Table 4 Genes involved in Fe resistance in B. amyloliquefaciens strain Bam1 and B. velezensis strain FZB42

fur

2,334,984–2,335,433

2,252,893–2,253,342

Fur family transcriptional regulator of iron homoeostasis; sensor of Fe sufficiency; Fe uptake and efflux system regulator

98.00

perR

839,146–839,583

874,037–874,474

Fur family transcriptional regulator; peroxide stress response regulator; iron storage

96.35

efeB

3,696,580–3,697,836

3,655,884–3,657,140

Deferrochelatase/peroxidase EfeB; converts ferrous iron (Fe²⁺) to ferric iron (Fe³⁺) for uptake by EfeO–EfeU, peroxide detoxification under microaerobic conditions; heme peroxidase in elemental iron uptake;

93.95

efeO

3,697,856–3,699,007

3,657,159–3,657,395

Elemental iron uptake system (binding protein); high affinity uptake of ferric iron (Fe³⁺);

91.18

efeU

3,699,004–3,700,452

–

Elemental iron uptake system (permease); high-affinity iron transporter; ferric iron (Fe³⁺) uptake protein

–

feuA

182,176–183,132

187,111–188,067

ABC transporter for the siderophores Fe–enterobactin and Fe–bacillibactin (binding protein); acquisition of iron

96.13

feuB

181,149–182,156

186,084–187,091

ABC transporter for the siderophores Fe–enterobactin and Fe–bacillibactin (integral membrane protein); iron complex transport system permease protein; acquisition of iron

96.92

feuC

180,137–181,156

185,072–186,091

ABC transporter for the siderophores Fe–enterobactin and Fe–bacillibactin (integral membrane protein); iron complex transport system permease protein; acquisition of iron

93.33

fhuB

3,208,964–3,210,028

3,155,718–3,156,782

Hydroxamate siderophore ABC transporter (ATP-binding protein) (ferrichrome and ferrioxamine); siderophore uptake

94.37

fhuC

3,207,132–3,207,935

3,153,886–3,154,689

Hydroxamate siderophore ABC transporter (ATP-binding protein) (ferrichrome and ferrioxamine); siderophore uptake

94.53

fhuD

3,210,250–3,211,188

3,157,003–3,157,941

Hydroxamate siderophore ABC transporter (ATP-binding protein) (ferrichrome und ferrioxamine); siderophore uptake

95.53

fhuG

3,207,954–3,208,964

3,154,709–3,155,718

Hydroxamate siderophore ABC transporter (ATP-binding protein) (ferrichrome und ferrioxamine); siderophore uptake

93.37

yxeB

3,812,989–3,813,951

3,762,505–3,763,467

Hydroxamate siderophore ABC transporter; siderophore uptake

93.57

fpbN/yclN

384,472–385,425

403,591–404,544

Petrobactin ABC transporter (permease); acquisition of iron

94.97

fpbO/yclO

385,415–386,362

404,534–405,481

Petrobactin ABC transporter (permease); acquisition of iron

96.41

fpbP/yclP

386,356–387,114

405,475–406,233

Petrobactin ABC transporter (ATP-binding protein); acquisition of iron

95.13

fpbQ/yclQ

387,136–388,086

406,255–407,199

Petrobactin ABC transporter (binding protein); acquisition of iron

95.90

fecC/yvrB

3,197,604–3,198,650

3,144,353–3,145,399

Iron/citrate ABC transporter (binding protein); iron uptake

95.03

yhfQ

1,003,083–1,003,943

1,032,074–1,032,952

Iron/citrate ABC transporter (solute-binding protein); iron uptake

86.05

fetB/yjkA

1,231,201–1,231,962

1,202,052–1,202,813

Iron export ABC transporter permease subunit FetB; iron export

93.44

pfeT/zntA/zosA

1,370,249–1,372,162

1,321,623–1,323,536

Fe²⁺/Zn²⁺/Cd²⁺-exporting ATPase; cation efflux

91.54