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Chimeras and ConsciousnessEvolution of the Sensory Self$
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Chimeras and Consciousness: Evolution of the Sensory Self

Lynn Margulis, Celeste A. Asikainen, and Wolfgang E. Krumbein

Print publication date: 2011

Print ISBN-13: 9780262015394

Published to MIT Press Scholarship Online: August 2013

DOI: 10.7551/mitpress/9780262015394.001.0001

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PRINTED FROM MIT PRESS SCHOLARSHIP ONLINE (www.mitpress.universitypressscholarship.com). (c) Copyright The MIT Press, 2022. All Rights Reserved. An individual user may print out a PDF of a single chapter of a monograph in MITSO for personal use.date: 27 May 2022

Alarmones

Alarmones

Chapter:
(p.34) (p.35) 3 Alarmones
Source:
Chimeras and Consciousness
Author(s):

Antonio Lazcano

Arturo Becerra

Luis Delaye

Publisher:
The MIT Press
DOI:10.7551/mitpress/9780262015394.003.0004

This chapter addresses the significance of alarmones, analogous to plant and animal hormones. It considers the remarkable conservation of cyclic adenosine monophosphate (cAMP), a social hormone related to sensation and action. It also places the roots of sensation in alarmones. This chapter suggests that alarmones may have first appeared during an early evolutionary stage. It shows that cAMP was already present in the Last Common Ancestor (LCA). It also reveals that the genes involved in cAMP synthesis may have undergone branch-specific gene duplications, lateral transfer events, and secondary losses, and may have evolved independently in different prokaryotes.

Keywords:   alarmones, cyclic adenosine monophosphate, sensation, Last Common Ancestor, gene duplications, lateral transfer events, secondary losses, prokaryotes

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