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Here, using several methodologies, we analyze Asn-linked and Ser\/Thr\/Tyr-linked protein glycosylation between brain regions and sexes in mice. Brain N-glycans are less complex in sequence and variety compared to other tissues, consisting predominantly of high-mannose and fucosylated\/bisected structures. Most brain O-glycans are unbranched, sialylated O-GalNAc and O-mannose structures. A consistent pattern is observed between regions, and sex differences are minimal compared to those in plasma. Brain glycans correlate with RNA expression of their synthetic enzymes, and analysis of glycosylation genes in humans show a global downregulation in the brain compared to other tissues. We hypothesize that this restricted repertoire of protein glycans arises from their tight regulation in the brain. These results provide a roadmap for future studies of glycosylation in neurodevelopment and disease.<\/jats:p>","DOI":"10.1038\/s41467-021-27781-9","type":"journal-article","created":{"date-parts":[[2022,1,12]],"date-time":"2022-01-12T06:02:59Z","timestamp":1641967379000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":114,"title":["Mammalian brain glycoproteins exhibit diminished glycan complexity compared to other tissues"],"prefix":"10.1038","volume":"13","author":[{"given":"Sarah E.","family":"Williams","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2621-7374","authenticated-orcid":false,"given":"Maxence","family":"Noel","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sylvain","family":"Lehoux","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Murat","family":"Cetinbas","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5630-5167","authenticated-orcid":false,"given":"Ramnik J.","family":"Xavier","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ruslan I.","family":"Sadreyev","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Edward M.","family":"Scolnick","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0381-6334","authenticated-orcid":false,"given":"Jordan W.","family":"Smoller","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8918-5034","authenticated-orcid":false,"given":"Richard D.","family":"Cummings","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5963-2836","authenticated-orcid":false,"given":"Robert G.","family":"Mealer","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2022,1,12]]},"reference":[{"key":"27781_CR1","doi-asserted-by":"publisher","first-page":"89","DOI":"10.1042\/BST20180330","volume":"47","author":"S Iqbal","year":"2019","unstructured":"Iqbal, S., Ghanimi Fard, M., Everest-Dass, A., Packer, N. 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