2cg4 | pdb_00002cg4
STRUCTURE OF E.COLI ASNC
Structural highlights
Function[ASNC_ECOLI] Activator of asnA transcription; autogenous regulator of its own transcription; and repressor of the expression of gidA at a post-transcriptional level.[1] [2] [3] 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 PubMedThe Lrp/AsnC family of transcriptional regulatory proteins is found in both archaea and bacteria. Members of the family influence cellular metabolism in both a global (Lrp) and specific (AsnC) manner, often in response to exogenous amino acid effectors. In the present study we have determined both the first bacterial and the highest resolution structures for members of the family. Escherichia coli AsnC is a specific gene regulator whose activity is triggered by asparagine binding. Bacillus subtilis LrpC is a global regulator involved in chromosome condensation. Our AsnC-asparagine structure is the first for a regulator-effector complex and is revealed as an octameric disc. Key ligand recognition residues are identified together with a route for ligand access. The LrpC structure reveals a stable octamer supportive of a topological role in dynamic DNA packaging. The structures yield significant clues to the functionality of Lrp/AsnC-type regulators with respect to ligand binding and oligomerization states as well as to their role in specific and global DNA regulation. Structural insight into gene transcriptional regulation and effector binding by the Lrp/AsnC family.,Thaw P, Sedelnikova SE, Muranova T, Wiese S, Ayora S, Alonso JC, Brinkman AB, Akerboom J, van der Oost J, Rafferty JB Nucleic Acids Res. 2006 Mar 9;34(5):1439-49. Print 2006. PMID:16528101[4] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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