[Coral-List] another coral color paper
mikhail matz
matz at whitney.ufl.edu
Fri Jun 16 10:48:23 EDT 2006
Hello,
Since there seems to be some interest in the subject, here is another
paper of ours about evolution of coral color diversity:
Field, S. F., Bulina, M. Y., Kelmanson, I. V., Bielawski J. P. and Matz,
M. V. Adaptive evolution of multi-colored fluorescent proteins in
reef-building corals. /J. Mol. Evol./, 2006, *62*:332-339.
Abstract:
Here we investigate the evolutionary scenarios that led to the
appearance of fluorescent color diversity in reef-building corals. We
show that the mutations that have been responsible for the generation of
new cyan and red phenotypes from the ancestral green were fixed with the
help of positive natural selection. This fact strongly suggests that the
color diversity is a product of adaptive evolution. An unexpected
finding was a set of residues arranged as an intermolecular binding
interface, which was also identified as a target of positive selection
but is nevertheless not related to color diversification. We hypothesize
that multicolored fluorescent proteins evolved as part of a mechanism
regulating the relationships between the coral and its algal
endosymbionts (zooxanthellae). We envision that the effect of the
proteins’ fluorescence on algal physiology may be achieved not only
through photosynthesis modulation, but also through regulatory
photosensors analogous to phytochromes and cryptochromes of higher
plants. Such a regulation would require relatively subtle, but
spectrally precise, modifications of the light field. Evolution of such
a mechanism would explain both the adaptive diversification of colors
and the coevolutionary chase at the putative algae-protein binding
interface in coral fluorescent proteins.
I have lots of PDFs left....
cheers
Misha
--
Mikhail V. Matz
Whitney Laboratory for Marine Bioscience
University of Florida
9505 Ocean Shore Blvd
St Augustine FL 32080
phone 904-461-4025
fax 509-562-4749
web www.whitney.ufl.edu/research_programs/matz.htm
More information about the Coral-List
mailing list