1cgp | pdb_00001cgp

CATABOLITE GENE ACTIVATOR PROTEIN (CAP)/DNA COMPLEX + ADENOSINE-3',5'-CYCLIC-MONOPHOSPHATE

spinqualitylabelsall models 1cgp, resolution 3.00Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1cgp is a 6 chain structure with sequence from Escherichia coli. The December 2003 RCSB PDB Molecule of the Month feature on Catabolite Activator Protein by David S. Goodsell is 10.2210/rcsb_pdb/mom_2003_12. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: CMP Resources: FirstGlance, OCA, RCSB, PDBsum Function [CRP_ECOLI] This protein complexes with cyclic AMP and binds to specific DNA sites near the promoter to regulate the transcription of several catabolite-sensitive operons. The protein induces a severe bend in the DNA. Acts as a negative regulator of its own synthesis as well as for adenylate cyclase (cyaA), which generates cAMP. 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 The 3 angstrom resolution crystal structure of the Escherichia coli catabolite gene activator protein (CAP) complexed with a 30-base pair DNA sequence shows that the DNA is bent by 90 degrees. This bend results almost entirely from two 40 degrees kinks that occur between TG/CA base pairs at positions 5 and 6 on each side of the dyad axis of the complex. DNA sequence discrimination by CAP derives both from sequence-dependent distortion of the DNA helix and from direct hydrogen-bonding interactions between three protein side chains and the exposed edges of three base pairs in the major groove of the DNA. The structure of this transcription factor--DNA complex provides insights into possible mechanisms of transcription activation. Crystal structure of a CAP-DNA complex: the DNA is bent by 90 degrees.,Schultz SC, Shields GC, Steitz TA Science. 1991 Aug 30;253(5023):1001-7. PMID:1653449 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Catabolite gene activator protein

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