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arabinogalactan protein plant

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https://www.readbyqxmd.com/read/28267501/evolution-of-plant-cell-wall-arabinogalactan-proteins-from-three-moss-genera-show-structural-differences-compared-to-seed-plants
#1
Desirée Bartels, Alexander Baumann, Malte Maeder, Thomas Geske, Esther Marie Heise, Klaus von Schwartzenberg, Birgit Classen
Arabinogalactan-proteins (AGPs) are important proteoglycans of plant cell walls. They seem to be present in most, if not all seed plants, but their occurrence and structure in bryophytes is widely unknown and actually the focus of AGP research. With regard to evolution of plant cell wall, we isolated AGPs from the three mosses Sphagnum sp., Physcomitrella patens and Polytrichastrum formosum. The moss AGPs show structural characteristics common for AGPs of seed plants, but also unique features, especially 3-O-methyl-rhamnose (trivial name acofriose) as terminal monosaccharide not found in arabinogalactan-proteins of angiosperms and 1,2,3-linked galactose as branching point never found in arabinogalactan-proteins before...
May 1, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28218299/expression-and-distribution-of-extensins-and-agps-in-susceptible-and-resistant-banana-cultivars-in-response-to-wounding-and-fusarium-oxysporum
#2
Yunli Wu, Wei Fan, Xiaoquan Li, Houbin Chen, Tomáš Takáč, Olga Šamajová, Musana Rwalinda Fabrice, Ling Xie, Juan Ma, Jozef Šamaj, Chunxiang Xu
Banana Fusarium wilt caused by Fusarium oxysporum f. sp. cubense (Foc) is soil-borne disease of banana (Musa spp.) causing significant economic losses. Extensins and arabinogalactan proteins (AGPs) are cell wall components important for pathogen defence. Their significance for Foc resistance in banana was not reported so far. In this study, two banana cultivars differing in Foc sensitivity were used to monitor the changes in transcript levels, abundance and distribution of extensins and AGPs after wounding and Foc inoculation...
February 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28184232/bioinformatics-prediction-and-evolution-analysis-of-arabinogalactan-proteins-in-the-plant-kingdom
#3
Yuling Ma, Chenchao Yan, Huimin Li, Wentao Wu, Yaxue Liu, Yuqian Wang, Qin Chen, Haoli Ma
Arabinogalactan proteins (AGPs) are a family of extracellular glycoproteins implicated in plant growth and development. With a rapid growth in the number of genomes sequenced in many plant species, the family members of AGPs can now be predicted to facilitate functional investigation. Building upon previous advances in identifying Arabidopsis AGPs, an integrated strategy of systematical AGP screening for "classical" and "chimeric" family members is proposed in this study. A Python script named Finding-AGP is compiled to find AGP-like sequences and filter AGP candidates under the given thresholds...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28137704/pollen-tube-access-to-the-ovule-is-mediated-by-glycoprotein-secretion-on-the-obturator-of-apple-malus-%C3%A3-domestica-borkh
#4
Juan M Losada, Maria Herrero
BACKGROUND AND AIMS: Within the ovary, the obturator bridges the pathway of the pollen tube from the style to the ovule. Despite its widespread presence among flowering plants, its function has only been studied in a handful of species, and the molecules involved in pollen tube-obturator cross-talk have not been explored hitherto. This work evaluates the involvement of glucans and glycoproteins on pollen tube growth in the obturator of apple flowers (Malus × domestica) METHODS: Pollen tube kinetics were sequentially examined in the pistil and related to changes occurring on the obturator using histochemistry and inmunocytochemistry...
January 29, 2017: Annals of Botany
https://www.readbyqxmd.com/read/28122511/distribution-of-some-pectic-and-arabinogalactan-protein-epitopes-during-solanum-lycopersicum-l-adventitious-root-development
#5
Katarzyna Sala, Katarzyna Malarz, Peter W Barlow, Ewa U Kurczyńska
BACKGROUND: The adventitious roots (AR) of plants share the same function as primary and lateral roots (LR), although their development is mainly an adaptive reaction to stress conditions. Regeneration of grafted plants is often accompanied by AR formation thus making the grafting technique a good model for studying AR initiation and development and their means of emergence. Pectins and arabinogalactan proteins (AGP) are helpful markers of particular cellular events, such as programmed cell death (PCD), elongation, proliferation or other differentiation events that accompany AR development...
January 25, 2017: BMC Plant Biology
https://www.readbyqxmd.com/read/28018417/arabinogalactan-proteins-as-interactors-along-the-crosstalk-between-the-pollen-tube-and-the-female-tissues
#6
REVIEW
Ana M Pereira, Ana L Lopes, Sílvia Coimbra
Arabinogalactan proteins (AGPs) have long been considered to be implicated in several steps of the reproductive process of flowering plants. Pollen tube growth along the pistil tissues requires a multiplicity of signaling pathways to be activated and turned off precisely, at crucial timepoints, to guarantee successful fertilization and seed production. In the recent years, an outstanding effort has been made by the plant reproduction scientific community in order to better understand this process. This resulted in the discovery of a fairly substantial number of new players essential for reproduction, as well as their modes of action and interactions...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27976267/arabinogalactan-proteins-agps-signaling-molecules-of-the-extracellular-matrix-of-plants
#7
E M Heise, B Classen
No abstract text is available yet for this article.
December 2016: Planta Medica
https://www.readbyqxmd.com/read/27893856/spatial-distribution-of-selected-chemical-cell-wall-components-in-the-embryogenic-callus-of-brachypodium-distachyon
#8
Alexander Betekhtin, Magdalena Rojek, Anna Milewska-Hendel, Robert Gawecki, Jagna Karcz, Ewa Kurczynska, Robert Hasterok
Brachypodium distachyon L. Beauv. (Brachypodium) is a species that has become an excellent model system for gaining a better understanding of various areas of grass biology and improving plant breeding. Although there are some studies of an in vitro Brachypodium culture including somatic embryogenesis, detailed knowledge of the composition of the main cell wall components in the embryogenic callus in this species is missing. Therefore, using the immunocytochemical approach, we targeted 17 different antigens of which five were against the arabinogalactan proteins (AGP), three were against extensins, six recognised pectic epitopes and two recognised hemicelluloses...
2016: PloS One
https://www.readbyqxmd.com/read/27888523/the-cotton-%C3%AE-galactosyltransferase-1-galt1-that-galactosylates-arabinogalactan-proteins-participates-in-controlling-fiber-development
#9
Li-Xia Qin, Yun Chen, Wei Zeng, Yang Li, Lu Gao, Deng-Di Li, Antony Bacic, Wen-Liang Xu, Xue-Bao Li
Arabinogalactan proteins (AGPs) are highly glycosylated proteins that play pivotal roles in diverse developmental processes in plants. Type-II AG glycans, mostly O-linked to the hydroxyproline residues of the protein backbone, account for up to 95% w/w of the AGP, but their functions are still largely unclear. Cotton fibers are extremely elongated single-cell trichomes on the seed epidermis; however, little is known of the molecular basis governing the regulation of fiber cell development. Here, we characterized the role of a CAZy glycosyltransferase 31 (GT31) family member, GhGalT1, in cotton fiber development...
March 2017: Plant Journal: for Cell and Molecular Biology
https://www.readbyqxmd.com/read/27884087/a-protease-peptidase-from-culture-medium-of-flammulina-velutipes-that-acts-on-arabinogalactan-protein
#10
Yoshihisa Yoshimi, Yumi Sugawara, Chiaki Hori, Kiyohiko Igarashi, Satoshi Kaneko, Yoichi Tsumuraya, Toshihisa Kotake
Arabinogalactan-proteins (AGPs) are highly diverse plant proteoglycans found on the plant cell surface. AGPs have large arabinogalactan (AG) moieties attached to a core-protein rich in hydroxyproline (Hyp). The AG undergoes hydrolysis by various glycoside hydrolases, most of which have been identified, whereas the core-proteins is presumably degraded by unknown proteases/peptidases secreted from fungi and bacteria in nature. Although several enzymes hydrolyzing other Hyp-rich proteins are known, the enzymes acting on the core-proteins of AGPs remain to be identified...
March 2017: Bioscience, Biotechnology, and Biochemistry
https://www.readbyqxmd.com/read/27878998/the-transition-from-somatic-to-germline-identity-shows-conserved-and-specialized-features-during-angiosperm-evolution
#11
Jorge Lora, María Herrero, Matthew R Tucker, José I Hormaza
How and why specific plant cells adopt germline identity during ovule development has proved challenging to address, and the pathways that are active in the ovules of basal/early-divergent angiosperms possessing a multilayered nucellus are still unclear. Here, we compare megasporogenesis between two early-divergent angiosperms (Annona cherimola and Persea americana) and the evolutionarily derived Arabidopsis thaliana, studying the three-dimensional spatial position of the megaspore mother cell (MMC), the compositional details of the MMC wall and the location of PIN1 expression...
November 23, 2016: New Phytologist
https://www.readbyqxmd.com/read/27837085/kns4-upex1-a-type-ii-arabinogalactan-%C3%AE-1-3-galactosyltransferase-required-for-pollen-exine-development
#12
Toshiya Suzuki, Joan Oñate Narciso, Wei Zeng, Allison van de Meene, Masayuki Yasutomi, Shunsuke Takemura, Edwin R Lampugnani, Monika S Doblin, Antony Bacic, Sumie Ishiguro
Pollen exine is essential for protection from the environment of the male gametes of seed-producing plants, but its assembly and composition remain poorly understood. We previously characterized Arabidopsis (Arabidopsis thaliana) mutants with abnormal pollen exine structure and morphology that we named kaonashi (kns). Here we describe the identification of the causal gene of kns4 that was found to be a member of the CAZy glycosyltransferase 31 gene family, identical to UNEVEN PATTERN OF EXINE1, and the biochemical characterization of the encoded protein...
January 2017: Plant Physiology
https://www.readbyqxmd.com/read/27769192/bioinformatic-identification-and-analysis-of-hydroxyproline-rich-glycoproteins-in-populus-trichocarpa
#13
Allan M Showalter, Brian D Keppler, Xiao Liu, Jens Lichtenberg, Lonnie R Welch
BACKGROUND: Hydroxyproline-rich glycoproteins (HRGPs) constitute a plant cell wall protein superfamily that functions in diverse aspects of growth and development. This superfamily contains three members: the highly glycosylated arabinogalactan-proteins (AGPs), the moderately glycosylated extensins (EXTs), and the lightly glycosylated proline-rich proteins (PRPs). Chimeric and hybrid HRGPs, however, also exist. A bioinformatics approach is employed here to identify and classify AGPs, EXTs, PRPs, chimeric HRGPs, and hybrid HRGPs from the proteins predicted by the completed genome sequence of poplar (Populus trichocarpa)...
October 21, 2016: BMC Plant Biology
https://www.readbyqxmd.com/read/27736003/arabinogalactan-proteins-from-baobab-and-acacia-seeds-influence-innate-immunity-of-human-keratinocytes-in-vitro
#14
Abderrakib Zahid, Julie Despres, Magalie Benard, Eric Nguema-Ona, Jerome Leprince, David Vaudry, Christophe Rihouey, Maité Vicré-Gibouin, Azeddine Driouich, Marie-Laure Follet-Gueye
Plant derived arabinogalactan proteins (AGP) were repeatedly confirmed as immunologically as well as dermatologically active compounds. However little is currently known regarding their potential activity towards skin innate immunity. Here, we extracted and purified AGP from acacia (Acacia senegal) and baobab (Adansonia digitata) seeds to investigate their biological effects on the HaCaT keratinocyte cell line in an in vitro system. While AGP from both sources did not exhibit any cytotoxic effect, AGP from acacia seeds enhanced cell viability Moreover, real-time quantitative reverse transcription-polymerase chain reaction (qRT-PCR) analysis showed that AGP extracted from both species induced a substantial overexpression of hBD-2, TLR-5, and IL1-α genes...
October 13, 2016: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/27632186/dramatic-secretion-of-recombinant-protein-expressed-in-tobacco-cells-with-a-designer-glycopeptide-tag-is-highly-impacted-by-medium-composition
#15
Ningning Zhang, Maureen Dolan, Di Wu, Gregory C Phillips, Jianfeng Xu
Cell growth medium composition has profound impacts on the O -glycosylation of a "designer" arabinogalactan protein-based module; full glycosylation is essential in directing efficient extracellular secretion of the tagged recombinant protein. Expression of recombinant proteins in plant cells as fusion with a de novo designed hydroxyproline (Hyp)-O-glycosylated peptide (HypGP) tag, termed HypGP engineering technology, resulted in dramatically increased secreted protein yields. This is due to the function of the HypGP tag as a molecular carrier in promoting efficient transport of conjoined proteins into culture media...
December 2016: Plant Cell Reports
https://www.readbyqxmd.com/read/27562432/arabinogalactan-protein-motif-containing-receptor-like-kinases-are-likely-to-play-the-negative-feedback-factor-to-maintain-proper-root-hair-length
#16
Hyung-Taeg Cho
Coordination of the events between cytoplasm and cell wall is necessary for the proper cellular activity of plants. Cell wall-associated receptor kinases are likely to play the interface for the extra-to-internal signaling process. Arabidopsis ROOT HAIR SPECIFIC 10 (RHS10), belonging to the proline-rich extensin-like receptor kinase (PERK) family, is a Ser/Thr protein kinase with arabinogalactan protein (AGP) motifs in its extracellular domain (ECD). RHS10 and other angiosperm PERK homologs are inhibitory in root hair tip growth...
September 2016: Plant Signaling & Behavior
https://www.readbyqxmd.com/read/27524986/dissecting-seed-mucilage-adherence-mediated-by-fei2-and-sos5
#17
Jonathan S Griffiths, Marie-Jeanne Crepeau, Marie-Christine Ralet, Georg J Seifert, Helen M North
The plant cell wall is held together by the interactions between four major components: cellulose, pectin, hemicellulose, and proteins. Mucilage is a powerful model system to study the interactions between these components as it is formed of polysaccharides that are deposited in the apoplast of seed coat epidermal cells during seed development. When seeds are hydrated, these polysaccharides expand rapidly out of the apoplastic pocket, and form an adherent halo of mucilage around the seed. In Arabidopsis, mutations in multiple genes have similar loss of mucilage adherence phenotypes including CELLULOSE SYNTHASE 5 (CESA5)/MUCILAGE-MODIFIED 3 (MUM3), MUM5/MUCI21, SALT-OVERLY SENSITIVE 5 (SOS5), and FEI2...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27524487/maternal-enodls-are-required-for-pollen-tube-reception-in-arabidopsis
#18
Yingnan Hou, Xinyang Guo, Philipp Cyprys, Ying Zhang, Andrea Bleckmann, Le Cai, Qingpei Huang, Yu Luo, Hongya Gu, Thomas Dresselhaus, Juan Dong, Li-Jia Qu
During the angiosperm (flowering-plant) life cycle, double fertilization represents the hallmark between diploid and haploid generations [1]. The success of double fertilization largely depends on compatible communication between the male gametophyte (pollen tube) and the maternal tissues of the flower, culminating in precise pollen tube guidance to the female gametophyte (embryo sac) and its rupture to release sperm cells. Several important factors involved in the pollen tube reception have been identified recently [2-6], but the underlying signaling pathways are far from being understood...
September 12, 2016: Current Biology: CB
https://www.readbyqxmd.com/read/27516259/arabinogalactan-proteins-stimulate-somatic-embryogenesis-and-plant-propagation-of-pelargonium-sidoides
#19
Stefanie Duchow, Renate I Dahlke, Thomas Geske, Wolfgang Blaschek, Birgit Classen
Root extracts of the medicinal plant Pelargonium sidoides, native to South Africa, are used globally for the treatment of common cold and cough. Due to an increasing economic commercialization of P. sidoides remedies, wild collections of root material should be accompanied by effective methods for plant propagation like somatic embryogenesis. Based on this, the influence of arabinogalactan-proteins (AGPs) on somatic embryogenesis and plant propagation of P. sidoides has been investigated. High-molecular weight AGPs have been isolated from dried roots as well as from cell cultures of P...
November 5, 2016: Carbohydrate Polymers
https://www.readbyqxmd.com/read/27489583/glycosylation-of-arabinogalactan-proteins-essential-for-development-in-arabidopsis
#20
Allan M Showalter, Debarati Basu
Arabinogalactan-proteins (AGPs) are ubiquitous cell wall components present throughout the plant kingdom. They are extensively post translationally modified by conversion of proline to hydroxyproline (Hyp) and by addition of arabinogalactan (AG) polysaccharides to Hyp residues. Two small gene subfamilies within the CAZy GT31 family, referred to as Hyp-galactosyltransferases (Hyp-GALTs and HPGTs), encode enzymes that specifically add galactose to AGP protein backbones as revealed by heterologous expression of the genes coupled with an in vitro enzyme assay and by biochemical characterization of the genetic knock-out mutants...
May 2016: Communicative & Integrative Biology
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