Abstract:
:Nuclear ionic channels (NICs) represent ubiquitous structures of living cells, although little is known about their functional properties and encoding genes. To characterize NICs, liver nuclear membrane vesicles were reconstituted into either planar lipid bilayers or proteoliposomes. Reconstitution of nuclear envelope (NE) vesicles into planar lipid bilayer proceeded with low efficiency. NE vesicle reconstitution into proteoliposomes led to NIC observations by the patch-clamp technique. Large conductance, voltage-gated, K(+)-permeant and Cl(-)-permeant NICs were characterized. An 80-105-pS K(+)-permeant NIC with conducting sub-state was also recorded. Our data establish that NICs can be characterized upon reconstitution into giant proteoliposomes and retain biophysical properties consistent with those described for native NICs.
journal_name
FEBS Lettjournal_title
FEBS lettersauthors
Guihard G,Proteau S,Payet MD,Escande D,Rousseau Edoi
10.1016/s0014-5793(00)01752-xkeywords:
subject
Has Abstractpub_date
2000-07-07 00:00:00pages
234-9issue
3eissn
0014-5793issn
1873-3468pii
S0014-5793(00)01752-Xjournal_volume
476pub_type
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