Tian M, Mochizuki K, Loidl J (2022) Arrested crossover precursor structures form stable homologous bonds in a Tetrahymena meiotic mutant. PloS one 17(2):e0263691 PUBMED:35171923
Nabeel-Shah S, Garg J, Saettone A, Ashraf K, Lee H, Wahab S, Ahmed N, Fine J, Derynck J, Pu S, Ponce M, Marcon E, Zhang Z, Greenblatt JF, Pearlman RE, Lambert JP, Fillingham J (2021) Functional characterization of RebL1 highlights the evolutionary conservation of oncogenic activities of the RBBP4/7 orthologue in Tetrahymena thermophila. Nucleic acids research ( ): PUBMED:34086947
Nabeel-Shah S, Garg J, Kougnassoukou Tchara PE, Pearlman RE, Lambert JP, Fillingham J (2021) Functional proteomics protocol for the identification of interaction partners in Tetrahymena thermophila. STAR protocols 2(1):100362 PUBMED:33786459
FSF1 S-(hydroxymethyl)glutathione dehydrogenase/class III alcohol dehydrogenase; Formaldehyde dehydrogenase/S-formylglutathione hydrolase fusion protein; fusion protein containing two enzymes known to catalyze sequential steps in the formaldehyde detoxification pathway in yeast; this fusion unique to ciliates
SFA1 Bifunctional enzyme conta
ining both alcohol dehydrogena
se and glutathione-dependent f
ormaldehyde dehydrogenase acti
vities, functions in formaldeh
yde detoxification and formati
on of long chain and complex a
lcohols, regulated by Hog1p-Sk
o1p
A macronuclear chromosome containing a fusion gene was cloned from the spirotrichous ciliate Oxytricha trifallax. The gene encodes a single polypeptide containing homologs of two proteins that catalyze sequential steps in the formaldehyde detoxification pathway in Saccharomyces cerevisiae. These two proteins are formaldehyde dehydrogenase (FALDH) and S-formylglutathione hydrolase (SFGH); the fusion gene is called FSF1 (FALDH/SFGH Fusion 1). A similar gene was identified in the Tetrahymena thermophila genome sequence, and a T. thermophila EST sequenced from both ends showed that the fusion gene is expressed in this species in vivo. FSF1 has not yet been identified in other ciliates, but a fusion of these two genes has been identified in another group of protists, the diatoms. An EST from Phaeodactylum tricornutum and a gene from the genome sequence of Thalassiosira pseudonana both encode a fusion of these two genes, but in the opposite orientation of the ciliate genes. In diatoms, the SFGH domain is found N-terminal to the FALDH domain, suggesting that these two fusion genes evolved independently in ciliates and diatoms. The diatom genes were named SFF1 to highlight these differences.
Associated Literature
Ref:15858209: Stover NA, Cavalcanti AR, Li AJ, Richardson BC, Landweber LF (2005) Reciprocal fusions of two genes in the formaldehyde detoxification pathway in ciliates and diatoms. Molecular biology and evolution 22(7):1539-42
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