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Echinobase
ECB-ART-35033
Eur J Biochem 1982 Jul 01;1252:277-82. doi: 10.1111/j.1432-1033.1982.tb06679.x.
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Purification and characterization of actinogelin, a calcium-sensitive actin-accessory protein, from rat liver.

Kuo PF , Mimura N , Asano A .


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Although cell-free extracts prepared from several types of free-living cells, including Ehrlich tumor cells, macrophages and sea-urchin eggs, readily form gels under low Ca2+ conditions, no such ability to induce actin-related gel has been detected in tissue-cell extracts. Ca2+ -insensitive gelation activity was discovered, however, in several tissue-cell extracts, including liver and brain, provided that the extracts were supplemented with skeletal muscle actin. Based on sodium dodecylsulfate/polyacrylamide gel electrophoretic analysis of the gel, these extracts seem to contain both a Ca2+ -insensitive gelation factor and Ca2+ -sensitive one, actinogelin. A procedure for purification of actinogelin from rat liver was developed, and the properties of actinogelin thus purified were compared with those of Ehrlich tumor cell actinogelin. No appreciable difference was found in these two proteins, and Ca2+ sensitivity (50% inhibition of gelation at 1 microM) was very similar. Some of the molecular characteristics are described, and the importance of the presence of actinogelin in tissue cells is discussed.

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Genes referenced: clcn2 LOC100887844 LOC115919910 LOC590297