1N0R

4ANK: A designed ankyrin repeat protein with four identical consensus repeats

1N0R の概要

• エントリーDOI: 10.2210/pdb1n0r/pdb
• 関連するPDBエントリー: 1N0Q
• 分子名称: 4 ankyrin repeats, BROMIDE ION (3 entities in total)
• 機能のキーワード: ankyrin repeat, ank, structural protein
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 13608.29

構造登録者

Mosavi, L.K.,Minor Jr., D.L.,Peng, Z.-Y. (登録日: 2002-10-14, 公開日: 2003-01-28, 最終更新日: 2024-02-14)

主引用文献

Mosavi, L.K.,Minor Jr., D.L.,Peng, Z.-Y.
Consensus-derived structural determinants of the ankyrin repeat motif.
Proc.Natl.Acad.Sci.USA, 99:16029-16034, 2002

PubMed Abstract: The ankyrin repeat is one of the most common, modular, protein-protein interaction motifs in nature. To understand the structural determinants of this family of proteins and extract the consensus information that defines the architecture of this motif, we have designed a series of idealized ankyrin repeat proteins containing one, two, three, or four repeats by using statistical analysis of approximately 4,000 ankyrin repeat sequences from the PFAM database. Biophysical and x-ray crystallographic studies of the three and four repeat constructs (3ANK and 4ANK) to 1.26 and 1.5 A resolution, respectively, demonstrate that these proteins are well-folded, monomeric, display high thermostability, and adopt a very regular, tightly packed ankyrin repeat fold. Mapping the degree of amino acid conservation at each position on the 4ANK structure shows that most nonconserved residues are clustered on the surface of the molecule that has been designated as the binding site in naturally occurring ankyrin repeat proteins. Thus, the consensus amino acid sequence contains all information required to define the ankyrin repeat fold. Our results suggest that statistical analysis and the consensus sequence approach can be used as an effective method to design proteins with complex topologies. These generic ankyrin repeat proteins can serve as prototypes for dissecting the rules of molecular recognition mediated by ankyrin repeats and for engineering proteins with novel biological functions.

PubMed: 12461176
DOI: 10.1073/pnas.252537899

実験手法

X-RAY DIFFRACTION (1.5 Å)