>gnl|CDD|162854 TIGR02432, lysidine_TilS_N, tRNA(Ile)-lysidine synthetase, N-terminal domain. The only examples in which the wobble position of a tRNA must discriminate between G and A of mRNA are AUA (Ile) vs. AUG (Met) and UGA (stop) vs. UGG (Trp). In all bacteria, the wobble position of the tRNA(Ile) recognizing AUA is lysidine, a lysine derivative of cytidine. This family describes a protein domain found, apparently, in all bacteria in a single copy. Eukaryotic sequences appear to be organellar. The domain archictecture of this protein family is variable; some, including characterized proteins of E. coli and B. subtilis known to be tRNA(Ile)-lysidine synthetase, include a conserved 50-residue domain that many other members lack. This protein belongs to the ATP-binding PP-loop family ( pfam01171). It appears in the literature and protein databases as TilS, YacA, and putative cell cycle protein MesJ (a misnomer). Length = 189

 Score =  175 bits (446), Expect = 2e-44
 Identities = 71/192 (36%), Positives = 94/192 (48%), Gaps = 9/192 (4%)

Query: 21  HILVAVSGGSDSMGLLIALHSVLSDRSFGKIKFSAISVDHCLRETAKDEVRYVSDVCSRL 80
            ILVAVSGG DSM LL   H +L  +   KI+  A  VDH LR  + +E  +V   C +L
Sbjct: 1   RILVAVSGGVDSMALL---HLLLKLQPKLKIRLIAAHVDHGLRPESDEEAEFVQQFCKKL 57

Query: 81  RIAHSVVSWKNSKPQ----TGLMAAAREARYALISEHAKTINATLIMTAHTFDDQLETVY 136
            I   +               L  AAREARY    E AK   A  I+TAH  DDQ ET+ 
Sbjct: 58  NIPLEIKKVDVKALAKGKKKNLEEAAREARYDFFEEIAKKHGADYILTAHHADDQAETIL 117

Query: 137 MRSQRDYAEKGMGLSGMCDTILYDLNLWISRPFLRCRREDIRSFLLQRNISWCEDPSNTD 196
           +R  R    +G  LSGM    +      I RP L   + +I  +L +  + W ED +N D
Sbjct: 118 LRLLRGSGLRG--LSGMKPIRILGNGGQIIRPLLGISKSEIEEYLKENGLPWFEDETNQD 175

Query: 197 DRFERVRVRRFV 208
           D++ R R+R  +
Sbjct: 176 DKYLRNRIRHEL 187