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Solution structure of a multifunctional DNA- and protein-binding motif of human Werner syndrome protein.
- Source :
- Proceedings of the National Academy of Sciences of the United States of America; 12/20/2005, Vol. 102 Issue 51, p18379-18384, 6p
- Publication Year :
- 2005
-
Abstract
- Werner syndrome (WS) is an autosomal recessive disease that results in premature aging. Mutations in the WS gene (WRN) result in a loss of expression of the WRN protein and predispose WS patients to accelerated aging. As a helicase and a nuclease, WRN is unique among the five human RecQ helicase family members and is capable of multiple functions involved in DNA replication, repair, recombination, and telomere maintenance. A 144-residue fragment of WRN was previously determined to be a multifunctional DNA- and protein-binding domain (DPBD) that interacts with structure-specific DNA and a variety of DNA-processing proteins. In addition, DPBD functions as a nucleolar targeting sequence of WRN. The solution structure of the DPBD, the first of a WRN fragment, has been solved by NMR. DPBD consists of a winged helix-like motif and an unstructured C-terminal region of ≈20 aa. The putative DNA-binding surface of DPBD has been identified by using known structural and biochemical data. Based on the structural data and on the biochemical data, we suggest a surface on the DPBD for interacting with other proteins. In this structural model, a single winged helix domain binds to both DNA and other proteins. Furthermore, we propose that DPBD functions as a regulatory domain to regulate the enzymatic activity of WRN and to direct cellular localization of WRN through protein-protein interaction. [ABSTRACT FROM AUTHOR]
- Subjects :
- NUCLEIC acids
DNA
GENES
PROTEINS
BIOMOLECULES
DEVELOPMENTAL biology
Subjects
Details
- Language :
- English
- ISSN :
- 00278424
- Volume :
- 102
- Issue :
- 51
- Database :
- Complementary Index
- Journal :
- Proceedings of the National Academy of Sciences of the United States of America
- Publication Type :
- Academic Journal
- Accession number :
- 19524471
- Full Text :
- https://doi.org/10.1073/pnas.0509380102