5A11

The crystal structure of Ta-TFP, a thiocyanate-forming protein involved in glucosinolate breakdown (space group P21)

5A11 の概要

• エントリーDOI: 10.2210/pdb5a11/pdb
• 関連するPDBエントリー: 5A10
• 分子名称: THIOCYANATE FORMING PROTEIN, IODIDE ION (3 entities in total)
• 機能のキーワード: immune system, specifier protein, kelch protein, field-penny cress, fe(ii) dependent
• 由来する生物種: THLASPI ARVENSE
• タンパク質・核酸の鎖数: 2
• 化学式量合計: 80389.05

構造登録者

Krausze, J.,Gumz, F.,Wittstock, U. (登録日: 2015-04-27, 公開日: 2015-08-26, 最終更新日: 2024-01-10)

主引用文献

Gumz, F.,Krausze, J.,Eisenschmidt, D.,Backenkohler, A.,Barleben, L.,Brandt, W.,Wittstock, U.
The Crystal Structure of the Thiocyanate-Forming Protein from Thlaspi Arvense, a Kelch Protein Involved in Glucosinolate Breakdown.
Plant Mol.Biol., 89:67-, 2015

PubMed Abstract: Kelch repeat-containing proteins are involved in diverse cellular processes, but only a small subset of plant kelch proteins has been functionally characterized. Thiocyanate-forming protein (TFP) from field-penny cress, Thlaspi arvense (Brassicaceae), is a representative of specifier proteins, a group of kelch proteins involved in plant specialized metabolism. As components of the glucosinolate-myrosinase system of the Brassicaceae, specifier proteins determine the profile of bioactive products formed when plant tissue is disrupted and glucosinolates are hydrolyzed by myrosinases. Here, we describe the crystal structure of TaTFP at a resolution of 1.4 Å. TaTFP crystallized as homodimer. Each monomer forms a six-blade β-propeller with a wide "top" and a narrower "bottom" opening with distinct strand-connecting loops protruding far beyond the lower propeller surface. Molecular modeling and mutational analysis identified residues for glucosinolate aglucone and Fe(2+) cofactor binding within these loops. As the first experimentally determined structure of a plant kelch protein, the crystal structure of TaTFP not only enables more detailed mechanistic studies on glucosinolate breakdown product formation, but also provides a new basis for research on the diverse roles and mechanisms of other kelch proteins in plants.

PubMed: 26260516
DOI: 10.1007/S11103-015-0351-9

実験手法

X-RAY DIFFRACTION (2.47 Å)