┌───────────────────────────────────── Escherichia coli MS 21-1   
│                                            ┌─ Escherichia coli (8-235/235) CFT073 (11)  
│                                           ┌┴───────────── Escherichia coli H299   
│                                          ┌┴─ Escherichia coli (8-235/235) 536   
│                             ┌────────────┴────────────┬───────────── Escherichia coli NC101   
│                ┌────────────┤                         └─ Escherichia coli APEC O1 (7)  
┤               ┌┤            └───────────── Escherichia coli M605   
│  ┌────────────┤└─ Escherichia coli SE15   
│  │            └─────────────────────────┬───────────── Escherichia coli SMS-3-5   
│  │                                      └┬─ Escherichia coli K12 (10)  
│ ┌┤                                       └────────────┬───────────── Escherichia coli 101-1   
│ ││                                                    └─ Escherichia coli M718 (1)  
│ │└────────────┬────────────────────────── Escherichia coli TA280   
└─┤             └─ Escherichia coli (8-235/235) E2348/69 (1)  
  │             ┌─ Escherichia coli B354   
  │┌────────────┴───────────── Escherichia coli TA143   
  └┤┌─ Escherichia coli MS 116-1 (3)  
   └┤┌───────────── Escherichia coli FVEC1302 (4)  
    ││                          ┌─ Escherichia coli 1044A (21)  
    └┤             ┌────────────┴─ Escherichia coli O157:H7 EDL933  [2] 
     │┌────────────┴─ Escherichia coli B185 (1)  
     ││              ┌───────────── Escherichia coli H736 (1)  
     └┤             ┌┴───────────── Escherichia coli KO11 (2)  
      │            ┌┴─ Escherichia coli B7A (7)  
      └────────────┤             ┌─ Escherichia coli B str. REL606 (2)  
                   └────────────┬┴───────────── Escherichia coli OP50   
                                └────────────┬─ Escherichia coli (8-235/235) 042 (16)  
                                             └────────────┬───────────── Escherichia coli MS 107-1   
                                                          └─ Escherichia coli (8-235/235) B088 (9)  
  
RNA methyltransferase, TrmH family, group 1 (29)