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14-3-3 protein interactions
Research Guide
What is 14-3-3 protein interactions?
14-3-3 protein interactions refer to the binding of 14-3-3 proteins to phosphorylated serine or threonine residues on partner proteins, modulating diverse cellular processes including cell signaling, apoptosis, and protein stabilization.
The field encompasses 19,820 papers on the structure, function, and regulation of 14-3-3 proteins in processes such as cell signaling, cancer development, phosphorylation-mediated events, protein-protein interactions, apoptosis regulation, neurological disorders, cell cycle control, and protein stabilization as molecular chaperones. Zha et al. (1996) demonstrated that serine phosphorylation of the death agonist BAD leads to its binding to 14-3-3 proteins rather than BCL-XL, preventing apoptosis in response to survival factors. Pawson and Scott (1997) described 14-3-3 proteins as scaffold, anchoring, and adaptor proteins that relay extracellular signals by altering phosphorylation states of target proteins.
Topic Hierarchy
Research Sub-Topics
14-3-3 Protein Phosphorylation Binding
This sub-topic explores how 14-3-3 proteins recognize and bind phosphorylated serine/threonine motifs on client proteins, regulating signaling pathways. Researchers use structural biology, mutagenesis, and peptide arrays to map binding specificity and dynamics.
14-3-3 Proteins in Apoptosis Regulation
Investigations focus on 14-3-3's role in sequestering pro-apoptotic proteins like BAD upon phosphorylation, modulating cell survival. Studies employ knockout models, inhibitors, and proteomics to dissect anti-apoptotic mechanisms.
14-3-3 Interactions in Cell Cycle Control
This area examines 14-3-3 binding to cyclin-dependent kinases and checkpoint proteins to regulate G2/M progression and DNA damage responses. Research integrates live-cell imaging, mass spectrometry, and yeast two-hybrid screens.
14-3-3 Proteins as Chaperones
Researchers study the partial chaperone activity of 14-3-3 in preventing client protein aggregation and aiding folding under stress. Biochemical assays and client protein interaction maps reveal stabilization mechanisms.
14-3-3 in Neurological Disorders
This sub-topic covers 14-3-3 dysregulation in tauopathies, Parkinson's, and schizophrenia, including isoform-specific roles in neuronal signaling. Human postmortem, animal models, and biomarker studies predominate.
Why It Matters
14-3-3 protein interactions regulate key pathways implicated in cancer and neurological disorders. In apoptosis control, Zha et al. (1996) showed that phosphorylation of BAD at serine residues promotes its sequestration by 14-3-3 proteins, inhibiting cell death and contributing to cancer cell survival mechanisms. Pawson and Scott (1997) highlighted their role in signaling scaffolds that propagate signals from the plasma membrane intracellularly via phosphorylation changes. In neurodegeneration, these interactions influence tau protein phosphorylation and aggregation, as noted in studies of related signaling cascades. Their involvement in RAF-ERK pathway activation by B-RAF mutations, per Wan et al. (2004), underscores therapeutic targeting potential in oncology, with over 19,820 works documenting impacts across cell cycle control and protein stabilization.
Reading Guide
Where to Start
"Serine Phosphorylation of Death Agonist BAD in Response to Survival Factor Results in Binding to 14-3-3 Not BCL-XL" (1996) by Zha et al., as it provides a foundational example of phosphorylation-dependent 14-3-3 binding in apoptosis regulation, with clear mechanistic insights accessible to newcomers.
Key Papers Explained
Zha et al. (1996) "Serine Phosphorylation of Death Agonist BAD..." establishes the core binding mechanism where phosphorylated BAD sequesters to 14-3-3, inhibiting apoptosis; Pawson and Scott (1997) "Signaling Through Scaffold, Anchoring, and Adaptor Proteins" builds on this by framing 14-3-3 as signaling adaptors propagating phosphorylation signals intracellularly; Wan et al. (2004) "Mechanism of Activation of the RAF-ERK Signaling Pathway..." extends to oncogenic contexts, showing B-RAF mutations enhance related pathway interactions; Gwinn et al. (2008) "AMPK Phosphorylation of Raptor..." connects to metabolic regulation potentially intersecting 14-3-3 scaffolds.
Paper Timeline
Most-cited paper highlighted in red. Papers ordered chronologically.
Advanced Directions
Research continues on 14-3-3 roles in kinase selectivity and scaffold dynamics, as probed in Davis et al. (2011) "Comprehensive analysis of kinase inhibitor selectivity." No recent preprints or news from the last 12 months indicate steady progress in phosphorylation-mediated interactions without major shifts.
Papers at a Glance
| # | Paper | Year | Venue | Citations | Open Access |
|---|---|---|---|---|---|
| 1 | AMPK Phosphorylation of Raptor Mediates a Metabolic Checkpoint | 2008 | Molecular Cell | 3.7K | ✓ |
| 2 | Promotion of microtubule assembly in vitro by taxol | 1979 | Nature | 3.6K | ✕ |
| 3 | Mechanism of Activation of the RAF-ERK Signaling Pathway by On... | 2004 | Cell | 2.8K | ✓ |
| 4 | Serine Phosphorylation of Death Agonist BAD in Response to Sur... | 1996 | Cell | 2.6K | ✓ |
| 5 | Signaling—2000 and Beyond | 2000 | Cell | 2.6K | ✓ |
| 6 | Comprehensive analysis of kinase inhibitor selectivity | 2011 | Nature Biotechnology | 2.3K | ✓ |
| 7 | Signaling Through Scaffold, Anchoring, and Adaptor Proteins | 1997 | Science | 2.3K | ✕ |
| 8 | Tau protein isoforms, phosphorylation and role in neurodegener... | 2000 | Brain Research Reviews | 2.0K | ✕ |
| 9 | Deficiency of presenilin-1 inhibits the normal cleavage of amy... | 1998 | Nature | 1.8K | ✕ |
| 10 | Signal Transduction through MAP Kinase Cascades | 1998 | Advances in cancer res... | 1.8K | ✕ |
Frequently Asked Questions
What role do 14-3-3 proteins play in apoptosis regulation?
14-3-3 proteins bind phosphorylated BAD, sequestering it from mitochondria and preventing apoptosis. Zha et al. (1996) found that survival factors induce serine phosphorylation of BAD, resulting in 14-3-3 binding rather than BCL-XL association. This mechanism promotes cell survival in response to growth signals.
How do 14-3-3 proteins function in cell signaling?
14-3-3 proteins act as scaffolds, anchors, and adaptors that relay extracellular signals by modulating phosphorylation of target proteins. Pawson and Scott (1997) explained that they facilitate signal transduction from the plasma membrane to intracellular sites through serine or threonine phosphorylation changes. This enables precise regulation of pathways like RAF-ERK signaling.
What is the connection between 14-3-3 interactions and cancer?
14-3-3 proteins mediate oncogenic signaling, such as in B-RAF mutant activation of the RAF-ERK pathway. Wan et al. (2004) detailed how oncogenic B-RAF mutations enhance interactions leading to constitutive ERK signaling, driving cancer development. They also regulate metabolic checkpoints via AMPK phosphorylation, as in Gwinn et al. (2008).
How do 14-3-3 proteins recognize partner proteins?
14-3-3 proteins bind specific phosphoserine or phosphothreonine motifs on partner proteins. Zha et al. (1996) showed BAD phosphorylation at serine sites creates a high-affinity 14-3-3 binding site. This phosphorylation-dependent interaction stabilizes proteins and alters their localization or activity.
What is the current scale of research on 14-3-3 protein interactions?
The field includes 19,820 published works focused on 14-3-3 structure, function, and regulation. Studies span cell signaling, cancer, phosphorylation processes, and neurological disorders. Growth data over the past five years is not available.
Open Research Questions
- ? How do 14-3-3 proteins selectively distinguish between closely related phosphomotifs in signaling scaffolds?
- ? What are the structural dynamics of 14-3-3 dimers during binding to BAD versus other apoptosis regulators?
- ? In what ways do 14-3-3 interactions integrate metabolic checkpoints like AMPK-Raptor with RAF-ERK oncogenic signaling?
- ? How do phosphorylation patterns on tau protein modulate 14-3-3 binding in neurodegenerative contexts?
- ? What mechanisms allow 14-3-3 proteins to function as molecular chaperones in diverse protein stabilization pathways?
Recent Trends
The field maintains 19,820 works with no specified five-year growth rate available.
High-citation papers like Zha et al. and Pawson and Scott (1997) continue to anchor studies on phosphorylation-dependent binding and signaling scaffolds.
1996Absence of recent preprints or news in the last 12 months suggests stable focus on established mechanisms in cancer and apoptosis.
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