9BCM

Crystal structure of the glycosyltransferase UGT95A1

9BCM の概要

• エントリーDOI: 10.2210/pdb9bcm/pdb
• 分子名称: Glycosyltransferase (2 entities in total)
• 機能のキーワード: glycosyltransferase, transferase
• 由来する生物種: Pilosella officinarum
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 59353.84

構造登録者

Pereira, J.H.,Sirirungruang, S.,Shih, P.M.,Adams, P.D. (登録日: 2024-04-09, 公開日: 2024-08-07, 最終更新日: 2024-09-04)

主引用文献

Sirirungruang, S.,Blay, V.,Scott, Y.F.,Pereira, J.H.,Hammel, M.,Barnum, C.R.,Adams, P.D.,Shih, P.M.
Structural and biochemical basis for regiospecificity of the flavonoid glycosyltransferase UGT95A1.
J.Biol.Chem., 300:107602-107602, 2024

PubMed Abstract: Glycosylation is a predominant strategy plants use to fine-tune the properties of small molecule metabolites to affect their bioactivity, transport, and storage. It is also important in biotechnology and medicine as many glycosides are utilized in human health. Small molecule glycosylation is largely carried out by family 1 glycosyltransferases. Here, we report a structural and biochemical investigation of UGT95A1, a family 1 GT enzyme from Pilosella officinarum that exhibits a strong, unusual regiospecificity for the 3'-O position of flavonoid acceptor substrate luteolin. We obtained an apo crystal structure to help drive the analyses of a series of binding site mutants, revealing that while most residues are tolerant to mutations, key residues M145 and D464 are important for overall glycosylation activity. Interestingly, E347 is crucial for maintaining the strong preference for 3'-O glycosylation, while R462 can be mutated to increase regioselectivity. The structural determinants of regioselectivity were further confirmed in homologous enzymes. Our study also suggests that the enzyme contains large, highly dynamic, disordered regions. We showed that while most disordered regions of the protein have little to no implication in catalysis, the disordered regions conserved among investigated homologs are important to both the overall efficiency and regiospecificity of the enzyme. This report represents a comprehensive in-depth analysis of a family 1 GT enzyme with a unique substrate regiospecificity and may provide a basis for enzyme functional prediction and engineering.

PubMed: 39059496
DOI: 10.1016/j.jbc.2024.107602

実験手法

X-RAY DIFFRACTION (2.36 Å)