The Base Pair Directory

GG base pairs with two standard hydrogen bonds
base  potential H-bond donor/acceptor sites

guanine G

G(1da3)

N3...
C2
N2-H...

G(dd3)

N1-H...
C2
N2-H...

G(2da3)

O6...
C6
N1-H...

G(aa4)

O6...
C6
C5
N7...

GG base pairs with 4 heavy-atom H-bond donor/acceptor sites
base pair H-bond motif structure images

G(1da3)...G(1da3)

GG N3-amino symmetric
  

N2-H...N3
C2     C2
N3...H-N2
  • Tinoco compilation: 
    • yes (GG N3-amino symmetric) 
  • Westhof compilation: 
    • no 
  • Jeffrey/Saenger compilation: 
    • yes (GG4) 
PDF | VRML

G(2da3)...G(2da3)

GG N1-carbonyl symmetric
  

O6...H-N1
C6     C6
N1-H...O6
  • Tinoco compilation: 
    • yes (GG N1-carbonyl symmetric) 
  • Westhof compilation: 
    • no 
  • Jeffrey/Saenger compilation: 
    • yes (GG3) 
PDF | VRML

G(1da3)...G(2da3)

GG N3-N1, amino-carbonyl
  

N3...H-N1
C2     C6
N2-H...O6
  • Tinoco compilation: 
    • no 
  • Westhof compilation: 
    • no 
  • Jeffrey/Saenger compilation: 
    • no 
PDF | VRML

1G(dd3)...G(aa4)

N7-N1, carbonyl-amino
  

N2-H...O6
C2     C6
|      C5
N1-H...N7
  • Tinoco compilation: 
    • yes (GG N7-N1, carbonyl amino) 
  • Westhof compilation: 
  • Jeffrey/Saenger compilation: 
    • yes (GG1) 
PDF | VRML

2G(dd3)...G(aa4)

N7-amino, N1-carbonyl
  

N2-H...N7
C2     C6
|      C5
N1-H...O6
  • Tinoco compilation: 
    • yes (GG N7-amino, N1-carbonyl) 
  • Westhof compilation: 
  • Jeffrey/Saenger compilation: 
    • yes (GG2) 
PDF | VRML

GG base pairs with 3 heavy-atom H-bond donor/acceptor sites
base pair H-bond motif structure images

G(aa4)...G(N2-H1/H2), N7-N1 cis

GG, amino-carbonyl, amino-N7, N7-N1 cis 

O6...H1
C6   | 
C5   N2
N7...H2
  • Tinoco compilation: 
    • no 
  • Westhof compilation: 
  • Jeffrey/Saenger compilation: 
    • no 
PDF | VRML

G(aa4)...G(N2-H1/H2), N7-N1 trans

GG, amino-carbonyl, amino-N7, N7-N1 trans 

O6...H1
C6   |
C5   N2
N7...H
  • Tinoco compilation: 
    • no 
  • Westhof compilation: 
  • Jeffrey/Saenger compilation: 
    • no 
PDF | VRML