NCIt definition : Highly conserved peptide motifs of the HMG-I(Y) proteins that preferentially bind
to the AT-rich minor groove of DNA. The AT hook motif tethers and unwinds the minor
groove of the DNA with very little specificity for the DNA sequence. The AT hook motif
has a narrow DNA recognition surface that is devoid of hydrophobic amino acids and
that does not significantly distort the B-form DNA structure.;