| Ferrichrome receptor FiuA | fiuA PA0470 | Q9I648 | 3 |
| Ferrichrome-iron receptor (Ferric hydroxamate receptor) (Ferric hydroxamate uptake) | fhuA tonA b0150 JW0146 | P06971 | 3 |
| Fibronectin type III domain protein | MXAN_4796 | Q1D315 | 3 |
| Fimbrial chaperone (Fimbrial chaperone protein FimC) | focC focC_2 A5958_24190 ACN77_28800 ACN81_11765 AMK83_09775 BHF46_11395 BK373_20355 ERS085379_04793 ERS085386_04307 GJ11_10300 JD73_26070 MJ49_24320 UN86_18260 UN91_25940 | A0A066RDY2 | 3 |
| Flagellar basal body rod protein FlgB | flgB BE932_29575 SY51_05930 | A0A061YDX0 | 3 |
| Flagellar basal-body rod protein FlgC | flgC A4T40_09135 BK334_17180 ECONIH1_06605 MS6198_12070 | A0A0A1A2V5 | 3 |
| Flagellar basal-body rod protein FlgG (Distal rod protein) | flgG PP_4385 | Q88ER8 | 3 |
| Flagellar basal-body rod protein FlgG (Distal rod protein) | flgG ECED1_1222 | B7MTK9 | 3 |
| Flagellar biosynthesis protein FlgL (Flagellar hook protein FlgL) (Flagellar hook-associated protein 3) (Flagellar hook-filament junction protein FlgL) | flgL BK248_11950 BK373_19855 BMT49_08335 ERS085366_02278 MJ49_00740 SY51_05980 | A0A061YDX8 | 3 |
| Flagellar hook protein FlgE | flgE PP_4388 | Q88ER5 | 3 |
| Flagellar hook protein FlgE | flgE BE932_29590 SY51_05945 | A0A066SNC5 | 3 |
| Flagellar hook-associated protein 1 (HAP1) | flgK BE932_29620 SY51_05975 | A0A066SNK8 | 3 |
| Flagellar hook-associated protein 2 (HAP2) (Flagellar cap protein) | fliD PP_4376 | Q88ES7 | 3 |
| Flagellar hook-associated protein 2 (HAP2) (Flagellar cap protein) | fliD Smlt2303 | B2FQU4 | 3 |
| Flagellar hook-associated protein FlgK | flgK PP_4381 | Q88ES2 | 3 |
| Flagellar hook-associated protein FlgL | flgL PP_4380 | Q88ES3 | 3 |
| Flagellar P-ring protein (Basal body P-ring protein) | flgI PA1084 | Q9I4P5 | 3 |
| Flagellin | fliC flaF hag b1923 JW1908 | P04949 | 3 |
| Flagellin | hag BSU35360 | P02968 | 3 |
| Flagellin | fliC PP_4378 | Q88ES5 | 3 |
| Flagellin | fliC | A0A0F3SVQ7 | 3 |
| Flagellin | fliC fliCH28 | A0A0F3UNF4 | 3 |
| Flagellin A | flaA Cj1339c | P56963 | 3 |
| Flagellin B | flaB Cj1338c | P56964 | 3 |
| Flavin-containing monooxygenase | phzS PA4217 | Q9HWG9 | 3 |
| FlgM | flgM PA3351 | Q9HYP5 | 3 |
| Formate C-acetyltransferase (Formate acetyltransferase 1) (Pyruvate formate-lyase) (EC 2.3.1.54) | pflB ACU90_17935 BE957_19825 BK334_18015 BK383_04155 BMT97_10320 BUE82_15450 ECONIH1_05765 MS6198_10460 | A0A0A1A6F5 | 3 |
| Formate dehydrogenase-O major subunit (Formate dehydrogenase-O, major subunit) | fdoG PGD_03102 SK85_04224 | A0A024L6U0 | 3 |
| Formate dehydrogenase-O, large subunit (EC 1.2.1.2) | fdoG ECED1_4597 | B7N2N7 | 3 |
| Fumarate hydratase class I (EC 4.2.1.2) | BE932_03460 SY51_09005 | A0A066SZL6 | 3 |
| Fumarate hydratase class II (Fumarase C) (EC 4.2.1.2) (Aerobic fumarase) (Iron-independent fumarase) | fumC Cj1364c | O69294 | 3 |
| Fumarate reductase flavoprotein subunit (EC 1.3.5.4) | frdA BW690_00480 PGD_03338 | A0A024L7L9 | 3 |
| G/U mismatch-specific DNA glycosylase (EC 3.2.2.28) (Double-strand-specific uracil glycosylase) (Mismatch-specific uracil DNA-glycosylase) (MUG) | mug EcSMS35_3362 | B1LF61 | 3 |
| GalU regulator GalF (UTP--glucose-1-phosphate uridylyltransferase) | BE932_07670 BET08_08595 SY51_11845 | A0A066T4J1 | 3 |
| Gamma-glutamyltranspeptidase | ggt FTN_1159 | A0Q730 | 3 |
| Glucohydrolase (Trehalose-6-phosphate hydrolase) (EC 3.2.1.93) | BE932_21720 SY51_24410 | A0A061KF91 | 3 |
| Glucose-1-phosphate thymidylyltransferase (EC 2.7.7.24) | rmlA BE932_07650 BET08_08610 SY51_11830 | A0A066SZW0 | 3 |
| Glucose-6-phosphate 1-dehydrogenase (G6PD) (EC 1.1.1.49) | zwf PA3183 | O68282 | 3 |
| Glucose-6-phosphate 1-dehydrogenase (G6PD) (EC 1.1.1.49) | zwf BW690_20570 PGD_01378 | A0A024L2H1 | 3 |
| Glutamate / aspartate ABC transporter-periplasmic binding protein (EC 3.6.3.21) | gltI PP_1071 | Q88NY2 | 3 |
| Glutamate 5-kinase (EC 2.7.2.11) (Gamma-glutamyl kinase) (GK) | proB A4T40_04695 BK248_22745 BK334_06595 ECONIH1_01380 MS6198_02820 | A0A0A1A1I1 | 3 |
| Glutamate--tRNA ligase (EC 6.1.1.17) (Glutamyl-tRNA synthetase) (GluRS) | gltX HMPREF3040_04863 | A0A0B5HIL6 | 3 |
| Glutamate-1-semialdehyde 2,1-aminomutase (GSA) (EC 5.4.3.8) (Glutamate-1-semialdehyde aminotransferase) (GSA-AT) | hemL PA3977 | P48247 | 3 |
| Glutaminase-asparaginase (EC 3.5.1.38) (L-ASNase/L-GLNase) (L-asparagine/L-glutamine amidohydrolase) | ansB PP_2453 | Q88K39 | 3 |
| Glutamine synthetase (GS) (EC 6.3.1.2) (Glutamate--ammonia ligase) (Glutamine synthetase I beta) (GSI beta) | glnA Z5406 ECs4792 | P0A9C7 | 3 |
| Glutamyl-tRNA(Gln) amidotransferase subunit A (Glu-ADT subunit A) (EC 6.3.5.7) | gatA PA4483 | Q9HVT8 | 3 |
| Glutamyl-tRNA(Gln) amidotransferase subunit A (Glu-ADT subunit A) (EC 6.3.5.7) | gatA spr0394 | Q8DR10 | 3 |
| Glutaredoxin | PA3533 | Q9HY77 | 3 |
| Glutaredoxin (Glutaredoxin 2) (Glutaredoxin, GrxB family) (Glutaredoxin-2) | grxB A4T40_09085 BK334_17230 ECONIH1_06555 MS6198_11970 | A0A0A1A2U9 | 3 |
| Glutaredoxin 4 (Grx4) (Monothiol glutaredoxin) | grxD ydhD Z2676 ECs2363 | P0AC71 | 3 |
| Glutaryl-CoA dehydrogenase | gcdH PA0447 | Q9I671 | 3 |
| Glutathione reductase (EC 1.8.1.7) (Glutathione-disulfide reductase) | BE932_16480 SY51_19960 | A0A066T551 | 3 |
| Glutathione synthetase (EC 6.3.2.3) (GSH synthetase) (GSH-S) (GSHase) (Glutathione synthase) | gshB BE932_12850 SM09_03106 SY51_16550 | A0A0J3VSS8 | 3 |
| Glutathione transferase GstA | BET08_08265 BK337_09385 BUE81_02335 | A0A0A6RYT3 | 3 |
| Glyceraldehyde-3-phosphate dehydrogenase (EC 1.2.1.-) | LMRG_01789 | A0A0H3GFI9 | 3 |
| Glyceraldehyde-3-phosphate dehydrogenase 1 (GAPDH) (EC 1.2.1.12) (NAD-dependent glyceraldehyde-3-phosphate dehydrogenase) | gapA gap BSU33940 | P09124 | 3 |
| Glycerol kinase 2 (EC 2.7.1.30) (ATP:glycerol 3-phosphotransferase 2) (Glycerokinase 2) (GK 2) | glpK2 glpK glpK1 PA3582 | Q51390 | 3 |
| Glycerol-3-phosphate dehydrogenase (EC 1.1.5.3) | glpD BE932_16085 SY51_19575 | A0A066SN12 | 3 |
| Glycine cleavage system H protein 1 | gcvH1 PA2446 | Q9I136 | 3 |
| Glycine cleavage system H protein 2 | gcvH2 PA5214 | Q9HTX6 | 3 |
| Glycine-glutamate dipeptide porin (EC 3.4.21.-) | opdP PP_0883 | Q88PG7 | 3 |
| Glycosyl hydrolase family 3 | bglX FTN_1474 | A0Q7X6 | 3 |
| Group A colicin translocation tolQ protein | tolQ FTN_0352 | A0Q4U3 | 3 |
| GTP cyclohydrolase 1 (EC 3.5.4.16) (GTP cyclohydrolase I) (GTP-CH-I) | folE EcE24377A_2449 | A7ZNX6 | 3 |
| GTP cyclohydrolase-2 (EC 3.5.4.25) (GTP cyclohydrolase II) | ribA EcE24377A_1479 | A7ZL97 | 3 |
| GTPase Der (GTP-binding protein EngA) | der BV389_04925 UN91_26610 | A0A0F3U1Y3 | 3 |
| GTPase Era | era_3 era A4T40_18115 BK334_05090 ECONIH1_14960 MS6198_28980 | A0A0A1AB57 | 3 |
| Hemolysin A (EC 4.6.1.1) | hlyA UTI89_C4926 | Q1R2T5 | 3 |
| Histidine acid phosphatase | FTN_0022 | A0Q3W8 | 3 |
| Histidine ammonia-lyase (Histidase) (EC 4.3.1.3) | hutH MXAN_3465 | Q1D6R1 | 3 |
| Histidine biosynthesis bifunctional protein HisB [Includes: Imidazoleglycerol-phosphate dehydratase (IGPD) (EC 4.2.1.19); Histidinol-phosphatase (EC 3.1.3.15)] | hisB BE932_07570 SY51_11750 | A0A066T4D7 | 3 |
| Histidine biosynthesis bifunctional protein HisB [Includes: Imidazoleglycerol-phosphate dehydratase (IGPD) (EC 4.2.1.19); Histidinol-phosphatase (EC 3.1.3.15)] | hisB BHS87_11665 PGD_01194 | A0A024L0G4 | 3 |
| Histidine-specific outer membrane porin D (EC 3.4.21.-) | opdC PP_0799 | Q88PP9 | 3 |
| Holliday junction ATP-dependent DNA helicase RuvA (EC 3.6.4.12) | ruvA EcHS_A1954 | A8A161 | 3 |
| Holo-[acyl-carrier-protein] synthase (Holo-ACP synthase) (EC 2.7.8.7) (4'-phosphopantetheinyl transferase AcpS) | acpS BV389_12490 UN91_26360 | A0A0F3UV86 | 3 |
| Homogentisate 1,2-dioxygenase (HGDO) (EC 1.13.11.5) (Homogentisate oxygenase) (Homogentisic acid oxidase) (Homogentisicase) | hmgA MXAN_2787 | Q1D8L9 | 3 |
| Homolog of E. coli rod shape-determining protein | mreB Cj0276 | Q0PBM9 | 3 |
| Homoserine dehydrogenase (HDH) (EC 1.1.1.3) | hom PA3736 | P29365 | 3 |
| HTH-type transcriptional regulator ArgP | argP iciA EcE24377A_3243 | A7ZR24 | 3 |
| HTH-type transcriptional repressor FabR | yijC fabR AC789_1c43590 | A0A0E1LIN1 | 3 |
| Immunomodulating metalloprotease (EC 3.4.24.-) (IMPa) | impA PA0572 | Q9I5W4 | 3 |
| Inorganic pyrophosphatase (EC 3.6.1.1) (Pyrophosphate phospho-hydrolase) (PPase) | ppa PA4031 | Q9HWZ6 | 3 |
| Inorganic pyrophosphatase (EC 3.6.1.1) (Pyrophosphate phospho-hydrolase) (PPase) | ppa Z5837 ECs5204 | P0A7B0 | 3 |
| Inorganic pyrophosphatase (EC 3.6.1.1) (Pyrophosphate phospho-hydrolase) (PPase) | ppa BHS81_25280 JD73_14775 | A0A085P717 | 3 |
| Inosine-5'-monophosphate dehydrogenase (IMP dehydrogenase) (IMPD) (IMPDH) (EC 1.1.1.205) | guaB A4T50_06025 BE932_10335 BE963_28300 BK375_00755 BK383_22720 BMT94_06480 BUE82_06005 ERS085406_03446 GJ11_16380 SM09_02668 SY51_14410 UC41_13120 WM48_13430 | E2QPX1 | 3 |
| Integrase | A4T50_21330 BE932_29905 BV389_20690 SY51_06255 | E2QKM0 | 3 |
| Integration host factor subunit alpha (IHF-alpha) | ihfA himA EcE24377A_1931 | A7ZMI0 | 3 |
| Iron(3+)-hydroxamate-binding protein YxeB (Ferric hydroxamate uptake protein YxeB) (Iron(III)-hydroxamate-binding protein YxeB) | yxeB BSU39610 HS74BR | P54941 | 3 |
| Iron(III) dicitrate transport protein (FecA) | HP_0686 | O25395 | 3 |
| Iron-regulated outer membrane protein FrpB | frpB NMB1988 | Q9JXL3 | 3 |
| Iron-sulfur cluster carrier protein | UMNK88_2656 | A0A0E0U0C6 | 3 |
| Iron-uptake system-binding protein | feuA BSU01630 | P40409 | 3 |
| Isochorismate synthase MenF (EC 5.4.4.2) (Isochorismate mutase) | menF ACN002_2324 ACN77_21785 AM270_05965 AML07_04270 APZ14_21820 AUS26_02320 BMT53_24690 BMT61_11615 ERS085374_00303 ERS139235_00464 ERS150876_02677 PU06_13010 RG28_10490 WQ89_02490 | A0A086U8E8 | 3 |
| Isocitrate dehydrogenase (EC 1.1.1.42) | icd Cj0531 | Q0PAY5 | 3 |
| Ketol-acid reductoisomerase | ilvC FTN_1040 | A0Q6R2 | 3 |
| Ketol-acid reductoisomerase (NADP(+)) (KARI) (EC 1.1.1.86) (Acetohydroxy-acid isomeroreductase) (AHIR) (Alpha-keto-beta-hydroxylacyl reductoisomerase) (Ketol-acid reductoisomerase type 1) (Ketol-acid reductoisomerase type I) | ilvC Cj0632 | Q9PHN5 | 3 |
| Ketol-acid reductoisomerase (NADP(+)) (KARI) (EC 1.1.1.86) (Acetohydroxy-acid isomeroreductase) (AHIR) (Alpha-keto-beta-hydroxylacyl reductoisomerase) (Ketol-acid reductoisomerase type 1) (Ketol-acid reductoisomerase type I) | ilvC PP_4678 | Q88DZ0 | 3 |
| L-arginine ABC transporter-periplasmic binding subunit (EC 3.6.3.21) | artJ PP_0282 | Q88R52 | 3 |
| L-asparaginase 2 (L-asparaginase II) (EC 3.5.1.1) | ansB ansB_1 A4T40_20190 BE932_12915 BIQ85_16465 BK334_10880 BK383_12685 BMT97_15870 BUE82_03310 ECONIH1_17035 GJ11_19205 MS6198_33080 SK85_03219 SY51_16615 | A0A023LIJ5 | 3 |
| L-glyceraldehyde 3-phosphate reductase | BK400_12380 WR15_10595 | A0A0B1F2D6 | 3 |