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http://dx.doi.org/10.1016/0042-6822(74)90194-9 | DOI Listing |
The glycoprotein hormones of humans, produced in the pituitary and acting through receptors in the gonads to support reproduction and in the thyroid gland for metabolism, have co-evolved from invertebrate counterparts . These hormones are heterodimeric cystine-knot proteins; and their receptors bind the cognate hormone at an extracellular domain and transmit the signal of this binding through a transmembrane domain that interacts with a heterotrimeric G protein. Structures determined for the human receptors as isolated for cryogenic electron microscopy (cryo-EM) are all monomeric despite compelling evidence for their functioning as dimers .
View Article and Find Full Text PDFPlant Sci
January 2025
Key Laboratory for Zhejiang Super Rice Research, Chinese National Center for Rice Improvement and Stat Key Laboratory of Rice Biology and Breeding, China National Rice Research Institute, HangZhou, Zhejiang, 311402, China. Electronic address:
Culm strength is crucial for rice growth, nutrition transportation, and structural resilience, which are essential for lodging resistance and stable production. In this study, we identified a rice thin culm mutant tc4, characterized by thinner culms and thicker cavity walls, resulting in weakened culm mechainical strength. Using map-based cloning, the candidate gene was isolated, and complementation and CRISPR/Cas9 experiments confirmed that a single nucleotide substitution in TC4 is responsible for the thin and brittle culm phenotype.
View Article and Find Full Text PDFPlants (Basel)
December 2024
College of Agronomy, Hunan Agricultural University, Changsha 410128, China.
Glume-opening of thermosensitive genic male sterile (TGMS) rice ( L.) lines after anthesis is a serious problem that significantly reduces the yield and quality of hybrid seeds. However, the molecular mechanisms regulating the opening and closing of rice glumes remain largely unclear.
View Article and Find Full Text PDFBiochemistry
January 2025
Institute of Microbiology, Eidgenössische Technische Hochschule (ETH) Zurich, Vladimir-Prelog-Weg 4, 8093 Zurich, Switzerland.
Janustatin A is a potently cytotoxic polyketide alkaloid produced at trace amounts by the marine bacterial plant symbiont . Its biosynthetic terminus features an unusual pyridine-containing bicyclic system of unclear origin, in which polyketide and amino acid extension units appear reversed compared to the order of enzymatic modules in the polyketide synthase (PKS)-nonribosomal peptide synthetase (NRPS) assembly line. To elucidate unknown steps in heterocycle formation, we first established robust genome engineering tools in .
View Article and Find Full Text PDFFront Microbiol
December 2024
Department of Food and Animal Biotechnology, Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, Republic of Korea.
Introduction: is a notorious foodborne pathogen, frequently contaminating powdered infant formula and causing life-threatening diseases in infants. The escalating emergence of antibiotics-resistant mutants has led to increased interest in using bacteriophage as an alternative antimicrobial agent.
Methods: Two phages, CR8 and S13, were isolated from feces and soil samples and their morphology, physiology, and genomics were characterized.
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