{"id":6515,"date":"2021-12-19T09:37:51","date_gmt":"2021-12-19T08:37:51","guid":{"rendered":"https:\/\/botanico.uclm.es\/en\/project\/a-new-glycosyltransferase-enzyme-from-family-91-ugt91p3-is-responsible-for-the-final-glucosylation-step-of-crocins-in-saffron-crocus-sativus-l\/"},"modified":"2022-12-21T17:27:19","modified_gmt":"2022-12-21T16:27:19","slug":"a-new-glycosyltransferase-enzyme-from-family-91-ugt91p3-is-responsible-for-the-final-glucosylation-step-of-crocins-in-saffron-crocus-sativus-l","status":"publish","type":"project","link":"https:\/\/botanico.uclm.es\/en\/project\/a-new-glycosyltransferase-enzyme-from-family-91-ugt91p3-is-responsible-for-the-final-glucosylation-step-of-crocins-in-saffron-crocus-sativus-l\/","title":{"rendered":"A new glycosyltransferase enzyme from family 91, ugt91p3, is responsible for the final glucosylation step of crocins in saffron (Crocus sativus l.)"},"content":{"rendered":"<style type=\"text\/css\"> \n#cmsms_row_69f2f4a9314fd .cmsms_row_outer_parent { \n\tpadding-top: 0px; \n} \n\n#cmsms_row_69f2f4a9314fd .cmsms_row_outer_parent { \n\tpadding-bottom: 50px; \n} \n\n<\/style><div id=\"cmsms_row_69f2f4a9314fd\" class=\"cmsms_row cmsms_color_scheme_default\">\n<div class=\"cmsms_row_outer_parent\">\n<div class=\"cmsms_row_outer\">\n<div class=\"cmsms_row_inner\">\n<div class=\"cmsms_row_margin\">\n<div class=\"cmsms_column one_first\">\n<div class=\"cmsms_text\">\n<h2 class=\"Heading\">Resumen<\/h2>\n<p>Crocetin is an apocarotenoid formed from the oxidative cleavage of zeaxanthin, by the carotenoid cleavage enzymes CCD2 (in Crocus species) and specific CCD4 enzymes in Buddleja davidii and Gardenia jasminoides. Crocetin accumulates in the stigma of saffron in the form of glucosides and crocins, which contain one to five glucose molecules. Crocetin glycosylation was hypothesized to involve at least two enzymes from superfamily 1 UDP-sugar dependent glycosyl-transferases. One of them, UGT74AD1, produces crocins with one and two glucose molecules, which are substrates for a second UGT, which could belong to the UGT79, 91, or 94 families. An in silico search of Crocus transcriptomes revealed six candidate UGT genes from family 91. The transcript profiles of one of them, UGT91P3, matched the metabolite profile of crocin accumulation, and were co-expressed with UGT74AD1. In addition, both UGTs interact in a two-hybrid assay. Recombinant UGT91P3 produced mostly crocins with four and five glucose molecules in vitro, and in a combined transient expression assay with CCD2 and UGT74AD1 enzymes in Nicotiana benthamiana. These results suggest a role of UGT91P3 in the biosynthesis of highly glucosylated crocins in saffron, and that it represents the last missing gene in crocins biosynthesis. \u00a9 2021 by the authors. Licensee MDPI, Basel, Switzerland.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":0,"menu_order":0,"comment_status":"open","ping_status":"open","template":"","format":"standard","meta":[],"pj-categs":[74],"pj-tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v19.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>A new glycosyltransferase enzyme from family 91, ugt91p3, is responsible for the final glucosylation step of crocins in saffron (Crocus sativus l.) - Instituto Bot\u00e1nico<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/botanico.uclm.es\/en\/project\/a-new-glycosyltransferase-enzyme-from-family-91-ugt91p3-is-responsible-for-the-final-glucosylation-step-of-crocins-in-saffron-crocus-sativus-l\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"A new glycosyltransferase enzyme from family 91, ugt91p3, is responsible for the final glucosylation step of crocins in saffron (Crocus sativus l.) - 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