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Table 1 Amino acids that form salt bridges in AQN, VPR and SPRK

From: Highly conserved salt bridge stabilizes a proteinase K subfamily enzyme, Aqualysin I, from Thermus aquaticus YT-1

  AQN (4DZT) VPR (1SH7) SPRK (2B6N)
Common Arg12-Asp183 Arg10-Asp183 Arg12-Asp187
  Asp58-Arg95 Asp56-Arg95 Asp58-Arg97
  Asp138-Arg169 Asp138-Arg169 Asp140-Arg171
Intrinsic to VPR or SPRK   Asp59-Arg95 Asp61-Arg97
   Arg185-Asp260 Arg187-Asp264
   Glu236-Arg252 Asp240-Arg256
   Arg14-Asp274 Asp2-His25
    Asp198-Lys254
Intrinsic to AQN Asp17-Arg259   
  Arg31-Glu237   
  Arg43-Asp212