- PMID:
8620531
- Authors:
- Konig P, Giraldo R, Chapman L, Rhodes D
- Title:
- The crystal structure of the DNA-binding domain of yeast RAP1 in complex with telomeric DNA.
- Journal:
- Cell. 1996 Apr 5;85(1):125-36.
- Abstract:
- Telomeres, the nucleoprotein complexes at the ends of eukaryotic chromosomes, are essential for chromosome stability. In the yeast S. cerevisiae, telomeric DNA is bound in a sequence-specific manner by RAP1, a multifunctional protein also involved in transcriptional regulation. Here we report the crystal structure of the DNA-binding domain of RAP1 in complex with telomeric DNA site at 2.25 A resolution. The protein contains two similar domains that bind DNA in a tandem orientation, recognizing a tandemly repeated DNA sequence. The domains are structurally related to the homeodomain and the proto-oncogene Myb, but show novel features in their DNA-binding mode. A structured linker between the domains and a long C-terminal tail contribute to the binding specificity. This structure provides insight into the recognition of the conserved telomeric DNA sequences by a protein.