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Nuclear protein matrix in giant nuclei from salivary glands of Chironomus plumosus

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Biochemistry (Moscow) Supplement Series A: Membrane and Cell Biology Aims and scope

Abstract

Polythene chromosomes from salivary glands of Chironomus plumosus were treated in situ in order to reveal residual nuclear protein matrix (NPM). It was shown that after the removal of H1-histones by 0.6 M NaCl the general morphology of chromosomes is preserved, revealing distinct banding pattern. Further treatment of chromosomes with 2 M NaCl and DNase completely disorganized the structure of chromosome bodies and patterns of banding. Preliminary treatment of salivary glands with 2 mM CuCl2 resulted in stabilization of the structure of polythene chromosome in every stage of histone and DNA extractions. Stabilized chromosomes maintained their morphology and banding patterns observed by phase contrast or after the staining with Brilliant blue. Thus, after the removal of histones and DNA, stabilized chromosomes retain their morphological features, which depend on the presence of NMP. In stabilized polythene chromosomes, in spite of the absence of histones and DNA, topoisomerase IIα retains its localization, typical for untreated chromosomes.

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Authors and Affiliations

  1. Biology Department, Lomonosov Moscow State University, Moscow, 119991, Russia

    M. S. Makarov & Yu. S. Chentsov

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  1. M. S. Makarov
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  2. Yu. S. Chentsov
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Correspondence to M. S. Makarov.

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Original Russian Text © M.S. Makarov, Yu.S. Chentsov, 2010, published in Biologicheskie Membrany, 2010, Vol. 27, No. 2, pp. 166–176.

The article was translated by the authors.

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Makarov, M.S., Chentsov, Y.S. Nuclear protein matrix in giant nuclei from salivary glands of Chironomus plumosus . Biochem. Moscow Suppl. Ser. A 4, 171–179 (2010). https://doi.org/10.1134/S1990747810020078

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  • DOI: https://doi.org/10.1134/S1990747810020078

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