bioRxiv (Cold Spring Harbor Laboratory),
Год журнала:
2024,
Номер
unknown
Опубликована: Апрель 4, 2024
Abstract
PARP15
is
a
mono-ADP-ribosyltransferase
with
unknown
functions.
Its
evolutionary
relationship
PARP14
suggests
roles
in
antiviral
defense;
its
ability
to
modify
RNA
and
localization
stress
granules
point
functions
the
regulation
of
translation.
also
modifies
itself
other
proteins
using
ADP-ribosyltransferase
(ART)
domain
contains
two
macrodomains
predicted
bind
ADP-ribosyl
on
targets.
We
used
biochemical
biophysical
analysis
study
how
activity
regulated.
Here
we
show
that
catalytic
dimerizes
mid-nanomolar
affinity,
forming
same
dimer
interface
solution
had
already
been
captured
by
X-ray
crystallography
domain.
Furthermore,
formation
dimers
prerequisite
for
monomeric
mutant
variants
were
catalytically
inactive.
Our
findings
suggest
regulatory
mechanism
which
dimerization
linked
either
target
engagement
or
placement
residue,
rather
than
NAD+
co-substrate
binding,
protomers
operate
independent
one
another.
Together,
our
results
uncover
novel
PARP
family
enzyme,
might
inspire
new
avenues
pharmacological
intervention.
Cell,
Год журнала:
2023,
Номер
186(21), С. 4475 - 4495
Опубликована: Окт. 1, 2023
ADP-ribosylation
is
a
ubiquitous
modification
of
biomolecules,
including
proteins
and
nucleic
acids,
that
regulates
various
cellular
functions
in
all
kingdoms
life.
The
recent
emergence
new
technologies
to
study
has
reshaped
our
understanding
the
molecular
mechanisms
govern
establishment,
removal,
recognition
this
modification,
as
well
its
impact
on
organismal
function.
These
advances
have
also
revealed
intricate
involvement
human
physiology
pathology
enormous
potential
their
manipulation
holds
for
therapy.
In
review,
we
present
state-of-the-art
findings
covering
work
structural
biology,
biochemistry,
cell
clinical
aspects
ADP-ribosylation.
Journal of Biological Chemistry,
Год журнала:
2023,
Номер
299(9), С. 105096 - 105096
Опубликована: Июль 26, 2023
PARP14/BAL2
is
a
large
multidomain
enzyme
involved
in
signaling
pathways
with
relevance
to
cancer,
inflammation,
and
infection.
Inhibition
of
its
mono-ADP-ribosylating
PARP
homology
domain
three
ADP-ribosyl
binding
macro
domains
has
been
regarded
as
potential
means
therapeutic
intervention.
Macrodomains-2
-3
are
known
stably
bind
ADP-ribosylated
target
proteins,
but
the
function
macrodomain-1
remained
somewhat
elusive.
Here,
we
used
biochemical
assays
ADP-ribosylation
levels
characterize
PARP14
homologous
PARP9.
Our
results
show
that
both
macrodomains
display
an
glycohydrolase
activity
not
directed
toward
specific
protein
side
chains.
unable
degrade
poly(ADP-ribose),
enzymatic
product
PARP1.
The
F926A
mutation
F244A
PARP9
strongly
reduced
respective
macrodomains,
suggesting
mechanistic
Mac1
SARS-CoV-2
Nsp3
protein.
This
study
adds
two
new
enzymes
previously
six
human
glycohydrolases.
have
key
implications
for
how
will
be
studied
their
functions
understood.
Nucleic Acids Research,
Год журнала:
2023,
Номер
52(2), С. 801 - 815
Опубликована: Ноя. 24, 2023
Abstract
Although
ubiquitylation
had
traditionally
been
considered
limited
to
proteins,
the
discovery
of
non-proteinaceous
substrates
(e.g.
lipopolysaccharides
and
adenosine
diphosphate
ribose
(ADPr))
challenged
this
perspective.
Our
recent
study
showed
that
DTX2
E3
ligase
efficiently
ubiquitylates
ADPr.
Here,
we
show
ADPr
activity
is
also
present
in
another
DELTEX
family
member,
DTX3L,
analysed
both
as
an
isolated
catalytic
fragment
full-length
PARP9:DTX3L
complex,
suggesting
it
a
general
feature
family.
Since
structural
predictions
DTX3L
possesses
single-stranded
nucleic
acids
binding
ability
given
fact
have
recently
emerged
for
ADP-ribosylation,
asked
whether
E3s
might
catalyse
moiety
linked
acids.
Indeed,
are
capable
ubiquitylating
ADP-ribosylated
DNA
RNA
synthesized
by
PARPs,
including
PARP14.
Furthermore,
demonstrate
Ub-ADPr-nucleic
conjugate
can
be
reversed
two
groups
hydrolases,
which
remove
either
whole
adduct
SARS-CoV-2
Mac1
or
PARP14
macrodomain
1)
just
Ub
PLpro).
Overall,
reveals
function
presents
evidence
reversible
Abstract
Protein
post‐translational
modifications
(PTMs)
play
a
crucial
role
in
all
cellular
functions
by
regulating
protein
activity,
interactions
and
half‐life.
Despite
the
enormous
diversity
of
modifications,
various
PTM
systems
show
parallels
their
chemical
catalytic
underpinnings.
Here,
focussing
on
that
involve
addition
new
elements
to
amino‐acid
sidechains,
I
describe
historical
milestones
fundamental
concepts
support
current
understanding
PTMs.
The
survey
covers
selected
key
research
programmes,
including
study
phosphorylation
as
regulatory
switch,
ubiquitylation
degradation
signal
histone
functional
code.
contribution
techniques
for
studying
PTMs
is
also
discussed.
central
part
essay
explores
shared
principles
strategies
observed
across
diverse
systems,
together
with
mechanisms
substrate
selection,
reversibility
erasers
recognition
reader
domains.
Similarities
basic
mechanism
are
highlighted
implications
final
dedicated
evolutionary
trajectories
beginning
possible
emergence
context
rivalry
prokaryotic
world.
Together,
provides
unified
perspective
world
major
modifications.
bioRxiv (Cold Spring Harbor Laboratory),
Год журнала:
2024,
Номер
unknown
Опубликована: Янв. 4, 2024
All
coronaviruses
(CoVs)
encode
for
a
conserved
macrodomain
(Mac1)
located
in
nonstructural
protein
3
(nsp3).
Mac1
is
an
ADP-ribosylhydrolase
that
binds
and
hydrolyzes
mono-ADP-ribose
from
target
proteins.
Previous
work
has
shown
important
virus
replication
pathogenesis.
Within
Mac1,
there
are
several
regions
highly
across
CoVs,
including
the
GIF
(glycine-isoleucine-phenylalanine)
motif.
To
determine
how
biochemical
activities
of
these
residues
impact
CoV
replication,
isoleucine
phenylalanine
were
mutated
to
alanine
(I-A/F-A)
both
recombinant
proteins
murine
hepatitis
(MHV),
Middle
East
respiratory
syndrome
coronavirus
(MERS-CoV),
severe
acute
2
(SARS-CoV-2).
The
F-A
mutant
had
ADP-ribose
binding
and/or
hydrolysis
defects
led
attenuated
pathogenesis
cell
culture
mice.
In
contrast,
I-A
mutations
normal
enzyme
activity
enhanced
binding.
Despite
increased
binding,
MERS-CoV
SARS-CoV-2
mice,
indicating
this
residue
acts
as
gate
controls
efficient
replication.
These
results
highlight
function
provide
unique
insight
into
macrodomains
control
promote
viral
bioRxiv (Cold Spring Harbor Laboratory),
Год журнала:
2024,
Номер
unknown
Опубликована: Апрель 26, 2024
ABSTRACT
PARP14
is
a
203
kDa
multi-domain
protein
that
primarily
known
as
an
ADP-ribosyltransferase,
and
involved
in
variety
of
cellular
functions
including
DNA
damage,
microglial
activation,
inflammation,
cancer
progression.
In
addition,
upregulated
by
interferon
(IFN),
indicating
role
the
antiviral
response.
Furthermore,
has
evolved
under
positive
selection,
again
it
host-pathogen
conflict.
We
found
required
for
increased
IFN-I
production
response
to
coronavirus
infection
lacking
ADP-ribosylhydrolase
(ARH)
activity
poly(I:C),
however,
whether
direct
function
remains
unclear.
Here
we
demonstrate
catalytic
enhances
IFN-III
responses
restricts
ARH-deficient
murine
hepatitis
virus
(MHV)
severe
acute
respiratory
syndrome
2
(SARS-CoV-2)
replication.
To
determine
if
PARP14’s
extended
beyond
CoVs,
tested
ability
herpes
simplex
1
(HSV-1)
several
negative-sense
RNA
viruses,
vesicular
stomatitis
(VSV),
Ebola
(EBOV),
Nipah
(NiV),
infect
A549
knockout
(KO)
cells.
HSV-1
had
replication
KO
cells,
contrast,
was
critical
efficient
VSV,
EBOV,
NiV,
with
EBOV
infectivity
at
less
than
1%
WT
A
active
site
inhibitor
no
impact
on
or
infection,
its
effect
these
viruses
independent
activity.
These
data
promotes
IFN
both
pro–
anti-viral
targeting
multiple
viruses.
IMPORTANCE
The
largely
regulated
post-translation
modifications
(PTM),
ADP-ribosylation.
ADP-ribosyltransferase
However,
been
described
PARP14.
Here,
represses
replication,
demonstrating
functions.
Surprisingly,
also
pro-viral
functions,
which
have
high
mortality
are
pandemic
potential.
indicate
potential
therapeutic
target
highly
pathogenic
Toxins,
Год журнала:
2024,
Номер
16(5), С. 208 - 208
Опубликована: Апрель 28, 2024
Recent
discoveries
establish
DNA
and
RNA
as
bona
fide
substrates
for
ADP-ribosylation.
NADAR
(“NAD-
ADP-ribose”-associated)
enzymes
reverse
guanine
ADP-ribosylation
serve
antitoxins
in
the
DarT-NADAR
operon.
Although
NADARs
are
widespread
across
prokaryotes,
eukaryotes,
viruses,
their
specificity
broader
physiological
roles
remain
poorly
understood.
Using
phylogenetic
biochemical
analyses,
we
further
explore
de-ADP-ribosylation
activity
antitoxin
functions
of
domains.
We
demonstrate
that
different
subfamilies
proteins
from
representative
E.
coli
strains
an
coli-infecting
phage
retain
while
displaying
providing
protection
toxic
cells.
Furthermore,
identify
a
myxobacterial
enzyme
within
YbiA
subfamily
its
associated
DarT-unrelated
ART
toxin,
which
termed
YarT,
thus
presenting
hitherto
uncharacterised
ART-YbiA
toxin–antitoxin
pair.
Our
studies
contribute
to
burgeoning
field
ADP-ribosylation,
supporting
relevance
beyond
bacterial
systems.
Notably,
confinement
non-mammals
infer
potential
highly
specific
targets
antimicrobial
drugs
with
minimal
off-target
effects.