PMID- 15087548 OWN - NLM STAT- MEDLINE DCOM- 20040428 LR - 20131121 IS - 1095-9203 (Electronic) IS - 0036-8075 (Linking) VI - 304 IP - 5669 DP - 2004 Apr 16 TI - Functional stoichiometry and local enrichment of calmodulin interacting with Ca2+ channels. PG - 432-5 AB - Calmodulin (CaM) interactions with Ca2+ channels mediate both Ca2+ regulation of channels and local Ca2+ 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 Ca2+ signal from each channel. To resolve these parameters, we fused L-type Ca2+ 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 Ca2+ channels. This estimate indicates marked enrichment of local CaM, as if a "school" of nearby CaMs were poised to enhance the transduction of local Ca2+ entry into diverse signaling pathways. FAU - Mori, Masayuki X AU - Mori MX AD - Ca2+ Signals Laboratory, Department of Biomedical Engineering , Johns Hopkins University School of Medicine, 720 Rutland Avenue, Baltimore, MD 21205, USA. FAU - Erickson, Michael G AU - Erickson MG FAU - Yue, David T AU - Yue DT LA - eng PT - Journal Article PT - Research Support, U.S. Gov't, P.H.S. PL - United States TA - Science JT - Science (New York, N.Y.) JID - 0404511 RN - 0 (Calcium Channels, L-Type) RN - 0 (Calmodulin) RN - 0 (Cyclic AMP Response Element-Binding Protein) RN - 0 (L-type calcium channel alpha(1C)) RN - 0 (Peptides) RN - 0 (Recombinant Fusion Proteins) RN - 25718-94-9 (polyglycine) RN - SY7Q814VUP (Calcium) SB - IM CIN - Science. 2004 Apr 16;304(5669):394-5. PMID: 15087533 MH - Calcium/*metabolism MH - Calcium Channels, L-Type/chemistry/*metabolism MH - Calcium Signaling MH - Calmodulin/chemistry/genetics/*metabolism MH - Cell Line MH - Cell Nucleus/metabolism MH - Cyclic AMP Response Element-Binding Protein/metabolism MH - Fluorescence Resonance Energy Transfer MH - Humans MH - Mathematics MH - Mutation MH - Patch-Clamp Techniques MH - Peptides/chemistry/genetics MH - Protein Structure, Tertiary MH - Recombinant Fusion Proteins/chemistry/metabolism MH - Transfection EDAT- 2004/04/17 05:00 MHDA- 2004/04/29 05:00 CRDT- 2004/04/17 05:00 PHST- 2004/04/17 05:00 [pubmed] PHST- 2004/04/29 05:00 [medline] PHST- 2004/04/17 05:00 [entrez] AID - 304/5669/432 [pii] AID - 10.1126/science.1093490 [doi] PST - ppublish SO - Science. 2004 Apr 16;304(5669):432-5. doi: 10.1126/science.1093490.