Evidence map›Paper›PMID 29844455›Full record

ArticleScientific reports2018

Oligomeric states of microbial rhodopsins determined by high-speed atomic force microscopy and circular dichroic spectroscopy.

Mikihiro Shibata, Keiichi Inoue, Kento Ikeda, Masae Konno, Manish Singh, Chihiro Kataoka, Rei Abe-Yoshizumi, Hideki Kandori, Takayuki Uchihashi

Open access · goldAbstract read
In one paragraph

Article in Scientific reports, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 53 papers.

0numbers the graph read from it
0cells of the map it votes in
53citing papers in PubMed
4.8field-weighted citation impact, top 4% 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

53 citing papers in PubMed, 92 citations in OpenAlex.

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  16. Potassium-selective channelrhodopsins.Biophysics and physicobiology · 2023
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  17. Protein dynamics of a light-driven NaBiophysics and physicobiology · 2023
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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

9 authors at 3 institutions in 1 country.

Mikihiro ShibataNano Life Science Institute (WPI-NanoLSI), Kanazawa University, Kanazawa, 920-1192, Japan.
Keiichi InoueDepartment of Life Science and Applied Chemistry, Nagoya Institute of Technology, Nagoya, 464-8555, Japan.
Kento IkedaSchool of Mathematical and Physical Sciences, Graduate School of Natural Science & Technology, Kanazawa University, Kanazawa, 920-1192, Japan.
Masae KonnoDepartment of Life Science and Applied Chemistry, Nagoya Institute of Technology, Nagoya, 464-8555, Japan.
Manish SinghDepartment of Life Science and Applied Chemistry, Nagoya Institute of Technology, Nagoya, 464-8555, Japan.
Chihiro KataokaDepartment of Life Science and Applied Chemistry, Nagoya Institute of Technology, Nagoya, 464-8555, Japan.
Rei Abe-YoshizumiDepartment of Life Science and Applied Chemistry, Nagoya Institute of Technology, Nagoya, 464-8555, Japan.
Hideki KandoriDepartment of Life Science and Applied Chemistry, Nagoya Institute of Technology, Nagoya, 464-8555, Japan. kandori@nitech.ac.jp.ORCID 0000-0002-4922-1344
Takayuki UchihashiDepartment of Physics, Nagoya University, Nagoya, 464-8602, Japan. uchihast@d.phys.nagoya-u.ac.jp.ORCID 0000-0002-0263-5312
Nagoya Institute of Technology · JPKanazawa University · JPJapan Science and Technology Agency · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Oligomeric assembly is a common feature of membrane proteins and often relevant to their physiological functions. Determining the stoichiometry and the oligomeric state of membrane proteins in a lipid bilayer is generally challenging because of their large size, complexity, and structural alterations under experimental conditions. Here, we use high-speed atomic force microscopy (HS-AFM) to directly observe the oligomeric states in the lipid membrane of various microbial rhodopsins found within eubacteria to archaea. HS-AFM images show that eubacterial rhodopsins predominantly exist as pentamer forms, while archaeal rhodopsins are trimers in the lipid membrane. In addition, circular dichroism (CD) spectroscopy reveals that pentameric rhodopsins display inverted CD couplets compared to those of trimeric rhodopsins, indicating different types of exciton coupling of the retinal chromophore in each oligomer. The results clearly demonstrate that the stoichiometry of the fundamental oligomer of microbial rhodopsins strongly correlate with the phylogenetic tree, providing a new insight into the relationship between the oligomeric structure and function-structural evolution of microbial rhodopsins.

Indexed as

ArchaeaBacteriaBiological EvolutionCircular DichroismLipid BilayersMicroscopy, Atomic ForcePhylogenyProtein MultimerizationRhodopsins, MicrobialSpectrum AnalysisStructure-Activity RelationshipLipid BilayersRhodopsins, Microbial

Identifiers

PMID29844455
PMCPMC5974397
OpenAlexW2807649489

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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.