Architecture of the major component of the type III secretion system export apparatus.
Architecture of the major component of the type III secretion system export apparatus.
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DOI:
10.1038/nsmb.2452
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发表时间:
2013-01
影响因子:
16.8
通讯作者:
Lea, Susan M.
中科院分区:
文献类型:
--
作者:
Abrusci, Patrizia;Vergara-Irigaray, Marta;Johnson, Steven;Beeby, Morgan D.;Hendrixson, David R.;Roversi, Pietro;Friede, Miriam E.;Deane, Janet E.;Jensen, Grant J.;Tang, Christoph M.;Lea, Susan M.
Type III secretion systems (T3SSs) are bacterial membrane-embedded secretion nanomachines designed to export specifically targeted sets of proteins from the bacterial cytoplasm. Secretion through T3SS is governed by a subset of inner membrane proteins termed the ‘export apparatus’. We show that a key member of the Shigella flexneri export apparatus, MxiA, assembles into a ring essential for secretion in vivo. The ring forming interfaces are well conserved in both non-flagellar and flagellar homologues, implying that the ring is an evolutionary conserved feature in these systems. Electron cryo-tomography reveals a T3SS-associated cytoplasmic torus of size and shape corresponding to the MxiA ring aligned to the secretion channel located between the secretion pore and the ATPase complex. This defines the molecular architecture of the dominant component of the export apparatus and allows us to propose a model for the molecular mechanisms controlling secretion.
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影响因子:
64.8
作者:
通讯作者:
--
DOI:
10.1107/s0907444904016427
发表时间:
2004-12-01
影响因子:
2.2
作者:
Blanc, E;Roversi, P;Bricogne, G
通讯作者:
Bricogne, G
影响因子:
3.6
作者:
Blocker, A;Jouihri, N;Allaoui, A
通讯作者:
Allaoui, A
影响因子:
3.6
作者:
Hendrixson, DR;DiRita, VJ
通讯作者:
DiRita, VJ
影响因子:
3.7
作者:
Hara N;Namba K;Minamino T
通讯作者:
Minamino T