1CGP image
Deposition Date 1991-08-12
Release Date 1994-01-31
Last Version Date 2024-02-07
Entry Detail
PDB ID:
1CGP
Keywords:
TRANSCRIPTION/DNA
Title:
CATABOLITE GENE ACTIVATOR PROTEIN (CAP)/DNA COMPLEX + ADENOSINE-3',5'-CYCLIC-MONOPHOSPHATE
Biological Source:
Source Organism:
synthetic construct (Taxon ID: 32630)
Escherichia coli (Taxon ID: 562)
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
3.00 Å
R-Value Work:
0.23
Space Group:
C 2 2 21
1CGP validation report
Macromolecular Entities
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:PROTEIN (CATABOLITE GENE ACTIVATOR PROTEIN (CAP))
Gene (Uniprot):crp
Chain IDs:E (auth: A), F (auth: B)
Chain Length:205
Number of Molecules:2
Biological Source:Escherichia coli
UniProt ID:P0ACJ8 Pfam ID:PF00027, PF13545
Polymer Type:polydeoxyribonucleotide
Molecule:DNA (5'-D(*GP*CP*GP*AP*AP*AP*AP*GP*TP*GP*TP*GP*AP*CP*AP*TP*AP*T)-3')
Chain IDs:A (auth: C), C (auth: E)
Chain Length:18
Number of Molecules:2
Biological Source:synthetic construct
Polymer Type:polydeoxyribonucleotide
Molecule:DNA (5'-D(*GP*TP*CP*AP*CP*AP*CP*TP*TP*TP*TP*CP*G)-3')
Chain IDs:B (auth: D), D (auth: F)
Chain Length:13
Number of Molecules:2
Biological Source:synthetic construct
Ligand Molecules
CMP
Primary Citation
Crystal structure of a CAP-DNA complex: the DNA is bent by 90 degrees.
Science 253 1001 1007 (1991)
PMID: 1653449

Abstact

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.

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Protein

Chemical

Disease

Primary Citation of related structures
1CGP