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Cellular transport and secretion
Research Guide
What is Cellular transport and secretion?
Cellular transport and secretion encompasses the mechanisms of intracellular membrane trafficking, including endocytosis, vesicle traffic, membrane fusion mediated by Rab and SNARE proteins, ESCRT machinery functions, phosphoinositide roles, and lysosome biogenesis.
This field examines processes such as clathrin-mediated endocytosis, membrane fusion, and the molecular roles of Rab proteins, SNARE proteins, and ESCRT machinery in vesicle trafficking. A total of 77,139 papers address these topics in cell biology. Growth rate over the past 5 years is not available from the data.
Topic Hierarchy
Research Sub-Topics
Clathrin-Mediated Endocytosis
This sub-topic investigates the molecular machinery, adaptor proteins, and regulatory dynamics of clathrin-coated vesicle formation at the plasma membrane. Researchers study cargo selection, dynamin function, and disease implications.
SNARE Proteins in Membrane Fusion
This sub-topic examines SNARE complex assembly, zippering, and regulation in intracellular vesicle fusion events. Researchers explore syntaxin, SNAP-25, and VAMP roles in exocytosis and synaptic transmission.
Rab Proteins in Vesicle Trafficking
This sub-topic covers Rab GTPase localization, effectors, and coordination of directional transport along endocytic and secretory pathways. Researchers analyze Rab conversion cascades and organelle identity.
ESCRT Machinery in Membrane Remodeling
This sub-topic studies ESCRT complexes in multivesicular body formation, cytokinesis, and viral budding through membrane scission. Researchers investigate ubiquitination signals and lipid roles.
Phosphoinositides in Membrane Trafficking
This sub-topic explores PI(4,5)P2, PI(3)P, and other phosphoinositide gradients in recruiting effectors to specific organelles. Researchers examine kinases, phosphatases, and signaling crosstalk.
Why It Matters
Cellular transport and secretion mechanisms underpin essential cellular functions like protein secretion and nutrient uptake, with disruptions linked to diseases. Kuro-o et al. (1997) in "Mutation of the mouse klotho gene leads to a syndrome resembling ageing" showed that klotho gene defects cause ageing-like symptoms including arteriosclerosis and osteoporosis, highlighting transport roles in lifespan regulation with 66,549 citations. Zerial and McBride (2001) in "Rab proteins as membrane organizers" detailed how Rab GTPases organize membrane trafficking, impacting lysosome biogenesis and endocytosis critical for cellular homeostasis.
Reading Guide
Where to Start
"Rab proteins as membrane organizers" by Zerial and McBride (2001) provides a foundational overview of Rab GTPase roles in membrane trafficking, making it ideal for initial reading due to its clear synthesis of vesicle organization principles.
Key Papers Explained
Zerial and McBride (2001) "Rab proteins as membrane organizers" establishes Rab functions in trafficking, which Bourne et al. (1991) "The GTPase superfamily: conserved structure and molecular mechanism" grounds in GTPase mechanics, while Nishita et al. (2017) "Ror2 signaling regulates Golgi structure and transport through IFT20 for tumor invasiveness" applies these to Golgi dynamics. Conner and Schmid (2003) "Regulated portals of entry into the cell" builds on this by detailing endocytosis entry points. Van Meer et al. (2008) "Membrane lipids: where they are and how they behave" connects lipid environments to these protein actions.
Paper Timeline
Most-cited paper highlighted in red. Papers ordered chronologically.
Advanced Directions
Research continues on Rab and SNARE integration in lysosome biogenesis and phosphoinositide signaling, as reflected in the 77,139 papers. Kuro-o et al. (1997) "Mutation of the mouse klotho gene leads to a syndrome resembling ageing" links transport defects to systemic ageing. No recent preprints or news available.
Papers at a Glance
| # | Paper | Year | Venue | Citations | Open Access |
|---|---|---|---|---|---|
| 1 | Mutation of the mouse klotho gene leads to a syndrome resembli... | 1997 | PubMed | 66.5K | ✕ |
| 2 | Ror2 signaling regulates Golgi structure and transport through... | 2017 | Scientific Reports | 15.8K | ✓ |
| 3 | Ultrastructural Characterization of the Lower Motor System in ... | 2016 | Scientific Reports | 13.1K | ✓ |
| 4 | Membrane lipids: where they are and how they behave | 2008 | Nature Reviews Molecul... | 6.9K | ✓ |
| 5 | Short-Term Synaptic Plasticity | 2002 | Annual Review of Physi... | 4.9K | ✕ |
| 6 | Regulated portals of entry into the cell | 2003 | Nature | 3.7K | ✕ |
| 7 | SMART, a simple modular architecture research tool: Identifica... | 1998 | Proceedings of the Nat... | 3.6K | ✓ |
| 8 | Intracellular Aspects of the Process of Protein Synthesis | 1975 | Science | 3.6K | ✕ |
| 9 | The GTPase superfamily: conserved structure and molecular mech... | 1991 | Nature | 3.4K | ✕ |
| 10 | Rab proteins as membrane organizers | 2001 | Nature Reviews Molecul... | 3.3K | ✕ |
Frequently Asked Questions
What role do Rab proteins play in cellular transport?
Rab proteins act as molecular organizers of intracellular membrane trafficking by coordinating vesicle budding, transport, tethering, and fusion. Zerial and McBride (2001) in "Rab proteins as membrane organizers" describe their function in specifying vesicle identity and docking sites. These GTPases are central to endocytosis and lysosome biogenesis.
How does clathrin-mediated endocytosis function?
Clathrin-mediated endocytosis involves the formation of coated vesicles at the plasma membrane for cargo uptake. Conner and Schmid (2003) in "Regulated portals of entry into the cell" outline its regulation as a primary entry pathway. Dynamin and accessory proteins drive vesicle scission in this process.
What is the significance of SNARE proteins in membrane fusion?
SNARE proteins mediate membrane fusion during vesicle trafficking by forming trans-SNARE complexes that bridge membranes. They are essential for exocytosis, endocytosis, and intracellular transport. The field description notes their roles alongside Rab proteins in these mechanisms.
What contributes to lysosome biogenesis?
Lysosome biogenesis involves vesicle traffic and phosphoinositide signaling regulated by Rab proteins and ESCRT machinery. Zerial and McBride (2001) connect Rab functions to lysosomal maturation. These processes ensure lysosomal enzyme delivery and degradation capacity.
How do phosphoinositides influence cellular transport?
Phosphoinositides serve as spatial cues for recruiting trafficking proteins to specific membranes. The field description identifies their impact on endocytosis and vesicle traffic. Van Meer et al. (2008) in "Membrane lipids: where they are and how they behave" discuss lipid behaviors in these contexts.
What is the function of ESCRT machinery?
ESCRT machinery drives membrane remodeling and scission in multivesicular body formation during endocytosis. It is key to lysosomal targeting and membrane trafficking. The description lists it among core components with Rab and SNARE proteins.
Open Research Questions
- ? How do defects in klotho-related transport pathways accelerate ageing phenotypes?
- ? In what ways does Ror2 signaling via IFT20 alter Golgi structure to promote tumor invasiveness?
- ? How do Rab proteins precisely coordinate sequential steps in vesicle tethering and fusion?
- ? What ultrastructural changes in motor neurons arise from transport disruptions in Krabbe disease?
- ? How do membrane lipid compositions dynamically regulate SNARE-mediated fusion events?
Recent Trends
The field maintains 77,139 papers with no specified 5-year growth rate.
Citations highlight persistent focus on Rab proteins (Zerial and McBride, 2001, 3336 citations) and ageing-linked transport (Kuro-o et al., 1997, 66549 citations).
No recent preprints or news reported.
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