Nemitin, a novel Map8/Map1s interacting protein with Wd40 repeats.

Nemitin, a novel Map8/Map1s interacting protein with Wd40 repeats.
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DOI:
10.1371/journal.pone.0033094
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发表时间:
2012
期刊:
影响因子:
3.7
通讯作者:
Yang Y
Yang Y
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Wang W;Lundin VF;Millan I;Zeng A;Chen X;Yang J;Allen E;Chen N;Bach G;Hsu A;Maloney MT;Kapur M;Yang Y

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In neurons, a highly regulated microtubule cytoskeleton is essential for many cellular functions. These include axonal transport, regional specialization and synaptic function. Given the critical roles of microtubule-associated proteins (MAPs) in maintaining and regulating microtubule stability and dynamics, we sought to understand how this regulation is achieved. Here, we identify a novel LisH/WD40 repeat protein, tentatively named nemitin (neuronal enriched MAP interacting protein), as a potential regulator of MAP8-associated microtubule function. Based on expression at both the mRNA and protein levels, nemitin is enriched in the nervous system. Its protein expression is detected as early as embryonic day 11 and continues through adulthood. Interestingly, when expressed in non-neuronal cells, nemitin displays a diffuse pattern with puncta, although at the ultrastructural level it localizes along the microtubule network in vivo in sciatic nerves. These results suggest that the association of nemitin to microtubules may require an intermediary protein. Indeed, co-expression of nemitin with microtubule-associated protein 8 (MAP8) results in nemitin losing its diffuse pattern, instead decorating microtubules uniformly along with MAP8. Together, these results imply that nemitin may play an important role in regulating the neuronal cytoskeleton through an interaction with MAP8.
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