ACS Chemical Biology,
Journal Year:
2012,
Volume and Issue:
7(9), P. 1477 - 1481
Published: July 30, 2012
The
importance
of
iron
in
living
systems
can
be
traced
to
the
many
complexes
within
which
it
is
found,
its
chemical
mobility
undergoing
oxidation-reduction
reactions,
and
abundance
Earth's
crust.
Iron
most
abundant
element,
by
mass,
Earth,
constituting
about
80%
inner
outer
cores
Earth.
molten
core
8000
km
diameter,
solid
2400
diameter.
fourth
element
It
chemically
functional
component
mononuclear
complexes,
dinuclear
[2Fe-2S]
[4Fe-4S]
clusters,
[Fe-Ni-S]
protophorphyrin
IX,
other
protein
biochemistry.
Metals
such
as
nickel,
cobalt,
copper,
manganese
are
present
crust
could
principle
function
place
iron,
but
they
scarce
plentiful
because
nuclear
stability
stellar
fusion
reactions.
seems
likely
that
planets,
formed
same
processes
would
also
foster
evolution
life
similarly
important
on
those
planets
Biochimica et Biophysica Acta (BBA) - General Subjects,
Journal Year:
2012,
Volume and Issue:
1830(5), P. 3217 - 3266
Published: Oct. 2, 2012
Glutathione-dependent
catalysis
is
a
metabolic
adaptation
to
chemical
challenges
encountered
by
all
life
forms.
In
the
course
of
evolution,
nature
optimized
numerous
mechanisms
use
glutathione
as
most
versatile
nucleophile
for
conversion
plethora
sulfur-,
oxygen-
or
carbon-containing
electrophilic
substances.This
comprehensive
review
summarizes
fundamental
principles
and
compares
structures
glutathione-dependent
enzymes,
including
reductase,
glutaredoxins,
peroxidases,
peroxiredoxins,
glyoxalases
1
2,
transferases
MAPEG.
Moreover,
open
mechanistic
questions,
evolutionary
aspects
physiological
relevance
are
discussed
each
enzyme
family.It
surprising
how
little
known
about
many
often
reaction
geometries
acid-base
catalysts
neglected,
puzzles
remain
unsolved
despite
almost
century
research.
On
one
hand,
several
families
with
non-related
protein
folds
recognize
moiety
their
substrates.
other
thioredoxin
fold
used
catalysis.
Ancient
well
recent
structural
changes
this
did
not
only
significantly
alter
mechanism,
but
also
resulted
in
completely
different
functions.Glutathione-dependent
enzymes
excellent
study
objects
structure-function
relationships
molecular
evolution.
Notably,
times
systems
biology,
outcome
models
on
metabolism
redox
regulation
more
than
questionable
long
properties
neither
studied
nor
understood.
Furthermore,
presented
could
have
implications
drug
development.
This
article
part
Special
Issue
entitled
Cellular
functions
glutathione.
Nucleic Acids Research,
Journal Year:
2015,
Volume and Issue:
43(4), P. 2466 - 2485
Published: Jan. 27, 2015
Nucleotides
are
required
for
a
wide
variety
of
biological
processes
and
constantly
synthesized
de
novo
in
all
cells.
When
cells
proliferate,
increased
nucleotide
synthesis
is
necessary
DNA
replication
RNA
production
to
support
protein
at
different
stages
the
cell
cycle,
during
which
these
events
regulated
multiple
levels.
Therefore
precursor
nucleotides
also
strongly
Nucleotide
an
energy
intensive
process
that
uses
metabolic
pathways
across
compartments
several
sources
carbon
nitrogen.
The
transcription
level
by
set
master
factors
but
enzyme
allosteric
regulation
feedback
inhibition.
Here
we
review
cellular
demands
biosynthesis,
their
mechanisms
cycle.
use
stable
isotope
tracers
delineating
biosynthetic
routes
intersecting
how
quantitatively
controlled
under
conditions
highlighted.
Moreover,
importance
viability
discussed
this
may
lead
potential
new
approaches
drug
development
diseases
such
as
cancer.
Critical Reviews in Biochemistry and Molecular Biology,
Journal Year:
2008,
Volume and Issue:
43(1), P. 63 - 88
Published: Jan. 1, 2008
The
radical
S-adenosylmethionine
(SAM)
superfamily
currently
comprises
more
than
2800
proteins
with
the
amino
acid
sequence
motif
CxxxCxxC
unaccompanied
by
a
fourth
conserved
cysteine.
charcteristic
three-cysteine
nucleates
[4Fe–4S]
cluster,
which
binds
SAM
as
ligand
to
unique
Fe
not
ligated
cysteine
residue.
members
participate
in
40
distinct
biochemical
transformations,
and
most
have
been
biochemically
characterized.
A
handful
of
this
purified
at
least
partially
Significant
mechanistic
structural
information
is
available
for
lysine
2,3-aminomutase,
pyruvate
formate-lyase,
coproporphyrinogen
III
oxidase,
MoaA
required
molybdopterin
biosynthesis.
Biochemical
spore
photoproduct
lyase,
anaerobic
ribonucleotide
reductase
activation
subunit,
lipoyl
synthase,
MiaB
involved
methylthiolation
isopentenyladenine-37
tRNA.
enzymes
characterized
date
common
cleavage
[4Fe–4S]1
+
–SAM
complex
[4Fe–4S]2
+–Met
5′
-deoxyadenosyl
radical,
abstracts
hydrogen
atom
from
substrate
initiate
mechanism.