Molecular snapshots of the Pex1/6 AAA+ complex in action.
Molecular snapshots of the Pex1/6 AAA+ complex in action.
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DOI:
10.1038/ncomms8331
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发表时间:
2015-06-12
影响因子:
16.6
通讯作者:
Wendler, Petra
中科院分区:
文献类型:
--
作者:
Ciniawsky, Susanne;Grimm, Immanuel;Saffian, Delia;Girzalsky, Wolfgang;Erdmann, Ralf;Wendler, Petra
The peroxisomal proteins Pex1 and Pex6 form a heterohexameric type II AAA+ ATPase complex, which fuels essential protein transport across peroxisomal membranes. Mutations in either ATPase in humans can lead to severe peroxisomal disorders and early death. We present an extensive structural and biochemical analysis of the yeast Pex1/6 complex. The heterohexamer forms a trimer of Pex1/6 dimers with a triangular geometry that is atypical for AAA+ complexes. While the C-terminal nucleotide-binding domains (D2) of Pex6 constitute the main ATPase activity of the complex, both D2 harbour essential substrate-binding motifs. ATP hydrolysis results in a pumping motion of the complex, suggesting that Pex1/6 function involves substrate translocation through its central channel. Mutation of the Walker B motif in one D2 domain leads to ATP hydrolysis in the neighbouring domain, giving structural insights into inter-domain communication of these unique heterohexameric AAA+ assemblies. Pex1 and Pex6 form a heterohexameric AAA+ ATPase complex with triangular geometry at the peroxisome membrane. Here the authors use electron microscopy to show that the complex undergoes conformational changes upon ATP hydrolysis, and demonstrate inter-domain communication between neighbouring nucleotide-binding domains.
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影响因子:
16
作者:
Augustin, Steffen;Gerdes, Florian;Lee, Sukyeong;Tsai, Francis T. F.;Langer, Thomas;Tatsuta, Takashi
通讯作者:
Tatsuta, Takashi
影响因子:
14.9
作者:
Goujon M;McWilliam H;Li W;Valentin F;Squizzato S;Paern J;Lopez R
通讯作者:
Lopez R
影响因子:
16.8
作者:
Martin, Andreas;Baker, Tania A.;Sauer, Robert T.
通讯作者:
Sauer, Robert T.
影响因子:
3.3
作者:
Birschmann, I;Stroobants, AK;Tabak, HF
通讯作者:
Tabak, HF
DOI:
10.1038/nsb972
发表时间:
2003-10-01
期刊:
NATURE STRUCTURAL BIOLOGY
影响因子:
--
作者:
DeLaBarre, B;Brunger, AT
通讯作者:
Brunger, AT