How do proteins find plasmodesmata?
PDLP1 is a type I membrane protein targeted to plasmodesmata; altering PDLP dosage changes GFP cell-to-cell trafficking.
Source
Specific targeting of a plasmodesmal protein affecting cell-to-cell communication
Study at a glance
- Design
- Animal / in-vitro — GFP localization and topology/knockout assays of PDLP plasmodesmal proteins
- N
- Plant cell-biology localization and trafficking assays — no single sample N
- Population
- Arabidopsis and other plants expressing PDLP family proteins
- Outcome
- Plasmodesmal targeting of PDLPs and effects on cell-to-cell GFP movement
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Inspect source passages
How do proteins find plasmodesmata?
These passages occur verbatim in the stored paper text. They support the points listed below; they do not verify every statement in the explanation.
What are plasmodesmata?
Plasmodesmata are channels that cross the cell wall and establish symplastic continuity throughout most of the plant.
Why do plasmodesmata matter?
intercellular macromolecular communication through plasmodesmata.
What they did
GFP-tagged cell-wall membrane proteins from Arabidopsis proteomes were localized across plant species; PDLP topology and knockout trafficking phenotypes were tested.
What they found
PDLP1 family proteins target plasmodesmata; PDLP1a has cytoplasmic C-tail and apoplastic DUF26 domains; combined KOs increase GFP movement.
The limits
What it doesn't show
Does not fully catalog every plasmodesmal protein or all cargoes regulated by PDLPs.
Key terms
- Plasmodesmata
- Cell-wall channels enabling plant symplastic continuity.
- PDLP1
- Plasmodesmata-located protein family member.
- Symplast
- Cytoplasmic continuum connected through plasmodesmata.
- Non-cell-autonomous
- Function in cells other than where a molecule was produced.
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Plasmodesmata are:
Common questions
What are plasmodesmata?
Channels crossing cell walls for intercellular communication.
PDLP1a topology?
Type I membrane protein: cytoplasmic C-tail, apoplastic DUF26.
KO phenotype?
Combined KOs increase GFP movement.
Why hard to study?
Embedded in rigid walls—hard to purify.
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