, while genes in growth-related pathways such as photosynthesis and ribosome-associated biogenesis are suppressed. Overexpression of SpRAB18 (an ABA-responsive dehydrin), one of the most strongly induced DEGs, in soybean was found to increase biomass in control conditions and the growth benefit was maintained when plants were grown in 100 mM NaCl, indicating conservation of function in halophyte and glycophyte. An open-access transcriptome database "SesuviumKB" (https://cb.imsc.res.in/sesuviumkb/) was developed to involve the scientific community in wide-scale functional studies of S. portulacastrum genes, that could pave the way to engineer salt tolerance in crops.
    MeSH term(s) Salt-Tolerant Plants/genetics ; Salt-Tolerant Plants/metabolism ; Sodium Chloride/pharmacology ; Sodium Chloride/metabolism ; Photosynthesis ; Salt Tolerance/genetics ; Aizoaceae/genetics ; Aizoaceae/metabolism ; Sodium/metabolism
    Chemical Substances Sodium Chloride (451W47IQ8X) ; Sodium (9NEZ333N27)
    Language English
    Publishing date 2023-12-03
    Publishing country United States
    Document type Journal Article
    ZDB-ID 391893-2
    ISSN 1365-3040 ; 0140-7791
    ISSN (online) 1365-3040
    ISSN 0140-7791
    DOI 10.1111/pce.14767
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  8. Article ; Online: Histone Deacetylase Complex 1 and histone 1 epigenetically moderate stress responsiveness of Arabidopsis thaliana seedlings.

    Perrella, Giorgio / Fasano, Carlo / Donald, Naomi A / Daddiego, Loretta / Fang, Weiwei / Martignago, Damiano / Carr, Craig / Conti, Lucio / Herzyk, Pawel / Amtmann, Anna

    The New phytologist

    2023  Volume 241, Issue 1, Page(s) 166–179

    Abstract: Early responses of plants to environmental stress factors prevent damage but can delay growth and development in fluctuating conditions. Optimising these trade-offs requires tunability of plant responsiveness to environmental signals. We have previously ... ...

    Abstract Early responses of plants to environmental stress factors prevent damage but can delay growth and development in fluctuating conditions. Optimising these trade-offs requires tunability of plant responsiveness to environmental signals. We have previously reported that Histone Deacetylase Complex 1 (HDC1), which interacts with multiple proteins in histone deacetylation complexes, regulates the stress responsiveness of Arabidopsis seedlings, but the underlying mechanism remained elusive. Here, we show that HDC1 attenuates transcriptome re-programming in salt-treated seedlings, and we identify two genes (LEA and MAF5) that inhibit seedling establishment under salt stress downstream of HDC1. HDC1 attenuates their transcriptional induction by salt via a dual mechanism involving H3K9/14 deacetylation and H3K27 trimethylation. The latter, but not the former, was also abolished in a triple knockout mutant of the linker histone H1, which partially mimics the hypersensitivity of the hdc1-1 mutant to salt stress. Although stress-induced H3K27me3 accumulation required both H1 and HDC1, it was not fully recovered by complementing hdc1-1 with a truncated, H1-binding competent HDC1 suggesting other players or independent inputs. The combined findings reveal a dual brake function of HDC1 via regulating both active and repressive epigenetic marks on stress-inducible genes. This natural 'anti-panic' device offers a molecular leaver to tune stress responsiveness in plants.
    MeSH term(s) Arabidopsis/metabolism ; Histones/metabolism ; Seedlings ; Arabidopsis Proteins/genetics ; Arabidopsis Proteins/metabolism ; Histone Deacetylases/genetics ; Histone Deacetylases/metabolism ; Gene Expression Regulation, Plant
    Chemical Substances Histones ; Arabidopsis Proteins ; Histone Deacetylases (EC 3.5.1.98)
    Language English
    Publishing date 2023-08-10
    Publishing country England
    Document type Journal Article
    ZDB-ID 208885-x
    ISSN 1469-8137 ; 0028-646X
    ISSN (online) 1469-8137
    ISSN 0028-646X
    DOI 10.1111/nph.19165
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  9. Article ; Online: Regulation of transcription by the Arabidopsis UVR8 photoreceptor involves a specific histone modification.

    Velanis, Christos N / Herzyk, Pawel / Jenkins, Gareth I

    Plant molecular biology

    2016  Volume 92, Issue 4-5, Page(s) 425–443

    Abstract: The photoreceptor UV RESISTANCE LOCUS 8 (UVR8) specifically mediates photomorphogenic responses to UV-B wavelengths. UVR8 acts by regulating transcription of a set of genes, but the underlying mechanisms are unknown. Previous research indicated that UVR8 ...

    Abstract The photoreceptor UV RESISTANCE LOCUS 8 (UVR8) specifically mediates photomorphogenic responses to UV-B wavelengths. UVR8 acts by regulating transcription of a set of genes, but the underlying mechanisms are unknown. Previous research indicated that UVR8 can associate with chromatin, but the specificity and functional significance of this interaction are not clear. Here we show, by chromatin immunoprecipitation, that UV-B exposure of Arabidopsis increases acetylation of lysines K9 and/or K14 of histone H3 at UVR8-regulated gene loci in a UVR8-dependent manner. The transcription factors HY5 and/or HYH, which mediate UVR8-regulated transcription, are also required for this chromatin modification, at least for the ELIP1 gene. Furthermore, sequencing of the immunoprecipitated DNA revealed that all UV-B-induced enrichments in H3K9,14diacetylation across the genome are UVR8-dependent, and approximately 40 % of the enriched loci contain known UVR8-regulated genes. In addition, inhibition of histone acetylation by anacardic acid reduces the UV-B induced, UVR8 mediated expression of ELIP1 and CHS. No evidence was obtained in yeast 2-hybrid assays for a direct interaction between either UVR8 or HY5 and several proteins involved in light-regulated histone modification, nor for the involvement of these proteins in UVR8-mediated responses in plants, although functional redundancy between proteins could influence the results. In summary, this study shows that UVR8 regulates a specific chromatin modification associated with transcriptional regulation of a set of UVR8-target genes.
    MeSH term(s) Arabidopsis/metabolism ; Arabidopsis/radiation effects ; Arabidopsis Proteins/genetics ; Arabidopsis Proteins/metabolism ; Chromatin/metabolism ; Chromatin/radiation effects ; Chromosomal Proteins, Non-Histone/genetics ; Chromosomal Proteins, Non-Histone/metabolism ; Gene Expression Regulation, Plant/genetics ; Gene Expression Regulation, Plant/radiation effects ; Histone Code ; Histones/metabolism ; Ultraviolet Rays
    Chemical Substances Arabidopsis Proteins ; Chromatin ; Chromosomal Proteins, Non-Histone ; Histones ; Uvr8 protein, Arabidopsis
    Language English
    Publishing date 2016-11
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 778032-1
    ISSN 1573-5028 ; 0167-4412
    ISSN (online) 1573-5028
    ISSN 0167-4412
    DOI 10.1007/s11103-016-0522-3
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  10. Article ; Online: M

    Dwomoh, Louis / Rossi, Mario / Scarpa, Miriam / Khajehali, Elham / Molloy, Colin / Herzyk, Pawel / Mistry, Shailesh N / Bottrill, Andrew R / Sexton, Patrick M / Christopoulos, Arthur / Conn, Jeffrey / Lindsley, Craig W / Bradley, Sophie J / Tobin, Andrew B

    Science signaling

    2022  Volume 15, Issue 760, Page(s) eabm3720

    Abstract: Many dementias are propagated through the spread of "prion-like" misfolded proteins. This includes prion diseases themselves (such as Creutzfeldt-Jakob disease) and Alzheimer's disease (AD), for which no treatments are available to slow or stop ... ...

    Abstract Many dementias are propagated through the spread of "prion-like" misfolded proteins. This includes prion diseases themselves (such as Creutzfeldt-Jakob disease) and Alzheimer's disease (AD), for which no treatments are available to slow or stop progression. The M
    MeSH term(s) Humans ; Animals ; Mice ; Prions/genetics ; Neurodegenerative Diseases/genetics ; Pathology, Molecular ; Proteomics ; Prion Diseases/genetics ; Alzheimer Disease/genetics ; Alzheimer Disease/pathology ; Receptor, Muscarinic M1/genetics ; Receptor, Muscarinic M1/metabolism
    Chemical Substances Prions ; Receptor, Muscarinic M1
    Language English
    Publishing date 2022-11-15
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2417226-1
    ISSN 1937-9145 ; 1945-0877
    ISSN (online) 1937-9145
    ISSN 1945-0877
    DOI 10.1126/scisignal.abm3720
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

To top