| Comparative Genomics
Centre scientist Dave Miller made the cover of the biologist's version
of 'Rolling Stone' when his work was featured on the December issue
of Current Biology. His work characterising an expressed gene library
from the coral Acropora millipora revealed that coral possess many of the
genes previously thought to be characteristic of vertebrates like man.
So significant are the implications of this finding that it was discussed
in a Nature editorial (426: 744) and was featured on the Science
Magazine web site. Carina Dennis, writing for Nature, said,
"This finding means that although fly and worm models are useful for studying
gene function in development and cellular processes, they may be of limited
value in studies of evolution of human genes."
PRESS RELEASE: Coral and Man - Not so Distant
Relatives
The earliest animals wandered around on the ancient
seabed with a swag of genes common to you and I, a new study reveals.
The research by scientists at JCU and the Australian
National University turns upside down many traditional assumptions about
what makes vertebrates such as man unique, and what has happened at the
level of the genome during animal evolution.
Researchers who analysed the genes expressed in
the coral Acropora millepora discovered many of the same genes as those
found in humans but which are distinctly absent from animals such as the
fruit fly and nematode worm.
The findings are reported this week in the Current
Biology journal.
Reader in Biochemistry and Molecular Biology at
JCU and co-author of the paper, Dr David Miller, said many coral genes
were surprisingly like human genes, although the roles of these genes remained
to be established.
Dr Miller said it had generally been assumed that
the complexity of the human body relative to simpler animals such as insects,
worms or corals was the result of new types of genes that arose during
the evolution of vertebrates.
These conclusions were drawn after studies of
the fruit fly and nematode worm revealed both these creatures lacked many
types of genes found in humans, he said.
"The major surprise from the project is that the
coral genome contains many genes previously known only from vertebrates,"
Dr Miller said.
"The existence of the genes in a coral indicates
that rather than having evolved in vertebrates, many genes previously thought
to be vertebrate-specific in fact have much older origins and have simply
been lost from organisms like the fly and nematode worm kicked out as
these invertebrate lineages evolved," he said.
"That such a simple animal should contain many
genes associated with complex functions in mammals is counterintuitive.
"A major challenge now is to explore the likely
roles of these coral genes in order to better understand which aspects
of gene function are common between corals, some of the simplest of living
animals, and humans, one of the most complex." |