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  The N-terminal basic domain of human parvulin hPar14 is responsible for the entry to the nucleus and high-affinity DNA- binding

Surmacz, T. A., Bayer, E., Rahfeld, J.-U., Fischer, G., & Bayer, P. (2002). The N-terminal basic domain of human parvulin hPar14 is responsible for the entry to the nucleus and high-affinity DNA- binding. Journal of Molecular Biology, 321(2): 1, pp. 235-247. Retrieved from http://dx.doi.org/10.1016/S0022-2836(02)00615-0.

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Genre: Zeitschriftenartikel
Alternativer Titel : J. Mol. Biol.

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 Urheber:
Surmacz, Tatiana Anna1, Autor
Bayer, Elena1, Autor
Rahfeld, Jens-Ulrich1, Autor
Fischer, Gunter1, Autor
Bayer, Peter2, Autor           
Affiliations:
1Max Planck Institute of Molecular Physiology, Max Planck Society, ou_1753286              
2Sonstige Wissenschaftliche Organisationseinheiten, Max Planck Institute of Molecular Physiology, Max Planck Society, ou_1753294              

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Schlagwörter: parvulin; DNA-binding; cell-cycle; HMG-proteins; NMR
 Zusammenfassung: We have studied the cellular localization and the DNA-binding capability of human peptidyl-prolyl cis/trans isomerase hPar14. The cellular expression pattern shows an uneven distribution of the protein between cytoplasm and nucleus. To determine the nuclear localization of hPar14 in vivo the molecule was fused to green fluorescent protein and expressed in human HeLa cells. Deletion mutants of hPar14 were used to restrict a sequence, necessary for nuclear targeting, to Ser7-Lys14 of the N terminus of the protein. DNA-cellulose affinity experiments were performed to demonstrate that hPar14, which is present in the nuclear fraction, could bind to double-stranded native DNA in vitro. On the basis of homologies and similarities of hPar14 to members of the high-mobility group proteins, double-stranded DNA constructs were developed and tested for their hPar14 binding affinity in fluorescence titration assays. The protein binds preferentially to bent A-tract sequences. The binding interface of the protein was determined by 1-D and 2-D NMR studies of the complex of unlabeled DNA and uniformly N-15- labeled hPar14((1-131)). Experiments with a truncated hPar14((25-131)) showed that the unstructured N-terminal 25 amino acid residues are necessary for high-affinity binding to DNA. These findings in connection with sequence and structural homologies of hPar14 to members of the HMGB/HMGN protein family suggest a function of hPar14 in cell-cycle regulation or gene transcription. (C) 2002 Published by Elsevier Science Ltd.

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Sprache(n): eng - English
 Datum: 2002-08-01
 Publikationsstatus: Erschienen
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: eDoc: 15447
URI: http://dx.doi.org/10.1016/S0022-2836(02)00615-0
 Art des Abschluß: -

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Titel: Journal of Molecular Biology
  Alternativer Titel : J. Mol. Biol.
Genre der Quelle: Zeitschrift
 Urheber:
Affiliations:
Ort, Verlag, Ausgabe: -
Seiten: - Band / Heft: 321 (2) Artikelnummer: 1 Start- / Endseite: 235 - 247 Identifikator: -