摘要
DNA mimic proteins occupy the DNA binding sites of DNA-binding proteins, and prevent these sites from being accessed by DNA. We show here that the Neisseria conserved hypothetical protein DMP19 acts as a DNA mimic. The crystal structure of DMP19 shows a dsDNA-like negative charge distribution on the surface, suggesting that this protein should be added to the short list of known DNA mimic proteins. The crystal structure of another related protein, NHTF (Neisseria hypothetical transcription factor), provides evidence that it is a member of the xenobiotic-response element (XRE) family of transcriptional factors. NHTF binds to a palindromic DNA sequence containing a 5′-TGTNAN11TNACA-3′ recognition box that controls the expression of an NHTF-related operon in which the conserved nitrogen-response protein [i.e. (Protein-PII) uridylyltransferase] is encoded. The complementary surface charges between DMP19 and NHTF suggest specific charge-charge interaction. In a DNA-binding assay, we found that DMP19 can prevent NHTF from binding to its DNA-binding sites. Finally, we used an in situ gene regulation assay to provide evidence that NHTF is a repressor of its down-stream genes and that DMP19 can neutralize this effect. We therefore conclude that the interaction of DMP19 and NHTF provides a novel gene regulation mechanism in Neisseria spps.
原文 | 英語 |
---|---|
頁(從 - 到) | 5718-5730 |
頁數 | 13 |
期刊 | Nucleic Acids Research |
卷 | 40 |
發行號 | 12 |
DOIs | |
出版狀態 | 已發佈 - 7月 2012 |
對外發佈 | 是 |
ASJC Scopus subject areas
- 遺傳學
指紋
深入研究「Neisseria conserved protein DMP19 is a DNA mimic protein that prevents DNA binding to a hypothetical nitrogen-response transcription factor」主題。共同形成了獨特的指紋。資料集
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3VJZ : Crystal structure of the DNA mimic protein DMP19
Wang, H. (Contributor), Wang, A. H. (Contributor) & Ko, T. (Contributor), RCSB-PDB, 2012
DOI: 10.2210/pdb3vjz/pdb, https://www.rcsb.org/structure/3VJZ
資料集: Dataset