The ISME Journal,
Journal Year:
2023,
Volume and Issue:
17(4), P. 588 - 599
Published: Jan. 31, 2023
Abstract
Ammonia
oxidation,
as
the
first
step
of
nitrification,
constitutes
a
critical
process
in
global
nitrogen
cycle.
However,
fundamental
knowledge
its
key
enzyme,
copper-dependent
ammonia
monooxygenase,
is
lacking,
particular
for
environmentally
abundant
ammonia-oxidizing
archaea
(AOA).
Here
structure
enzyme
investigated
by
blue-native
gel
electrophoresis
and
proteomics
from
native
membrane
complexes
two
AOA.
Besides
known
AmoABC
subunits
earlier
predicted
AmoX,
new
protein
subunits,
AmoY
AmoZ,
were
identified.
They
are
unique
to
AOA,
highly
conserved
co-regulated,
their
genes
linked
other
AMO
subunit
streamlined
AOA
genomes.
Modeling
in-gel
cross-link
approaches
support
an
overall
protomer
similar
distantly
related
bacterial
particulate
methane
monooxygenase
but
also
reveals
clear
differences
extracellular
domains
enzyme.
These
data
open
avenues
further
structure-function
studies
this
ecologically
important
nitrification
complex.
The ISME Journal,
Journal Year:
2020,
Volume and Issue:
14(10), P. 2595 - 2609
Published: July 7, 2020
Abstract
Ammonia-oxidizing
archaea
(AOA)
are
among
the
most
abundant
and
ubiquitous
microorganisms
in
ocean,
exerting
primary
control
on
nitrification
nitrogen
oxides
emission.
Although
united
by
a
common
physiology
of
chemoautotrophic
growth
ammonia,
corresponding
high
genomic
habitat
variability
suggests
tremendous
adaptive
capacity.
Here,
we
compared
44
diverse
AOA
genomes,
37
from
species
cultivated
samples
collected
across
geographic
locations
seven
assembled
metagenomic
sequences
mesopelagic
to
hadopelagic
zones
deep
ocean.
Comparative
analysis
identified
major
marine
genotypic
groups
having
gene
content
correlated
with
their
distinctive
biogeographies.
Phosphorus
ammonia
availabilities
as
well
hydrostatic
pressure
were
selective
forces
driving
different
oceanic
regions.
Notably,
methylphosphonate
biosynthetic
genes
span
provinces,
reinforcing
importance
for
methane
production
Together,
our
combined
comparative
physiological,
genomic,
analyses
provide
comprehensive
view
biogeography
globally
radiation
into
vast
range
terrestrial
habitats.
Environmental Science & Technology,
Journal Year:
2020,
Volume and Issue:
54(15), P. 9175 - 9190
Published: July 13, 2020
The
continuous
increase
of
nitrous
oxide
(N2O)
in
the
atmosphere
has
become
a
global
concern
because
its
property
as
potent
greenhouse
gas.
Given
important
role
ammonia-oxidizing
archaea
(AOA)
ammonia
oxidation
and
their
involvement
N2O
production,
clear
understanding
knowledge
on
archaeal
production
is
necessary
for
mitigation.
Compared
to
bacterial
by
bacteria
(AOB),
AOA-driven
pathways
are
less-well
elucidated.
In
this
Critical
Review,
we
synthesized
currently
proposed
combination
with
enzymology
distinction,
analyzed
AOA
species
involved
pathways,
discussed
relative
contribution
both
natural
anthropogenic
environments,
summarized
factors
affecting
yield,
compared
distinctions
among
approaches
used
differentiate
oxidizer-associated
production.
We,
then,
put
forward
perspectives
future
challenges
further
improve
our
putative
enzymes
potential
identification
order
potentially
achieve
effective
mitigations.
Microbes
dominate
terrestrial
ecosystems
via
their
great
species
diversity
and
vital
ecosystem
functions,
such
as
biogeochemical
cycling
mycorrhizal
symbiosis.
Fungi
other
organisms
form
diverse
association
networks.
However,
the
roles
of
belonging
to
different
kingdoms
in
multi-kingdom
community
networks
have
remained
largely
elusive.
In
light
integrative
microbiome
initiative,
we
inferred
multiple-kingdom
biotic
associations
from
high
elevation
timberline
soils
using
SPIEC-EASI
method.
Biotic
interactions
among
plants,
nematodes,
fungi,
bacteria,
archaea
were
surveyed
at
network
levels.
Compared
single-kingdom
networks,
increased
within-kingdom
cross-kingdom
edge
numbers
by
1012
10,772,
respectively,
well
mean
connectivity
negative
proportion
15.2
0.8%,
respectively.
Fungal
involvement
stability
(i.e.,
resistance
node
loss)
connectivity,
but
reduced
modularity,
when
compared
with
those
archaea.
entire
network,
fungal
nodes
characterized
significantly
higher
degree
betweenness
than
bacteria.
more
often
played
role
connector,
linking
modules.
Consistently,
structural
equation
modeling
multiple
regression
on
matrices
corroborated
"bridge"
fungi
level,
plants
soil
biota.
Overall,
our
findings
suggest
that
can
stabilize
self-organization
process
The
facilitate
initiation
carrying
out
studies
natural
reveal
complex
above-
belowground
linkages.
The ISME Journal,
Journal Year:
2023,
Volume and Issue:
17(4), P. 588 - 599
Published: Jan. 31, 2023
Abstract
Ammonia
oxidation,
as
the
first
step
of
nitrification,
constitutes
a
critical
process
in
global
nitrogen
cycle.
However,
fundamental
knowledge
its
key
enzyme,
copper-dependent
ammonia
monooxygenase,
is
lacking,
particular
for
environmentally
abundant
ammonia-oxidizing
archaea
(AOA).
Here
structure
enzyme
investigated
by
blue-native
gel
electrophoresis
and
proteomics
from
native
membrane
complexes
two
AOA.
Besides
known
AmoABC
subunits
earlier
predicted
AmoX,
new
protein
subunits,
AmoY
AmoZ,
were
identified.
They
are
unique
to
AOA,
highly
conserved
co-regulated,
their
genes
linked
other
AMO
subunit
streamlined
AOA
genomes.
Modeling
in-gel
cross-link
approaches
support
an
overall
protomer
similar
distantly
related
bacterial
particulate
methane
monooxygenase
but
also
reveals
clear
differences
extracellular
domains
enzyme.
These
data
open
avenues
further
structure-function
studies
this
ecologically
important
nitrification
complex.