Evidence map›Paper›PMID 9484462›Full record

ArticlePlant molecular biology1998

Prosystemin from potato, black nightshade, and bell pepper: primary structure and biological activity of predicted systemin polypeptides.

C P Constabel, L Yip, C A Ryan

Abstract readComparative Study
PubMed Publisher
In one paragraph

Article in Plant molecular biology, 1998. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 42 papers.

0numbers the graph read from it
0cells of the map it votes in
42citing papers in PubMed
2.9field-weighted citation impact, top 9% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

42 citing papers in PubMed, 137 citations in OpenAlex.

  1. Article
  2. Plant subtilases as key initiators of peptide ligand-receptor signaling.The Plant journal : for cell and molecular biology · 2026
    Review
  3. Peptide hormones in plants.Molecular horticulture · 2025
    Review
  4. Review
  5. Article
  6. Review
  7. Article
  8. Review
  9. Article
  10. Review
  11. Review
  12. Review
  13. Article
  14. Article
  15. Article
  16. Article
  17. Article
  18. Article
  19. Article
  20. Review
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

3 authors at 1 institution in 1 country.

C P ConstabelInstitute of Biological Chemistry, Washington State University, Pullman 99164-6340, USA.
L Yip
C A Ryan
Washington State University · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Prosystemin is the precursor protein of the 18 amino acid wound signal systemin which activates systemic defense in tomato leaves against insect herbivores (McGurl B, Pearce G, Orozco-Cardenas M, Ryan CA, Science 255 (1992) 1570-1573). Here, we report the isolation of cDNA sequences encoding prosystemin from potato (Solanum tuberosum), black nightshade (S. nigrum), and bell pepper (Capsicum annuum), all members of the Solanaceae family, using reverse-transcription polymerase chain reaction (RT-PCR). Pairwise comparisons of the predicted prosystemin proteins from the three species with tomato prosystemin and among each other indicated sequence identities ranging from 73% to 88%. The deduced systemin polypeptides were synthesized and tested for their capacities to induce the synthesis of the defensive proteinase inhibitors in tomato leaves. Potato and pepper systemins were approximately as active as tomato systemin, whereas nightshade systemin was ten-fold less active. The accumulation of proteinase inhibitor mRNA transcripts could be induced in each of these plants by treatment with the homologous systemin. As in the tomato, in potato, black nightshade, and bell pepper plants, prosystemin homologs appear to function as precursors of systemic wound signals.

Indexed as

Plants, MedicinalPlants, ToxicAmino Acid SequenceAtropa belladonnaDNA, ComplementaryMolecular Sequence DataPeptidesPlant ProteinsPolymerase Chain ReactionProtease InhibitorsRecombinant ProteinsSequence AlignmentSequence Homology, Amino AcidSolanum lycopersicumSolanum tuberosumTranscription, GeneticDNA, ComplementaryPeptidesPlant Proteinsprosystemin protein, Lycopersicon esculentumProtease InhibitorsRecombinant Proteinssystemin

Identifiers

PMID9484462
OpenAlexW1518032823

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.