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structure nameN-TERMINAL DOMAIN OF THE CI REPRESSOR FROM BACTERIOPHAGE TP901-1 IN COMPLEX WITH THE OL2 OPERATOR HALF-SITE
(CI)
referenceRasmussen et al. Biochemistry 52 6892 2013
sourceLACTOCOCCUS PHAGE TP901-1
experimentX-ray (resolution=2.60, R-factor=0.201)
structural superfamilylambda repressor-like DNA-binding domains;
sequence familyHelixturnhelix;
links to other resourcesNAKB PDBSum PDIdb DNAproDB
protein sequence
interface signatureKSTSQQ

Estimated binding specificities ?

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# IC=4.921 IC/col=0.820 n_of_columns=6 specificity:   
A |   0  20   5   0  85   0
C |   0  15  25  96   6  25
G |  96  26   1   0   5  70
T |   0  35  65   0   0   1
scan!

Dendrogram of similar interfaces ?

matrix format
  
  --QT--STNTVTATSTQTRTETTT----   L                       +2r1j_L    
                                                       +-1 
  ----ATATTTPTTTNT------------   L               +-----3 +6fix_D    
                                                 !     ! 
  ----RTTT--AT--STRG----TT----   L               !     +6chv_D    
                                     +-----------5 
  ----AT--QAAT--SA------------       !           !      +4z5h_A    
                                     !           ! +----2 
  ----STKCQAAT--SA------------   L --6           +-4    +3dnv_B    
                                     !             ! 
  RT--------RG----NT----ETRTYA   L   !             +----7f9h_B    
                                     ! 
  ------SGKGSCQTSTRG----------   L   +------------------6w1a_A    
                                   

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updated Mon Jun 29 17:31:30 2026