Subtopic Deep Dive
Kinetochore-Microtubule Attachments
Research Guide
What is Kinetochore-Microtubule Attachments?
Kinetochore-microtubule attachments are dynamic interfaces where kinetochores capture spindle microtubules to ensure bipolar chromosome attachment during mitosis.
These attachments undergo error correction and stabilization regulated by tension-dependent Aurora B kinase activity (Hauf et al., 2003). The spindle assembly checkpoint monitors unattached kinetochores to prevent anaphase onset (Chen et al., 1996). Over 10 papers from the list address phosphorylation and checkpoint mechanisms, with Hauf et al. (2003) cited 1151 times.
Why It Matters
Defects in kinetochore-microtubule attachments cause aneuploidy and cancer, as improper segregation leads to genomic instability (Cleveland et al., 2003). Hesperadin inhibition of Aurora B disrupts attachment error correction and checkpoint maintenance, highlighting therapeutic targets (Hauf et al., 2003). Phosphorylation atlases reveal mitotic regulation sites for drug design (Dephoure et al., 2008).
Key Research Challenges
Tension Sensing Mechanisms
Quantifying how inter-kinetochore tension stabilizes attachments remains unresolved. Aurora B detaches low-tension attachments, but exact spatial gradients are unclear (Hauf et al., 2003). Modeling requires integrating phosphorylation dynamics (Dephoure et al., 2008).
Error Correction Dynamics
Real-time tracking of attachment turnover during prometaphase is technically challenging. Checkpoint components like MAD2 localize to unattached kinetochores, delaying anaphase (Chen et al., 1996). Inhibitors like Hesperadin reveal correction roles but lack kinetic models (Hauf et al., 2003).
Phosphorylation Site Mapping
Identifying Aurora B substrates at kinetochores needs high-resolution proteomics. Mitotic phosphorylation atlas covers thousands of sites, but kinetochore-specific validation lags (Dephoure et al., 2008). Spatial checkpoint regulation adds complexity (Esposito Verza and Salmon, 2007).
Essential Papers
The spindle-assembly checkpoint in space and time
Arianna Esposito Verza, Edward D. Salmon · 2007 · Nature Reviews Molecular Cell Biology · 2.2K citations
A quantitative atlas of mitotic phosphorylation
Noah Dephoure, Chunshui Zhou, Judit Villén et al. · 2008 · Proceedings of the National Academy of Sciences · 1.6K citations
The eukaryotic cell division cycle is characterized by a sequence of orderly and highly regulated events resulting in the duplication and separation of all cellular material into two newly formed d...
The small molecule Hesperadin reveals a role for Aurora B in correcting kinetochore–microtubule attachment and in maintaining the spindle assembly checkpoint
Silke Hauf, Richard W. Cole, Sabrina LaTerra et al. · 2003 · The Journal of Cell Biology · 1.2K citations
The proper segregation of sister chromatids in mitosis depends on bipolar attachment of all chromosomes to the mitotic spindle. We have identified the small molecule Hesperadin as an inhibitor of c...
Centromeres and Kinetochores
Don W. Cleveland, Yinghui Mao, Kevin F. Sullivan · 2003 · Cell · 982 citations
Meiotic chromosomes: it takes two to tango
G. Shirleen Roeder · 1997 · Genes & Development · 808 citations
Meiosis is a special type of cell division that produces haploid gametes from diploid parental cells. Chromosome number is reduced during meiosis because a single round of DNA replication is follow...
Association of Spindle Assembly Checkpoint Component XMAD2 with Unattached Kinetochores
Rey‐Huei Chen, Jennifer Waters, Edward D. Salmon et al. · 1996 · Science · 786 citations
The spindle assembly checkpoint delays anaphase until all chromosomes are attached to a mitotic spindle. The mad (mitotic arrest-deficient) and bub (budding uninhibited by benzimidazole) mutants of...
The Spindle Assembly Checkpoint
Pablo Lara-González, Frederick G. Westhorpe, Stephen S. Taylor · 2012 · Current Biology · 764 citations
Reading Guide
Foundational Papers
Start with Hauf et al. (2003) for Aurora B's role in error correction via Hesperadin; then Esposito Verza and Salmon (2007) for checkpoint overview; Cleveland et al. (2003) for kinetochore structure.
Recent Advances
Dephoure et al. (2008) provides phosphorylation atlas essential for substrate analysis; Lara-González et al. (2012) updates checkpoint mechanisms.
Core Methods
Aurora B inhibition (Hesperadin, Hauf et al., 2003); MAD2 localization imaging (Chen et al., 1996); mass spectrometry phosphoproteomics (Dephoure et al., 2008).
How PapersFlow Helps You Research Kinetochore-Microtubule Attachments
Discover & Search
Research Agent uses searchPapers and citationGraph on 'Hauf et al. 2003 Hesperadin Aurora B' to map 15+ citing papers on attachment correction, then exaSearch for tension models citing Dephoure et al. (2008). findSimilarPapers expands to checkpoint dynamics from Chen et al. (1996).
Analyze & Verify
Analysis Agent applies readPaperContent to Hauf et al. (2003) abstracts, verifying Aurora B's error correction role with verifyResponse (CoVe) against 5 citing papers. runPythonAnalysis plots phosphorylation site frequencies from Dephoure et al. (2008) data via pandas, graded by GRADE for statistical significance in kinetochore substrates.
Synthesize & Write
Synthesis Agent detects gaps in tension-dependent models post-Hauf et al. (2003), flagging contradictions with checkpoint papers. Writing Agent uses latexEditText for attachment diagrams, latexSyncCitations with 10 papers, and latexCompile for review-ready manuscript; exportMermaid visualizes Aurora B feedback loops.
Use Cases
"Extract microtubule attachment rates from Hauf 2003 and plot vs tension"
Analysis Agent → readPaperContent (Hauf et al., 2003) → runPythonAnalysis (pandas/matplotlib for rate curves) → matplotlib plot of Hesperadin effects on detachment kinetics.
"Write LaTeX review section on Aurora B phosphorylation in attachments"
Synthesis Agent → gap detection (post-Dephoure 2008) → Writing Agent → latexEditText (draft) → latexSyncCitations (Hauf/Dephoure) → latexCompile → PDF with inline citations.
"Find GitHub repos modeling kinetochore attachments from recent papers"
Research Agent → paperExtractUrls (Chen et al., 1996) → paperFindGithubRepo → githubRepoInspect → curated list of 3 simulation codes for spindle checkpoint dynamics.
Automated Workflows
Deep Research workflow scans 50+ papers via citationGraph from Hauf et al. (2003), generating structured report on attachment maturation with GRADE-verified claims. DeepScan applies 7-step CoVe to verify tension models against Dephoure et al. (2008) phosphorylation data. Theorizer builds Aurora B feedback hypotheses from checkpoint literature (Esposito Verza and Salmon, 2007).
Frequently Asked Questions
What defines kinetochore-microtubule attachments?
Dynamic plus-end captures by kinetochores form initial attachments, maturing to stable end-on bipolar links under tension, regulated by Aurora B (Hauf et al., 2003).
What methods study these attachments?
Small-molecule inhibitors like Hesperadin block Aurora B to observe error correction; live-cell imaging tracks MAD2 at unattached kinetochores (Chen et al., 1996; Hauf et al., 2003).
What are key papers?
Hauf et al. (2003, 1151 citations) shows Aurora B corrects attachments; Dephoure et al. (2008, 1613 citations) maps mitotic phosphorylation; Esposito Verza and Salmon (2007, 2188 citations) reviews checkpoint spatial dynamics.
What open problems exist?
Kinetic rates of tension-dependent detachment and full Aurora B substrate maps at kinetochores remain unresolved, limiting predictive models (Dephoure et al., 2008; Hauf et al., 2003).
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Part of the Microtubule and mitosis dynamics Research Guide