Research Article

Identification of Cross-Protective Potential Antigens against Pathogenic Brucella spp. through Combining Pan-Genome Analysis with Reverse Vaccinology

Table 1

High-potential protein list, with their adhesion score, cumulative results, and consensus annotation resulting from Blannotator, Pannzer, and eggNOG tools. The shown biological function is extracted from protein family databases as well as the indicated literature in the last column.

Protein ID (NCBI)Length (aa)Single-line annotation (NCBI)Adhesion scoreCumulative score of 5Annotation note (by Blannotator, Pannzer, and eggNOG)Domains (CD-search)No. of β sheet strandsBiological functionsReference

WP_004684144.1274Porin family protein0.594.56Porin opacity type (Pannzer), heat-resistant agglutinin 1 (eggNOG)LomR8Small solute transport, colonization, and adhesion[64, 90]
WP_002964666.1227OmpW family protein0.554.52OmpW family outer membrane protein (Pannzer, eggNOG), uncharacterized outer membrane protein y4mB (Blannotator)OmpW8Stress response, small solute transport, and bacterial colonization[64, 69, 91]
WP_002969562.1155Hypothetical protein0.544.5Not determinedNo domain hitsND
WP_002966849.1280DUF1849 domain-containing protein0.64.5ATP/GTP-binding site domain-containing protein A (Pannzer), DUF1849 domain-containing protein (eggNOG)DUF1849Uptake of organic nutrient
WP_002964611.1351DUF1176 domain-containing protein0.544.44DUF1176 domain-containing protein (eggNOG)DUF1176ND
WP_004690357.1284Porin family protein0.554.42Heat-resistant agglutinin 1 (Pannzer, eggNOG), uncharacterized protein BRA0921/BS1330_II0913 (Blannotator)LomR8Small solute transport, colonization, and adhesion[64, 90]
WP_004681227.1238Type IV secretion system protein VirB10.664.38Type IV secretion system protein VirB 1 (Pannzer, Blannotator), conjugal transfer protein (eggNOG)Lysozyme-like superfamilyAdaptation to intracellular environment[76, 92]
WP_002966226.1182Hypothetical protein0.544.38UPF0423 protein BAB2_0840 (Blannotator), pathogen-specific membrane antigen (Pannzer), periplasmic protein (eggNOG)Tpd
iron transport
Iron acquisition and virulence[93, 94]
WP_002963597.1121Hypothetical protein0.54.37Membrane-bound lysozyme inhibitor of C-type lysozyme (by Blannotator, Pannzer, and eggNOG)MliCImmune evasion and colonization/virulence factor[95]
WP_004688070.1192Hypothetical protein0.594.32Not determinedNo domain hitND
WP_002966502.1126Hypothetical protein0.624.32Outer membrane lipoprotein omp10 (by Blannotator, Pannzer, and eggNOG)No domain hitVirulence[65]
WP_002964322.1329Hypothetical protein0.594.2331 kDa transporter (Blannotator), alkanesulfonate transporter substrate-binding subunit (Pannzer), trap transporter solute receptor taxi family (eggNOG)TRAP_TAXINutrient transport, pathogenicity, and colonization[96]
WP_002971090.1267Hypothetical protein0.544.22Outer membrane beta-barrel domain protein (Pannzer)OM_channel superfamily10Adhesion[64, 97]
WP_004691650.1620TonB-dependent receptor0.534.21Iron compound TonB-dependent receptor (Pannzer), involved in the active translocation of vitamin B12 (cyanocobalamin) across the outer membrane to the periplasmic space. It derives its energy for transport by interacting with the transperiplasmic membrane protein TonB (by similarity) (eggNOG)BtuBIron acquisition and vitamin B12 transport[93, 94, 98]
WP_002971481.1168Outer membrane protein assembly factor BamE0.694.21Outer membrane protein assembly factor BamE (Pannzer), smpa omla domain-containing protein (eggNOG)BamECell envelope biogenesis and OMP assembly[99]
WP_004683739.1236Porin family protein0.564.21Autotransporter outer membrane beta-barrel domain-containing protein fragment (Pannzer), hemin-binding protein (eggNOG)LomR8Iron acquisition[64, 90]
WP_004691134.1403Hypothetical protein0.624.15Putative L,D-transpeptidase YafK (Blannotator), pollen allergen Poa pIX/Phl pVI (Pannzer), ErfK ybiS ycfS ynhG family protein (eggNOG)YafkEnvelope biogenesis and stress response[100]
WP_002965482.1439Sugar ABC transporter substrate-binding protein0.554.11ABC-type sugar transport system periplasmic component (Pannzer), extracellular solute-binding protein family 1 (eggNOG)PBP2_TMBP_likeUptake of organic nutrient and invasion/virulence[73]
WP_002964333.1220OmpA family protein0.564.09Probable lipoprotein YiaD (Blannotator), cell envelope biogenesis protein OmpA (Pannzer), OmpA motb domain protein (eggNOG)OmpACell envelope biogenesis, adhesion, invasion/intracellular survival, and evasion of host defense[67]
WP_023080793.1661Heme transporter BhuA0.514.05Heme transporter BhuA (Blannotator, Pannzer), receptor (eggNOG)CirA superfamilyIron acquisition, virulence, and association for bacterial persistence[93, 94, 101]
WP_002964719.1261Porin family protein0.574.0431 kDa outer membrane immunogenic protein (Omp31) (by Blannotator, Pannzer, and eggNOG)LomR8Hemin-binding proteins and virulence[64, 102, 103]
WP_002966352.1156DUF2271 domain-containing protein0.74.02Tat pathway signal protein (Pannzer), predicted periplasmic protein (DUF2271) (eggNOG)DUF2271ND
WP_004690579.1429Cell wall hydrolase0.514Cell wall hydrolase (Pannzer, eggNOG)CwlJCell envelope biogenesis[104]
WP_004683944.1212Porin family protein0.623.98Omp 25 (Pannzer), membrane (eggNOG)LomR8Virulence and adhesion[64, 97, 105]
WP_011068938.1792LPS-assembly protein LptD0.53.93LPS-assembly protein LptD (Pannzer), involved in the assembly of LPS in the outer leaflet of the outer membrane. Determines N-hexane tolerance and is involved in outer membrane permeability. Essential for envelope biogenesis (by similarity) (eggNOG)LptDCell envelope biogenesis[106]
WP_002967296.1166BA14K family protein0.63.92Immunoreactive BA14K (Pannzer, eggNOG)BA14KLectin-like activity and virulence[81, 82]
WP_002964622.1170BA14K family protein0.583.92Glutelin (Pannzer), BA14K (eggNOG)BA14KLectin-like activity and virulence[81, 82]
WP_004683466.1213Membrane protein0.553.925 kDa outer membrane immunogenic protein Omp 25 (Blannotator, Pannzer), membrane (eggNOG)LomR8Virulence and adhesion[64, 97, 105]
WP_002963776.1115DUF21470.63.89sn-Glycerol-3-phosphate ABC transporter ATP-binding protein (Pannzer), uncharacterized protein conserved in bacteria (DUF2147) (eggNOG)COG4731Nutrient transport and invasion/virulence[73]
WP_004681306.1367Iron ABC transporter substrate-binding protein0.513.88Periplasmic binding ABC transporter (Pannzer), solute-binding protein (eggNOG)AfuAIron acquisition and invasion/virulence[73]
WP_002964998.1177Hypothetical protein0.673.72Outer membrane lipoprotein omp19 (by Blannotator, Pannzer, and eggNOG)InhProtease inhibitor and alters the outer membrane properties[65, 107]
WP_002964530.1287Outer membrane protein assembly factor BamD0.523.69Outer membrane protein assembly factor BamD (Blannotator, Pannzer), part of the outer membrane protein assembly complex, which is involved in assembly and insertion of beta-barrel proteins into the outer membrane (eggNOG)BamDCell envelope biogenesis, OMP assembly, and required for bacterial viability[99]
WP_006278325.1261Hypothetical protein0.53.69Proline-rich region: proline-rich extensin (Pannzer)DNA_pol3_gamma3 superfamilyND
WP_002963780.1216Hypothetical protein0.73.58Not determinedNo domain hitND