IndraLab

Statements


| 12 9

sparser
"The binding of CaM to hEAG1 is, in contrast to Ca(2+)-activated potassium channels, Ca(2+) dependent, with an apparent K(D) of 480 nM."

sparser
"Mutations at these two sites completely abolished CaM binding to hEAG1, indicating that the BD-N and BD-C2 binding domains are required for CaM binding."

sparser
"CaM binds Eag1 in the presence of Ca 2+ and inhibits ion conduction ( xref ) ( xref , xref )."

reach
"CaM binds to Eag1 only in the presence of calcium and holds the pore closed even during membrane depolarization."

reach
"The combined four mutations F151S, A152S, F714S, F717S are therefore sufficient to hinder the binding of CaM to hEAG1 (p> 0.05) BD-C1 and other auxiliary sites can still be involved in the binding mechanism in a cooperative manner."

reach
"We conclude that these two CaM binding sites, the high-affinity 1-8-14 CaM binding domain in the N-terminus and the previously described C-terminal binding domain at AA 707-276, are the major binding sites involved in CaM binding to EAG1."

sparser
"Mutations at these sites completely abolished CaM binding to hEAG1."

reach
"The further inspection of CaM bound EAG1 structure showed that all three previously identified CaM binding sites are occupied by one CaM and four CaM molecules are bound to the functional tetramer channel."

sparser
"An important breakthrough provided by the new structures is the demonstration that: (i) the initial hERG N-tail is positioned in close contact with the S4–S5 and the C-linkers (that are directly attached to the carboxy terminus of the S4 and S6 helices, respectively) and with the long S2–S3 linker (a conserved feature of the KCNH channel family) [ xref , xref , xref ] ( xref ), and (ii) although non-domain swapping exists in the VSD region of eag1 and hERG, an extensive domain swapping exists within the cytoplasmic regions, and this is increased in the case of eag1 trough interaction with CaM, which in conjunction with domain swapping between N- and C-termini establishes a bridge, encompassing three subunits ( xref )."

sparser
"Calmodulin interaction with hEAG1 visualized by FRET microscopy."

reach
"The binding of CaM to hEAG1 is, in contrast to Ca (2+)-activated potassium channels, Ca (2+) dependent, with an apparent K (D) of 480 nM."

reach
"Mutations at these sites completely abolished CaM binding to hEAG1."

reach
"Mutations at these two sites completely abolished CaM binding to hEAG1, indicating that the BD-N and BD-C2 binding domains are required for CaM binding."

reach
"The basis for this effect is observed in the structure of Eag1 bound to CaM as the closed pore is decoupled from the up or depolarized VS (XREF_FIG, XREF_FIG)."

sparser
"We determined the single-particle cryo-electron microscopy structure of mammalian K(v)10.1, or Eag1, bound to the channel inhibitor calmodulin, at 3.78 angstrom resolution."

sparser
"Indeed, the N- and C-terminal domains of hEag1 interacts with calmodulin (Schönherr et al., xref ; Ziechner et al., xref ; Gonçalves and Stühmer, xref ), cortactin (Herrmann et al., xref ); KCa3.1 channels interact with ERK1/2 (Millership et al., xref ), and HERG1 channels with the adaptor protein 14-3-3 (Kagan et al., xref ), Src tyrosine kinase (Cayabyab and Schlichter, xref ), and the TNF-α receptor (Wang et al., xref )."

reach
"This indicates that the C-terminus of hEAG1 only binds CaM in its Ca 2+ -bound state."

sparser
"The basis for this effect is observed in the structure of Eag1 bound to CaM as the closed pore is decoupled from the up or depolarized VS ( xref , xref )."

reach
"The recent CaM bound cryo-EM structure model of rat EAG1 channels provided more detailed information [XREF_BIBR]."

reach
"Calmodulin interaction with hEAG1 visualized by FRET microscopy."

reach
"CaM binds Eag1 in the presence of Ca 2+ and inhibits ion conduction (XREF_FIG)."