ECB-ART-32813
J Biochem
1986 Sep 01;1003:817-20. doi: 10.1093/oxfordjournals.jbchem.a121776.
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The 45K molecular weight actin-modulating protein from sea urchin eggs forms a complex with actin in the presence of calcium ions.
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The 45K protein from sea urchin eggs forms a complex with actin in the presence of Ca2+. The fraction was not readily dissociated on depletion of Ca2+ by gel filtration, but was dissociated on dialysis against an EGTA-containing solution. The free 45K protein and the 45K protein-actin complex affect F-actin in different manners in the presence of Ca2+. The former severs F-actin in the presence of Ca2+ but not in its absence, while the latter caps the barbed end of F-actin in a Ca2+-independent manner thereby lowering the viscosity of F-actin slowly.
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Genes referenced: LOC100887844 LOC590297