5LEM

Crystal structure of DARPin-DARPin rigid fusion, variant DD_Off7_11_3G124 in complex with Maltose-binding Protein and Green Fluorescent Protein

5LEM の概要

• エントリーDOI: 10.2210/pdb5lem/pdb
• 分子名称: DD_Off7_11_3G124, Maltose-binding periplasmic protein, Green fluorescent protein, ... (4 entities in total)
• 機能のキーワード: x-ray crystallography; designed ankyrin repeat proteins; protein design; protein engineering; rigid domain fusions, fluorescent protein
• 由来する生物種: synthetic construct; 詳細
• タンパク質・核酸の鎖数: 3
• 化学式量合計: 106681.24

構造登録者

Batyuk, A.,Wu, Y.,Mittl, P.R.,Plueckthun, A. (登録日: 2016-06-30, 公開日: 2017-08-02, 最終更新日: 2019-10-16)

主引用文献

Wu, Y.,Batyuk, A.,Honegger, A.,Brandl, F.,Mittl, P.R.E.,Pluckthun, A.
Rigidly connected multispecific artificial binders with adjustable geometries.
Sci Rep, 7:11217-11217, 2017

PubMed Abstract: Multivalent binding proteins can gain biological activities beyond what is inherent in the individual binders, by bringing together different target molecules, restricting their conformational flexibility or changing their subcellular localization. In this study, we demonstrate a method to build up rigid multivalent and multispecific scaffolds by exploiting the modular nature of a repeat protein scaffold and avoiding flexible linkers. We use DARPins (Designed Ankyrin Repeat Proteins), synthetic binding proteins based on the Ankyrin-repeat protein scaffold, as binding units. Their ease of in vitro selection, high production yield and stability make them ideal specificity-conferring building blocks for the design of more complex constructs. C- and N-terminal DARPin capping repeats were re-designed to be joined by a shared helix in such a way that rigid connector modules are formed. This allows us to join two or more DARPins in predefined geometries without compromising their binding affinities and specificities. Nine connector modules with distinct geometries were designed; for eight of these we were able to confirm the structure by X-ray crystallography, while only one did not crystallize. The bispecific constructs were all able to bind both target proteins simultaneously.

PubMed: 28894181
DOI: 10.1038/s41598-017-11472-x

実験手法

X-RAY DIFFRACTION (2.98 Å)