ジャーナル: mBio / 年: 2019 タイトル: Morphological Plasticity in a Sulfur-Oxidizing Marine Bacterium from the SUP05 Clade Enhances Dark Carbon Fixation. 著者: Vega Shah / Xiaowei Zhao / Rachel A Lundeen / Anitra E Ingalls / Daniela Nicastro / Robert M Morris / 要旨: Sulfur-oxidizing bacteria from the SUP05 clade are abundant in anoxic and oxygenated marine waters that appear to lack reduced sources of sulfur for cell growth. This raises questions about how these ...Sulfur-oxidizing bacteria from the SUP05 clade are abundant in anoxic and oxygenated marine waters that appear to lack reduced sources of sulfur for cell growth. This raises questions about how these chemosynthetic bacteria survive across oxygen and sulfur gradients and how their mode of survival impacts the environment. Here, we use growth experiments, proteomics, and cryo-electron tomography to show that a SUP05 isolate, " Thioglobus autotrophicus," is amorphous in shape and several times larger and stores considerably more intracellular sulfur when it respires oxygen. We also show that these cells can use diverse sources of reduced organic and inorganic sulfur at submicromolar concentrations. Enhanced cell size, carbon content, and metabolic activity of the aerobic phenotype are likely facilitated by a stabilizing surface-layer (S-layer) and an uncharacterized form of FtsZ-less cell division that supports morphological plasticity. The additional sulfur storage provides an energy source that allows cells to continue metabolic activity when exogenous sulfur sources are not available. This metabolic flexibility leads to the production of more organic carbon in the ocean than is estimated based solely on their anaerobic phenotype. Identifying shifts in microbial metabolism across redox gradients will improve efforts to model marine oxygen minimum zone (OMZ) ecosystems. Here, we show that aerobic morphology and metabolism increase cell size, sulfur storage capacity, and carbon fixation rates in " Thioglobus autotrophicus," a chemosynthetic bacterium from the SUP05 clade that crosses oxic-anoxic boundaries.
ダウンロード / ファイル: emd_0511.map.gz / 形式: CCP4 / 大きさ: 1.1 GB / タイプ: IMAGE STORED AS SIGNED BYTE
注釈
Marine bacteria T. autotrophicus; tomogram was binned
ボクセルのサイズ
X=Y=Z: 5.5 Å
密度
最小 - 最大
-128 - 127
平均 (標準偏差)
-7.9906993 (±30.657303)
対称性
空間群: 1
詳細
EMDB XML:
マップ形状
Axis order
X
Y
Z
Origin
-595
-63
534
サイズ
1432
1604
532
Spacing
1604
1432
532
セル
A: 8822.0 Å / B: 7876.0 Å / C: 2926.0 Å α=β=γ: 90.0 °
CCP4マップ ヘッダ情報:
mode
envelope stored as signed bytes (from -128 lowest to 127 highest)
Å/pix. X/Y/Z
5.5
5.5
5.5
M x/y/z
1604
1432
532
origin x/y/z
0.000
0.000
0.000
length x/y/z
8822.000
7876.000
2926.000
α/β/γ
90.000
90.000
90.000
MAP C/R/S
1
2
3
start NC/NR/NS
-63
-595
534
NC/NR/NS
1604
1432
532
D min/max/mean
-128.000
127.000
-7.991
-
添付データ
-
試料の構成要素
-
全体 : Thioglobus autotrophicus, EF1 strain, cultured under aerobic cond...
全体
名称: Thioglobus autotrophicus, EF1 strain, cultured under aerobic condition, repleted with a sulfur source.
要素
細胞: Thioglobus autotrophicus, EF1 strain, cultured under aerobic condition, repleted with a sulfur source.
複合体: PilQ
-
超分子 #1: Thioglobus autotrophicus, EF1 strain, cultured under aerobic cond...
超分子
名称: Thioglobus autotrophicus, EF1 strain, cultured under aerobic condition, repleted with a sulfur source. タイプ: cell / ID: 1 / 親要素: 0 詳細: Cells grow to a large size and storage multiple sulfur globules.