{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,14]],"date-time":"2026-10-14T11:46:59Z","timestamp":1791978419664,"version":"4.4.0"},"reference-count":89,"publisher":"MDPI AG","issue":"15","license":[{"start":{"date-parts":[[2022,8,7]],"date-time":"2022-08-07T00:00:00Z","timestamp":1659830400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Ministerio de Ciencia e Innovaci\u00f3n","award":["RTI2018-094655-B-I00"],"award-info":[{"award-number":["RTI2018-094655-B-I00"]}]},{"name":"Ministerio de Ciencia e Innovaci\u00f3n","award":["RTC2019-006865-1"],"award-info":[{"award-number":["RTC2019-006865-1"]}]},{"name":"Ministerio de Ciencia e Innovaci\u00f3n","award":["RTI2018-094655-B-I00"],"award-info":[{"award-number":["RTI2018-094655-B-I00"]}]},{"name":"Ministerio de Ciencia e Innovaci\u00f3n","award":["RTC2019-006865-1"],"award-info":[{"award-number":["RTC2019-006865-1"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["IJMS"],"abstract":"<jats:p>The proper regulation of nucleotide pools is essential for all types of cellular functions and depends on de novo nucleotide biosynthesis, salvage, and degradation pathways. Despite the apparent essentiality of these processes, a significant number of rare diseases associated with mutations in genes encoding various enzymes of these pathways have been already identified, and others are likely yet to come. However, knowledge on genetic alterations impacting on nucleoside and nucleobase transporters is still limited. At this moment three gene-encoding nucleoside and nucleobase transporter proteins have been reported to be mutated in humans, SLC29A1, SLC29A3, and SLC28A1, impacting on the expression and function of ENT1, ENT3, and CNT1, respectively. ENT1 alterations determine Augustine-null blood type and cause ectopic calcification during aging. ENT3 deficiency translates into various clinical manifestations and syndromes, altogether listed in the OMIM catalog as histiocytosis-lymphoadenopathy plus syndrome (OMIM#602782). CNT1 deficiency causes uridine-cytidineuria (URCTU) (OMIM#618477), a unique type of pyrimidineuria with an as yet not well-known clinical impact. Increasing knowledge on the physiological, molecular and structural features of these transporter proteins is helping us to better understand the biological basis behind the biochemical and clinical manifestations caused by these deficiencies. Moreover, they also support the view that some metabolic compensation might occur in these disturbances, because they do not seem to significantly impact nucleotide homeostasis, but rather other biological events associated with particular subtypes of transporter proteins.<\/jats:p>","DOI":"10.3390\/ijms23158770","type":"journal-article","created":{"date-parts":[[2022,8,7]],"date-time":"2022-08-07T22:51:46Z","timestamp":1659912706000},"page":"8770","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":12,"title":["Inborn Errors of Nucleoside Transporter (NT)-Encoding Genes (SLC28 and SLC29)"],"prefix":"10.3390","volume":"23","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-3712-1773","authenticated-orcid":false,"given":"Mar\u00e7al","family":"Pastor-Anglada","sequence":"first","affiliation":[{"name":"Departament de Bioqu\u00edmica i Biomedicina Molecular, Institut de Biomedicina de la Universitat de Barcelona (IBUB), Universitat de Barcelona, 08028 Barcelona, Spain"},{"name":"Institut de Recerca Sant Joan de D\u00e9u (IR SJD), Esplugues de Llobregat, 08950 Barcelona, Spain"},{"name":"Centro de Investigaci\u00f3n Biom\u00e9dica en Red de Enfermedades Hep\u00e1ticas y Digestivas (CIBER EHD), Instituto de Salud Carlos III, 28029 Madrid, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5458-3219","authenticated-orcid":false,"given":"Aida","family":"Mata-Ventosa","sequence":"additional","affiliation":[{"name":"Departament de Bioqu\u00edmica i Biomedicina Molecular, Institut de Biomedicina de la Universitat de Barcelona (IBUB), Universitat de Barcelona, 08028 Barcelona, Spain"},{"name":"Institut de Recerca Sant Joan de D\u00e9u (IR SJD), Esplugues de Llobregat, 08950 Barcelona, Spain"},{"name":"Centro de Investigaci\u00f3n Biom\u00e9dica en Red de Enfermedades Hep\u00e1ticas y Digestivas (CIBER EHD), Instituto de Salud Carlos III, 28029 Madrid, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2785-5602","authenticated-orcid":false,"given":"Sandra","family":"P\u00e9rez-Torras","sequence":"additional","affiliation":[{"name":"Departament de Bioqu\u00edmica i Biomedicina Molecular, Institut de Biomedicina de la Universitat de Barcelona (IBUB), Universitat de Barcelona, 08028 Barcelona, Spain"},{"name":"Institut de Recerca Sant Joan de D\u00e9u (IR SJD), Esplugues de Llobregat, 08950 Barcelona, Spain"},{"name":"Centro de Investigaci\u00f3n Biom\u00e9dica en Red de Enfermedades Hep\u00e1ticas y Digestivas (CIBER EHD), Instituto de Salud Carlos III, 28029 Madrid, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2022,8,7]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"164","DOI":"10.1016\/j.ymgme.2022.02.007","article-title":"Inborn errors of purine and pyrimidine metabolism: A guide to diagnosis","volume":"136","author":"Jurecka","year":"2022","journal-title":"Mol. 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