Download MendeleySolution structure and DNA-binding properties of a thermostable protein from the archaeon Sulfolobus solfataricus.
Baumann, H., Knapp, S., Lundback, T., Ladenstein, R., Hard, T.(1994) Nat Struct Biol 1: 808-819
- PubMed: 7634092
- DOI: https://doi.org/10.1038/nsb1194-808
- Primary Citation of Related Structures:
1SSO - PubMed Abstract:
The archaeon Sulfolobus solfataricus expresses large amounts of a small basic protein, Sso7d, which was previously identified as a DNA-binding protein possibly involved in compaction of DNA. We have determined the solution structure of Sso7d. The protein consists of a triple-stranded anti-parallel beta-sheet onto which an orthogonal double-stranded beta-sheet is packed. This topology is very similar to that found in eukaryotic Src homology-3 (SH3) domains. Sso7d binds strongly (Kd < 10 microM) to double-stranded DNA and protects it from thermal denaturation. In addition, we note that epsilon-mono-methylation of lysine side chains of Sso7d is governed by cell growth temperatures, suggesting that methylation is related to the heat-shock response.
Organizational Affiliation:
Center for Structural Biochemistry, Karolinska Institutet, NOVUM, Huddinge, Sweden.
