Acetylcholinesterase clustering at the neuromuscular junction involves perlecan and dystroglycan.
Acetylcholinesterase clustering at the neuromuscular junction involves perlecan and dystroglycan.
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DOI:
10.1083/jcb.145.4.911
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发表时间:
1999-05-17
期刊:
影响因子:
--
通讯作者:
Rotundo RL
中科院分区:
文献类型:
--
作者:
Peng HB;Xie H;Rossi SG;Rotundo RL
Formation of the synaptic basal lamina at vertebrate neuromuscular junction involves the accumulation of numerous specialized extracellular matrix molecules including a specific form of acetylcholinesterase (AChE), the collagenic-tailed form. The mechanisms responsible for its localization at sites of nerve– muscle contact are not well understood. To understand synaptic AChE localization, we synthesized a fluorescent conjugate of fasciculin 2, a snake α-neurotoxin that tightly binds to the catalytic subunit. Prelabeling AChE on the surface of Xenopus muscle cells revealed that preexisting AChE molecules could be recruited to form clusters that colocalize with acetylcholine receptors at sites of nerve–muscle contact. Likewise, purified avian AChE with collagen-like tail, when transplanted to Xenopus muscle cells before the addition of nerves, also accumulated at sites of nerve–muscle contact. Using exogenous avian AChE as a marker, we show that the collagenic-tailed form of the enzyme binds to the heparan-sulfate proteoglycan perlecan, which in turn binds to the dystroglycan complex through α-dystroglycan. Therefore, the dystroglycan–perlecan complex serves as a cell surface acceptor for AChE, enabling it to be clustered at the synapse by lateral migration within the plane of the membrane. A similar mechanism may underlie the initial formation of all specialized basal lamina interposed between other cell types.
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DOI:
10.1083/jcb.110.6.2061
发表时间:
1990-06
期刊:
The Journal of cell biology
影响因子:
--
作者:
Chen Q;Sealock R;Peng HB
通讯作者:
Peng HB
影响因子:
5.5
作者:
ANDERSON, MJ;COHEN, MW
通讯作者:
COHEN, MW
影响因子:
64.5
作者:
Grady, RM;Teng, HB;Sanes, JR
通讯作者:
Sanes, JR
影响因子:
64.5
作者:
CAMPANELLI, JT;ROBERDS, SL;SCHELLER, RH
通讯作者:
SCHELLER, RH
DOI:
10.1073/pnas.71.4.1376
发表时间:
1974-01-01
影响因子:
11.1
作者:
FERTUCK H C;SALPETER M M
通讯作者:
SALPETER M M