2irf

CRYSTAL STRUCTURE OF AN IRF-2/DNA COMPLEX.

spinqualitylabelsall models 2irf, resolution 2.20Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2irf is a 12 chain structure with sequence from Mus musculus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.2Å Ligands: 5IU, K Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function IRF2_MOUSE Specifically binds to the upstream regulatory region of type I IFN and IFN-inducible MHC class I genes (the interferon consensus sequence (ICS)) and represses those genes. Also acts as an activator for several genes including H4 and IL7. Constitutively binds to the ISRE promoter to activate IL7. Involved in cell cycle regulation through binding the site II (HiNF-M) promoter region of H4 and activating transcription during cell growth. Antagonizes IRF1 transcriptional activation. Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMed There has been growing interest in the role of the IRF (interferon regulatory factor) family of transcription factors in the regulation of immune responses, cytokine signaling, and oncogenesis. These members are characterized by their well-conserved DNA binding domains at the N-terminal regions. Here we report the 2.2 A resolution crystal structure of the DNA binding domain of one such family member, IRF-2, bound to DNA. The structure reveals its recognition sequence, AANNGAAA (here, recognized bases are underlined and in bold, and N indicates any base), and its cooperative binding to a tandem repeat of the GAAA core sequence induced by DNA structure distortions. These facts explain well the diverse binding properties of the IRF family members, which bind to both single and tandemly repeated sequences. Furthermore, we also identified the 'helix-hairpin-strand motif' at the C terminus of the recognition helix as a metal binding site that is commonly found in certain classes of DNA-interactive proteins. Our results provide new insights into the structure and function of this family of transcription factors. Crystal structure of an IRF-DNA complex reveals novel DNA recognition and cooperative binding to a tandem repeat of core sequences.,Fujii Y, Shimizu T, Kusumoto M, Kyogoku Y, Taniguchi T, Hakoshima T EMBO J. 1999 Sep 15;18(18):5028-41. PMID:10487755 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Interferon regulatory factor

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