Centriole : It is a pair of structures that are part of the cytoskeleton , similar to hollow cylinders .
Summary
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- 1 Structure
- 2 Location
- 3 function
- 4 Sources
Structure
Each centriole is made up of nine triplets of microtubules forming a circle. The innermost is called microtubule A and is complete (composed of three protofilaments). Two microtubules are attached to it: microtubule B, which shares three protofilaments with A, and microtubule C, the outermost, which shares three protofilaments with B. The triplets join together thanks to a protein called nexin, which connects the microtubule A with the C of the next triplet.
location
The centriole is an organelle that is usually located near the nucleus or on the concave side of the Golgi apparatus and is only present in animal cells .
Function
During the process of cell division, the centrioles move until they are placed on opposite sides of the cell, it is then that a cluster of radial filaments emerges from each one, which is called aster. Subsequently, a spindle is formed between both centrioles by means of the filaments. These filaments are composed of protein and trace amounts of ribonucleic acid. Chromosomes attach to these strands at the centromere and are then pushed to one side of the cell and others to the opposite side.
