Results 21 to 30 of about 11,005 (181)

A Suppressor Mutation Partially Reverts the xantha Trait via Lowered Methylation in the Promoter of Genomes Uncoupled 4 in Rice

open access: yesFrontiers in Plant Science, 2019
The xantha trait of a yellow leaf rice mutant (HYB), controlled epigenetically by elevated CHG methylation of the genomes uncoupled 4 (OsGUN4) promoter, has reduced chlorophyll content, altered tetrapyrrole biosynthesis, and deregulated transcription of ...
Meng Jiang   +13 more
doaj   +1 more source

Different spectrum of Arabidopsis CHLH/GUN5 protein functions in tetrapyrrole metabolism, plastid signaling and ABA responses in guard cells

open access: yesFrontiers in Plant Science, 2016
Expression of Photosynthesis-Associated Nuclear Genes (PhANGs) is controlled by environmental stimuli and plastid-derived signals (plastid signals) transmitting the developmental and functional status of plastids to the nucleus.
Harue Ibata   +2 more
doaj   +1 more source

Vibrational Spectroscopy of Phytochromes

open access: yesBiomolecules, 2023
Phytochromes are biological photoswitches that translate light into physiological functions. Spectroscopic techniques are essential tools for molecular research into these photoreceptors.
Peter Hildebrandt
doaj   +1 more source

Boron-containing tetrapyrroles

open access: yesTURKISH JOURNAL OF CHEMISTRY, 2014
The recent advances in the synthesis of carborane and boronic ester-substituted tetrapyrroles (porphyrins, porphyrazines, and phthalocyanines) are reviewed together with their possible utilization as agents for photodynamic therapy (PDT) and boron neutron capture therapy of cancer (BNCT) as well as dual PDT/BNCT sensitizers.
Ozcelik, Sennur, Gul, Ahmet
openaire   +2 more sources

Leishmania major possesses a unique HemG-type protoporphyrinogen IX oxidase

open access: yesBioscience Reports, 2014
Leishmania major was proposed to either utilize haem from its host or partially synthesize the tetrapyrrole from host provided precursors. However, only indirect evidence was available for this partial late haem biosynthetic pathway. Here, we demonstrate
Dagmar Zwerschke   +3 more
doaj   +1 more source

Barley Plants Overexpressing Ferrochelatases (HvFC1 and HvFC2) Show Improved Photosynthetic Rates and Have Reduced Photo-Oxidative Damage under Drought Stress than Non-Transgenic Controls

open access: yesAgronomy, 2020
We investigated the roles of two Ferrochelatases (FCs), which encode the terminal enzyme for heme biosynthesis, in drought and oxidative stress tolerance in model cereal plant barley (Hordeum vulgare).
Dilrukshi S. K. Nagahatenna   +4 more
doaj   +1 more source

Heme, Heme Oxygenase-1, Statins, and SARS-CoV-2

open access: yesAntioxidants, 2023
Heme, a metalloporphyrin, or more specifically, a tetrapyrrole containing ferrous iron, is an ancient molecule [...]
David K. Stevenson   +2 more
doaj   +1 more source

tetrapyrroles [PDF]

open access: yes, 2014
Citation: 'tetrapyrroles' in the IUPAC Compendium of Chemical Terminology, 3rd ed.; International Union of Pure and Applied Chemistry; 2006. Online version 3.0.1, 2019. 10.1351/goldbook.T06291 • License: The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International for individual terms. Requests for commercial
openaire   +1 more source

Crystal structure of 4-(methoxycarbonyl)phenylboronic acid

open access: yesActa Crystallographica Section E: Crystallographic Communications, 2015
In the title compound, C8H9BO4, the methoxycarbonyl group is rotated out of the plane of the benzene ring by 7.70 (6)°. In the crystal, molecules are linked via pairs of O—H...O hydrogen bonds, involving the boronic acid OH groups, forming inversion ...
Keith J. Flanagan, Mathias O. Senge
doaj   +1 more source

MicroRNA156 (miR156) Negatively Impacts Mg-Protoporphyrin IX (Mg-Proto IX) Biosynthesis and Its Plastid-Nucleus Retrograde Signaling in Apple

open access: yesPlants, 2020
Plastid-nucleus retrograde signaling (PNRS) play essential roles in regulating nuclear gene expression during plant growth and development. Excessive reactive oxygen species can trigger PNRS.
Qingbo Zheng   +8 more
doaj   +1 more source

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