ZWINT Activators
ZWINT, ZW10 Interactor, plays a pivotal role in the mitotic process, serving as a critical component of the spindle assembly checkpoint (SAC), a safeguard mechanism that ensures chromosomes are properly attached to the spindle microtubules before cell division proceeds. This protein is localized at the kinetochores, the structures on chromosomes where spindle fibers attach during mitosis. The presence and proper function of ZWINT at the kinetochore are essential for activating the SAC in response to unattached or improperly attached chromosomes, thus preventing the onset of anaphase and ensuring genomic stability. The importance of ZWINT extends beyond its role in the SAC; it is also involved in stabilizing kinetochore-microtubule interactions, further underscoring its critical contribution to accurate chromosome segregation. Through its interaction with other kinetochore proteins, ZWINT facilitates the recruitment and assembly of the SAC complex, highlighting its role as a key mediator in the coordination of chromosome alignment and segregation.
The activation of ZWINT and its role in the SAC are contingent upon a series of complex biochemical and cellular events. Initially, ZWINT is recruited to the kinetochores in early mitosis, where it interacts with other SAC proteins, including ZW10 and Rod, to form a functional unit capable of responding to kinetochore-microtubule attachment status. The activation of ZWINT involves its precise localization and timing of expression, which are regulated by cell cycle-dependent kinases and other post-translational modifications that ensure its availability and functionality at critical stages of mitosis. Once activated, ZWINT plays a crucial role in the recruitment of other SAC components to the kinetochore, facilitating the generation of a "wait" signal that halts the cell cycle until all chromosomes are properly aligned and attached to spindle fibers. This mechanism of action underscores the sophistication of cellular processes that maintain genomic integrity through the precise regulation of mitotic progression. The deactivation or release of the SAC signal by ZWINT, following successful chromosome alignment, illustrates the dynamic nature of its role, transitioning from an activator of the checkpoint to enabling the progression of the cell cycle into anaphase, thereby ensuring that cell division is both accurate and timely. Through these mechanisms, ZWINT exemplifies the intricate interplay between molecular signals and cellular structures that govern the faithful duplication and distribution of the genetic material, critical for the survival and propagation of cellular life.
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| Product Name | CAS # | Catalog # | QUANTITY | Price | Citations | RATING |
|---|---|---|---|---|---|---|
Bisindolylmaleimide I (GF 109203X) | 133052-90-1 | sc-24003A sc-24003 | 1 mg 5 mg | $105.00 $242.00 | 36 | |
A potent and specific inhibitor of protein kinase C (PKC), Bisindolylmaleimide I indirectly enhances the activity of ZWINT. PKC inhibition can lead to a reduction in phosphorylation of downstream targets, which may interfere with the spindle assembly checkpoint (SAC) where ZWINT functions. By modulating this signaling, Bisindolylmaleimide I can indirectly enhance the affinity of ZWINT to kinetochores, a crucial step in SAC function. | ||||||
Taxol | 33069-62-4 | sc-201439D sc-201439 sc-201439A sc-201439E sc-201439B sc-201439C | 1 mg 5 mg 25 mg 100 mg 250 mg 1 g | $41.00 $74.00 $221.00 $247.00 $738.00 $1220.00 | 39 | |
Paclitaxel stabilizes microtubules and can enhance the activity of ZWINT by promoting the microtubule-kinetochore attachment. This stabilization increases the tension across kinetochores, which is sensed by the SAC where ZWINT is a critical component. Enhanced tension can amplify the ZWINT-mediated response, ensuring proper chromosome alignment and segregation. | ||||||
Monastrol | 254753-54-3 | sc-202710 sc-202710A | 1 mg 5 mg | $120.00 $233.00 | 10 | |
Monastrol is a kinesin Eg5 inhibitor that leads to the formation of monopolar spindles, thereby activating the SAC and enhancing the function of SAC components like ZWINT. The improper spindle architecture increases the requirement for SAC proteins, including ZWINT, to prevent premature anaphase onset, thus potentially increasing ZWINT's kinetochore localization and activity. | ||||||
MG-132 [Z-Leu- Leu-Leu-CHO] | 133407-82-6 | sc-201270 sc-201270A sc-201270B | 5 mg 25 mg 100 mg | $60.00 $265.00 $1000.00 | 163 | |
MG132 is a proteasome inhibitor that prevents the degradation of cyclins and other regulatory proteins, indirectly enhancing ZWINT activity. By inhibiting the proteasome, MG132 causes an accumulation of mitotic cyclins and a sustained activation of the SAC, where ZWINT functions. This accumulation may enhance the recruitment and activity of ZWINT at kinetochores, as part of the checkpoint surveillance mechanism. | ||||||
Nocodazole | 31430-18-9 | sc-3518B sc-3518 sc-3518C sc-3518A | 5 mg 10 mg 25 mg 50 mg | $59.00 $85.00 $143.00 $247.00 | 38 | |
Nocodazole disrupts microtubule polymerization, leading to spindle damage and activation of the SAC, which indirectly enhances ZWINT function. As a component of the SAC, ZWINT activity is critical when microtubule dynamics are perturbed, as it helps to maintain chromosome stability until proper spindle formation and attachment are restored. | ||||||
Reversine | 656820-32-5 | sc-203236 | 5 mg | $221.00 | 13 | |
Reversine is an Aurora B kinase inhibitor that can indirectly enhance the function of ZWINT by affecting chromosome alignment and the SAC. By inhibiting Aurora B kinase, reversine disrupts proper chromosome bi-orientation and tension across the kinetochores, thereby leading to the activation of the SAC and increased demand for ZWINT activity at the kinetochores to prevent erroneous chromosome segregation. | ||||||
ZM-447439 | 331771-20-1 | sc-200696 sc-200696A | 1 mg 10 mg | $153.00 $356.00 | 15 | |
ZM447439 is an Aurora kinase inhibitor that indirectly enhances ZWINT activity by disrupting proper chromosome alignment and kinetochore-microtubule attachments, leading to SAC activation. As a central player in the SAC, ZWINT's function is upregulated when the kinetochore-microtubule interactions are compromised. | ||||||
S-Trityl-L-cysteine | 2799-07-7 | sc-202799 sc-202799A | 1 g 5 g | $32.00 $66.00 | 6 | |
S-trityl-L-cysteine is a spindle poison that inhibits the proper formation of mitotic spindles, leading to SAC activation and indirect enhancement of ZWINT activity. As a component of the SAC, ZWINT plays a crucial role in delaying anaphase onset until all chromosomes are correctly attached to the spindle. | ||||||