5DBV

Structure of a C269A mutant of propionaldehyde dehydrogenase from the Clostridium phytofermentans fucose utilisation bacterial microcompartment

5DBV の概要

• エントリーDOI: 10.2210/pdb5dbv/pdb
• 分子名称: Aldehyde Dehydrogenase, SULFATE ION, COENZYME A, ... (5 entities in total)
• 機能のキーワード: acylating aldehyde dehydrogenase, coa, propionaldehyde, bmc, oxidoreductase
• 由来する生物種: Clostridium phytofermentans (strain ATCC 700394 / DSM 18823 / ISDg)
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 48956.68

構造登録者

Tuck, L.R.,Altenbach, K.,Ang, T.F.,Crawshaw, A.D.,Campopiano, D.J.,Clarke, D.J.,Marles-Wright, J. (登録日: 2015-08-22, 公開日: 2016-03-16, 最終更新日: 2024-01-10)

主引用文献

Tuck, L.R.,Altenbach, K.,Ang, T.F.,Crawshaw, A.D.,Campopiano, D.J.,Clarke, D.J.,Marles-Wright, J.
Insight into Coenzyme A cofactor binding and the mechanism of acyl-transfer in an acylating aldehyde dehydrogenase from Clostridium phytofermentans.
Sci Rep, 6:22108-22108, 2016

PubMed Abstract: The breakdown of fucose and rhamnose released from plant cell walls by the cellulolytic soil bacterium Clostridium phytofermentans produces toxic aldehyde intermediates. To enable growth on these carbon sources, the pathway for the breakdown of fucose and rhamnose is encapsulated within a bacterial microcompartment (BMC). These proteinaceous organelles sequester the toxic aldehyde intermediates and allow the efficient action of acylating aldehyde dehydrogenase enzymes to produce an acyl-CoA that is ultimately used in substrate-level phosphorylation to produce ATP. Here we analyse the kinetics of the aldehyde dehydrogenase enzyme from the fucose/rhamnose utilisation BMC with different short-chain fatty aldehydes and show that it has activity against substrates with up to six carbon atoms, with optimal activity against propionaldehyde. We have also determined the X-ray crystal structure of this enzyme in complex with CoA and show that the adenine nucleotide of this cofactor is bound in a distinct pocket to the same group in NAD(+). This work is the first report of the structure of CoA bound to an aldehyde dehydrogenase enzyme and our crystallographic model provides important insight into the differences within the active site that distinguish the acylating from non-acylating aldehyde dehydrogenase enzymes.

PubMed: 26899032
DOI: 10.1038/srep22108

実験手法

X-RAY DIFFRACTION (1.77 Å)