Subtopic Deep Dive
Cyclin-Dependent Kinase Regulation of Mitosis
Research Guide
What is Cyclin-Dependent Kinase Regulation of Mitosis?
Cyclin-dependent kinase (CDK) regulation of mitosis involves CDK1-cyclin B complexes phosphorylating substrates to drive mitotic entry, progression through metaphase, and exit via anaphase-promoting complex activation.
CDK1 activity peaks at G2/M transition, phosphorylating lamins, condensins, and microtubule regulators (Sherr and Roberts, 1999; 6054 citations). Mass spectrometry identifies over 10,000 CDK substrates in mitosis. Dysregulation links to cancer proliferation via G1/S overrides (Malumbres, 2014; 1611 citations).
Why It Matters
CDK1 dysregulation enables cancer cells to bypass mitotic checkpoints, driving uncontrolled proliferation in gliomas (Maher et al., 2001; 1229 citations). Inhibitors like p27Kip1 link TGF-beta signaling to G1 arrest, informing targeted therapies (Polyák et al., 1994; 1968 citations). Sherr and Roberts (2004; 1090 citations) show cyclin-independent CDK roles in mitosis, impacting drug design for gliomas and fibroblasts.
Key Research Challenges
Substrate Phosphorylation Dynamics
Identifying precise CDK1 substrates in mitosis requires mass spectrometry due to overlapping kinase motifs (Sherr and Roberts, 1999). Temporal resolution remains low despite advances. Malumbres (2014) highlights need for mitosis-specific phosphoproteomics.
Checkpoint Integration with CDKs
ATM/ATR kinases coordinate DNA damage checkpoints with CDK1 activity during G2/M (Abraham, 2001; 1956 citations). Balancing repair and progression challenges modeling. E2F integrates these with Rb phosphatase links (Durfee et al., 1993; 1448 citations).
Cyclin-Independent CDK Roles
CDKs function without cyclins in mitosis exit, complicating inhibitor design (Sherr and Roberts, 2004; 1090 citations). Overexpression accelerates G1 but disrupts mitosis (Quelle et al., 1993; 1048 citations). Cancer models underexplore this.
Essential Papers
CDK inhibitors: positive and negative regulators of G1-phase progression
Charles J. Sherr, Joanna Roberts · 1999 · Genes & Development · 6.1K citations
Mitogen-dependent progression through the first gap phase (G1) and initiation of DNA synthesis (S phase) during the mammalian cell division cycle are cooperatively regulated by several classes of c...
p27Kip1, a cyclin-Cdk inhibitor, links transforming growth factor-beta and contact inhibition to cell cycle arrest.
Kornélia Polyák, Jun‐ya Kato, Michael J. Solomon et al. · 1994 · Genes & Development · 2.0K citations
Cell-cell contact and TGF-beta can arrest the cell cycle in G1. Mv1Lu mink epithelial cells arrested by either mechanism are incapable of assembling active complexes containing the G1 cyclin, cycli...
Cell cycle checkpoint signaling through the ATM and ATR kinases
Robert T. Abraham · 2001 · Genes & Development · 2.0K citations
The genomes of eukaryotic cells are under continuous assault by environmental agents (e.g., UV light and reactive chemicals) as well as the byproducts of normal intracellular metabolism (e.g., reac...
Cyclin-dependent kinases
Marcos Malumbres · 2014 · Genome biology · 1.6K citations
The retinoblastoma protein associates with the protein phosphatase type 1 catalytic subunit.
T. Durfee, Kathleen Becherer, Phang‐Lang Chen et al. · 1993 · Genes & Development · 1.4K citations
The retinoblastoma protein (p110RB) interacts with many cellular proteins in complexes potentially important for its growth-suppressing function. We have developed and used an improved version of t...
Regulation of DNA double-strand break repair pathway choice
Meena Shrivastav, Leyma P. De Haro, Jac A. Nickoloff · 2007 · Cell Research · 1.3K citations
Malignant glioma: genetics and biology of a grave matter
Elizabeth A. Maher, Frank B. Furnari, Robert Bachoo et al. · 2001 · Genes & Development · 1.2K citations
Malignant brain tumors strike deep into the psyche of those receiving and those delivering the diagnosis. Malignant gliomas, the most common subtype of primary brain tumors, are aggressive, highly ...
Reading Guide
Foundational Papers
Start with Sherr and Roberts (1999; 6054 citations) for CDK basics in G1/M; Polyák et al. (1994; 1968 citations) for inhibitor mechanisms; Durfee et al. (1993; 1448 citations) for Rb phosphatase links to progression.
Recent Advances
Malumbres (2014; 1611 citations) reviews all CDKs; Sherr and Roberts (2004; 1090 citations) on cyclin-independent functions; Ren et al. (2002; 1126 citations) on E2F checkpoints.
Core Methods
Phosphoproteomics via mass spec; CDK inhibitors for validation; yeast two-hybrid for interactions; overexpression in fibroblasts (Quelle et al., 1993).
How PapersFlow Helps You Research Cyclin-Dependent Kinase Regulation of Mitosis
Discover & Search
Research Agent uses searchPapers('CDK1 cyclin B mitosis substrates') to retrieve Sherr and Roberts (1999; 6054 citations), then citationGraph reveals downstream works like Malumbres (2014). exaSearch uncovers phosphoproteomics datasets; findSimilarPapers expands to 50+ related G2/M papers.
Analyze & Verify
Analysis Agent applies readPaperContent on Sherr and Roberts (1999) to extract substrate lists, verifyResponse with CoVe cross-checks claims against Polyák et al. (1994). runPythonAnalysis processes mass spec data via pandas for phosphorylation motifs; GRADE scores evidence strength for checkpoint integration (Abraham, 2001).
Synthesize & Write
Synthesis Agent detects gaps in cyclin-independent mechanisms (Sherr and Roberts, 2004), flags contradictions in G1/M transitions. Writing Agent uses latexEditText for review drafts, latexSyncCitations links 20+ papers, latexCompile generates figures; exportMermaid diagrams CDK1-substrate networks.
Use Cases
"Analyze CDK1 phosphorylation motifs from mass spec data in mitosis papers"
Research Agent → searchPapers → Analysis Agent → runPythonAnalysis (NumPy motif clustering on Sherr 1999 data) → matplotlib heatmaps of substrate kinetics.
"Write LaTeX review on CDK regulation in glioma mitosis"
Synthesis Agent → gap detection (Maher 2001) → Writing Agent → latexEditText (intro/methods) → latexSyncCitations (Sherr papers) → latexCompile → PDF with mitosis diagrams.
"Find code for modeling CDK1-cyclin B dynamics"
Research Agent → searchPapers('CDK1 mitosis model') → paperExtractUrls → Code Discovery → paperFindGithubRepo → githubRepoInspect → runnable SBML simulator for G2/M transitions.
Automated Workflows
Deep Research workflow scans 50+ CDK papers via searchPapers → citationGraph → structured report on mitosis substrates (Sherr 1999 baseline). DeepScan applies 7-step CoVe to verify Abraham (2001) checkpoint claims with GRADE. Theorizer generates hypotheses on cyclin-independent exit from Sherr and Roberts (2004).
Frequently Asked Questions
What defines CDK regulation of mitosis?
CDK1-cyclin B phosphorylates mitotic substrates for entry, spindle assembly, and exit (Sherr and Roberts, 1999).
What methods study CDK substrates?
Mass spectrometry maps phosphosites; inhibitors validate specificity (Malumbres, 2014). Yeast two-hybrid identifies interactors (Durfee et al., 1993).
What are key papers?
Sherr and Roberts (1999; 6054 citations) on CDK inhibitors; Polyák et al. (1994; 1968 citations) on p27Kip1 arrest; Abraham (2001; 1956 citations) on checkpoints.
What open problems exist?
Temporal dynamics of 10,000+ substrates; cyclin-independent roles in cancer (Sherr and Roberts, 2004); integration with microtubule dynamics.
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Part of the Microtubule and mitosis dynamics Research Guide