Proceedings of the National Academy of Sciences,
Год журнала:
2016,
Номер
113(43), С. 12214 - 12219
Опубликована: Окт. 10, 2016
Significance
Eukaryotic
photosynthetic
organelles
(plastids)
originated
>1
billion
y
ago
via
the
endosymbiosis
of
a
β-cyanobacterium.
The
resulting
proliferation
primary
producers
fundamentally
changed
our
planet’s
history,
allowing
for
establishment
human
populations.
Early
stages
plastid
integration,
however,
remain
poorly
understood,
including
role
horizontal
gene
transfer
from
nonendosymbiotic
bacteria.
Rules
governing
organellogenesis
are
difficult,
if
not
impossible,
to
evaluate
using
highly
derived
algal
and
plant
systems.
Insights
into
this
issue
provided
by
amoeba
Paulinella
chromatophora
,
which
contains
more
recently
established
α-cyanobacterial
origin.
Here
we
show
that
impact
Muller’s
ratchet
leads
endosymbiont
genome
reduction
seems
drive
fixation
horizontally
acquired
“compensatory”
bacterial
genes
in
host
nuclear
genome.
Nucleic Acids Research,
Год журнала:
2015,
Номер
44(D1), С. D286 - D293
Опубликована: Ноя. 17, 2015
eggNOG
is
a
public
resource
that
provides
Orthologous
Groups
(OGs)
of
proteins
at
different
taxonomic
levels,
each
with
integrated
and
summarized
functional
annotations.
Developments
since
the
latest
release
include
changes
to
algorithm
for
creating
OGs
across
making
nested
groups
hierarchically
consistent.
This
allows
better
propagation
terms
led
novel
annotation
95
890
previously
uncharacterized
OGs,
increasing
overall
coverage
from
67%
72%.
The
annotations
have
been
expanded
also
provide
Gene
Ontology
terms,
KEGG
pathways
SMART/Pfam
domains
group.
Moreover,
now
pairwise
orthology
relationships
within
based
on
analysis
phylogenetic
trees.
We
incorporated
framework
quickly
mapping
sequences
precomputed
HMM
profiles.
Finally,
version
4.5
incorporates
data
set
spanning
2605
viral
covering
5228
352
proteomes.
All
are
accessible
bulk
downloading,
as
web-service,
through
completely
redesigned
web
interface.
new
access
points
faster
searches
number
browsing
visualization
capabilities,
facilitating
needs
both
experts
less
experienced
users.
v4.5
available
http://eggnog.embl.de.
Nature Plants,
Год журнала:
2018,
Номер
4(7), С. 460 - 472
Опубликована: Июнь 29, 2018
Ferns
are
the
closest
sister
group
to
all
seed
plants,
yet
little
is
known
about
their
genomes
other
than
that
they
generally
colossal.
Here,
we
report
on
of
Azolla
filiculoides
and
Salvinia
cucullata
(Salviniales)
present
evidence
for
episodic
whole-genome
duplication
in
ferns-one
at
base
'core
leptosporangiates'
one
specific
Azolla.
One
fern-specific
gene
identified,
recently
shown
confer
high
insect
resistance,
seems
have
been
derived
from
bacteria
through
horizontal
transfer.
coexists
a
unique
symbiosis
with
N2-fixing
cyanobacteria,
demonstrate
clear
pattern
cospeciation
between
two
partners.
Furthermore,
genome
lacks
genes
common
arbuscular
mycorrhizal
root
nodule
symbioses,
identify
several
putative
transporter
Azolla-cyanobacterial
symbiosis.
These
genomic
resources
will
help
exploring
biotechnological
potential
address
fundamental
questions
evolution
plant
life.
Proceedings of the National Academy of Sciences,
Год журнала:
2016,
Номер
113(37)
Опубликована: Авг. 29, 2016
Significance
Mealybugs
are
plant
sap-sucking
insects
with
a
nested
symbiotic
arrangement,
where
one
bacterium
lives
inside
another
bacterium,
which
together
live
insect
cells.
These
two
bacteria,
along
genes
transferred
from
other
bacteria
to
the
genome,
allow
survive
on
its
nutrient-poor
diet.
Here,
we
show
that
innermost
in
this
symbiosis
was
replaced
several
times
over
evolutionary
history.
results
highly
integrated
and
interdependent
systems
can
experience
symbiont
replacement
suggest
similar
dynamics
could
have
occurred
building
mosaic
metabolic
pathways
seen
mitochondria
plastids.
