Interaction class
Class:  H-Bb 
Description: Conserved protein-DNA contacts are provided by helix(es) (H) with DNA backbone atoms (Bb).
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SCOP Domain Family Number of structures Number of domains Interaction modes Ax-bend MnG width MnG depth MjG width MjG depth
Leucine zipper domain I
(h.1.3.1)
20 5  H-Bb 
 H-Bb L-Bb 
 L-Bb 
 S-Bb S-Mn 
1.0 11.9 1.5
Transcription factor IIB (TFIIB), core domain
(a.74.1.2)
16 4  H-Bb 
 H-Bb H-Mj L-Bb 
 H-Bb H-Mj L-Bb L-Mj 
 H-Bb L-Bb 
 H-Bb L-Bb L-Mj 
0.3 9.2 3.3
AraC type transcriptional activator
(a.4.1.8)
10 4  H-Bb 
 H-Bb H-Mj 
 H-Bb H-Mj L-Bb 
 H-Bb L-Bb 
0.7 (0.3–1.4)
All SCOP domain families with determined protein-DNA interaction classes
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