Micronema

Micronemes are thread-like structures consisting of the protein actin. They play an important role in cell movement and intracellular transport.

Micronemes are present in most eukaryotic cells. They are constantly assembled and disassembled in the cell, ensuring its mobility and change in shape. The contraction of micronemes allows cells to crawl, and their growth pushes the cell membrane forward as they move.

Micronemes play an important role in processes such as embryonic development, wound healing, and immune response. Disturbances in the functioning of micronemes can lead to various diseases. For example, mutations in proteins that regulate microneme assembly cause hereditary neuromuscular diseases.

Micronemes were discovered in the late 19th century and studied in detail in the mid-20th century using electron microscopy. Their structure and functions are still actively studied in the field of cell biology.

The text did not provide the opportunity to write a full-fledged article, but I can provide useful definitions for the query “micronema”. The term "micronega" comes from the ancient Greek word μικρός "small" and the Greek word νημα "thread". Thus, a microneme is a "micronemoid filament". The definition was given in 1872 by the German zoologist Heinrich von Rusedt. Important properties of micronemes are their high mobility (rapid change of conformations) and the ability for spontaneous internal transition from the globular to fibrillar conformation and back. This allows them to envelop polymer particles and bind together complexes of macromolecules.