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Literature DB >> 6050948

Models of muscle Z-band fine structure based on a looping filament configuration.

Abstract

The fine architecture of skeletal muscle Z bands is considered in view of stereo electron microscopical evidence and current biochemical and immunological concepts, and a new Z-band model is proposed. This model is based on a looping, interlinking configuration, within the Z band, of strands which emanate from I-band (actin) filaments of adjacent sarcomeres. Two versions of the model seem presently feasible: one in which the Z-band lattice is composed of actin loops; and another in which the same pattern is derived from tropomyosin. Either version satisfies actual electron micrograph images as well as or better than prior Z-band models. Moreover, the principle of looping linkage in filament-to-filament attachment can be related to similar filament patterns seen in several adhesion sites where intracellular filaments insert on cell membranes.

Mesh：

Substances：
Muscle Proteins

Year: 1967 PMID： 6050948 PMCID： PMC2107182 DOI： 10.1083/jcb.34.3.827

Source DB: PubMed Journal: J Cell Biol ISSN： 0021-9525 Impact factor: 10.539

15 in total

1. STRUCTURAL ARRANGEMENTS AND THE CONTRACTION MECHANISM IN STRIATED MUSCLE.

Authors: H E HUXLEY
Journal: Proc R Soc Lond B Biol Sci Date: 1964-10-27

2. THE STRUCTURE OF ACTIN FILAMENTS AND THE ORIGIN OF THE AXIAL PERIODICITY IN THE I-SUBSTANCE OF VERTEBRATE STRIATED MUSCLE.

Authors: J HANSON; J LOWY
Journal: Proc R Soc Lond B Biol Sci Date: 1964-10-27

Models of muscle Z-band fine structure based on a looping filament configuration.

1. STRUCTURAL ARRANGEMENTS AND THE CONTRACTION MECHANISM IN STRIATED MUSCLE.

2. THE STRUCTURE OF ACTIN FILAMENTS AND THE ORIGIN OF THE AXIAL PERIODICITY IN THE I-SUBSTANCE OF VERTEBRATE STRIATED MUSCLE.

3. THE Z DISC OF SKELETAL MUSCLE FIBRILS.

4. ULTRASTRUCTURE OF DEVELOPING MUSCLE CELLS IN THE CHICK EMBRYO.

5. CENTRAL "CORE" DISEASE OF SKELETAL MUSCLE. ULTRASTRUCTURAL AND CYTOCHEMICAL OBSERVATIONS IN TWO CASES.

6. The fine structure of the rod-like bodies in nemaline myopathy and their relation to the Z-discs.

7. Fine structure of desmosomes. , hemidesmosomes, and an adepidermal globular layer in developing newt epidermis.

8. The use of lead citrate at high pH as an electron-opaque stain in electron microscopy.

9. Improvements in epoxy resin embedding methods.

10. Observations by electron microscopy on contraction of skeletal myofibrils induced with adenosinetriphosphate.

1. Vertebrate muscle Z-line structure: an electron microscopic study of negatively-stained myofibrils.

2. The Z-band lattice in skeletal muscle before, during and after tetanic contraction.

3. The effect of tilting ultrathin sections on the image of the Z-disc of skeletal muscle.

4. The cytoplasmic body: another structural anomaly of the Z disk.

5. On the relationship of ultrastructural and cytochemical features of color in mammalian skeletal muscle.

6. [Ultrastructural changes of muscle fibers in progressive muscular dystrophy of Duchenne type].

7. The Z-band lattice in a slow skeletal muscle.

8. Optical diffraction of the Z lattice in canine cardiac muscle.

9. Stretch and radial compression studies on relaxed skinned muscle fibers of the frog.

10. The Z-band: 85,000-dalton amorphin and alpha-actinin and their relation to structure.