関連する実験動画
Updated: Sep 16, 2025

09:37
An Integrated Approach for Microprotein Identification and Sequence Analysis
Published on: July 12, 2022
3.5K
初期ミオセンのライノセロチドから派生遺伝的に情報を与えるタンパク質
Ryan S Paterson1, Meaghan Mackie2,3, Alessio Capobianco4,5
1Globe Institute, University of Copenhagen, Copenhagen, Denmark. ryan.paterson@sund.ku.dk.
Nature
|July 9, 2025
まとめ
初期ミオセンの犀牛類化石の古代のタンパク質は 2千万~2千万年前まで遡ります パレオプロテオミクスは,サイの多様化と古代の動物起源に関する新しい詳細を明らかにしています.
科学分野:
- 古生物学
- 分子生物学
- 進化生物学
背景:
- 古代のタンパク質配列は ディープタイム 系統遺伝的推論のためにますます使用されています
- 以前の研究は,より若いサンプル (プリオセーン,約370万年前) に限定されていました.
研究 の 目的:
- 古代のタンパク質の 遺伝学的な洞察を 時間を遡ること
- 初期ミオセンのサイの化石の 乳膜タンパク質を分析する
主な方法:
- エナメルタンパク質の配列を犀牛類の化石 (Epiaceratherium sp. 初期ミオセンのCMNFV59632).
- 1,000以上のペプチドスペクトルの解析と 7つのエナメルタンパク質の部分的な配列
- ベイジアン・ティップ・デッティングの適用と,タンパク質の内生性に対するダメージ指標の評価
主要な成果:
- 2千万~2千万年前の化石から 古代のタンパク質の配列を成功裏に回収し 遺伝学的な洞察の年齢制限を大幅に押し戻しました
- タンパク質損傷の指標は,回収された配列の内在性を確認した.
- ベイジアン・ティップ・デッティングは,ミドル・エオセノ・オリゴセノの多様性を示唆し,ライノセロチドの多様化と一致した.
結論:
- パレオプロテオミクスは,内生的なDNAを生むものよりもはるかに古い,非常に古い標本から貴重な遺伝情報を得ることができます.
- この発見は,犀牛類の進化史,特にエラスモテリアン類の多様性に関する理解を深める.
- この結果は,ホットンクレーター動物群の起源に関する仮説を裏付けている.
関連する概念動画
Diversity of Protists III
138
Rhizaria are a diverse group of unicellular protists characterized by their threadlike cytoplasmic extensions known as pseudopodia. These structures aid in both locomotion and feeding, giving Rhizaria an amoeboid appearance. Their amoeboid morphology once led to taxonomic confusion, but molecular phylogenetics has clarified their evolutionary placement and emphasized their shared use of pseudopodia despite divergent lineages.This clade comprises diverse lineages such as Chlorarachniophyta,...
138
Phylogeny
47.8K
Phylogeny is concerned with the evolutionary diversification of organisms or groups of organisms. A group of organisms with a name is called a taxon (singular). Taxa (plural) can span different levels of the evolutionary hierarchy. For instance, the group containing all birds is a taxon (comprising the class Aves), and the group of all species of daisies (the genus Bellis) is a taxon. Phylogenies can likewise include just one genus (i.e., depict species relationships) or span an entire kingdom.
47.8K
Gene Evolution - Fast or Slow?
7.5K
The genomes of eukaryotes are punctuated by long stretches of sequence which do not code for proteins or RNAs. Although some of these regions do contain crucial regulatory sequences, the vast majority of this DNA serves no known function. Typically, these regions of the genome are the ones in which the fastest change, in evolutionary terms, is observed, because there is typically little to no selection pressure acting on these regions to preserve their sequences.
In contrast, regions which code...
In contrast, regions which code...
7.5K
The Fossil Record
25.7K
The fossil record documents only a small fraction of all organisms that have ever inhabited Earth. Fossilization is a rare process, and most organisms never become fossils. Moreover, the fossil record only exhibits fossils that have been discovered. Nevertheless, sedimentary rock fossils of long-lived, abundant, hard-bodied organisms dominate the fossil record. These fossils offer valuable information, such as an organism's physical form, behavior, and age. Studying the fossil record helps...
25.7K
Conservation of Protein Domains Over Different Proteins
11.4K
Protein domains are small structurally independent units that are part of a single amino acid chain. Although these domains are often structurally independent, they may rely on synergistic effects to perform their functions as part of a larger protein. Protein domains may be conserved within the same organism, as well as across different organisms.
A limited set of protein domains often duplicate and recombine during evolution. These domains can be organized in different combinations to...
A limited set of protein domains often duplicate and recombine during evolution. These domains can be organized in different combinations to...
11.4K
The Tree of Life - Bacteria, Archaea, Eukaryotes
34.1K
The “tree of life” describes the evolution of life and the evolutionary relationships between organisms. The root of the tree is the common ancestor to all life on Earth. All other species radiate from this point, much like the branches of a tree. The numerous tips of these branches on the tree of life represent every living, or extant, species. Extinct species, which are species that no longer exist, can be found towards the center of the tree. Currently, these organisms, both...
34.1K

