9B7Z

Human endogenous FASN with 1,3-DBP - Class 1 focused condensing wing

9B7Z の概要

• エントリーDOI: 10.2210/pdb9b7z/pdb
• 関連するPDBエントリー: 9MJ9
• EMDBエントリー: 44300 44329
• 分子名称: Fatty acid synthase (1 entity in total)
• 機能のキーワード: de novo fatty acid synthesis fatty acid synthase, biosynthetic protein
• 由来する生物種: Homo sapiens (human)
• タンパク質・核酸の鎖数: 2
• 化学式量合計: 185031.56

構造登録者

Choi, W.,Li, C.,Chen, Y.,Wang, Y.,Cheng, Y. (登録日: 2024-03-28, 公開日: 2025-02-26, 最終更新日: 2025-05-21)

主引用文献

Choi, W.,Li, C.,Chen, Y.,Wang, Y.,Cheng, Y.
Structural dynamics of human fatty acid synthase in the condensing cycle.
Nature, 641:529-536, 2025

PubMed Abstract: Long chain fatty acids are the building blocks of fat in human bodies. In mammals, fatty acid synthase (FASN) contains multiple enzymatic domains to catalyze all chemical reactions needed for de novo fatty acid synthesis. While the chemical reactions carried out by these enzymatic domains are well defined, how the dimeric FASN with an open architecture continuously catalyzes such reactions to synthesize a complete fatty acid remains elusive. Here, using a strategy of tagging and purifying endogenous FASN in HEK293 for single particle cryogenic electron microscopy studies, we characterized the structural dynamics of endogenous human FASN. We captured the conformational snapshots of various functional substates in the condensing cycle and developed a procedure to analyze particle distribution landscape of FASN with different orientations between its condensing and modifying wings. Together, we reveal that FASN function does not require large rotational motion between its two major functional domains during the condensing cycle, and that the catalytic reactions in condensing cycle carried out by two monomers are unsynchronized. Our data thus provide a new composite view of FASN dynamics during the fatty acid synthesis condensing cycle.

PubMed: 39978408
DOI: 10.1038/s41586-025-08782-w

実験手法

ELECTRON MICROSCOPY (2.5 Å)