Structure and dynamics of KH domains from FBP bound to single-stranded DNA

Article

关键词: RESIDUAL DIPOLAR COUPLINGS;    FAR UPSTREAM ELEMENT;    C-MYC;    STRUCTURE REFINEMENT;    INTERDOMAIN MOTION;    RNA-BINDING;    RELAXATION;    COMPLEXES;    PROTEINS;    TFIIH;   

DOI  :  10.1038/4151051a

来源: SCIE

【 摘 要 】

Gene regulation can be tightly controlled by recognition of DNA deformations that are induced by stress generated during transcription(1-3). The KH domains of the FUSE-binding protein (FBP), a regulator of c-myc expression(1,4), bind in vivo and in vitro to the single-stranded far-upstream element (FUSE), 1,500 base pairs upstream from the c-myc promoter(4-6). FBP bound to FUSE acts through TFIIH at the promoter(4). Here we report the solution structure of a complex between the KH3 and KH4 domains of FBP and a 29-base single-stranded DNA from FUSE. The KH domains recognize two sites, 9-10 bases in length, separated by 5 bases, with KH4 bound to the 5' site and KH3 to the 3' site. The central portion of each site comprises a tetrad of sequence 5'd-ATTC for KH4 and 5'd-TTTT for KH3. Dynamics measurements show that the two KH domains bind as articulated modules to single-stranded DNA, providing a flexible framework with which to recognize transient, moving targets.

【 授权许可】

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