[SP]_[PF07660]_[PF13715]_[PF07715]_[PF00593]_[TM]

    [SP]_[72:PF07660]_[134:PF13715]_[223:PF07715]_[539:PF00593]_[TM]

    [SP]_[71:IPR011662]_[72:IPR011662]_[132:IPR008969]_[223:IPR012910]_[539:IPR000531]_[TM]
    

Looking for similar signatures in the working genomes

PF07660:STN. Secretin and TonB N terminus short domain

PF13715:CarbopepD_reg_2. CarboxypepD_reg-like domain

PF07715:Plug. TonB-dependent Receptor Plug Domain

PF00593:TonB_dep_Rec_b-barrel. TonB dependent receptor-like, beta-barrel