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Table 4 Events of selenoprotein loss identified in different bacterial phyla

From: Dynamic evolution of selenocysteine utilization in bacteria: a balance between selenoprotein loss and evolution of selenocysteine from redox active cysteine residues

Phylum/organism Number of selenoproteins Selenoprotein families lost in sister organisms
Deltaproteobacteria   
   Syntrophus aciditrophicus 19 GrdB
   Desulfotalea psychrophila 12 SelW-like, ArsC-like
   Geobacter metallireducens 8 NADH oxidase
   Geobacter sulfurreducens 8 HesB-like, SelW-like
   Desulfuromonas acetoxidans 6 GrdB, ArsC-like
Firmicutes/Clostridia   
   Alkaliphilus metalliredigenes 11 GrdA, GrdB
   Syntrophomonas wolfei 10 FrhD, HdrA
   Carboxydothermus hydrogenoformans 9 GrdA, GrdB, homolog of AhpF N-terminal domain, FrhD, HdrA
   Desulfotomaculum reducens 8 FrhD, HdrA, DsbA-like
   Clostridium difficile 6 SelD, FdhA, GrdA, GrdB
   Moorella thermoacetica 6 SelD, FdhA, HdrA, FrhD
   Thermoanaerobacter tengcongensis 3 SelD, GrdA, GrdB
   Desulfitobacterium hafniense 3 HesB-like
   Clostridium perfringens 2 SelD
Actinobacteria   
   Symbiobacterium thermophilum 12 SelD, HesB-like, SelW-like
   Rubrobacter xylanophilus 5 SelD