Resumen

TAMAYO-ORDONEZ, Y.J. et al. Assembly of the Cereus fernambucensis Genome, Gene Annotation, and Tertiary Structure of Secondary Metabolism Enzymes in Carnegiea gigantea, Lophocereus schottii, Pachycereus pringlei, Pereskia humboldtii, Selenicereus undatus, and Stenocereus thurberi. J. Mex. Chem. Soc [online]. 2023, vol.67, n.3, pp.284-304.  Epub 22-Abr-2024. ISSN 1870-249X.  https://doi.org/10.29356/jmcs.v67i3.1969.

Recently, there is growing interest in obtaining bioactive compounds from species in the family Cactaceae, which has been little analyzed at the genomic and transcriptomic level. We here report the assembly of the genome of Cereus fernambucensis and we analyzed six cactus genomes (Carnegiea gigantea, Lophocereus schottii, Pachycereus pringlei, Pereskia humboldtii, Selenicereus undatus and Stenocereus thurberi), the annotation of putative genes, and the modeling of the three-dimensional structures of their predicted proteins involved in flavonoid metabolism. We identified genes encoding proteins related to plant pathogenesis (PR-10), coding secuences (CDS) of aldehyde reductase and flavonoid reductase, CDS of enzymes involved in the biosynthesis of phenolic compounds, and ABC transporters. The grouping of the enzymes aspartic proteinase-like protein, flavanone 3-hydroxylase (F3H), hydroxycinnamoyl-CoA shikimate/quinate hydroxycinnamoyl transferase (HCT), and protein serine/threonine- phosphatase was shown to be highly conserved in the genomes of the analyzed cacti. We found divergence of the plant PDR ABC-type transporter family protein (PEN3) in Cereus fernambucensis and the absence in this species of sterol methyltransferase (SMT1). Our three-dimensional modeling of the tertiary structure of F3H from a consensus sequence of cactus species had 88 % identity with that reported in Arabidopsis thaliana. We observed the conservation in several plant species of the 2-oxoglutarate and iron-dependent domain of F3H. This is the first report of an exploration of putative genes encoding enzymes involved in secondary metabolism in cacti species providing information that could be used to improve the production of bioactive compounds in them.

Palabras llave : Cactaceae; genome assembly; gene annotation; secondary metabolism; bioactive compounds.