Calmodulin (CaM) interactions with Ca$^2+$ channels mediate both
Ca$^2+$ regulation of channels and local Ca$^2+$ triggering
of transcription factors implicated in neuronal memory. Crucial to
these functions are the number of CaM molecules (CaMs) regulating
each channel, and the number of CaMs privy to the local Ca$^2+$
signal from each channel. To resolve these parameters, we fused L-type
Ca$^2+$ channels to single CaM molecules. These chimeric molecules
revealed that a single CaM directs L-type channel regulation. Similar
fusion molecules were used to estimate the local CaM concentration
near Ca$^2+$ channels. This estimate indicates marked enrichment
of local CaM, as if a "school" of nearby CaMs were poised to enhance
the transduction of local Ca$^2+$ entry into diverse signaling
pathways.
Ca$^2+$ Signals Laboratory, Department of Biomedical Engineering
, Johns Hopkins University School of Medicine, 720 Rutland Avenue,
Baltimore, MD 21205, USA.
%0 Journal Article
%1 Mori_2004_432
%A Mori, Masayuki X
%A Erickson, Michael G
%A Yue, David T
%D 2004
%J Science
%K AMP Calcium Calcium; Calmodulin; Cell Channels, Cyclic Element-Binding Energy Fluorescence Fusion Humans; L-Type; Line; Mathematics; Mutation; Nucleus; Patch-Clamp Peptides; Protein Protein; Proteins; Recombinant; Resonance Response Signaling; Structure, Techniques; Tertiary; Transfection Transfer;
%N 5669
%P 432--435
%R 10.1126/science.1093490
%T Functional stoichiometry and local enrichment of calmodulin interacting
with Ca$^2+$ channels.
%U http://dx.doi.org/10.1126/science.1093490
%V 304
%X Calmodulin (CaM) interactions with Ca$^2+$ channels mediate both
Ca$^2+$ regulation of channels and local Ca$^2+$ triggering
of transcription factors implicated in neuronal memory. Crucial to
these functions are the number of CaM molecules (CaMs) regulating
each channel, and the number of CaMs privy to the local Ca$^2+$
signal from each channel. To resolve these parameters, we fused L-type
Ca$^2+$ channels to single CaM molecules. These chimeric molecules
revealed that a single CaM directs L-type channel regulation. Similar
fusion molecules were used to estimate the local CaM concentration
near Ca$^2+$ channels. This estimate indicates marked enrichment
of local CaM, as if a "school" of nearby CaMs were poised to enhance
the transduction of local Ca$^2+$ entry into diverse signaling
pathways.
@article{Mori_2004_432,
abstract = {Calmodulin (CaM) interactions with {C}a$^{2+}$ channels mediate both
{C}a$^{2+}$ regulation of channels and local {C}a$^{2+}$ triggering
of transcription factors implicated in neuronal memory. Crucial to
these functions are the number of CaM molecules (CaMs) regulating
each channel, and the number of CaMs privy to the local {C}a$^{2+}$
signal from each channel. To resolve these parameters, we fused L-type
{C}a$^{2+}$ channels to single CaM molecules. These chimeric molecules
revealed that a single CaM directs L-type channel regulation. Similar
fusion molecules were used to estimate the local CaM concentration
near {C}a$^{2+}$ channels. This estimate indicates marked enrichment
of local CaM, as if a "school" of nearby CaMs were poised to enhance
the transduction of local {C}a$^{2+}$ entry into diverse signaling
pathways.},
added-at = {2009-06-03T11:20:58.000+0200},
author = {Mori, Masayuki X and Erickson, Michael G and Yue, David T},
biburl = {https://www.bibsonomy.org/bibtex/233645d2e95c120b033b0bcb0cdcfbbc5/hake},
description = {The whole bibliography file I use.},
doi = {10.1126/science.1093490},
file = {Mori_2004_432.pdf:Mori_2004_432.pdf:PDF;Mori_2004_432.pdf:Mori_2004_432.pdf:PDF},
institution = {{C}a$^{2+}$ Signals Laboratory, Department of Biomedical Engineering
, Johns Hopkins University School of Medicine, 720 Rutland Avenue,
Baltimore, MD 21205, USA.},
interhash = {a0ce5be1b2c9ee486173b63ed041599d},
intrahash = {33645d2e95c120b033b0bcb0cdcfbbc5},
journal = {Science},
keywords = {AMP Calcium Calcium; Calmodulin; Cell Channels, Cyclic Element-Binding Energy Fluorescence Fusion Humans; L-Type; Line; Mathematics; Mutation; Nucleus; Patch-Clamp Peptides; Protein Protein; Proteins; Recombinant; Resonance Response Signaling; Structure, Techniques; Tertiary; Transfection Transfer;},
month = Apr,
number = 5669,
pages = {432--435},
pii = {304/5669/432},
pmid = {15087548},
timestamp = {2009-06-03T11:21:23.000+0200},
title = {Functional stoichiometry and local enrichment of calmodulin interacting
with {C}a$^{2+}$ channels.},
url = {http://dx.doi.org/10.1126/science.1093490},
volume = 304,
year = 2004
}