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Literature DB >> 7023866

The subunit structure of chromatin fibres.

J A Subirana, S Muñoz-Guerra, A B Martínez, L Pérez-Grau, X Marcet, I Fita.

Abstract

Optimal conditions for studying the ultrastructure of chromatin fibers of histone-containing spermatozoa in thin sections have been determined. Better results for preservation in sperm of the sea cucumber Holothuria tubulosa, have been found than in different frog species studied. The fine structure of chromatin fibers after different treatments was studied by computer materials. A clear superbead structure was found under all conditions which preserve the chromatin fibres. These have a diameter of 30 nm, with superbeads about 33 nm long. In the best preserved cases an additional periodicity of 11 nm along the fibres was found. There is no clear relationship of this periodicity with an eventual solenoidal structure of the chromatin fibers.

Entities: Disease

Mesh：

Substances：
Chromatin

Year: 1981 PMID： 7023866 DOI： 10.1007/bf00328272

Source DB: PubMed Journal: Chromosoma ISSN： 0009-5915 Impact factor: 4.316

15 in total

10. Involvement of histone H1 in the organization of the nucleosome and of the salt-dependent superstructures of chromatin.

Authors: F Thoma; T Koller; A Klug
Journal: J Cell Biol Date: 1979-11 Impact factor: 10.539

5 in total

5. Differences of supranucleosomal organization in different kinds of chromatin: cell type-specific globular subunits containing different numbers of nucleosomes.

Authors: H Zentgraf; W W Franke
Journal: J Cell Biol Date: 1984-07 Impact factor: 10.539

5 in total

The subunit structure of chromatin fibres.

1. Spheroid chromatin units (v bodies).

2. Studies on the thermal denaturation of nucleohistones.

3. An unusual group of lysine-rich histones from gonads of a sea cucumber, Holothuria tubulosa.

4. Histones from sperm of the sea urchin Arbacia lixula.

5. Native and reconstituted chromosome fiber fragments.

6. Nucleosome arcs and helices.

7. Subunit structures of different electrophoretic forms of nucleosomes.

8. A repeating unit of higher order chromatin structure in chick red blood cell nuclei.

9. Electrophoretic analysis of liver and testis histones of the frog Rana pipiens.

10. Involvement of histone H1 in the organization of the nucleosome and of the salt-dependent superstructures of chromatin.

1. The fine structure of euchromatin and centromeric heterochromatin in Tenebrio molitor chromosomes.

2. Nucleosomal organization of a part of chromatin in mollusc sperm nuclei with a mixed basic protein composition.

3. Supranucleosomal organization of chromatin. Electron microscopic visualization of long polynucleosomal chains.

4. The layered organization of nucleosomes in 30 nm chromatin fibers.

5. Differences of supranucleosomal organization in different kinds of chromatin: cell type-specific globular subunits containing different numbers of nucleosomes.