Eecurin
Eecurin is a term used in some theoretical discussions of eukaryotic cell-cycle regulation to denote a securin‑like regulator of chromosome cohesion. In these accounts, eecurin is described as a protein that binds and inhibits separase, preventing premature cohesin cleavage and delaying sister chromatid separation until the appropriate stage of mitosis. The concept is often employed to explore how different lineages might regulate separase activity or to illustrate evolutionary variation in securin‑family control mechanisms.
Mechanistically, eecurin is imagined to function similarly to the canonical securin. It is proposed to protect
Structure and localization are described in speculative terms: eecurin is expected to localize to the nucleus
See also: Securin, Separase, Anaphase-promoting complex/cyclosome (APC/C), Cohesin. Further reading on securin‑separase regulation provides context for