PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 3593228-2 1987 In an effort to elucidate the mechanism of calmodulin regulation of muscle contraction, we investigated the interaction between calmodulin and troponin components in the presence of Ca2+ or Sr2+ by the use of ultracentrifugation methods and polyacrylamide-gel electrophoresis. strontium cation 190-194 calmodulin 1 Homo sapiens 128-138 3593228-9 1987 Sr2+-induced exposure of the hydrophobic region enables calmodulin to bind to troponin I, as is the case with Ca2+. strontium cation 0-4 calmodulin 1 Homo sapiens 56-66 3593228-4 1987 When troponin T was absent, calmodulin bound to troponin I and dissociated it from the tropomyosin-actin complex in the presence of Ca2+ or Sr2+. strontium cation 140-144 calmodulin 1 Homo sapiens 28-38 3593228-7 1987 Calmodulin migrated more slowly in the presence of Sr2+ than it did in the presence of EGTA but faster than it did in the presence of Ca2+ on polyacrylamide-gel electrophoresis under non-denaturing conditions. strontium cation 51-55 calmodulin 1 Homo sapiens 0-10 19297189-10 2009 The order of affinity for apo CaM is Ca(2+) >> Sr(2+) approximately Mg(2+) > Pb(2+) approximately Cd(2+). strontium cation 53-59 calmodulin 1 Homo sapiens 30-33 6314931-3 1983 Calmodulin dependent phosphodiesterase was activated with Pb2+, Ca2+, Sr2+, Ba2+, and Cd2+ (EC50 about 0.8 microM). strontium cation 70-74 calmodulin 1 Homo sapiens 0-10 6314931-10 1983 Calmodulin binding to brain membranes was enhanced with concentrations below 10(-4)M in the following order: Pb2+ greater than or equal to Ca2+ approximately Sr2+ greater than Cd2+ greater than Mn2+ greater than Ba2+. strontium cation 158-162 calmodulin 1 Homo sapiens 0-10 6314931-13 1983 In the flow-dialysis, other ions competed with 45Ca2+ binding to calmodulin in the following order: Pb2+ approximately Ca2+ greater than Mn2+, Ba2+, Cd2+, Sr2+. strontium cation 155-159 calmodulin 1 Homo sapiens 65-75 9850564-9 1998 Moreover, our data suggest that the toxicity of Pb(2+)--which, like Sr2+, binds with an equal and high affinity to all four sites--may be related to its capacity to tightly bind and improperly activate calmodulin. strontium cation 68-72 calmodulin 1 Homo sapiens 202-212 17661504-4 2007 We study CaM complexes with the physiologically important ions of calcium (Ca2+) and magnesium (Mg2+) and also with two other ions, strontium (Sr2+) and lanthanum (La3+). strontium cation 143-147 calmodulin 1 Homo sapiens 9-12