Premium
Bending of DNA by transcription factors
Author(s) -
van der Vliet Peter C.,
Verrijzer C. Peter
Publication year - 1993
Publication title -
bioessays
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.175
H-Index - 184
eISSN - 1521-1878
pISSN - 0265-9247
DOI - 10.1002/bies.950150105
Subject(s) - transcription (linguistics) , general transcription factor , dna , transcription factor , eukaryotic transcription , microbiology and biotechnology , rna polymerase ii , transcription bubble , biology , biophysics , genetics , promoter , chemistry , rna polymerase , gene , rna , gene expression , philosophy , linguistics
An increasing number of transcription factors both from prokaryotic and eukaryotic sources are found to bend the DNA upon binding to their recognition site. Bending can easily be detected by the anomalous electrophoretic behaviour of the DNA‐protein complex or by increased cyclization of DNA fragments containing the protein‐induced bend. Induction of DNA bending by transcription factors could regulate transcription in various ways. Bending may bring distantly bound transcription factors closer together by facilitating DNA‐looping or it could mediate the interaction between transcription factors and the general transcription machinery by formation of large nucleoprotein structures in which the DNA is wrapped around the protein complex. Alternatively, the energy stored in a protein‐induced bend could be used to favour formation of an open transcription complex or to dissociate the RNA polymerase in the transition from initiation to elongation. Modification of the bend angles and bending centers, caused by homodimerization or heterodimerization of transcription factors, may well turn out to be an important way to enlarge the range of interactions required for regulation of gene expression.