DNA-Binding Property of the Novel DNA-Binding Domain STPR in FMBP-1 of the Silkworm Bombyx mori
Year: 2009
Type: article
Abstract: The STPR domain is a novel DNA-binding domain composed of repeats of 23 amino-acid-long peptide found in the fibroin-modulator-binding protein-1 (FMBP-1) of the silkworm Bombyx mori. Theoretical proteins having the STPR domain are highly conserved, particularly in vertebrates, but the functions are mostly unknown. In this study, the DNA-binding property of the STPR domain in FMBP-1 was examined. Use of reagents selecting the DNA groove and an oligonucleotide in which the dA:dT pairs of the probe were replaced with dI:dC pairs in mobility shift assay demonstrated that FMBP-1 approaches DNA from the major groove. Permutation electrophoresis using probes of the same length but containing the FMBP-1-binding site at different positions showed that FMBP-1 bends DNA through its binding. To induce the sharp bend of DNA, the STPR domain alone was insufficient and the long N-terminal extending region was necessary. Moreover, the basic region extending from the N-terminus of the STPR domain stabilized the DNA binding of the STPR domain. These results suggested that DNA-binding properties of the STPR domain are affected strongly by the structure of the flanking regions in the STPR domain-containing proteins.
Source: The Journal of Biochemistry
DOI: 10.1093/jb/mvp053
Authors: S. Takiya, S. Saito, T. Yokoyama, D. Matsumoto, T. Aizawa, M. Kamiya, M. Demura, K. Kawano
Institution: Hokkaido University
Language: English
Subfield: Biomaterials
Field: Materials Science
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2010511708