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1cgp
From Proteopedia
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[[Image:1cgp.gif|left|200px]] | [[Image:1cgp.gif|left|200px]] | ||
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'''CATABOLITE GENE ACTIVATOR PROTEIN (CAP)/DNA COMPLEX + ADENOSINE-3',5'-CYCLIC-MONOPHOSPHATE''' | '''CATABOLITE GENE ACTIVATOR PROTEIN (CAP)/DNA COMPLEX + ADENOSINE-3',5'-CYCLIC-MONOPHOSPHATE''' | ||
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[[Category: Shields, G C]] | [[Category: Shields, G C]] | ||
[[Category: Steitz, T A.]] | [[Category: Steitz, T A.]] | ||
| - | [[Category: | + | [[Category: Double helix]] |
| - | [[Category: | + | [[Category: Protein-dna complex]] |
| - | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 12:43:06 2008'' | |
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | |
Revision as of 09:43, 2 May 2008
CATABOLITE GENE ACTIVATOR PROTEIN (CAP)/DNA COMPLEX + ADENOSINE-3',5'-CYCLIC-MONOPHOSPHATE
Overview
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.
About this Structure
1CGP is a Single protein structure of sequence from Escherichia coli. The following page contains interesting information on the relation of 1CGP with [Catabolite Activator Protein]. Full crystallographic information is available from OCA.
Reference
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 Page seeded by OCA on Fri May 2 12:43:06 2008
