| GTPase Der (GTP-binding protein EngA) | der HPSD74_0852 | U4SL40 | 1 |
| GTPase Der (GTP-binding protein EngA) | der engA pgdA SPy_0341 M5005_Spy0287 | P64064 | 1 |
| GTPase Der (GTP-binding protein EngA) | der OOM_0432 | I2AXR9 | 1 |
| GTPase Era | era PA0771 | Q9XCX8 | 1 |
| GTPase Era | era SPy_0476 M5005_Spy0390 | P0C0B9 | 1 |
| GTPase Era | era CD630_24370 | Q182C3 | 1 |
| GTPase Era | era SAOUHSC_01668 | Q2FY06 | 1 |
| GTPase Era | era KU39_1954 | A0A0K2L4R5 | 1 |
| GTPase HflX (GTP-binding protein HflX) | hflX SP70585_0731 | C1C634 | 1 |
| GTPase HflX (GTP-binding protein HflX) | hflX MXAN_5229 | Q1D1U2 | 1 |
| GTPase HflX (GTP-binding protein HflX) | hflX b4173 JW4131 | P25519 | 1 |
| GTPase HflX (GTP-binding protein HflX) | hflX SPy_0922 | Q9A058 | 1 |
| GTPase Obg (EC 3.6.5.-) (GTP-binding protein Obg) | obg spr0984 | Q8DPV8 | 1 |
| GTPase Obg (EC 3.6.5.-) (GTP-binding protein Obg) | obg PA4566 | Q9HVL8 | 1 |
| GTPase Obg (EC 3.6.5.-) (GTP-binding protein Obg) | obg SSON_3331 | Q3YX58 | 1 |
| GTPase Obg (EC 3.6.5.-) (GTP-binding protein Obg) | obg SPy_1333 M5005_Spy1088 | Q99Z94 | 1 |
| GTPase Obg (EC 3.6.5.-) (GTP-binding protein Obg) | obg SAOUHSC_01753 | Q2FXT1 | 1 |
| GTPase ObgE/CgtA (EC 3.6.5.-) (GTP-binding protein Obg) | obgE cgtA obg yhbZ b3183 JW3150 | P42641 | 1 |
| Guanine deaminase | VSAK1_25075 | A6CZ71 | 1 |
| Guanine deaminase | VSAK1_15422 | A6D715 | 1 |
| Guanine nucleotide exchange factor | sopE2 SCH_1852 | Q57NF3 | 1 |
| Guanine nucleotide exchange factor sopE2 (Effector protein sopE2) (Toxin sopE2) | sopE2 STM1855 | Q7CQD4 | 1 |
| Guanine/hypoxanthine permease GhxP | ghxP yjcD b4064 JW4025 | P0AF52 | 1 |
| Guanosine-3',5'-bis(Diphosphate) 3'-pyrophosphohydrolase | spoT PA5338 | Q9HTM0 | 1 |
| Guanosine-5'-triphosphate,3'-diphosphate pyrophosphatase (EC 3.6.1.40) (Guanosine pentaphosphate phosphohydrolase) (pppGpp-5'-phosphohydrolase) | gppA VSAK1_24204 | A6D6I9 | 1 |
| Guanylate kinase (EC 2.7.4.8) (GMP kinase) | gmk SPy_1632 M5005_Spy1341 | Q99YM5 | 1 |
| HAD hydrolase, IA, variant 1 family protein | KW89_2189 | A0A0K2DZ70 | 1 |
| HAD-superfamily hydrolase, subfamily IA, variant 3 | Acid_0991 | Q02AD3 | 1 |
| Haemin storage system, HmsF protein (HmsF protein) | hmsF YPO1952 | Q9R7V4 | 1 |
| Haemin uptake system outer membrane receptor | chuA Cj1614 | Q0P814 | 1 |
| HAMP domain-containing protein | B195_03048 | M5QMM9 | 1 |
| Head-tail adaptor | PP_1570 | Q88MK1 | 1 |
| Heat shock protein | FTT_1794 | Q5NE64 | 1 |
| Heat shock protein 15 (HSP15) | hslR yrfH b3400 JW3363 | P0ACG8 | 1 |
| Heat shock protein DnaJ domain-containing protein | NSU_1085 | G6E9R4 | 1 |
| Heat shock protein HtpX (EC 3.4.24.-) | htpX FTT_0862c | Q5NGH8 | 1 |
| Heat shock protein HtpX (EC 3.4.24.84) | OOM_0376 | I2AXM0 | 1 |
| Heat shock protein, HSP20 family | FTN_1769 | A0Q8Q4 | 1 |
| Heat-inducible transcription repressor HrcA | hrcA spr0453 | Q8DQW9 | 1 |
| Heat-inducible transcription repressor HrcA | hrcA SPy_1763 M5005_Spy1500 | Q99YC7 | 1 |
| Heavy metal cation transport ATPase | FTN_0394 | A0Q4Y2 | 1 |
| Heavy metal cation transport ATPase (EC 3.6.3.3) | OOM_0380 | I2AXM4 | 1 |
| Helicase/SNF2 domain protein | MXAN_4680 | Q1D3C7 | 1 |
| Hemagglutinin protein HagA | hagA PGN_1733 | B2RLK7 | 1 |
| Hemagglutinin, putative | PG_0411 | F5HGU5 | 1 |
| Hemagglutinin-like protein | AB237_2463 | A0A0E1PTY9 | 1 |
| Hemagglutinin/hemolysin-related protein | NMB0497 | Q9K0S7 | 1 |
| Hemagglutinin/hemolysin-related protein | NMB0493 | Q9K0T0 | 1 |
| Hemagglutinin/hemolysin-related protein | NMB1768 | Q9JY30 | 1 |
| Heme exporter protein D (Cytochrome c-type biogenesis protein CcmD) | ccmD PA1478 | Q9I3N4 | 1 |
| Heme oxygenase (EC 1.14.99.3) | CPC_0232 | B1BH57 | 1 |
| Heme receptor | VS_II0751 | B7VS02 | 1 |
| Heme transport protein HutA | VC_A0576 | Q9KM13 | 1 |
| Heme utilization protein | NMBB_1917 | E3D1T5 | 1 |
| Heme-binding protein FetB | PGN_0705 | B2RIM9 | 1 |
| Heme-transporting ATPase (EC 3.6.3.41) | ccmA MXAN_3258 | Q1D7B6 | 1 |
| Heme/hemin ABC transporter, periplasmic heme/hemin-binding protein | PP_4689 | Q88DX9 | 1 |
| Heme/hemopexin-binding protein | hxuA HPSD74_2080 | U4S8Y8 | 1 |
| Heme/hemopexin-binding protein A | hxuA NTHI0371 | Q4QNS4 | 1 |
| Hemoglobin receptor | hmbR NMB1668 | Q9JYA8 | 1 |
| Hemolysin | ethA | O32608 | 1 |
| Hemolysin | hlyA VC_A0219 | P09545 | 1 |
| Hemolysin | EHEC-hlyA | Q47262 | 1 |
| Hemolysin activation/secretion protein-like protein | NSU_1235 | G6EA64 | 1 |
| Hemolysin secretion/activation ShlB/FhaC/HecB family protein | HPSD74_0813 | U4SL09 | 1 |
| Hemolysin secretion/activation ShlB/FhaC/HecB family protein | HPSD74_0887 | U4SHP6 | 1 |
| Hemolysin, putative | VC_0578 | Q9KUE3 | 1 |
| Hemolysin-related protein | VC_0930 | Q9KTH2 | 1 |
| Hemolysin-related protein | VC_1888 | Q9KQW0 | 1 |
| HemX protein | SC1083_2170 | G4ABD5 | 1 |
| HemY | hemY SCH_3836 | Q57HS0 | 1 |
| HemY family protein | HPSD74_1107 | U4SI75 | 1 |
| HemY protein | SC1083_2171 | G4ABD6 | 1 |
| Heparin-binding hemagglutinin (Adhesin) | hbhA Rv0475 MTCY20G9.01 | P9WIP9 | 1 |
| Heptaprenyl diphosphate syntase component II, putative (EC 2.5.1.30) | SAOUHSC_01486 | Q2FYG6 | 1 |
| Heptosyltransferase II | waaF PA5012 | G3XD35 | 1 |
| Hexulose-6-phosphate synthase (HumpS) (EC 4.1.2.-) | sgh spr1846 | Q8DN97 | 1 |
| HflC protein | SC1083_0588 | G4A6Z8 | 1 |
| HflK protein | SC1083_0409 | G4A6G9 | 1 |
| HflK-HflC membrane protein complex, HflK | hflK FTN_1048 | A0Q6S0 | 1 |
| HflK-HflC membrane protein complex, HflK | OOM_1329 | I2AZZ4 | 1 |
| High frequency lysogenization protein HflD | hflD ycfC b1132 JW5165 | P25746 | 1 |
| High frequency lysogenization protein HflD homolog | hflD PA2627 | Q9I0L1 | 1 |
| High-affinity branched-chain amino acid transport ATP-binding protein | B195_10961 | M5QGN1 | 1 |
| High-affinity branched-chain amino acid transport ATP-binding protein BraF | braF PP_4864 | Q88DG1 | 1 |
| High-affinity branched-chain amino acid transport ATP-binding protein BraF | braF PA1071 | P21629 | 1 |
| High-affinity branched-chain amino acid transport ATP-binding protein BraG | braG PA1070 | P21630 | 1 |
| High-affinity branched-chain amino acid transport system permease protein LivM (LIV-I protein M) | livM b3456 JW3421 | P22729 | 1 |
| High-affinity gluconate transporter (Gluconate permease) (Gnt-I system) | gntT gntM usgA yhgC b3415 JW5690 | P39835 | 1 |
| High-affinity zinc uptake system protein ZnuA | znuA yebL yzzP b1857 JW5831 | P39172 | 1 |
| High-affinity zinc uptake system protein znuA | znuA HPSD74_1084 | U4SJ19 | 1 |
| Highly acidic protein | Cj1178c | Q0P978 | 1 |
| Hippurate hydrolase | NSU_0174 | G6E753 | 1 |
| Histidine ammonia-lyase (Histidase) (EC 4.3.1.3) | hutH B195_02453 | M5QNX5 | 1 |
| Histidine ammonia-lyase (Histidase) (EC 4.3.1.3) | hutH KPR_3791 | R4YI45 | 1 |
| Histidine ammonia-lyase (Histidase) (EC 4.3.1.3) | hutH VSAK1_17072 | A6CUX5 | 1 |
| Histidine biosynthesis bifunctional protein HisB [Includes: Histidinol-phosphatase (EC 3.1.3.15); Imidazoleglycerol-phosphate dehydratase (IGPD) (EC 4.2.1.19)] | hisB HPSD74_1336 | U4SFS5 | 1 |
| Histidine biosynthesis bifunctional protein HisB [Includes: Histidinol-phosphatase (EC 3.1.3.15); Imidazoleglycerol-phosphate dehydratase (IGPD) (EC 4.2.1.19)] | hisB VSAK1_00200 | A6D5K3 | 1 |
| Histidine kinase | VSAK1_06035 | A6CZJ7 | 1 |
| Histidine kinase (EC 2.7.13.3) | MXAN_4445 | Q1D407 | 1 |