A shell of F‐actin surrounds the branched nuclei of silk gland cells

Scott C. Henderson; Michael Locke

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A shell of F‐actin surrounds the branched nuclei of silk gland cells

机译：A shell of F‐actin surrounds the branched nuclei of silk gland cells

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AbstractThe branched nuclei from silk gland cells of larvae ofCalpodes ethliuslabel with antibodies to actin and myosin and with rhodaminyl‐phalloin, which is specific for f‐actin. Optical sectioning localizes this actin and myosin to the nuclear periphery. Residual nuclear‐associated fractions prepared from these cells contain sheets of nuclear lamina‐like structures that bind heavy meromyosin and gold‐tagged antibodies to actin and myosin. The results suggest that both actin and myosin, or a myosin‐like protein, are components of a layer at the nucleocytoplasmic boundary that we call the nuclear shell. The nuclear shell appears to be associated with the nuclear envelope and may correspond to a zone on the cytoplasmic face of the envelope seen in electron micrographs of unextracted cells. The residual nuclear‐associated fraction has a unique isoform of actin (43 kD, pl 6.45) that might allow the nuclei to associate with an actin network structurally and developmentally distinct from that of the cytoplasm. © 1992 W

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《Cell motility and the cytoskeleton》 |1992年第3期|169-187|共页
作者
Scott C. Henderson; Michael Locke;
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正文语种英语
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nuclear actin; nuclear myosin; nuclear shell; nuclear shape; nuclear matrix; silk gland; nuclear structure;

A shell of F‐actin surrounds the branched nuclei of silk gland cells

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