[Answer] Centrosomes are sites where protein dimers assemble into _______________

Answer: microtubules
Centrosomes are sites where protein dimers assemble into _______________
Centrosomes are associated with the nuclear membrane during the prophase stage of the cell cycle. During mitosis the nuclear membrane breaks down and the centrosome-nucleated microtubules can interact with the chromosomes to build the mitotic spindle.. The mother centriole the older of the two in the centriole pair also has a central role in making cilia and …
Microtubules are assembled from dimers of α- and β-tubulin. These subunits are slightly acidic with an isoelectric point between 5.2 and 5.8. Each has a molecular weight of approximately 50 kDa.. To form microtubules the dimers of α- and β-tubulin bind to GTP and assemble onto the (+) ends of microtubules while in the GTP-bound state. The β-tubulin subunit is exposed on …
Microtubules are nucleated and organized by microtubule organizing centers (MTOCs) such as the centrosome found in the center of many animal cells or the basal bodies found in cilia and flagella or the spindle pole bodies found in most fungi.
The γ-TuRCs in the centrosome nucleate an array of microtubules in interphase which extend their (+)-ends radially outwards into the cytoplasm towards the periphery of the cell. Among its other functions this radial array is used by microtubule-based motor proteins to transport various cargoes such as vesicles to the plasma membrane.
There is no known motif or structure that makes a protein belong to SPB but analysis of known SPB proteins and their genes shows several common features. The core contains mostly proteins with coiled-coil motifs that allow to form dimers either with themselves or with others proteins and maintain regular structures (e.g. CP IL2).
Telophase (from t…

Leave a Reply