{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,24]],"date-time":"2026-09-24T01:58:00Z","timestamp":1790215080889,"version":"4.1.0"},"reference-count":66,"publisher":"FapUNIFESP (SciELO)","issue":"2","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["An. Acad. Bras. Ci\u00eanc."],"published-print":{"date-parts":[[2014,6]]},"abstract":"<jats:p>To contribute to the development of products to controlMeloidogyne exigua, the bacteria Bacillus cereus and B. subtilis were cultivated in liquid medium to produce metabolites active against this plant-parasitic nematode. Fractionation of the crude dichloromethane extracts obtained from the cultures afforded uracil, 9H-purine and dihydrouracil. All compounds were active against M. exigua, the latter being the most efficient. This substance presented a LC50 of 204 \u00b5g\/mL against the nematode, while a LC50 of 260 \u00b5g\/mL was observed for the commercial nematicide carbofuran. A search for protein-ligand complexes in which the ligands were structurally similar to dihydrouracil resulted in the selection of phosphoribosyltransferases, the sequences of which were used in an in silico search in the genome of M. incognita for a similar sequence of amino acids. The resulting sequence was modelled and dihydrouracil and 9H-purine were inserted in the active site of this putative phosphoribosyltransferase resulting in protein-ligand complexes that underwent molecular dynamics simulations. Calculation of the binding free-energies of these complexes revealed that the dissociation constant of dihydrouracil and 9H-purine to this protein is around 8.3 x 10-7 and 1.6 x 10-6 M, respectively. Consequently, these substances and the putative phosphoribosyltransferase are promising for the development of new products to control M. exigua.<\/jats:p>","DOI":"10.1590\/0001-3765201402412","type":"journal-article","created":{"date-parts":[[2014,4,23]],"date-time":"2014-04-23T22:40:22Z","timestamp":1398292822000},"page":"525-538","source":"Crossref","is-referenced-by-count":40,"title":["Purification and identification of metabolites produced by Bacillus cereus and B. subtilis active against Meloidogyne exigua, and their in silico interaction with a putative phosphoribosyltransferase fromM. incognita"],"prefix":"10.1590","volume":"86","author":[{"given":"DENILSON F.","family":"OLIVEIRA","sequence":"first","affiliation":[{"name":"Universidade Federal de Lavras, Brasil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"HELV\u00c9CIO M. 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