A DNA region of Torulaspora delbrueckii containing the HIS3 gene: sequence, gene order and evolution.
We cloned a genomic DNA fragment of the yeast Torulaspora delbrueckii by complementation of a Saccharomyces cerevisiae his3 mutant strain. DNA sequence analysis revealed that the fragment contained two complete ORFs, which share a high similarity with S. cerevisiae His3p and Mrp51p, respectively. The cloned TdHIS3 gene fully complemented the his3 mutation of S. cerevisiae, confirming that it encodes for the imidazoleglycerol-phosphate dehydrate of T. delbrueckii. Two additional ORFs, with a high homology to S. cerevisiae PET56 and DED1 genes, were mapped upstream and downstream from TdHIS3 and TdMRP51, respectively. This genetic organization is analogous to that previously found in Saccharomyces kluyveri and Zygosaccharomyces rouxii. The evolutionary significance of gene order in this chromosomal region is analysed and discussed.
Aller-Arranz
Elena
E
Department of Biotechnology, Instituto de Agroquímica y Tecnología de los Alimentos, Consejo Superior de Investigaciones Científicas, 46100-Burjassot Valencia, Spain.
Randez-Gil
Francisca
F
Barrio
Eladio
E
Prieto
Jose Antonio
JA
D000595:Amino Acid Sequence; D001483:Base Sequence; D018797:Cell Cycle Proteins / Q000235:genetics; D003001:Cloning, Molecular; D053487:DEAD-box RNA Helicases; D004271:DNA, Fungal / Q000737:chemistry / Q000235:genetics; D019143:Evolution, Molecular; D005656:Fungal Proteins / Q000235:genetics; D006836:Hydro-Lyases / Q000235:genetics*; D008780:Methyltransferases / Q000235:genetics; D008969:Molecular Sequence Data; D016366:Open Reading Frames; D010802:Phylogeny; D020365:RNA Helicases / Q000235:genetics; D029701:Saccharomyces cerevisiae Proteins / Q000235:genetics; D004718:Saccharomycetales / Q000201:enzymology / Q000235:genetics*; D016415:Sequence Alignment; D014158:Transcription, Genetic
D018797:Cell Cycle Proteins; D004271:DNA, Fungal; D005656:Fungal Proteins; D029701:Saccharomyces cerevisiae Proteins; C084864:MRM1 protein, S cerevisiae; D008780:Methyltransferases; C492152:DED1 protein, S cerevisiae; D053487:DEAD-box RNA Helicases; D020365:RNA Helicases; D006836:Hydro-Lyases; C021434:imidazoleglycerolphosphate dehydratase