5KOD

Crystal Structure of GH3.5 Acyl Acid Amido Synthetase from Arabidopsis thaliana

5KOD の概要

• エントリーDOI: 10.2210/pdb5kod/pdb
• 分子名称: Indole-3-acetic acid-amido synthetase GH3.5, ADENOSINE MONOPHOSPHATE, 1H-INDOL-3-YLACETIC ACID, ... (5 entities in total)
• 機能のキーワード: anl, adenylating enzyme, acyl acid amido synthetase, adenylation ligase, ligase
• 由来する生物種: Arabidopsis thaliana (Mouse-ear cress)
• タンパク質・核酸の鎖数: 4
• 化学式量合計: 279714.09

構造登録者

Jez, J.M.,Westfall, C.S.,Zubieta, C. (登録日: 2016-06-30, 公開日: 2016-11-16, 最終更新日: 2023-10-04)

主引用文献

Westfall, C.S.,Sherp, A.M.,Zubieta, C.,Alvarez, S.,Schraft, E.,Marcellin, R.,Ramirez, L.,Jez, J.M.
Arabidopsis thaliana GH3.5 acyl acid amido synthetase mediates metabolic crosstalk in auxin and salicylic acid homeostasis.
Proc. Natl. Acad. Sci. U.S.A., 113:13917-13922, 2016

PubMed Abstract: In Arabidopsis thaliana, the acyl acid amido synthetase Gretchen Hagen 3.5 (AtGH3.5) conjugates both indole-3-acetic acid (IAA) and salicylic acid (SA) to modulate auxin and pathogen response pathways. To understand the molecular basis for the activity of AtGH3.5, we determined the X-ray crystal structure of the enzyme in complex with IAA and AMP. Biochemical analysis demonstrates that the substrate preference of AtGH3.5 is wider than originally described and includes the natural auxin phenylacetic acid (PAA) and the potential SA precursor benzoic acid (BA). Residues that determine IAA versus BA substrate preference were identified. The dual functionality of AtGH3.5 is unique to this enzyme although multiple IAA-conjugating GH3 proteins share nearly identical acyl acid binding sites. In planta analysis of IAA, PAA, SA, and BA and their respective aspartyl conjugates were determined in wild-type and overexpressing lines of A thaliana This study suggests that AtGH3.5 conjugates auxins (i.e., IAA and PAA) and benzoates (i.e., SA and BA) to mediate crosstalk between different metabolic pathways, broadening the potential roles for GH3 acyl acid amido synthetases in plants.

PubMed: 27849615
DOI: 10.1073/pnas.1612635113

実験手法

X-RAY DIFFRACTION (2.202 Å)