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  Crystal structures of transcription factor NusG in light of its nucleic acid- and protein-binding activities

Steiner, T., Kaiser, J. T., Marinkovic, S., Huber, R., & Wahl, M. C. (2002). Crystal structures of transcription factor NusG in light of its nucleic acid- and protein-binding activities. EMBO Journal, 21(17), 4641-4653. Retrieved from http://www.nature.com/emboj/journal/v21/n17/pdf/7594673a.pdf.

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 Urheber:
Steiner, T., Autor
Kaiser, J. T., Autor
Marinkovic, S., Autor
Huber, R., Autor
Wahl, M. C.1, Autor           
Affiliations:
1Research Group of X-Ray Crystallography, MPI for biophysical chemistry, Max Planck Society, ou_578578              

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Schlagwörter: KOW domain; NusG; protein-nucleic acid interaction; regulation of transcription and translation; transcription termination and antitermination
 Zusammenfassung: Microbial transcription modulator NusG interacts with RNA polymerase and termination factor rho, displaying striking functional homology to eukaryotic Spt5. The protein is also a translational regulator. We have determined crystal structures of Aquifex aeolicus NusG showing a modular design: an N- terminal RNP-like domain, a C-terminal element with a KOW sequence motif and a species-specific immunoglobulin-like fold. The structures reveal bona fide nucleic acid binding sites, and nucleic acid binding activities can be detected for NusG from three organisms and for the KOW element alone. A conserved KOW domain is defined as a new class of nucleic acid binding folds. This module is a close structural homolog of tudor protein- protein interaction motifs. Putative protein binding sites for the RNP and KOW domains can be deduced, which differ from the areas implicated in nucleic acid interactions. The results strongly argue that both protein and nucleic acid contacts are important for NusG's functions and that the factor can act as an adaptor mediating indirect protein-nucleic acid associations.

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Sprache(n): eng - English
 Datum: 2002-09-02
 Publikationsstatus: Erschienen
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 Art der Begutachtung: Expertenbegutachtung
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Titel: EMBO Journal
Genre der Quelle: Zeitschrift
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Seiten: - Band / Heft: 21 (17) Artikelnummer: - Start- / Endseite: 4641 - 4653 Identifikator: -