Jove
Visualize
お問い合わせ
JoVE
x logofacebook logolinkedin logoyoutube logo
JoVEについて
概要リーダーシップブログJoVEヘルプセンター
著者向け
出版プロセス編集委員会範囲と方針査読よくある質問投稿
図書館員向け
推薦の声購読アクセスリソース図書館諮問委員会よくある質問
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experimentsアーカイブ
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教員リソースセンター教員サイト
利用規約
プライバシーポリシー
ポリシー

関連する概念動画

Channel Rhodopsins01:11

Channel Rhodopsins

3.1K
Most organisms use photoreceptors to sense and respond to light. Examples of photoreceptors include bacteriorhodopsins and bacteriophytochromes in some bacteria, phytochromes in plants, and rhodopsins in the photoreceptor cells of the vertebral retina. The light-sensitive property of these receptors is because of the bound chromophores, such as bilin in the phytochromes and retinal in the rhodopsins.
Rhodopsins belong to the family of cell surface proteins called G-protein coupled receptors,...
3.1K
Photoreceptors and Visual Pathways01:22

Photoreceptors and Visual Pathways

8.7K
At the molecular level, visual signals trigger transformations in photopigment molecules, resulting in changes in the photoreceptor cell's membrane potential. The photon's energy level is denoted by its wavelength, with each specific wavelength of visible light associated with a distinct color. The spectral range of visible light, classified as electromagnetic radiation, spans from 380 to 720 nm. Electromagnetic radiation wavelengths exceeding 720 nm fall under the infrared category,...
8.7K
Anatomy of the Eyeball01:20

Anatomy of the Eyeball

9.4K
The eye is a spherical, hollow structure composed of three tissue layers. The outer layer — the fibrous tunic, comprises the sclera — a white structure — and the cornea, which is transparent. The sclera encompasses some of the ocular surface, most of which is not visible. However, the 'white of the eye' is distinctively visible in humans compared to other species. The cornea, a clear covering at the front of the eye, enables light penetration. The eye's middle...
9.4K
Transduction01:16

Transduction

1.2K
Among the three main modes of HGT—transformation, conjugation, and transduction—transduction is unique in that it is mediated by bacteriophages, or bacterial viruses.Transduction occurs in two ways. Generalized transduction occurs during the lytic cycle of a bacteriophage infection. In this process, bacteriophages infect bacterial cells, replicate within them, and ultimately cause cell lysis, releasing newly assembled virions. Occasionally, random fragments of the bacterial genome...
1.2K
The Photochemical Reaction Center01:29

The Photochemical Reaction Center

5.2K
Reaction centers are pigment-protein complexes that initiate energy conversion from photons to chemical entities. Therefore, photochemical reaction center is a more appropriate term that describes these complexes. The Nobel laureates Robert Emerson and William Arnold provided the first experimental evidence of photochemical reaction centers by demonstrating the participation of nearly 2,500 chlorophyll molecules for the release of just one molecule of oxygen. Despite thousands of photosynthetic...
5.2K
Anoxygenic Photosynthesis01:30

Anoxygenic Photosynthesis

1.1K
Anoxygenic photosynthesis is a phototrophic process that captures light energy to drive carbon fixation without producing molecular oxygen. Unlike oxygenic photosynthesis, which utilizes water as an electron donor and releases oxygen, anoxygenic phototrophs use alternative electron donors such as hydrogen sulfide (H₂S), elemental sulfur (S⁰), or thiosulfate (S₂O₃²⁻). This process is carried out by diverse groups of bacteria, including purple bacteria, green...
1.1K

こちらも読む

関連記事

共著者、ジャーナル、引用グラフによってこの研究に関連する記事。

並び替え
Same author

Professional Academies: The Duty to Lead.

Microbial biotechnology·2026
Same author

Photosymbiosis: When heterotrophs turn green.

Current biology : CB·2026
Same author

Living together: evolutionary and ecological dimensions of protist endosymbiosis.

microLife·2026
Same author

Why Euglenozoans.

Methods in molecular biology (Clifton, N.J.)·2026
Same author

Euglenid Extrachromosomal DNA: Assembly and Annotation.

Methods in molecular biology (Clifton, N.J.)·2026
Same author

Scientists' Warning to Humanity: The Need to Begin Teaching Critical and Systems Thinking Early in Life.

Microbial biotechnology·2025
Same journal

The role of miRNAs in the pathogenesis, diagnosis, and personalized therapy of glioblastoma multiforme

Postepy biochemii·2026
Same journal

Molecular mechanisms of mherapy resistance in ovarian cancer

Postepy biochemii·2026
Same journal

Role of phytotherapeutics in diagnosis and treatment of diabetes

Postepy biochemii·2026
Same journal

Riboregulation in bacteria: From simple switches to complex regulatory networks

Postepy biochemii·2026
Same journal

Application of analytical protein microarrays in the diagnosis and therapy of lung cancer

Postepy biochemii·2026
Same journal

Plant Iridoid Glycosides: Biological Properties and Pharmacological Potential

Postepy biochemii·2026
関連記事をすべて見る

関連する実験動画

Updated: Jan 13, 2026

Strategic Screening and Characterization of the Visual GPCR-mini-G Protein Signaling Complex for Successful Crystallization
09:19

Strategic Screening and Characterization of the Visual GPCR-mini-G Protein Signaling Complex for Successful Crystallization

Published on: March 16, 2020

7.4K

微生物ロドプシン – 構造から機能、そして生態学的適応まで

Anna Karnkowska1, Małgorzata Malczewska1

  • 1Uniwersytet Warszawski, Wydział Biologii, Instytut Biologii Ewolucyjnej.

Postepy biochemii
|January 8, 2026
PubMed
まとめ
この要約は機械生成です。

視覚やエネルギー変換に不可欠なタンパク質であるロドプシンは、動物や微生物に存在します。それらの異なる構造は別々の進化経路を示唆しており、環境要因が微生物ロドプシンの多様性に影響を与えています。

キーワード:
ロドプシン微生物ロドプシン収斂進化光受容体エネルギー変換環境適応水生生態系

さらに関連する動画

A Rhodopsin Transport Assay by High-Content Imaging Analysis
12:11

A Rhodopsin Transport Assay by High-Content Imaging Analysis

Published on: January 16, 2019

6.9K
Proton Transfer and Protein Conformation Dynamics in Photosensitive Proteins by Time-resolved Step-scan Fourier-transform Infrared Spectroscopy
10:03

Proton Transfer and Protein Conformation Dynamics in Photosensitive Proteins by Time-resolved Step-scan Fourier-transform Infrared Spectroscopy

Published on: June 27, 2014

18.4K

関連する実験動画

Last Updated: Jan 13, 2026

Strategic Screening and Characterization of the Visual GPCR-mini-G Protein Signaling Complex for Successful Crystallization
09:19

Strategic Screening and Characterization of the Visual GPCR-mini-G Protein Signaling Complex for Successful Crystallization

Published on: March 16, 2020

7.4K
A Rhodopsin Transport Assay by High-Content Imaging Analysis
12:11

A Rhodopsin Transport Assay by High-Content Imaging Analysis

Published on: January 16, 2019

6.9K
Proton Transfer and Protein Conformation Dynamics in Photosensitive Proteins by Time-resolved Step-scan Fourier-transform Infrared Spectroscopy
10:03

Proton Transfer and Protein Conformation Dynamics in Photosensitive Proteins by Time-resolved Step-scan Fourier-transform Infrared Spectroscopy

Published on: June 27, 2014

18.4K

科学分野:

  • 生化学
  • 分子生物学
  • 進化学

背景:

  • ロドプシンは、動物型と微生物型の両方を含む、すべての生命圏に存在する必須タンパク質です。
  • 両方のロドプシン型は、7回の膜貫通αヘリックスとレチナールリガンドの保存された構造を共有しています。
  • 構造的な類似性にもかかわらず、動物と微生物のロドプシンは配列相同性を欠いており、収斂進化を示唆しています。

研究 の 目的:

  • ロドプシンタンパク質の多様性と進化的分岐を探求すること。
  • 動物および微生物ロドプシンの異なる生物や環境における機能的役割を調査すること。
  • 特に水生生態系における環境要因がロドプシンの配列と構造をどのように形成するかを理解すること。

主な方法:

  • 動物および微生物ロドプシンの比較配列解析。
  • ロドプシンタンパク質ファミリーの構造解析。
  • ロドプシン特性と生態学的および環境的データの相関。

主要な成果:

  • 動物と微生物のロドプシンは独立して進化し、視覚やエネルギー変換などの異なる機能を果たしています。微生物ロドプシンは微生物に広く存在し、光走性やイオン輸送に関与しています。海洋と淡水環境における環境条件は、ロドプシンの光学特性、配列、構造に大きく影響します。

結論:

  • ロドプシンは、機能的および環境的圧力によって駆動される収斂進化の魅力的な例を表しています。
  • 淡水微生物ロドプシンの多様性と生態学的意義を完全に理解するには、さらなる研究が必要です。
  • この研究は、さまざまな環境ニッチへのロドプシンタンパク質の適応性と、細胞エネルギー管理におけるそれらの基本的な役割を強調しています。