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| http://dx.doi.org/10.1073/pnas.45.11.1582 | DOI Listing |
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Identification and analysis of a unique group of glycoside hydrolase family 188 sequences with an altered sulfonate binding residue.
MicroPubl Biol
September 2024
Biological Sciences, University of Alabama, Tuscaloosa, Alabama, United States.
Sulfoquinovosyldiacylglycerol (SQDG) is a plant sulfolipid that plays a major role in the global sulfur cycle. Bacteria contain sulfoglycolytic pathways that are responsible for metabolizing SQDG which requires initial delipidation by a sulfolipase and sulfoquinovosidase (SQase). Recently, a new group of SQases was discovered and have been categorized in a separate glycoside hydrolase family (GH188).
View Article and Find Full Text PDFA lipid synthase maintains metabolic flux for jasmonate synthesis to regulate root growth and phosphate homeostasis.
Plant Physiol
August 2024
National Institute of Plant Genome Research, Aruna Asaf Ali Marg, New Delhi-110067, India.
Plants require phosphate (Pi) for proper growth and development but often face scarcity of this vital nutrient in the soil. Pi-starvation triggers membrane lipid remodeling to utilize the membrane phospholipid-bound Pi in plants. In this process, phospholipids are replaced by non-Pi-containing galactolipids (MGDG, DGDG) and sulfolipids.
View Article and Find Full Text PDFDetection of Sulfoquinovosidase Activity in Cell Lysates Using Activity-Based Probes.
Angew Chem Int Ed Engl
June 2024
York Structural Biology Laboratory, Department of Chemistry, University of York, York, YO10 5DD, UK.
Article Synopsis
- Sulfoquinovosyl diacylglycerol (SQDG) is a key sulfur reserve in nature, produced by plants, algae, and cyanobacteria, and is essential for biological sulfur utilization through its breakdown by microbes.
- The breakdown begins with sulfoquinovose being released through sulfoquinovosidases (SQases), enzymes encoded by specific gene clusters that facilitate various SQ catabolic pathways.
- Researchers developed activity-based probes (ABPs) to identify and visualize these enzymes, allowing for better tracking and understanding of SQase levels and activity across different bacterial growth stages and environments.
Quantitative Assessment of the Chloroplast Lipidome.
Methods Mol Biol
March 2024
Laboratoire de Physiologie Cellulaire et Végétale, CNRS, CEA, INRAE, Univ. Grenoble Alpes, IRIG, CEA Grenoble, Grenoble, France.
Article Synopsis
- Photosynthetic membranes in plants and algae have a distinct lipid composition, characterized by low phospholipid content and a high proportion of glycolipids, such as mono- and digalactosyldiacylglycerol (MGDG and DGDG) and sulfoquinovosyldiacylglycerol (SQDG).
- The lipid quartet of MGDG, DGDG, SQDG, and phosphatidylglycerol (PG) is highly conserved across various photosynthetic organisms, yet the fatty acid composition of these lipids can vary widely among species.
- To investigate chloroplast biogenesis, it's crucial to purify chloroplasts and analyze their lipid content, which involves methods for lipid extraction and quantification
Widespread Family of NAD-Dependent Sulfoquinovosidases at the Gateway to Sulfoquinovose Catabolism.
J Am Chem Soc
December 2023
School of Chemistry, University of Melbourne, Parkville, Victoria 3010, Australia.
The sulfosugar sulfoquinovose (SQ) is produced by photosynthetic plants, algae, and cyanobacteria on a scale of 10 billion tons per annum. Its degradation, which is essential to allow cycling of its constituent carbon and sulfur, involves specialized glycosidases termed sulfoquinovosidases (SQases), which release SQ from sulfolipid glycoconjugates, so SQ can enter catabolism pathways. However, many SQ catabolic gene clusters lack a gene encoding a classical SQase.
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