Abstract
The expression of genes encoding patatin, a major tuber protein, is highly tissue-specific but is also modulated by exogenous sucrose. The patterns of transcription observed in potato plants could be due to mechanisms conferring tuber-specificity or they could reflect the concentrations of sucrose found in different tissues. To distinguish between these possibilities, a detailed examination was made of the function of a region of the promoter previously implicated in conferring tissue-specific and sucrose-inducible expression. Internal deletions of this region revealed three separate functional domains regulating expression. The B repeat region acted as a positive activator of transcription in the tuber and was also responsible for a degree of sucrose-inducibility. The distal region of the A repeat repressed transcription in leaf and tuber tissue, while the proximal region of the A repeat was able to confer sucrose-responsiveness. Each of these regions specifically bound nuclear proteins which may be putative transcription factors involved in conferring these responses. The region found to confer sucrose-inducible expression was conserved among some other genes that are also regulated by exogenous sucrose.
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Claims 6
Claim · model-written summary
The B repeat region acted as a positive activator of transcription in the potato tuber.
- Taxon
- potato
Solanum tuberosumt0 - Organ / stage
- tubere1
- Treatment
- Internal deletionse0
- Gene
- B repeat regione1
- Outcome
- transcription in the tubere1
- Direction
- increaseinferrede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“potato tuber storage protein gene”
e0“Internal deletions of this region revealed three separate functional domains regulating expression”
e1“The B repeat region acted as a positive activator of transcription in the tuber”
Claim · model-written summary
The B repeat region was responsible for a degree of sucrose-inducibility of expression.
- Taxon
- potatoSolanum tuberosumt0
- Gene
- B repeat regione2
- Compound
- sucrosee2
- Outcome
- sucrose-inducibilitye2
- Direction
- increaseinferrede2
- Qualifier
- a degree ofe2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“potato tuber storage protein gene”
e2“The B repeat region acted as a positive activator of transcription in the tuber and was also responsible for a degree of sucrose-inducibility”
Claim · model-written summary
The distal region of the A repeat repressed transcription in leaf and tuber tissue.
- Taxon
- potatoSolanum tuberosumt0
- Organ / stage
- leaf and tuber tissuee3
- Treatment
- Internal deletionse0
- Gene
- distal region of the A repeate3
- Outcome
- transcription in leaf and tuber tissuee3
- Direction
- repressede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“potato tuber storage protein gene”
e0“Internal deletions of this region revealed three separate functional domains regulating expression”
e3“The distal region of the A repeat repressed transcription in leaf and tuber tissue”
Claim · model-written summary
The proximal region of the A repeat conferred sucrose-responsiveness.
- Taxon
- potatoSolanum tuberosumt0
- Gene
- proximal region of the A repeate4
- Compound
- sucrosee4
- Outcome
- sucrose-responsivenesse4
- Direction
- increaseinferrede4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“potato tuber storage protein gene”
e4“the proximal region of the A repeat was able to confer sucrose-responsiveness”
Claim · model-written summary
Each of the three regions specifically bound nuclear proteins.
- Taxon
- potatoSolanum tuberosumt0
- Outcome
- bound nuclear proteinse5
- Qualifier
- putative transcription factorse5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“potato tuber storage protein gene”
e5“Each of these regions specifically bound nuclear proteins which may be putative transcription factors involved in conferring these responses”
Claim · model-written summary
The region conferring sucrose-inducible expression was conserved among some other sucrose-regulated genes.
- Taxon
- potatoSolanum tuberosumt0
- Compound
- sucrosee6
- Outcome
- was conserved among some other genese6
- Qualifier
- some other genes that are also regulated by exogenous sucrosee6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“potato tuber storage protein gene”
e6“The region found to confer sucrose-inducible expression was conserved among some other genes that are also regulated by exogenous sucrose”
The same questions in other papers
loss of function · molecular: expression · Solanum tuberosum (potato)Positive and negative results
5 papers in the same direction as this paper · 11 in the opposite direction
- negative
- negative
- negative
13 papers more in this group
See all 17 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.