1a5j

CHICKEN B-MYB DNA BINDING DOMAIN, REPEAT 2 AND REPEAT3, NMR, 32 STRUCTURES

spinqualitylabelsall models 1a5j Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1a5j is a 1 chain structure with sequence from Gallus gallus. Full experimental information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: Solution NMR Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function MYBB_CHICK Represses v-myb- and c-myb-mediated activation of the mim-1 gene, probably by competing with other myb proteins for binding sites. It is an inhibitory member of the myb family. 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 Double- and triple-resonance heteronuclear NMR spectroscopy have been used to determine the high-resolution solution structure of the minimal B-Myb DNA-binding domain (B-MybR2R3) and to characterize the specific complex formed with a synthetic DNA fragment corresponding to the Myb target site on the Myb-regulated gene tom-1. B-MybR2R3 is shown to consist of two independent protein domains (R2 and R3) joined by a short linker, which have strikingly different tertiary structures despite significant sequence similarities. In addition, the C-terminal region of B-Myb R2 is confirmed to have a poorly defined structure, reflecting the existence of multiple conformations in slow to intermediate exchange. This contrasts with the tertiary structure reported for c-MybR2R3, in which both R2 and R3 have the same fold and the C-terminal region of R2 forms a stable, well-defined helix [Ogata, K., et al. (1995) Nat. Struct. Biol. 2, 309-320]. The NMR data suggest there are extensive contacts between B-MybR2R3 and its DNA target site in the complex and are consistent with a significant conformational change in the protein on binding to DNA, with one possibility being the formation of a stable helix in the C-terminal region of R2. In addition, conformational heterogeneity identified in R2 of B-MybR2R3 bound to the tom-1-A target site may play an important role in the control of gene expression by Myb proteins. Solution structure of the B-Myb DNA-binding domain: a possible role for conformational instability of the protein in DNA binding and control of gene expression.,McIntosh PB, Frenkiel TA, Wollborn U, McCormick JE, Klempnauer KH, Feeney J, Carr MD Biochemistry. 1998 Jul 7;37(27):9619-29. PMID:9657674 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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