PTEX component HSP101 mediates export of diverse malaria effectors into host erythrocytes.
PTEX component HSP101 mediates export of diverse malaria effectors into host erythrocytes.
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DOI:
10.1038/nature13574
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发表时间:
2014-07-31
期刊:
影响因子:
64.8
通讯作者:
Goldberg, Daniel E.
中科院分区:
文献类型:
--
作者:
Beck, Josh R.;Muralidharan, Vasant;Oksman, Anna;Goldberg, Daniel E.
To mediate its survival and virulence, the malaria parasitePlasmodium falciparumexports hundreds of proteins into the host erythrocyte. To enter the host cell, exported proteins must cross the parasitophorous vacuolar membrane (PVM) within which the parasite resides, but the mechanism remains unclear. A putativePlasmodiumtranslocon of exported proteins (PTEX) has been suggested to be involved for at least one class of exported proteins; however, direct functional evidence for this has been elusive,,. Here we show that export across the PVM requires heat shock protein 101 (HSP101), a ClpB-like AAA+ ATPase component of PTEX. Using a chaperone auto-inhibition strategy, we achieved rapid, reversible ablation of HSP101 function, resulting in a nearly complete block in export with substrates accumulating in the vacuole in both asexual and sexual parasites. Surprisingly, this block extended to all classes of exported proteins, revealing HSP101-dependent translocation across the PVM as a convergent step in the multi-pathway export process. Under export-blocked conditions, association between HSP101 and other components of the PTEX complex was lost, indicating that the integrity of the complex is required for efficient protein export. Our results demonstrate an essential and universal role for HSP101 in protein export and provide strong evidence for PTEX function in protein translocation into the host cell.
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影响因子:
6.7
作者:
Heiber A;Kruse F;Pick C;Grüring C;Flemming S;Oberli A;Schoeler H;Retzlaff S;Mesén-Ramírez P;Hiss JA;Kadekoppala M;Hecht L;Holder AA;Gilberger TW;Spielmann T
通讯作者:
Spielmann T
影响因子:
--
作者:
Morahan, Belinda J.;Strobel, Carolyn;Williamson, Kim C.
通讯作者:
Williamson, Kim C.
影响因子:
64.8
作者:
de Koning-Ward, Tania F.;Gilson, Paul R.;Boddey, Justin A.;Rug, Melanie;Smith, Brian J.;Papenfuss, Anthony T.;Sanders, Paul R.;Lundie, Rachel J.;Maier, Alexander G.;Cowman, Alan F.;Crabb, Brendan S.
通讯作者:
Crabb, Brendan S.
影响因子:
4.8
作者:
Liu, J;Gluzman, IY;Goldberg, DE
通讯作者:
Goldberg, DE
DOI:
10.1073/pnas.0504679102
发表时间:
2005-11-08
影响因子:
11.1
作者:
Balu, B;Shoue, DA;Adams, JH
通讯作者:
Adams, JH