PubMed:10076015 JSONTXT

{"target":"https://pubannotation.org/docs/sourcedb/PubMed/sourceid/10076015","sourcedb":"PubMed","sourceid":"10076015","source_url":"http://www.ncbi.nlm.nih.gov/pubmed/10076015","text":"Characterization of a novel unconjugated pteridine glycoside, cyanopterin, in Synechocystis sp. PCC 6803.\nA new pteridine glycoside, called cyanopterin, was isolated from Synechocystis sp. PCC 6803 and its structure was elucidated as 6-[1-(4-O-methyl-(alpha-d-glucuronyl)-(1, 6)-(beta-d-galactosyloxy]methylpterin by chemical degradation and 1H- and 13C-NMR spectroscopic means. Cyanopterin is constitutively synthesized at a relatively high intracellular concentration that is comparable to that of chlorophyll a in a molar ratio of approximately 1 to 1.6. The in vivo oxidation state of cyanopterin is primarily the fully reduced 5,6,7,8-tetrahydro form. The cellular function is unknown at present. The findings have established a model system, using Synechocystis sp. PCC 6803, for studies of the physiological functions of unconjugated pteridine glycosides found mostly in cyanobacteria.","tracks":[{"project":"mondo_disease","denotations":[{"id":"T1","span":{"begin":96,"end":99},"obj":"Disease"},{"id":"T3","span":{"begin":189,"end":192},"obj":"Disease"},{"id":"T5","span":{"begin":772,"end":775},"obj":"Disease"}],"attributes":[{"id":"A1","pred":"mondo_id","subj":"T1","obj":"http://purl.obolibrary.org/obo/MONDO_0004974"},{"id":"A2","pred":"mondo_id","subj":"T1","obj":"http://purl.obolibrary.org/obo/MONDO_0022673"},{"id":"A3","pred":"mondo_id","subj":"T3","obj":"http://purl.obolibrary.org/obo/MONDO_0004974"},{"id":"A4","pred":"mondo_id","subj":"T3","obj":"http://purl.obolibrary.org/obo/MONDO_0022673"},{"id":"A5","pred":"mondo_id","subj":"T5","obj":"http://purl.obolibrary.org/obo/MONDO_0004974"},{"id":"A6","pred":"mondo_id","subj":"T5","obj":"http://purl.obolibrary.org/obo/MONDO_0022673"},{"subj":"T1","pred":"source","obj":"mondo_disease"},{"subj":"T3","pred":"source","obj":"mondo_disease"},{"subj":"T5","pred":"source","obj":"mondo_disease"}]},{"project":"NCBITAXON","denotations":[{"id":"T1","span":{"begin":78,"end":91},"obj":"OrganismTaxon"},{"id":"T2","span":{"begin":171,"end":184},"obj":"OrganismTaxon"},{"id":"T3","span":{"begin":754,"end":767},"obj":"OrganismTaxon"},{"id":"T4","span":{"begin":878,"end":891},"obj":"OrganismTaxon"}],"attributes":[{"id":"A1","pred":"db_id","subj":"T1","obj":"1142"},{"id":"A2","pred":"db_id","subj":"T2","obj":"1142"},{"id":"A3","pred":"db_id","subj":"T3","obj":"1142"},{"id":"A4","pred":"db_id","subj":"T4","obj":"1117"},{"subj":"T1","pred":"source","obj":"NCBITAXON"},{"subj":"T2","pred":"source","obj":"NCBITAXON"},{"subj":"T3","pred":"source","obj":"NCBITAXON"},{"subj":"T4","pred":"source","obj":"NCBITAXON"}]},{"project":"Anatomy-UBERON","denotations":[{"id":"T1","span":{"begin":442,"end":455},"obj":"Body_part"},{"id":"T2","span":{"begin":519,"end":524},"obj":"Body_part"}],"attributes":[{"id":"A1","pred":"uberon_id","subj":"T1","obj":"http://purl.obolibrary.org/obo/GO_0005622"},{"id":"A2","pred":"uberon_id","subj":"T2","obj":"http://purl.obolibrary.org/obo/UBERON_0003655"},{"subj":"T1","pred":"source","obj":"Anatomy-UBERON"},{"subj":"T2","pred":"source","obj":"Anatomy-UBERON"}]}],"config":{"attribute types":[{"pred":"source","value type":"selection","values":[{"id":"mondo_disease","color":"#ec93e1","default":true},{"id":"NCBITAXON","color":"#93ecdc"},{"id":"Anatomy-UBERON","color":"#ecc293"}]}]}}