Multiple sequence alignments of YgaV with other small regulatory proteins bearing an ArsR DNA binding motif: SoxR_Rs, SoxR of Rhodovulum sulfidophilum (UniProtKB accession no. [UPacc] Q8GCH3); SoxR_Ps, SoxR of Pseudaminobacter salicylatoxidans (UPacc Q5ZQN5); SoxR_Pp, SoxR of Paracoccus pantotrophus (GenBank accession no. X79242); NolR_Rm, NolR of Rhizobium meliloti (UPacc P28267); NolR_Rl, NolR of Rhizobium leguminosarum (UPacc O54057); YgaV_Ec, YgaV of E. coli; HlyU_Vc, HlyU of Vibrio cholerae (UPacc P52695); SmtB_S7, SmtB of Synechococcus sp. strain PCC 7942 (UPacc P30340); ZiaR_S3, ZiaR of Synechococcus sp. strain PCC 6803 (UPacc Q55940); ArsR1_Ec, ArsR of E. coli encoded by plasmid R773 (UPacc P15905); ArsR2_Ec, ArsR of E. coli encoded by plasmid IncN R46 (UPacc P52144); ArsR_Ec, ArsR of E. coli encoded by chromosome (UPacc P37309); ArsR_Sa, ArsR of Staphylococcus aureus encoded by plasmid pI258 (UPacc P30338); PagR_Ba, PagR of Bacillus anthracis encoded by plasmid pXO1 (UPacc O31178); CadC_Sa, CadC of Staphylococcus aureus encoded by plasmid pI258 (UPacc P20047). Identical amino acids with YgaV are highlighted in black. Amino acids of the metal recognition site are shown in gray. The putative ArsR HTH is underlined.