The early diverging ascomycetous budding yeast Saitoella complicata has three histone deacetylases belonging to the Clr6, Hos2, and Rpd3 lineages
Bibliographic record
Abstract
We sequenced the genomic DNA and the transcribed RNA of the ascomycetous budding yeast Saitoella complicata, which belongs to the earliest lineage (Taphrinomycotina) of ascomycetes. We found 3 protein-coding regions similar to Clr6 of Schizosaccharomyces (a member of Taphrinomycotina). Clr6 has a structure similar to that of Rpd3 and Hos2 of Saccharomyces. These proteins belong to the class 1 histone deacetylase (HDAC) family. The phylogenetic tree showed that the Clr6, Hos2, and Rpd3 lineages are separated in fungal HDACs. Basidiomycetes have 3 proteins belonging to the Clr6, Hos2, and Rpd3 lineages. On the other hand, whereas ascomycetes except for Schizosaccharomyces have the Hos2 and Rpd3 homologs, and lack the Clr6 homolog, Schizosaccharomyces has the Clr6 and Hos2 homologs, and lacks the Rpd3 homolog. Interestingly, Pneumocystis and Saitoella have 3 proteins belonging to the Clr6, Hos2, and Rpd3 lineages. Thus, these fungi are the first ascomycete found to possess all 3 types. Our findings indicated that Taphrinomycotina has conserved the Clr6 protein, suggesting that the ancestor of Dikarya (ascomycetes and basidiomycetes) had 3 proteins belonging to the Clr6, Hos2, and Rpd3 lineages. During ascomycete evolution, Pezizomycotina and Saccharomycotina appear to have lost their Clr6 homologs and Schizosaccharomyces to have lost its Rpd3 homolog.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".