Table 4 Analysis of the flanking regions of dfrB1 to dfrB7 (left panel) and dfrB variants with indices >8 (right panel).

From: Trimethoprim resistance in surface and wastewater is mediated by contrasting variants of the dfrB gene

Gene

Origin of read

Superfamily

Putative function

IS

Gene

Origin of read

Superfamily

Putative function

IS

dfrB1

Wi (DE)

DNA_BRE_C

integron integrase

+

dfrB9

Rw (DE)

no significant alignment

dfrB1

Wi (DE)

DNA_BRE_C

integron integrase

+

dfrB9

Rs (DE)

no significant alignment

dfrB1

Wi (DE)

DNA_BRE_C

integron integrase

+

dfrB9

Rs (DE)

no significant alignment

dfrB1

Wi (NZ)

Ybx1

class D betalactamase

dfrB9

Rs (DE)

no significant alignment

dfrB1

Wi (DE)

DNA_BRE_C

integron integrase

+

dfrB9

Rs (DE)

no significant alignment

dfrB1

Wi (DE)

DNA_BRE_C

integron integrase

+

dfrB10

Rs (DE)

CoxL

xanthine dehydrogenase

dfrB1

Wi (DE)

DNA_BRE_C

integron integrase

+

dfrB10

Rs (DE)

isoprenylcysteine carboxymethyltransferase

dfrB1

Wi (DE)

N6_acetyl_AAC6

aminoglycoside acetyltransferase

dfrB10

Rs (DE)

BrnT_toxin

BrnA antitoxin

dfrB1

Wi (DE)

ANT_3pp_9_crypt

aminoglycoside nucleotidyltransferase

+

dfrB10

Rs (DE)

CoxL

xanthine dehydrogenase

dfrB2

We (UK)

EamA

multidrug efflux pump

+

dfrB10

Rs (UK)

PRK08270

ribonucleoside triphosphate reductase

dfrB2

Wi (NZ)

hypothetical protein

dfrB10

Rs (NZ)

hypothetical protein

dfrB2

We (UK)

RT_like

reverse transcriptase/maturase

dfrB10

Rs (DE)

Yads

trimeric intracellular cation channel

dfrB3

We (UK)

DNA_BRE_C

aminoglycoside resistance

+

dfrB10

Rs (DE)

hypothetical protein

dfrB3

Wi (NZ)

YbxI

class D betalactamase

dfrB10

Rs (DE)

PKc-like

phosphotransferase

dfrB3

Wi (NZ)

hypothetical protein

+

dfrB10

Rs (DE)

VapI

addiction module antidote

dfrB3

We (UK)

EamA

multidrug efflux pump

+

dfrB10

Rs (DE)

VapI

addiction module antidote

dfrB3

Wi (DE)

DUF1010

plasmid-encoded protein of unknown function

dfrB10

Rs (DE)

BrnA antitoxin

dfrB3

We (UK)

EamA

multidrug efflux pump

+

dfrB10

Rw (CN)

reverse transcriptase

dfrB3

We (UK)

EamA

multidrug efflux pump

+

dfrB10

Rs (DE)

isoprenylcysteine carboxymethyltransferase

dfrB3

We (UK)

EamA

multidrug efflux pump

+

dfrB10

Rs (DE)

PKc-like

phosphotransferase

dfrB3

We (UK)

EamA

multidrug efflux pump

+

dfrB10

Rs (DE)

isoprenylcysteine carboxymethyltransferase

dfrB3

We (UK)

EamA

multidrug efflux pump

+

dfrB10

Rs (DE)

oxidoreductase

dfrB3

We (UK)

EamA

multidrug efflux pump

+

dfrB10

Rs (DE)

VapI, ParE_toxin

addiction module antidote

dfrB4

Rw (CN)

DNA_BRE_C

integron integrase

+

dfrB10

Rs (DE)

PKc-like

phosphotransferase

dfrB4

Wi (DE)

EamA

multidrug efflux pump

dfrB10

Rw (NZ)

Ggt

gamma-glutamyltransferase

dfrB4

We (UK)

no significant alignment

dfrB10

Rs (NZ)

Imm6, DUF2486

deaminase reductase

dfrB4

We (UK)

DNA_BRE_C

aminoglycoside resistance

+

dfrB10

We (US)

hypothetical protein

dfrB4

Wi (DE)

DNA_BRE_C

integron integrase

+

dfrB14

Rs (DE)

HP

histidine phosphatase

dfrB4

Rw (CN)

LbetaH

acetyltransferase

dfrB15

Rs (DE)

hypothetical protein

dfrB5

Wi (DE)

aminoglycoside acetyltransferase

dfrB15

Rs (DE)

SSP160

N-acetylmuramoyl-L-alanine amidase

dfrB5

Wi (US)

transpeptidase

ext. spect. class A betalactamase

+

     

dfrB7

Wi (DE)

N6_acetyl_AAC6

aminoglycoside acetyltransferase

     

dfrB7

Wi (DE)

N6_acetyl_AAC6, EamA

aminoglycoside acetyltransferase

     
  1. Listed are protein superfamilies, if conserved domains were detected by BLASTX, as well as associated functions. The column “IS” indicates the detection (+) or absence (−) of signatures of the TnAs3 transposon by a BLASTN search. See the Table S7 for an extended version of this table holding accession numbers as well as information the length of assemblies and the quality of hits.
  2. Wi WWTP influent, We WWTP effluent, Rw River water, Rs River sediment.