{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,2]],"date-time":"2026-01-02T07:02:43Z","timestamp":1767337363448},"reference-count":39,"publisher":"American Society for Microbiology","issue":"24","license":[{"start":{"date-parts":[[2008,12,15]],"date-time":"2008-12-15T00:00:00Z","timestamp":1229299200000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.asm.org\/non-commercial-tdm-license"}],"content-domain":{"domain":["journals.asm.org"],"crossmark-restriction":true},"short-container-title":["J Bacteriol"],"published-print":{"date-parts":[[2008,12,15]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n          <jats:p>\n            Trehalose is the primary organic solute in\n            <jats:italic>Rubrobacter xylanophilus<\/jats:italic>\n            under all conditions tested, including those for optimal growth. We detected genes of four different pathways for trehalose synthesis in the genome of this organism, namely, the trehalose-6-phosphate synthase (Tps)\/trehalose-6-phosphate phosphatase (Tpp), TreS, TreY\/TreZ, and TreT pathways. Moreover,\n            <jats:italic>R. xylanophilus<\/jats:italic>\n            is the only known member of the phylum\n            <jats:italic>Actinobacteria<\/jats:italic>\n            to harbor TreT. The Tps sequence is typically bacterial, but the Tpp sequence is closely related to eukaryotic counterparts. Both the Tps\/Tpp and the TreT pathways were active in vivo, while the TreS and the TreY\/TreZ pathways were not active under the growth conditions tested and appear not to contribute to the levels of trehalose observed. The genes from the active pathways were functionally expressed in\n            <jats:italic>Escherichia coli<\/jats:italic>\n            , and Tps was found to be highly specific for GDP-glucose, a rare feature among these enzymes. The trehalose-6-phosphate formed was specifically dephosphorylated to trehalose by Tpp. The recombinant TreT synthesized trehalose from different nucleoside diphosphate-glucose donors and glucose, but the activity in\n            <jats:italic>R. xylanophilus<\/jats:italic>\n            cell extracts was specific for ADP-glucose. The TreT could also catalyze trehalose hydrolysis in the presence of ADP, but with a very high\n            <jats:italic>\n              K\n              <jats:sub>m<\/jats:sub>\n            <\/jats:italic>\n            . Here, we functionally characterize two systems for the synthesis of trehalose in\n            <jats:italic>R. xylanophilus<\/jats:italic>\n            , a representative of an ancient lineage of the actinobacteria, and discuss a possible scenario for the exceptional occurrence of\n            <jats:italic>treT<\/jats:italic>\n            in this extremophilic bacterium.\n          <\/jats:p>","DOI":"10.1128\/jb.01055-08","type":"journal-article","created":{"date-parts":[[2008,10,4]],"date-time":"2008-10-04T01:09:11Z","timestamp":1223082551000},"page":"7939-7946","update-policy":"http:\/\/dx.doi.org\/10.1128\/asmj-crossmark-policy-page","source":"Crossref","is-referenced-by-count":36,"title":["A Unique Combination of Genetic Systems for the Synthesis of Trehalose in\n            <i>Rubrobacter xylanophilus<\/i>\n            : Properties of a Rare Actinobacterial TreT"],"prefix":"10.1128","volume":"190","author":[{"given":"Ana","family":"Nobre","sequence":"first","affiliation":[{"name":"Centro de Neurocie\u0302ncias e Biologia Celular, Departamento de Zoologia, Universidade de Coimbra, 3004-517 Coimbra, Portugal"}]},{"given":"Susana","family":"Alarico","sequence":"additional","affiliation":[{"name":"Centro de Neurocie\u0302ncias e Biologia Celular, Departamento de Zoologia, Universidade de Coimbra, 3004-517 Coimbra, Portugal"}]},{"given":"Chantal","family":"Fernandes","sequence":"additional","affiliation":[{"name":"Centro de Neurocie\u0302ncias e Biologia Celular, Departamento de Zoologia, Universidade de Coimbra, 3004-517 Coimbra, Portugal"}]},{"given":"Nuno","family":"Empadinhas","sequence":"additional","affiliation":[{"name":"Centro de Neurocie\u0302ncias e Biologia Celular, Departamento de Zoologia, Universidade de Coimbra, 3004-517 Coimbra, Portugal"},{"name":"Departamento de Bioqui\u0301mica, Universidade de Coimbra, 3001-401 Coimbra, Portugal"}]},{"given":"Milton S.","family":"da Costa","sequence":"additional","affiliation":[{"name":"Centro de Neurocie\u0302ncias e Biologia Celular, Departamento de Zoologia, Universidade de Coimbra, 3004-517 Coimbra, Portugal"},{"name":"Departamento de Bioqui\u0301mica, Universidade de Coimbra, 3001-401 Coimbra, Portugal"}]}],"member":"235","reference":[{"key":"e_1_3_2_2_2","doi-asserted-by":"crossref","first-page":"115","DOI":"10.1016\/0076-6879(66)08014-5","volume":"8","year":"1966","unstructured":"Ames, B. 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