Spindle Pole Body
Spindle Pole Body - Related Videos
08:57
Introduction to the Power Pole Board
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2023
Source: Ali Bazzi, Department of Electrical Engineering, University of Connecticut, Storrs, CT. DC/DC converters are power electronic converters that convert DC voltages and currents from a certain level to another level. Typically, voltage conversion is the main purpose of DC/DC converters and three main types of conversion exist in a single converter: stepping up, stepping down, and stepping up or down. Among the most common step-up converters are boost converters (Refer to this collections...
09:16
Meiotic Spindle Assessment in Mouse Oocytes by siRNA-mediated Silencing
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Cited by 10 •
2015
Here, we present a protocol for specific siRNA-mediated mRNA depletion followed by immunofluorescence analysis to evaluate meiotic spindle assembly and organization in mouse oocytes. This protocol is suitable for in vitro depletion of transcripts and functional assessment of different spindle and/or MTOC-associated factors in oocytes.
01:24
Pole and System Stability
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2024
The transfer function is a fundamental concept representing the ratio of two polynomials. The numerator and denominator encapsulate the system's dynamics. The zeros and poles of this transfer function are critical in determining the system's behavior and stability. Simple poles are unique roots of the denominator polynomial. Each simple pole corresponds to a distinct solution to the system's characteristic equation, typically resulting in exponential decay terms in the system's response.
02:27
The Mitotic Spindle
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2021
The mitotic spindle—or spindle apparatus—is a eukaryotic, cytoskeletal structure made up of long protein fibers called microtubules. Formed during cell division, the spindle separates sister chromatids and moves them to opposite ends of a parental cell, where the now individual chromosomes are distributed to two daughter cell nuclei. The bipolar configuration of the mitotic spindle facilitates chromosomal segregation, preparing the cell for division. One mechanism that ensures bipolar mitotic...
02:50
Spindle Assembly
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2021
Spindle assembly occurs through three, often coexisting, pathways – the centrosome-mediated pathway, the chromatin-mediated pathway, and the microtubule-mediated pathway – collectively contributing to form a robust spindle apparatus. In most cells, centrosomes are the primary microtubule nucleation centers. In the centrosome-mediated pathway, the G2-prophase transition triggers centrosome maturation and increased microtubule nucleation. Progressive nucleation results in a microtubule array...
FAQs
Duplication before nuclear division creates the two spindle-organizing sites needed to establish bipolar spindle architecture. That arrangement gives microtubules opposing organizational poles, allowing the spindle to connect its structure with chromosome movement during division. In this way, the timing of duplication links spindle assembly to cell-cycle progression and helps explain how accurate chromosome segregation is coordinated.
Its position in the nuclear envelope connects spindle organization with the organization of the nucleus itself. Because the structure is embedded there, spindle formation is not treated as an isolated cytoplasmic event; it is integrated with nuclear-envelope organization during division. This relationship makes fungal cells useful for examining how nuclear architecture and chromosome segregation are coordinated.
Microtubule nucleation provides the physical framework for the mitotic or meiotic spindle. Once organized into a spindle, these microtubules link spindle architecture to the movement of chromosomes, so the structure can be studied as both an organizer of microtubules and a contributor to inheritance. The key outcome is coordinated chromosome segregation during nuclear division.
The spindle pole body is functionally comparable to the centrosome, but the comparison is especially useful in fungi because it highlights a different cellular setting for microtubule organization. Studying this counterpart shows that bipolar spindle assembly and chromosome segregation can be organized through a fungal structure embedded in the nuclear envelope, rather than by focusing only on centrosomal organization.
Yeast and other fungi provide research systems in which spindle pole bodies can be examined in relation to mitosis, meiosis, microtubule organization, and chromosome inheritance. Their value extends beyond describing one structure: these studies help identify conserved principles governing spindle assembly, nuclear-envelope organization, and cell-cycle control across biological contexts.
Research across mitosis and meiosis uses the spindle pole body to connect spindle formation with chromosome inheritance. Examining these division contexts can clarify how cells assemble bipolar spindles, coordinate nuclear-envelope organization, and regulate cell-cycle progression. The resulting perspective places chromosome segregation within a broader framework of microtubule organization and division control in fungi.