New splicing variants of mitochondrial Rho GTPase-1 (Miro1) transport peroxisomes.
New splicing variants of mitochondrial Rho GTPase-1 (Miro1) transport peroxisomes.
复制标题
DOI:
10.1083/jcb.201708122
复制
发表时间:
2018-02-05
期刊:
影响因子:
--
通讯作者:
Fujiki Y
中科院分区:
文献类型:
--
作者:
Okumoto K;Ono T;Toyama R;Shimomura A;Nagata A;Fujiki Y
The mechanisms underlying microtubule-dependent long-distance movement of peroxisomes in mammalian cells are unclear. Okumoto et al. identify splicing variants of human mitochondrial Rho GTPase-1 (Miro1) that localize to peroxisomes and that link these organelles to microtubule-dependent transport complexes including TRAK2. Microtubule-dependent long-distance movement of peroxisomes occurs in mammalian cells. However, its molecular mechanisms remain undefined. In this study, we identified three distinct splicing variants of human mitochondrial Rho GTPase-1 (Miro1), each containing amino acid sequence insertions 1 (named Miro1-var2), 2 (Miro1-var3), and both 1 and 2 (Miro1-var4), respectively, at upstream of the transmembrane domain. Miro1-var4 and Miro1-var2 are localized to peroxisomes in a manner dependent on the insertion 1 that is recognized by the cytosolic receptor Pex19p. Exogenous expression of Miro1-var4 induces accumulation of peroxisomes at the cell periphery and augments long-range movement of peroxisomes along microtubules. Depletion of all Miro1 variants by knocking down MIRO1 suppresses the long-distance movement of peroxisomes. Such abrogated movement is restored by reexpression of peroxisomal Miro1 variants. Collectively, our findings identify for the first time peroxisome-localized Miro1 variants as adapter proteins that link peroxisomes to the microtubule-dependent transport complexes including TRAK2 in the intracellular translocation of peroxisomes in mammalian cells.
登录
查看更多内容
影响因子:
4.3
作者:
Abrahamsen G;Fan Y;Matigian N;Wali G;Bellette B;Sutharsan R;Raju J;Wood SA;Veivers D;Sue CM;Mackay-Sim A
通讯作者:
Mackay-Sim A
DOI:
10.1083/jcb.93.1.97
发表时间:
1982-04
期刊:
The Journal of cell biology
影响因子:
--
作者:
Fujiki Y;Hubbard AL;Fowler S;Lazarow PB
通讯作者:
Lazarow PB
DOI:
10.1083/jcb.201608128
发表时间:
2017-02
期刊:
The Journal of cell biology
影响因子:
--
作者:
Hua R;Cheng D;Coyaud É;Freeman S;Di Pietro E;Wang Y;Vissa A;Yip CM;Fairn GD;Braverman N;Brumell JH;Trimble WS;Raught B;Kim PK
通讯作者:
Kim PK
DOI:
10.1083/jcb.200601067
发表时间:
2006-05-22
期刊:
The Journal of cell biology
影响因子:
--
作者:
Glater EE;Megeath LJ;Stowers RS;Schwarz TL
通讯作者:
Schwarz TL
DOI:
10.1038/nrm3226
发表时间:
2011-11-16
期刊:
Nature reviews. Molecular cell biology
影响因子:
--
作者:
通讯作者:
--