+検索条件
-Structure paper
| タイトル | CryoSeek: A strategy for bioentity discovery using cryoelectron microscopy. |
|---|---|
| ジャーナル・号・ページ | Proc Natl Acad Sci U S A, Vol. 121, Issue 42, Page e2417046121, Year 2024 |
| 掲載日 | 2024年10月15日 |
著者 | Tongtong Wang / Zhangqiang Li / Kui Xu / Wenze Huang / Gaoxingyu Huang / Qiangfeng Cliff Zhang / Nieng Yan / ![]() |
| PubMed 要旨 | Structural biology is experiencing a paradigm shift from targeted structural determination to structure-guided discovery of previously uncharacterized bioentities. We employed cryoelectron microscopy ...Structural biology is experiencing a paradigm shift from targeted structural determination to structure-guided discovery of previously uncharacterized bioentities. We employed cryoelectron microscopy (cryo-EM) to analyze filtered water samples collected from the Tsinghua Lotus Pond. Here, we report the structural determination and characterization of two highly similar helical fibrils, named TLP-1a and TLP-1b, each approximately 8 nm in diameter with a 15-Å wide tunnel. These fibrils are assembled from a similar protein protomer, whose structure was conveniently automodeled in CryoNet. The protomer structure does not match any available experimental structures, but shares the same fold as many predicted structures of unknown functions. The amino-terminal β strand of protomer n + 4 inserts into a cleft in protomer n to complete an immunoglobulin (Ig)-like domain. This packing mechanism, known as donor-strand exchange (DSE), has been observed in several bacterial pilus assemblies, wherein the donor is protomer n + 1. Despite distinct shape and thickness, this reminiscence suggests that TLP-1a/b fibrils may represent uncharacterized bacterial pili. Our study demonstrates an emerging paradigm in structural biology, where high-resolution structural determination precedes and drives the identification and characterization of completely unknown objects. |
リンク | Proc Natl Acad Sci U S A / PubMed:39382995 / PubMed Central |
| 手法 | EM (らせん対称) |
| 解像度 | 3.22 - 3.51 Å |
| 構造データ | EMDB-60656, PDB-9ikj: EMDB-60657, PDB-9ikk: |
| 由来 |
|
キーワード | PROTEIN FIBRIL / Fibril |
ムービー
コントローラー
構造ビューア
万見文献について



著者
リンク



キーワード