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Identifiers and Description
Gene Model Identifier
TTHERM_00467500
Standard Name
MBD1 (Fusion of methylthioribulose-phosphate dehydratase and dihydroxy-keto-methylthiopentene dioxygenase)
Aliases
PreTt18652 | 55.m00207 | 3710.m00056
Description
Fusion of two genes involved in the methionine salvage pathway; methylthioribulose-1-phosphate dehydratase -mtnB; and 1,2-dihydroxy-3-keto-5-methylthiopentene dioxygenase - mtnD
MDE1 5-methylthioribulose-1-ph
osphate dehydratase; acts in t
he methionine salvage pathway;
potential Smt3p sumoylation s
ubstrate; expression downregul
ated by caspofungin and deleti
on mutant is caspofungin resis
tant
MBD1 is a gene fusion of two genes involved in the methionine salvage pathway: methylthioribulose-1-phosphate dehydratase -mtnB; and 1,2-dihydroxy-3-keto-5-methylthiopentene dioxygenase - mtnD.
These enzymes catalyze non-consecutive steps in the pathway. Interestingly the gene that codes for the intervening enzyme in the pathway, mtnC, is missing from the genome of Tetrahymena. Complementation tests in yeast were used to show that MBD1 from Tetrahymena is able to do in one step what yeast does in three, since it can rescue yeast knockouts of mtnB, mtnC, or mtnD (Salim, Negritto and Cavalcanti 2009).
Associated Literature
Ref:19851454: Salim HM, Negritto MC, Cavalcanti AR (2009) 1+1 = 3: a fusion of 2 enzymes in the methionine salvage pathway of Tetrahymena thermophila creates a trifunctional enzyme that catalyzes 3 steps in the pathway. PLoS genetics 5(10):e1000701