8VA3

Crystal structure of CapGH3b enzyme retrieved from capybara gut metagenome

8VA3 の概要

• エントリーDOI: 10.2210/pdb8va3/pdb
• 分子名称: Glycoside hydrolase family 3, DI(HYDROXYETHYL)ETHER, TRIETHYLENE GLYCOL, ... (9 entities in total)
• 機能のキーワード: metagenome, hydrolase
• 由来する生物種: metagenome
• タンパク質・核酸の鎖数: 2
• 化学式量合計: 176257.62

構造登録者

Martins, M.P.,Morais, M.A.B.,Chinaglia, M.,Mandelli, F.,Lima, E.A.,Murakami, M.T. (登録日: 2023-12-11, 公開日: 2024-10-23)

主引用文献

Mandelli, F.,Martins, M.P.,Chinaglia, M.,Lima, E.A.,Morais, M.A.B.,Lima, T.B.,Cabral, L.,Pirolla, R.A.S.,Fuzita, F.J.,Paixao, D.A.A.,Andrade, M.O.,Wolf, L.D.,Vieira, P.S.,Persinoti, G.F.,Murakami, M.T.
A functionally augmented carbohydrate utilization locus from herbivore gut microbiota fueled by dietary beta-glucans.
NPJ Biofilms Microbiomes, 10:105-105, 2024

PubMed Abstract: Gut microbiota members from the Bacteroidota phylum play a pivotal role in mammalian health and metabolism. They thrive in this diverse ecosystem due to their notable ability to cope with distinct recalcitrant dietary glycans via polysaccharide utilization loci (PULs). Our study reveals that a PUL from an herbivore gut bacterium belonging to the Bacteroidota phylum, with a gene composition similar to that in the human gut, exhibits extended functionality. While the human gut PUL targets mixed-linkage β-glucans specifically, the herbivore gut PUL also efficiently processes linear and substituted β-1,3-glucans. This gain of function emerges from molecular adaptations in recognition proteins and carbohydrate-active enzymes, including a β-glucosidase specialized for β(1,6)-glucosyl linkages, a typical substitution in β(1,3)-glucans. These findings broaden the existing model for non-cellulosic β-glucans utilization by gut bacteria, revealing an additional layer of functional and evolutionary complexity within the gut microbiota, beyond conventional gene insertions/deletions to intricate biochemical interactions.

PubMed: 39397008
DOI: 10.1038/s41522-024-00578-6

実験手法

X-RAY DIFFRACTION (1.8 Å)