| L-threonine 3-dehydrogenase (TDH) (EC 1.1.1.103) | tdh A4T40_25510 BK334_24225 ECONIH1_21120 MS6198_41610 | A0A0A1AAF9 | 3 |
| Lactonizing lipase (EC 3.1.1.3) (Triacylglycerol lipase) | lip lipA PA2862 | P26876 | 3 |
| Large-conductance mechanosensitive channel | mscL PP_4645 | Q88E23 | 3 |
| Lipid A deacylase (EC 3.1.1.77) (LPS 3-O-deacylase) (Outer membrane enzyme) | pagL-II PP_3154 | Q88I47 | 3 |
| Lipid A deacylase (EC 3.1.1.77) (LPS 3-O-deacylase) (Outer membrane enzyme) | pagL-I PP_0737 | Q88PW1 | 3 |
| Lipopolysaccharide biosynthetic protein LpxO2 | lpxO2 PA0936 | Q9I522 | 3 |
| Lipopolysaccharide export system protein LptA | lptA PA4460 | Q9HVV7 | 3 |
| Lipoprotein | osmB E2348C_1475 | B7UR91 | 3 |
| Lipoprotein | BE932_05435 SY51_10560 | A0A061YFP4 | 3 |
| Lipoprotein | A4T40_18310 BK251_07215 BK292_15105 BK334_12765 BMT94_22310 BXT93_09620 ECONIH1_15155 | A0A023LHC8 | 3 |
| Lipoprotein (Putative lipoprotein) | A4T50_02175 ACN87_08960 APU18_08480 BE932_05830 ERS085406_02554 SY51_10960 WM48_09925 | A0A067HRK8 | 3 |
| Lipoprotein required for swarming | yaiW PP_3805 | Q88GB9 | 3 |
| Lipoprotein, Lppl family | PP_5226 | Q88CF5 | 3 |
| Lipoprotein-releasing system ATP-binding protein LolD (EC 3.6.3.-) | lolD E2348C_1209 | B7UPD3 | 3 |
| Lon protease (EC 3.4.21.53) (ATP-dependent protease La) | lon PA1803 | Q9I2T9 | 3 |
| Lon protease (EC 3.4.21.53) (ATP-dependent protease La) | lon c0555 | P0A9M1 | 3 |
| Long-chain fatty acid outer membrane transporter (Long-chain fatty acid transporter) | BE932_09340 SY51_13360 | A0A061L383 | 3 |
| Long-chain fatty acid transport protein (Outer membrane FadL protein) (Outer membrane flp protein) | fadL ttr b2344 JW2341 | P10384 | 3 |
| Long-chain fatty acid transport protein (Outer membrane FadL protein) (Outer membrane flp protein) | fadL Z3608 ECs3227 | Q8XCN6 | 3 |
| Low specificity L-threonine aldolase (Low-specificity L-threonine aldolase) (Threonine aldolase) | ltaE A4T40_08110 BK248_26155 BK334_18400 ECONIH1_05190 MS6198_09970 | A0A0A1A3H6 | 3 |
| LPS biosynthesis protein WbpG | wbpG PA3150 | Q9HZ78 | 3 |
| LPS-assembly lipoprotein LptE | lptE PP_4795 | Q88DN0 | 3 |
| LPS-assembly lipoprotein LptE | lptE Smlt3484 | B2FPR6 | 3 |
| LPS-assembly protein LptD | lptD imp ostA FTN_0558 | A0Q5D8 | 3 |
| Lysine / arginine / ornithine ABC transporter-periplasmic binding protein (EC 3.6.3.21) | argT PP_4486 | Q88EH7 | 3 |
| Lysine decarboxylase 1 (EC 4.1.1.18) (Lysine decarboxylase LdcC) (Lysine decarboxylase, inducible) | cadA A4T40_01970 A4T50_15395 APU18_25275 BE932_20420 BK248_25250 BK334_08360 BK373_03500 ECONIH1_24620 ERS085406_00149 MJ49_08650 MS6198_48510 SY51_23835 WM48_22955 | E2QK23 | 3 |
| Lysine decarboxylase, constitutive (EC 4.1.1.18) | ldcC Ec53638_1623 | A0A0E1T7F7 | 3 |
| Lysine--tRNA ligase (EC 6.1.1.6) (Lysyl-tRNA synthetase) (LysRS) | lysS c3469 | P0A8N4 | 3 |
| Lysophosphatidic acid acyltransferase, LptA | lptA PA0005 | Q9I7C1 | 3 |
| LysR family transcriptional regulator YdcI | ydcI ECRM12581_9730 | A0A023YXB3 | 3 |
| M13 family metallopeptidase | pepO FTN_1186 | A0Q757 | 3 |
| Macrolide 2'-phosphotransferase I (Macrolide 2'-phosphotransferase I Mph(A)) (Macrolide 2'-phosphotransferase Mph(A)) (Macrolide 2-phosphotransferase) (Macrolide 2-phosphotransferase protein, macrolide resistance protein) (Macrolide-phosphotransferase, mph(A)) (Mph(A)) (Mph(A) family macrolide 2'-phosphotransferase) (Mph(A) macrolide 2'-phosphotransferase I) (Phosphotransferase enzyme family protein) | mphA mph(A) mph2 A9R57_28020 ACN77_02565 ACN77_03820 ACN77_19735 APT94_14590 APZ14_31330 AZ95_0038 BE932_01825 BE963_00520 BET08_23470 BJJ90_27660 BK248_28265 BK292_28790 BK334_26695 BK337_25500 BK373_25655 BK375_28440 BK383_16405 BK400_25080 ECONIH1_26770 ERS085366_04054 ERS150873_04753 ETN48_p0083 HMPREF3040_01642 MS6198_B122 orf00017 pCTXM123_C0996_11 pKC394-009 UN86_19875 | Q47396 | 3 |
| Magnesium and cobalt efflux protein CorC | corC Ec53638_0656 | A0A0E1SW84 | 3 |
| Magnesium and cobalt transporter | corA spr0170 | Q8DRE5 | 3 |
| Major outer membrane lipoprotein | oprI PP_2322 | Q88KG8 | 3 |
| Major outer membrane lipoprotein Lpp (Braun lipoprotein) (Murein-lipoprotein) | lpp mlpA mulI b1677 JW1667 | P69776 | 3 |
| Major outer membrane protein (Porin) | porA Cj1259 | P80672 | 3 |
| Major outer membrane protein P.IB (PIB) (Protein IB) (Class 3 protein) (Porin) | porB NMB2039 | P30690 | 3 |
| Malate dehydrogenase (EC 1.1.1.37) | mdh b3236 JW3205 | P61889 | 3 |
| Malate dehydrogenase (EC 1.1.1.37) | mdh Smlt0944 | B2FQL8 | 3 |
| Malate dehydrogenase (EC 1.1.1.37) | mdh EcE24377A_3719 | A7ZSD0 | 3 |
| Malate synthase G (EC 2.3.3.9) | glcB E2348C_3255 | B7UI43 | 3 |
| Malate synthase G (EC 2.3.3.9) | glcB ECRM12581_19065 | A0A023Z2F8 | 3 |
| Maltoporin (Maltose-inducible porin) | lamB E2348C_4351 | B7UPJ7 | 3 |
| Maltose ABC transporter substrate-binding protein MalE (Sugar ABC transporter substrate-binding protein) | malE BE932_19685 SY51_23190 | A0A061KYM2 | 3 |
| Maltose-binding periplasmic protein (MBP) (MMBP) (Maltodextrin-binding protein) | malE b4034 JW3994 | P0AEX9 | 3 |
| MarR-family transcriptional repressor (Transcriptional repressor MprA) | mprA A5958_16620 ACN81_20455 AMK83_10095 ERS085379_00737 UN86_27085 | A0A066RG48 | 3 |
| Membrane protein | BE932_10840 SY51_14895 | A0A061YH68 | 3 |
| Membrane protein (Putative lipoprotein) | A5958_09835 ACN81_24130 AM270_17720 AMK83_06995 AML07_08055 APZ14_07980 AUS26_17040 BMT53_14620 ERS085379_03176 ERS150876_04224 FORC28_5981 RG28_24355 UN86_04585 WQ89_13525 | A0A066R6Q9 | 3 |
| Membrane-bound lytic murein transglycosylase A (EC 4.2.2.n1) (Mlt38) (Murein hydrolase A) | mltA mlt ygdM b2813 JW2784 | P0A935 | 3 |
| Metallopeptidase, M23B subfamily | PP_1622 | Q88ME9 | 3 |
| Methionine ABC transporter, periplasmic binding protein | metQ PP_0112 | Q88RL7 | 3 |
| Methionine import ATP-binding protein MetN 2 (EC 3.6.3.-) | metN2 PA5503 | Q9HT70 | 3 |
| Methionine--tRNA ligase (EC 6.1.1.10) (Methionyl-tRNA synthetase) (MetRS) | metG E2348C_2260 | B7UFD1 | 3 |
| Methionine-binding lipoprotein MetQ | metQ yusA BSU32730 | O32167 | 3 |
| Methyl-accepting chemotaxis protein PA2652 | PA2652 | Q9I0I6 | 3 |
| Methyl-accepting chemotaxis protein PctB | pctB PA4310 | Q9HW91 | 3 |
| Mg(2+) transport ATPase, P-type 2 | mgtA PA4825 | Q9HUY5 | 3 |
| MltA-interacting protein | mipA yeaF b1782 JW1771 | P0A908 | 3 |
| Modulator of drug activity B | mdaB Z4379 ECs3910 | P0AEY7 | 3 |
| Molybdenum cofactor biosynthesis protein B | moaB AC789_1c08160 ACN002_0815 ACN77_24960 ACN81_02245 AML07_09330 APZ14_17870 AUS26_14775 BK251_08035 BK292_21500 BN17_05811 ERS139235_01854 ERS150876_00452 FORC28_4120 HW42_07735 PU06_03865 RG28_00620 WQ89_23285 | J7QYX7 | 3 |
| Molybdenum cofactor biosynthesis protein B | moaB Z1001 ECs0860 | P0AF00 | 3 |
| Molybdochelatase incorporating molybdenum into molybdopterin | mogA CE10_0008 | A0A0E0V085 | 3 |
| Molybdopterin containing oxidoreductase | Cj0264c | Q0PBP1 | 3 |
| Multidrug efflux system | acrA ECED1_0486 | B7MQH8 | 3 |
| Multifunctional CCA protein [Includes: 2'-nucleotidase (EC 3.1.3.-); 2',3'-cyclic phosphodiesterase (EC 3.1.4.-); CCA-adding enzyme (EC 2.7.7.72) (tRNA nucleotidyltransferase) (CCA tRNA nucleotidyltransferase) (tRNA adenylyl-/cytidylyl-transferase) (tRNA CCA-pyrophosphorylase) (tRNA-NT); Phosphatase] | cca BE932_14180 SY51_17725 | A0A066SX66 | 3 |
| Multifunctional fusion protein [Includes: DNA-directed RNA polymerase subunit; DNA-directed RNA polymerase subunit beta (EC 2.7.7.6)] | TTRE_0000800301 | A0A077ZM27 | 3 |
| N-6 DNA methylase | SY51_01550 | A0A066SWZ8 | 3 |
| N-acetyl-D-glucosamine kinase (EC 2.7.1.59) (GlcNAc kinase) | nagK BE932_29810 SY51_06160 | A0A061L1N0 | 3 |
| N-acetylglucosamine-6-phosphate deacetylase (EC 3.5.1.25) | nagA nagA_1 A4T40_06985 A4T50_18240 APT94_14370 APU18_23680 BE932_26975 BE963_17530 BK248_02830 BK334_19080 BK373_00070 BMT49_04940 BMT91_15565 BMT97_22520 ECONIH1_03820 ERS085406_01622 GJ11_03675 HMPREF3040_04637 MJ49_03225 MS6198_07300 SM09_01486 SY51_03400 WM48_03495 | A0A061KPP8 | 3 |
| N-acetylmuramoyl-L-alanine amidase | amiB PA4947 | Q9HUL7 | 3 |
| N-acetylmuramoyl-L-alanine amidase (EC 3.5.1.28) | amiC PP_4897 | Q88DD0 | 3 |
| N-acetylmuramoyl-L-alanine amidase (N-acetylmuramoyl-L-alanine amidase AmiA) (N-acetylmuramoyl-l-alanine amidase I) | amiA A4T40_17440 APT94_12785 BE949_09710 BIQ85_13775 BK248_17165 BK334_04155 BK373_06330 BK383_23640 BMT97_19265 BUE82_06370 BXT93_01890 ECONIH1_14005 HMPREF3040_04896 MJ49_18690 MS6198_27580 SM09_02588 | A0A023L0H5 | 3 |
| N-acetylneuraminate lyase (NAL) (Neu5Ac lyase) (EC 4.1.3.3) (N-acetylneuraminate pyruvate-lyase) (N-acetylneuraminic acid aldolase) (Sialate lyase) (Sialic acid aldolase) (Sialic acid lyase) | nanA BY96_04275 | A0A027U3Z5 | 3 |
| N5-carboxyaminoimidazole ribonucleotide synthase (N5-CAIR synthase) (EC 6.3.4.18) (5-(carboxyamino)imidazole ribonucleotide synthetase) | purK A9R57_25690 BHS87_02825 BJJ90_19630 BW690_15560 ERS085365_04381 ERS085416_04151 ERS139211_04464 ERS150873_03918 PGD_02791 | A0A024L6J7 | 3 |
| NAD(P)-dependent oxidoreductase (Short-chain dehydrogenase) | AKG99_14870 BHF46_01090 BMT61_05540 BMT91_11820 JD73_18240 | A0A085P1L7 | 3 |
| NAD+ dependent aldehyde dehydrogenase ExaC | exaC PA1984 | Q9I2C4 | 3 |
| NAD-dependent succinate-semialdehyde dehydrogenase (Succinate-semialdehyde dehydrogenase) (EC 1.2.1.16) | gabD BE932_11225 SY51_14980 | A0A061YGG7 | 3 |
| NADH dehydrogenase-like protein YjlD (EC 1.6.99.-) (Glucose starvation-inducible protein 5) (GSI5) | yjlD BSU12290 | P80861 | 3 |
| NADH-quinone oxidoreductase (EC 1.6.5.11) | nuoG FTN_1674 | A0Q8G6 | 3 |
| NADH-quinone oxidoreductase (EC 1.6.5.11) | nuoG A4T50_04465 AML35_07635 APU18_03185 BE932_09015 BE963_27215 BHF46_01735 BK248_00865 BK373_07045 BK375_19570 BK383_00255 BMT49_14700 BMT94_02690 BMT97_08490 BUE82_07125 ERS085386_00209 JD73_19290 MJ49_19400 SM09_02402 SY51_13060 | A0A023LCA9 | 3 |
| NADH-quinone oxidoreductase subunit B (EC 1.6.5.11) (NADH dehydrogenase I subunit B) (NDH-1 subunit B) | nuoB PA2638 | Q9I0K0 | 3 |
| NADH-quinone oxidoreductase subunit C (EC 1.6.5.11) (NADH dehydrogenase I subunit C) (NDH-1 subunit C) | nuoC Smlt3403 | B2FNX7 | 3 |
| NADH-quinone oxidoreductase subunit D (EC 1.6.5.11) (NADH dehydrogenase I subunit D) (NDH-1 subunit D) | nuoD FTN_1677 | A0Q8G9 | 3 |
| NADH-quinone oxidoreductase subunit F (EC 1.6.5.11) | nuoF AC789_1c26350 | A0A0E1LC25 | 3 |
| NADP-dependent glyceraldehyde-3-phosphate dehydrogenase (EC 1.2.1.9) | gapN spr1028 | Q8DPS7 | 3 |
| NADP-dependent malic enzyme (NADP-ME) (EC 1.1.1.40) | maeB ypfF b2463 JW2447 | P76558 | 3 |
| Negative modulator of initiation of replication | seqA A4T50_18340 BE932_27080 SY51_03505 | A0A061KQD6 | 3 |
| Ni/Fe-hydrogenase large subunit (EC 1.12.5.1) | hydB Cj1266c | Q0P8Z0 | 3 |
| Ni/Fe-hydrogenase small chain (EC 1.12.5.1) | hydA Cj1267c | Q0P8Y9 | 3 |
| Nicotinate phosphoribosyltransferase (EC 6.3.4.21) | spr1277 | Q8DP97 | 3 |
| Nitrate reductase alpha chain (EC 1.7.99.4) | narG BSU37280 | P42175 | 3 |
| Nitrate reductase beta chain (EC 1.7.99.4) | narH BSU37270 | P42176 | 3 |
| Nitrogen regulation protein NR(I) | glnG BY96_18755 | A0A027TPV1 | 3 |
| Nitrogen regulatory protein P-II (Nitrogen regulatory protein P-II 1) (Transcriptional regulator) | glnB AC067_03135 AWP75_06510 BMT61_04910 EL75_1094 EL79_1105 EL80_1108 PGD_00683 | A0A024KZV8 | 3 |
| Non-specific ribonucleoside hydrolase RihC (EC 3.2.-.-) (Purine/pyrimidine ribonucleoside hydrolase) | rihC BE932_23165 SY51_00155 | A0A066SP86 | 3 |
| NrdJa | nrdJa PA5497 | Q9HT76 | 3 |
| Nucleoid-associated protein YejK | yejK BY96_25240 | A0A027U693 | 3 |
| Nucleoside diphosphate kinase (NDK) (NDP kinase) (EC 2.7.4.6) (Nucleoside-2-P kinase) | ndk EcE24377A_2802 | A7ZPW1 | 3 |
| Nucleoside-specific channel-forming protein tsx | tsx nupA b0411 JW0401 | P0A927 | 3 |