ABA-independent PP2C-binding in PYLs traces to bacterial origins and persists in land plants
Tianjiao Lu, Qingzhong Li, Tao Hu, Wenqi Li, Yafei Lu, Huiling Huang, Yang Zhao · 2025
Read ABA-independent PP2C-binding in PYLs traces to bacterial origins and persists in land plants by Tianjiao Lu, Qingzhong Li, Tao Hu, Wenqi Li, Yafei Lu, Huiling Huang, Yang Zhao (2025) in the Tower of Babel, a free online library of public-domain works preserved in clean, searchable text. No sign-up. The full text is served as a plain-text file at a predictable URL, where text is present: https://antarctic-labs.com/tower-of-babel/pmc-12717121.txt.
Description
Tianjiao Lu and co-authors trace plant hormone receptors that bind their partner phosphatases even without the hormone abscisic acid, and find the trait may come from bacteria. These PYL receptors help land plants survive drying. Some PYL-like proteins bind PP2C phosphatases at a steady level but gain nothing from the hormone, unlike standard receptors.
The team found such proteins in a bacterium, in algae, and in seed plants. Two fixed residues mark the hormone-dependent form. In dry seeds, the hormone-free forms run high, and a transcription factor keeps their stress signal local during seed ripening. A horizontal gene transfer from bacteria is the likely origin, the authors argue.
Catalog record
| CREATOR | Tianjiao Lu, Qingzhong Li, Tao Hu, Wenqi Li, Yafei Lu, Huiling Huang, Yang Zhao |
|---|---|
| YEAR | 2025 |
| COLLECTION | PAPERS |
| FORMAT | TXT |
| FILE SIZE | 68 KB |
| VERSION | 1.0 |
| LICENSE | CC BY 4.0 |
| RIGHTS | CC BY |
| SOURCE | Europe PMC |