Atg38 is required for autophagy-specific phosphatidylinositol 3-kinase complex integrity.
Atg38 is required for autophagy-specific phosphatidylinositol 3-kinase complex integrity.
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DOI:
10.1083/jcb.201304123
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发表时间:
2013-10-28
期刊:
影响因子:
--
通讯作者:
Ohsumi Y
中科院分区:
文献类型:
--
作者:
Araki Y;Ku WC;Akioka M;May AI;Hayashi Y;Arisaka F;Ishihama Y;Ohsumi Y
Atg38 provides a physical linkage between the Vps15–Vps34 and Atg14–Vps30 subcomplexes to facilitate PI3-kinase complex I formation. Autophagy is a conserved eukaryotic process of protein and organelle self-degradation within the vacuole/lysosome. Autophagy is characterized by the formation of an autophagosome, for which Vps34-dervied phosphatidylinositol 3-phosphate (PI3P) is essential. In yeast, Vps34 forms two distinct protein complexes: complex I, which functions in autophagy, and complex II, which is involved in protein sorting to the vacuole. Here we identify and characterize Atg38 as a stably associated subunit of complex I. In atg38Δ cells, autophagic activity was significantly reduced and PI3-kinase complex I dissociated into the Vps15–Vps34 and Atg14–Vps30 subcomplexes. We find that Atg38 physically interacted with Atg14 and Vps34 via its N terminus. Further biochemical analyses revealed that Atg38 homodimerizes through its C terminus and that this homodimer formation is indispensable for the integrity of complex I. These data suggest that the homodimer of Atg38 functions as a physical linkage between the Vps15–Vps34 and Atg14–Vps30 subcomplexes to facilitate complex I formation.
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影响因子:
7.8
作者:
Baba, M;Osumi, M;Scott, SV;Klionsky, DJ;Ohsumi, Y
通讯作者:
Ohsumi, Y
DOI:
10.1073/pnas.94.5.1709
发表时间:
1997-03-04
影响因子:
11.1
作者:
Murakami, K;Kimura, M;Ishihama, A
通讯作者:
Ishihama, A
DOI:
10.1006/bbrc.1995.1636
发表时间:
1995-05-05
影响因子:
3.1
作者:
NODA, T;MATSUURA, A;OHSUMI, Y
通讯作者:
OHSUMI, Y
影响因子:
7
作者:
Ishihama, Y;Oda, Y;Mann, M
通讯作者:
Mann, M
影响因子:
11.8
作者:
Kanki, Tomotake;Wang, Ke;Cao, Yang;Baba, Misuzu;Klionsky, Daniel J.
通讯作者:
Klionsky, Daniel J.