Evidence map›Paper›PMID 28832627›Full record

ArticlePloS one2017

Analysis of repetitive amino acid motifs reveals the essential features of spider dragline silk proteins.

Ali D Malay, Kazuharu Arakawa, Keiji Numata

Open access · goldAbstract read
In one paragraph

Article in PloS one, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 29 papers.

0numbers the graph read from it
0cells of the map it votes in
29citing papers in PubMed
2.2field-weighted citation impact, top 13% 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

29 citing papers in PubMed, 84 citations in OpenAlex.

  1. Design and Heterologous Production of Bagworm Silk-Inspired Proteins inComputational and structural biotechnology journal · 2026
    Article
  2. Spider silk-based structural proteins as tough, biodegradable, and sustainable polymers.Proceedings of the Japan Academy. Series B, Physical and biological sciences · 2026
    Review
  3. Nanostructured Protein Surfaces Inspired by Spider Silk.Advanced materials (Deerfield Beach, Fla.) · 2025
    Review
  4. Article
  5. Review
  6. Review
  7. Review
  8. Review
  9. Article
  10. Article
  11. Relating spidroin motif prevalence and periodicity to the mechanical properties of major ampullate spider silks.Journal of comparative physiology. B, Biochemical, systemic, and environmental physiology · 2023
    Article
  12. Article
  13. Article
  14. Review
  15. Article
  16. Article
  17. Complexity of Spider Dragline Silk.Biomacromolecules · 2022
    Review
  18. Article
  19. Article
  20. Article
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 2 institutions in 1 country.

Ali D MalayEnzyme Research Team, Center for Sustainable Resource Science, RIKEN, Wako-shi, Saitama, Japan.ORCID http://orcid.org/0000-0003-0885-5524
Kazuharu ArakawaInstitute for Advanced Biosciences, Keio University, Kakuganji, Tsuruoka, Yamagata, Japan.
Keiji NumataEnzyme Research Team, Center for Sustainable Resource Science, RIKEN, Wako-shi, Saitama, Japan.
RIKEN Center for Sustainable Resource Science · JPKeio University · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The extraordinary mechanical properties of spider dragline silk are dependent on the highly repetitive sequences of the component proteins, major ampullate spidroin 1 and 2 (MaSp2 and MaSp2). MaSp sequences are dominated by repetitive modules composed of short amino acid motifs; however, the patterns of motif conservation through evolution and their relevance to silk characteristics are not well understood. We performed a systematic analysis of MaSp sequences encompassing infraorder Araneomorphae based on the conservation of explicitly defined motifs, with the aim of elucidating the essential elements of MaSp1 and MaSp2. The results show that the GGY motif is nearly ubiquitous in the two types of MaSp, while MaSp2 is invariably associated with GP and di-glutamine (QQ) motifs. Further analysis revealed an extended MaSp2 consensus sequence in family Araneidae, with implications for the classification of the archetypal spidroins ADF3 and ADF4. Additionally, the analysis of RNA-seq data showed the expression of a set of distinct MaSp-like variants in genus Tetragnatha. Finally, an apparent association was uncovered between web architecture and the abundance of GP, QQ, and GGY motifs in MaSp2, which suggests a co-expansion of these motifs in response to the evolution of spiders' prey capture strategy.

Indexed as

Amino Acid MotifsAmino Acid SequenceAnimalsConserved SequenceFibroinsSilkSpidersFibroinsSilkspidroin 1spidroin 2

Identifiers

PMID28832627
PMCPMC5568437
OpenAlexW2749036531

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.