PMID: 16415882 , Related PDB id: 2C62

Authors:

Werten S, Moras D

Title:

A global transcription cofactor bound to juxtaposed strands of unwound DNA.

Journal:

Nat Struct Mol Biol. 2006 Feb;13(2):181-2. Epub 2006 Jan 15.

Abstract:

The 1.74-A crystal structure of the human transcription cofactor PC4 in complex with a single-stranded 20-mer oligonucleotide reveals how symmetry-related beta-surfaces of the protein homodimer interact with juxtaposed 5-nucleotide DNA regions running in opposite directions. The structure explains high-affinity binding of PC4 to the complementary strands of unwinding duplex DNA, and it suggests the cofactor may have a role in relaxing negative supercoils or exposing unpaired bases for sequence-specific recognition by other biomolecules.