Centromere Function
Centromere Function - Related Videos
02:30
Histone Variants at the Centromere
0 Views •
2020
Histone variants are the histone proteins with structural and sequence variations. These variants may be regarded as “mutant” forms that replace their canonical histone counterparts in the nucleosomes. Specific post-translational modifications on the histone variants enable further chromatin complexity and regulate tissue-specific gene expression. The most common histone variants are from histone H2A, H2B, and linker histone H1 families. However, several variants of histone H3 variants are also...
05:35
Immunofluorescence Analysis of Endogenous and Exogenous Centromere-kinetochore Proteins
0 Views •
Cited by 4 •
2016
Here we report protocols to detect endogenous and exogenous centromere-kinetochore proteins in human cells and quantify these protein levels at centromeres-kinetochores by indirect immunofluorescent staining through the use of fixation (paraformaldehyde, acetone, or methanol fixation).
07:18
Live Imaging Characterization of Centromere Movements During Male Meiotic Prophase in Arabidopsis thaliana
0 Views •
2025
Chromosome movement during meiotic prophase is a poorly understood phenomenon that is fundamental to spore formation. This protocol describes a method to acquire, analyze, and quantify centromere movements during meiotic prophase in Arabidopsis thaliana male meiocytes.
11:49
Generation of Centromere-Associated Protein-E CENP-E-/- Knockout Cell Lines using the CRISPR/Cas9 System
0 Views •
2023
This article reports the construction of centromere-associated protein-E (CENP-E) knockout cells using the CRISPR/Cas9 system and three phenotype-based screening strategies. We have utilized the CENP-E knockout cell line to establish a novel approach to validate the specificity and toxicity of the CENP-E inhibitors, which is useful for drug development and biological research.
02:45
Functional Groups
0 Views •
2020
Functional groups are a group of atoms with characteristic properties, which when linked to the carbon skeleton of a molecule, alter the properties of that molecule. For example, the presence of certain functional groups on a molecule will make them hydrophilic, whereas others will make them hydrophobic. These functional groups are an indispensable part of organic chemistry and important components of biological molecules, such as carbohydrates, proteins, lipids, and nucleic acids. Each...
FAQs
Centromeric chromatin provides the platform for kinetochore assembly, rather than acting as a simple passive chromosome marker. The kinetochore is a multiprotein structure positioned at this specialized region, where it coordinates spindle microtubule capture with attachment and checkpoint signaling. This organization links chromosome architecture to the mechanical and surveillance requirements of cell division.
Microtubule attachment connects chromosomes to the spindle and accompanies checkpoint signaling during division. The kinetochore therefore links a physical interaction with spindle fibers to a surveillance function at the chromosome. Together, these activities support directed movement toward opposite cell poles and help explain why attachment quality affects the reliability of chromosome inheritance.
Mitosis and meiosis are distinct division contexts, and both rely on centromere-mediated guidance of sister chromatids toward opposite poles. Considering both processes matters because errors in either can disrupt chromosome inheritance and contribute to abnormal chromosome number. This comparison also connects centromere biology with general cell division and with reproductive biology.
When centromeric assembly or spindle attachment is defective, chromosomes may segregate incorrectly. The resulting chromosome missegregation can change chromosome number, producing aneuploidy and threatening genome stability. This cause-and-effect relationship makes attachment and assembly important mechanistic points for interpreting abnormal division, rather than treating aneuploidy as an isolated chromosome-counting problem.
Studies of centromere function connect molecular events at centromeric chromatin and the kinetochore with genome stability at the whole-cell level. By examining whether attachment, checkpoint signaling, and chromatid movement remain coordinated, researchers can relate local chromosome behavior to accurate inheritance. This framework is useful for understanding how division errors arise and why chromosome number can become abnormal.
The topic matters across these fields because chromosome inheritance is central to cell division, and centromere defects can cause missegregation and aneuploidy. In cancer research, it helps frame genome instability; in development and reproductive biology, it provides context for chromosome-distribution problems. These connections make centromeres a bridge between cell biology mechanisms and chromosomal disorders.