Abstract
With
the
emergence
of
widespread
antibiotic
resistance,
phages
are
an
appealing
alternative
to
antibiotics
in
fight
against
multidrug-resistant
bacteria.
Over
past
few
years,
many
have
been
isolated
from
various
environments
treat
bacterial
pathogens.
While
isolating
novel
for
treatment
has
had
some
success
compassionate
use,
developing
into
a
general
therapeutic
will
require
considerable
time
and
financial
resource
investments.
These
investments
may
be
less
significant
well-established
phage
model
systems.
The
knowledge
acquired
decades
research
on
their
structure,
life
cycle,
evolution
ensures
safe
application
efficient
handling.
However,
one
major
downside
established
systems
is
inability
infect
pathogenic
This
problem
not
insurmountable;
host
range
can
extended
through
genetic
engineering
or
experiments.
In
future,
breeding
pathogens
could
provide
new
avenue
develop
agents.
Nature Biotechnology,
Год журнала:
2020,
Номер
39(5), С. 578 - 585
Опубликована: Дек. 21, 2020
Abstract
Millions
of
new
viral
sequences
have
been
identified
from
metagenomes,
but
the
quality
and
completeness
these
vary
considerably.
Here
we
present
CheckV,
an
automated
pipeline
for
identifying
closed
genomes,
estimating
genome
fragments
removing
flanking
host
regions
integrated
proviruses.
CheckV
estimates
by
comparing
with
a
large
database
complete
including
76,262
systematic
search
publicly
available
metatranscriptomes
metaviromes.
After
validation
on
mock
datasets
comparison
to
existing
methods,
applied
diverse
collections
metagenome-assembled
sequences,
IMG/VR
Global
Ocean
Virome.
This
revealed
44,652
high-quality
genomes
(that
is,
>90%
complete),
although
vast
majority
were
small
fragments,
which
highlights
challenge
assembling
short-read
metagenomes.
Additionally,
found
that
removal
contamination
substantially
improved
accurate
identification
auxiliary
metabolic
genes
interpretation
viral-encoded
functions.
Viruses
are
a
significant
player
in
many
biosphere
and
human
ecosystems,
but
most
signals
remain
"hidden"
metagenomic/metatranscriptomic
sequence
datasets
due
to
the
lack
of
universal
gene
markers,
database
representatives,
insufficiently
advanced
identification
tools.Here,
we
introduce
VirSorter2,
DNA
RNA
virus
tool
that
leverages
genome-informed
advances
across
collection
customized
automatic
classifiers
improve
accuracy
range
detection.
When
benchmarked
against
genomes
from
both
isolated
uncultivated
viruses,
VirSorter2
uniquely
performed
consistently
with
high
(F1-score
>
0.8)
viral
diversity,
while
all
other
tools
under-detected
viruses
outside
group
represented
reference
databases
(i.e.,
those
order
Caudovirales).
Among
evaluated,
was
also
able
minimize
errors
associated
atypical
cellular
sequences
including
eukaryotic
plasmids.
Finally,
as
virosphere
exploration
unravels
novel
sequences,
VirSorter2's
modular
design
makes
it
inherently
expand
new
types
via
maintain
maximal
sensitivity
specificity.With
multi-classifier
design,
demonstrates
higher
overall
major
groups
will
advance
our
knowledge
evolution,
virus-microbe
interaction
various
ecosystems.
Source
code
is
freely
available
(
https://bitbucket.org/MAVERICLab/virsorter2
),
on
bioconda
an
iVirus
app
CyVerse
https://de.cyverse.org/de
).
Video
abstract.
Microbiology and Molecular Biology Reviews,
Год журнала:
2020,
Номер
84(2)
Опубликована: Март 3, 2020
Viruses
and
mobile
genetic
elements
are
molecular
parasites
or
symbionts
that
coevolve
with
nearly
all
forms
of
cellular
life.
The
route
virus
replication
protein
expression
is
determined
by
the
viral
genome
type.
Comparison
these
routes
led
to
classification
viruses
into
seven
“Baltimore
classes”
(BCs)
define
major
features
reproduction.
However,
recent
phylogenomic
studies
identified
multiple
evolutionary
connections
among
within
each
BCs
as
well
between
different
classes.
Proceedings of the National Academy of Sciences,
Год журнала:
2021,
Номер
118(23)
Опубликована: Июнь 3, 2021
Significance
Mechanisms
of
many
human
chronic
diseases
involve
abnormal
action
the
immune
system
and/or
altered
metabolism.
The
microbiome,
an
important
regulator
metabolic
and
immune-related
phenotypes,
has
been
shown
to
be
associated
with
or
participate
in
development
a
variety
diseases.
Viruses
bacteria
(i.e.,
“phages”)
are
ubiquitous
mysterious,
several
studies
have
that
phages
exert
great
control
over
behavior—and
misbehavior—of
their
host
bacteria.
This
study
uses
techniques
discover
analyze
45,000
viruses
bodies.
abundance
2,000
specific
is
found
correlate
common
PeerJ,
Год журнала:
2021,
Номер
9, С. e11396 - e11396
Опубликована: Май 6, 2021
Bacteriophages
are
broadly
classified
into
two
distinct
lifestyles:
temperate
and
virulent.
Temperate
phages
capable
of
a
latent
phase
infection
within
host
cell
(lysogenic
cycle),
whereas
virulent
directly
replicate
lyse
cells
upon
(lytic
cycle).
Accurate
lifestyle
identification
is
critical
for
determining
the
role
individual
phage
species
ecosystems
their
effect
on
evolution.
Here,
we
present
BACPHLIP,
BACterioPHage
LIfestyle
Predictor.
BACPHLIP
detects
presence
set
conserved
protein
domains
an
input
genome
uses
this
data
to
predict
via
Random
Forest
classifier
that
was
trained
dataset
634
genomes.
On
independent
test
423
phages,
has
accuracy
98%
greatly
exceeding
previously
existing
tools
(79%).
freely
available
GitHub
(
https://github.com/adamhockenberry/bacphlip
)
code
used
build
provided
in
separate
repository
https://github.com/adamhockenberry/bacphlip-model-dev
users
wishing
interrogate
re-train
underlying
classification
model.
Abstract
Viruses,
despite
their
great
abundance
and
significance
in
biological
systems,
remain
largely
mysterious.
Indeed,
the
vast
majority
of
perhaps
hundreds
millions
viral
species
on
planet
undiscovered.
Additionally,
many
viruses
deposited
central
databases
like
GenBank
RefSeq
are
littered
with
genes
annotated
as
‘hypothetical
protein’
or
equivalent.
Cenote-Taker
2,
a
virus
discovery
annotation
tool
available
command
line
graphical
user
interface
free
high-performance
computation
access,
utilizes
highly
sensitive
models
hallmark
to
discover
familiar
divergent
sequences
from
user-input
contigs.
2
uses
flexible
set
modules
automatically
annotate
sequence
features
contigs,
providing
more
gene
information
than
comparable
tools.
The
outputs
include
readable
interactive
genome
maps,
virome
summary
tables,
files
that
can
be
directly
submitted
GenBank.
We
expect
facilitate
discovery,
annotation,
expansion
known
virome.
Cell Host & Microbe,
Год журнала:
2021,
Номер
29(8), С. 1305 - 1315.e6
Опубликована: Июль 27, 2021
Anelloviruses
are
a
ubiquitous
component
of
healthy
human
viromes
and
remain
highly
prevalent
after
being
acquired
early
in
life.
The
full
extent
"anellome"
diversity
its
evolutionary
dynamics
unexplored.
We
employed
in-depth
sequencing
blood-transfusion
donor(s)-recipient
pairs
coupled
with
public
genomic
resources
for
large-scale
assembly
anellovirus
genomes
used
the
data
to
characterize
global
personal
through
time.
breadth
anellome
is
much
greater
than
previously
appreciated,
individuals
harbor
unique
anellomes
transmit
lineages
that
can
persist
several
months
within
diverse
milieu
endemic
host
lineages.
Anellovirus
sequence
shaped
by
extensive
recombination
at
all
levels
divergence,
hindering
traditional
phylogenetic
analyses.
Our
findings
illuminate
transmission
vast
anelloviruses
set
foundation
future
studies
their
biology.