Journal of the American Chemical Society,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 27, 2025
Lysine
residue
represents
an
attractive
site
for
covalent
drug
development
due
to
its
high
abundance
(5.6%)
and
critical
functions.
However,
very
few
lysines
have
been
characterized
be
accessible
ligands
perturb
the
protein
functions,
owing
their
protonation
state
adjacent
steric
hindrance.
Herein,
we
report
a
new
lysine
bioconjugation
chemistry,
O-cyanobenzaldehyde
(CNBA),
that
enables
selective
modification
of
ε-amine
form
iso-indolinones
under
physiological
conditions.
Activity-based
proteome
profiling
enabled
mapping
3451
residues
85
endogenous
kinases
in
live
cells,
highlighting
potential
modifying
hyper-reactive
within
or
buried
catalytic
kinome.
Further
crystallography
mass
spectrometry
confirmed
K271_ABL1
K162_AURKA
are
covalently
targetable
sites
kinases.
Leveraging
structure-based
design,
incorporated
CNBA
into
core
structure
Nutlin-3
irreversibly
inhibit
MDM2-p53
interaction
by
targeting
exposed
K94
on
surface
murine
double
minute
2.
Importantly,
demonstrated
application
as
lysine-recognized
agent
developing
antibody-drug
conjugates.
The
results
collectively
validate
efficient
with
broad
applications
both
cells.
Journal of the American Chemical Society,
Journal Year:
2022,
Volume and Issue:
144(3), P. 1152 - 1157
Published: Jan. 18, 2022
We
report
a
new
reversible
lysine
conjugation
that
features
novel
diazaborine
product
and
much
slowed
dissociation
kinetics
in
comparison
to
the
previously
known
iminoboronate
chemistry.
Incorporating
diazaborine-forming
warhead
RMR1
peptide
ligand
gives
potent
long-acting
covalent
inhibitors
of
staphylococcal
sortase.
The
efficacy
sortase
inhibition
is
demonstrated
via
biochemical
cell-based
assays.
A
comparative
study
an
iminoboronate-forming
highlights
significance
potential
modulating
bond
achieving
inhibitors.
Journal of Medicinal Chemistry,
Journal Year:
2024,
Volume and Issue:
67(10), P. 7668 - 7758
Published: May 7, 2024
Covalent
inhibitors
and
other
types
of
covalent
modalities
have
seen
a
revival
in
the
past
two
decades,
with
variety
new
targeted
drugs
having
been
approved
recent
years.
A
key
feature
such
molecules
is
an
intrinsically
reactive
group,
typically
weak
electrophile,
which
enables
irreversible
or
reversible
formation
bond
specific
amino
acid
target
protein.
This
often
called
"warhead",
critical
determinant
ligand's
activity,
selectivity,
general
biological
properties.
In
2019,
we
summarized
emerging
re-emerging
warhead
chemistries
to
cysteine
acids
(Gehringer,
M.;
Laufer,
S.
A.
J.
Med.
Chem.
62,
5673−5724;
DOI:
10.1021/acs.jmedchem.8b01153).
Since
then,
field
has
rapidly
evolved.
Here
discuss
progress
on
warheads
made
since
our
last
Perspective
their
application
medicinal
chemistry
chemical
biology.
Molecules,
Journal Year:
2022,
Volume and Issue:
27(22), P. 7728 - 7728
Published: Nov. 10, 2022
Cysteine
is
one
of
the
least
abundant
amino
acids
in
proteins
many
organisms,
which
plays
a
crucial
role
catalysis,
signal
transduction,
and
redox
regulation
gene
expression.
The
thiol
group
cysteine
possesses
ability
to
perform
nucleophilic
redox-active
functions
that
are
not
feasible
for
other
natural
acids.
most
common
covalent
acid
residue
has
been
shown
react
with
variety
warheads,
especially
Michael
receptors.
These
unique
properties
have
led
widespread
interest
this
nucleophile,
leading
development
cysteine-targeting
warheads
different
chemical
compositions.
Herein,
we
summarized
various
targeting
their
application
drug
development.
Journal of the American Chemical Society,
Journal Year:
2022,
Volume and Issue:
144(34), P. 15885 - 15893
Published: Aug. 17, 2022
Binding
via
reversible
covalent
bond
formation
presents
a
novel
and
powerful
mechanism
to
enhance
the
potency
of
synthetic
inhibitors
for
therapeutically
important
proteins.
Work
on
this
front
has
yielded
anticancer
drug
bortezomib
as
well
antisickling
voxelotor.
However,
rational
design
remains
difficult
even
when
noncovalent
are
available
scaffold.
Herein,
we
report
chemically
modified
phage
libraries,
both
linear
cyclic,
that
incorporate
2-acetylphenylboronic
acid
(APBA)
warhead
bind
lysines
iminoboronate
formation.
To
demonstrate
their
utility,
these
APBA-presenting
libraries
were
screened
against
sortase
A
Staphylococcus
aureus,
spike
protein
SARS-CoV-2.
For
targets,
peptide
ligands
readily
identified
with
single-digit
micromolar
excellent
specificity,
enabling
live-cell
inhibition
highly
sensitive
detection,
respectively.
Furthermore,
our
structure-activity
studies
unambiguously
benefit
APBA
binding.
Overall,
contribution
shows
first
time
can
be
developed
display
interest.
The
platform
should
widely
applicable
proteins
including
those
involved
in
protein-protein
interactions.
Angewandte Chemie International Edition,
Journal Year:
2022,
Volume and Issue:
61(26)
Published: April 19, 2022
Despite
recent
interests
in
developing
lysine-targeting
covalent
inhibitors,
no
general
approach
is
available
to
create
such
compounds.
We
report
herein
a
develop
cell-active
inhibitors
of
protein
kinases
by
targeting
the
conserved
catalytic
lysine
residue
using
key
SuFEx
and
salicylaldehyde-based
imine
chemistries.
validated
strategy
successfully
(irreversible
reversible)
against
BCR-ABL
kinase.
Our
lead
compounds
showed
high
levels
selectivity
biochemical
assays,
exhibited
nanomolar
potency
endogenous
ABL
kinase
cellular
were
active
most
drug-resistant
mutations.
Among
them,
salicylaldehyde-containing
A5
first-ever
reversible
inhibitor
that
possessed
time-dependent
inhibition
with
prolonged
residence
time
few
off-targets
K562
cells.
Bioinformatics
further
suggested
generality
our
human
kinome.
Journal of the American Chemical Society,
Journal Year:
2023,
Volume and Issue:
145(7), P. 3844 - 3849
Published: Feb. 12, 2023
Lysine-targeting
irreversible
covalent
inhibitors
have
attracted
growing
interests
in
recent
years,
especially
the
fields
of
kinase
research.
Despite
encouraging
progress,
few
chemistries
are
available
to
develop
that
exclusively
lysine-targeting,
selective,
and
cell-active.
We
report
herein
a
2-ethynylbenzaldehyde
(EBA)-based,
lysine-targeting
strategy
generate
potent
selective
small-molecule
ABL
by
selectively
targeting
conserved
catalytic
lysine
enzyme.
showed
resulting
compounds
were
cell-active,
capable
covalently
engaging
endogenous
K562
cells
with
long-residence
time
off-targets.
further
validated
generality
this
developing
EBA-based
against
EGFR
(a
kinase)
Mcl-1
nonkinase)
reacted
noncatalytic
within
each
target.
MedComm – Oncology,
Journal Year:
2023,
Volume and Issue:
2(4)
Published: Oct. 31, 2023
Abstract
Covalent
inhibitors
have
been
a
rapidly
growing
field
in
drug
discovery
due
to
their
therapeutic
potential
and
unique
advantages
cancer
therapy.
As
opposed
noncovalent
inhibitory
drugs,
covalent
reversibly
or
irreversibly
modify
proximal
nucleophilic
amino
acid
residues
on
proteins,
aiming
selectively
recognize
bind
protein
targets
addressing
some
of
the
challenges
faced
by
drugs.
Most
successful
targeted
depend
primarily
binding‐site
cysteine
residues,
but
this
has
limitations
for
certain
that
lack
targetable
residues.
Recently,
rational
design
probes
targeting
other
such
as
lysine,
tyrosine,
serine,
turned
out
be
another
promising
strategy
Thus,
development
novel
strategies
extend
scope
binding
improve
properties
is
required.
This
review
gives
summary
noncysteine
from
different
aspects,
including
target
identification,
structure–activity
relationships,
strategies,
properties,
hope
providing
scientific
reference
future
means
expanding
research