1zs4
Structure of bacteriophage lambda cII protein in complex with DNA
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OverviewOverview
The tetrameric cII protein from bacteriophage lambda activates, transcription from the phage promoters P(RE), P(I), and P(AQ) by binding, to two direct repeats that flank the promoter -35 element. Here, we, present the X-ray crystal structure of cII alone (2.8 A resolution) and in, complex with its DNA operator from P(RE) (1.7 A resolution). The, structures provide a basis for modeling of the activation complex with the, RNA polymerase holoenzyme, and point to the key role for the RNA, polymerase alpha subunit C-terminal domain (alphaCTD) in cII-dependent, activation, which forms a bridge of protein/protein interactions between, cII and the RNA polymerase sigma subunit. The model makes specific, predictions for protein/protein interactions between cII and alphaCTD, and, between alphaCTD and sigma, which are supported by previous genetic, studies.
About this StructureAbout this Structure
1ZS4 is a Single protein structure of sequence from Enterobacteria phage lambda. Full crystallographic information is available from OCA.
ReferenceReference
Crystal structure of bacteriophage lambda cII and its DNA complex., Jain D, Kim Y, Maxwell KL, Beasley S, Zhang R, Gussin GN, Edwards AM, Darst SA, Mol Cell. 2005 Jul 22;19(2):259-69. PMID:16039594
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