Evidence map›Paper›PMID 34163831›Full record

ArticleChemical science2021

Observation of liquid-liquid phase separation of ataxin-3 and quantitative evaluation of its concentration in a single droplet using Raman microscopy.

Kazuki Murakami, Shinji Kajimoto, Daiki Shibata, Kunisato Kuroi, Fumihiko Fujii, Takakazu Nakabayashi

Open access · diamondAbstract read
In one paragraph

Article in Chemical science, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers.

0numbers the graph read from it
0cells of the map it votes in
23citing papers in PubMed
3.8field-weighted citation impact, top 5% 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

23 citing papers in PubMed, 64 citations in OpenAlex.

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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

6 authors at 2 institutions in 2 countries.

Kazuki MurakamiGraduate School of Pharmaceutical Sciences, Tohoku University Aoba-ku Sendai 980-8578 Japan takakazu.nakabayashi.e7@tohoku.ac.jp.ORCID https://orcid.org/0000-0002-0036-1151
Shinji KajimotoGraduate School of Pharmaceutical Sciences, Tohoku University Aoba-ku Sendai 980-8578 Japan takakazu.nakabayashi.e7@tohoku.ac.jp.ORCID https://orcid.org/0000-0001-7432-8090
Daiki ShibataGraduate School of Pharmaceutical Sciences, Tohoku University Aoba-ku Sendai 980-8578 Japan takakazu.nakabayashi.e7@tohoku.ac.jp.ORCID https://orcid.org/0000-0001-5451-331X
Kunisato KuroiFaculty of Pharmaceutical Sciences, Kobe Gakuin University 1-1-3 Minatojima, Chuo-ku Kobe 650-8586 Japan.ORCID https://orcid.org/0000-0002-5889-2334
Fumihiko FujiiFaculty of Pharmaceutical Sciences, Kobe Gakuin University 1-1-3 Minatojima, Chuo-ku Kobe 650-8586 Japan.ORCID https://orcid.org/0000-0001-8382-8919
Takakazu NakabayashiGraduate School of Pharmaceutical Sciences, Tohoku University Aoba-ku Sendai 980-8578 Japan takakazu.nakabayashi.e7@tohoku.ac.jp.ORCID https://orcid.org/0000-0003-2942-2189
Sendai University · JPKobe Gakuin University · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Liquid-liquid phase separation (LLPS) plays an important role in a variety of biological processes and is also associated with protein aggregation in neurodegenerative diseases. Quantification of LLPS is necessary to elucidate the mechanism of LLPS and the subsequent aggregation process. In this study, we showed that ataxin-3, which is associated with Machado-Joseph disease, exhibits LLPS in an intracellular crowding environment mimicked by biopolymers, and proposed that a single droplet formed in LLPS can be quantified using Raman microscopy in a label-free manner. We succeeded in evaluating the protein concentration and identifying the components present inside and outside a droplet using the O-H stretching band of water as an internal intensity standard. Only water and protein were detected to be present inside droplets with crowding agents remaining outside. The protein concentration in a droplet was dependent on the crowding environment, indicating that the protein concentration and intracellular environment should be considered when investigating LLPS. Raman microscopy has the potential to become a powerful technique for clarifying the chemical nature of LLPS and its relationship with protein aggregation.

Identifiers

PMID34163831
PMCPMC8171347
OpenAlexW3155860739

What OpenQuestion holds

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Registered trials

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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.