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TitleA sensory system for mating in octopus.
Journal, issue, pagesScience, Vol. 392, Issue 6793, Page 96-9101, Year 2026
Publish dateApr 2, 2026
AuthorsPablo S Villar / Hao Jiang / Tatiana Shugaeva / Emma L Berdan / Arpita Kulkarni / Makoto Hiroi / Giovanni Masucci / Sam Reiter / Erik Lindahl / Rebecca J Howard / Ryan E Hibbs / Nicholas W Bellono /
PubMed AbstractSensory systems for mate recognition maintain species boundaries and influence diversification. Thus, uncovering how molecules and receptors evolve to mediate this critical function is essential to ...Sensory systems for mate recognition maintain species boundaries and influence diversification. Thus, uncovering how molecules and receptors evolve to mediate this critical function is essential to understanding biodiversity. Male octopuses use a specialized arm called the hectocotylus to identify females and navigate their internal organs to reach the oviduct and deliver sperm. Here, we discovered that the hectocotylus is a dual sensory and mating organ that uses contact-dependent chemosensation of progesterone, a conserved ovarian hormone. We identified chemotactile receptors for progesterone and resolved the structural basis for their evolution from ancestral neurotransmitter receptors and subsequent expansion and tuning across cephalopods. These findings reveal principles by which sensory innovations shape reproductive behavior and suggest mechanisms for how sensory evolution contributes to the diversification of life.
External linksScience / PubMed:42012846
MethodsEM (single particle)
Resolution2.8 Å
Structure data

72977

9yi4

EMDB-72977, PDB-9yi4:
Octopus sensory receptor CRT1 bound to Progesterone
Method: EM (single particle) / Resolution: 2.8 Å

Chemicals

ChemComp-NAG:
2-acetamido-2-deoxy-beta-D-glucopyranose

ChemComp-STR:
PROGESTERONE

Source
  • octopus bimaculoides (California two-spot octopus)
KeywordsMEMBRANE PROTEIN / complex

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