Dissecting the Functional Contributions of the Intrinsically Disordered C-terminal Tail of Bacillus subtilis FtsZ.
Dissecting the Functional Contributions of the Intrinsically Disordered C-terminal Tail of Bacillus subtilis FtsZ.
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解剖枯草芽孢杆菌FTSZ的本质无序的C末端尾巴的功能贡献。
DOI:
10.1016/j.jmb.2020.03.008
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发表时间:
2020-05-01
影响因子:
5.6
通讯作者:
Pappu RV
中科院分区:
文献类型:
--
作者:
Cohan MC;Eddelbuettel AMP;Levin PA;Pappu RV
FtsZ is a bacterial GTPase that is central to the spatial and temporal control of cell division. It is a filament-forming enzyme that encompasses a well-folded core domain and a disordered C-terminal tail (CTT). The CTT is essential for ensuring proper assembly of the cytokinetic ring and its deletion leads to mis-localization of FtsZ, aberrant assembly, and cell death. In this work, we dissect the contributions of modules within the disordered CTT to assembly and enzymatic activity of B. subtilis FtsZ (Bs-FtsZ). The CTT features a hypervariable C-terminal linker (CTL) and a conserved C-terminal peptide (CTP). Our in vitro studies show that the CTL weakens the driving forces for forming single-stranded active polymers and suppresses lateral associations of these polymers whereas the CTP promotes the formation of alternative assemblies. Accordingly, in full-length Bs-FtsZ the CTL acts as a spacer that spatially separates the CTP sticker from the core thus ensuring filament formation through core-driven polymerization and lateral associations through CTP-mediated interactions. We also find that the CTL weakens GTP binding while enhancing the catalytic rate whereas the CTP has opposite effects. The joint contributions of the CTL and CTP make Bs-FtsZ an enzyme that is only half as efficient as a truncated version that lacks the CTT. Overall, our data suggest that the CTT acts as an auto-regulator of Bs-FtsZ assembly and as an auto-inhibitor enzymatic activity. Based on our results, we propose hypotheses regarding the hypervariability of CTLs and compare FtsZs to other bacterial proteins with tethered IDRs.
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影响因子:
3.6
作者:
Buske PJ;Levin PA
通讯作者:
Levin PA
影响因子:
4.4
作者:
Chen, JW;Romero, P;Dunker, AK
通讯作者:
Dunker, AK
影响因子:
3.6
作者:
Aarsman, MEG;Piette, A;den Blaauwen, T
通讯作者:
den Blaauwen, T
影响因子:
4.3
作者:
Choi, Jeong-Mo;Dar, Furqan;Pappu, Rohit, V
通讯作者:
Pappu, Rohit, V
影响因子:
3.2
作者:
Anderson, DE;Gueiros-Filho, FJ;Erickson, HP
通讯作者:
Erickson, HP