6UGK

CRYSTAL STRUCTURE OF CIRCULARLY PERMUTED HUMAN TASPASE-1

6UGK の概要

• エントリーDOI: 10.2210/pdb6ugk/pdb
• 分子名称: Threonine aspartase 1,Threonine aspartase 1, SODIUM ION, CHLORIDE ION, ... (4 entities in total)
• 機能のキーワード: mll, taspase-1, circular permutation, hydrolase
• 由来する生物種: Homo sapiens (Human); 詳細
• タンパク質・核酸の鎖数: 2
• 化学式量合計: 70875.71

構造登録者

Edwards, T.E.,Delker, S.L. (登録日: 2019-09-26, 公開日: 2021-03-10, 最終更新日: 2023-10-11)

主引用文献

Nagaratnam, N.,Delker, S.L.,Jernigan, R.,Edwards, T.E.,Snider, J.,Thifault, D.,Williams, D.,Nannenga, B.L.,Stofega, M.,Sambucetti, L.,Hsieh, J.J.,Flint, A.J.,Fromme, P.,Martin-Garcia, J.M.
Structural insights into the function of the catalytically active human Taspase1.
Structure, 29:873-885.e5, 2021

PubMed Abstract: Taspase1 is an Ntn-hydrolase overexpressed in primary human cancers, coordinating cancer cell proliferation, invasion, and metastasis. Loss of Taspase1 activity disrupts proliferation of human cancer cells in vitro and in mouse models of glioblastoma. Taspase1 is synthesized as an inactive proenzyme, becoming active upon intramolecular cleavage. The activation process changes the conformation of a long fragment at the C-terminus of the α subunit, for which no full-length structural information exists and whose function is poorly understood. We present a cloning strategy to generate a circularly permuted form of Taspase1 to determine the crystallographic structure of active Taspase1. We discovered that this region forms a long helix and is indispensable for the catalytic activity of Taspase1. Our study highlights the importance of this element for the enzymatic activity of Ntn-hydrolases, suggesting that it could be a potential target for the design of inhibitors with potential to be developed into anticancer therapeutics.

PubMed: 33784495
DOI: 10.1016/j.str.2021.03.008

実験手法

X-RAY DIFFRACTION (2.15 Å)