Impaired dense core vesicle maturation in Caenorhabditis elegans mutants lacking Rab2.
Impaired dense core vesicle maturation in Caenorhabditis elegans mutants lacking Rab2.
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缺乏RAB2的秀丽隐杆线虫突变体中的密集核囊泡成熟受损。
DOI:
10.1083/jcb.200902095
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发表时间:
2009-09-21
期刊:
影响因子:
--
通讯作者:
Miller KG
中科院分区:
文献类型:
--
作者:
Edwards SL;Charlie NK;Richmond JE;Hegermann J;Eimer S;Miller KG
Uncoordinated movement in Rab2 mutants is caused by impaired retention of cargo on dense core vesicles, not by defective synaptic vesicle release. (Also see the companion article by Sumakovic et al. in this issue.) Despite a key role for dense core vesicles (DCVs) in neuronal function, there are major gaps in our understanding of DCV biogenesis. A genetic screen for Caenorhabditis elegans mutants with behavioral defects consistent with impaired DCV function yielded five mutations in UNC-108 (Rab2). A genetic analysis showed that unc-108 mutations impair a DCV function unrelated to neuropeptide release that, together with neuropeptide release, fully accounts for the role of DCVs in locomotion. An electron microscopy analysis of DCVs in unc-108 mutants, coupled with quantitative imaging of DCV cargo proteins, revealed that Rab2 acts in cell somas during DCV maturation to prevent the loss of soluble and membrane cargo. In Rab2 null mutants, two thirds of these cargoes move to early endosomes via a PI(3)P-dependent trafficking pathway, whereas aggregated neuropeptides are unaffected. These results reveal how neurons solve a challenging trafficking problem using the most highly conserved animal Rab.
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影响因子:
4
作者:
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通讯作者:
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影响因子:
3.3
作者:
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通讯作者:
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影响因子:
7.5
作者:
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通讯作者:
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影响因子:
10.5
作者:
Hajdu-Cronin, YM;Chen, WJ;Sternberg, PW
通讯作者:
Sternberg, PW
DOI:
10.1016/s1383-5718(01)00198-x
发表时间:
2001-08-22
影响因子:
1.9
作者:
De Stasio, EA;Dorman, S
通讯作者:
Dorman, S