Target candidate with partial support; inspect missing evidence before prioritizing.
Automated synthesis of the evidence currently loaded. Review the underlying records before prioritizing this protein.
Main supporting evidence
Risks to review
Evidence coverage
Terms and data sources used on this page
PDB: experimentally determined structures from the Protein Data Bank. These are the strongest structural evidence, but may cover only part of the protein.
AlphaFold DB model: a precomputed predicted structure downloaded from AlphaFold Database/UniProt, not an experiment performed here.
ColabFold model: a predicted structure generated for this workspace; interpret it with coverage and confidence.
pLDDT: confidence score for predicted structures. High values support local geometry; low values mean the region should not drive pocket interpretation.
FPocket / P2Rank: software tools that predict possible ligand-binding pockets on a 3D structure. They are useful screening signals, not experimental validation.
Druggability: a pocket-based estimate of whether a small molecule could bind productively. It does not mean a drug already exists.
PDB ligand: a compound observed in an experimental structure. Direct same-protein records are stronger than homolog-transferred records.
ChEMBL: a public database of measured compound bioactivity. Direct entries are stronger than entries transferred from similar proteins.
ZINC: a purchasable-compound database. Here it marks proposed candidates from chemical similarity, not measured binders.
LigQ / LigQ_2: an internal Target pipeline step that gathers PDB, ChEMBL, and ZINC ligand evidence for each protein.
Off-target: sequence similarity to proteins we prefer not to hit, such as human proteins or beneficial gut microbiome proteins.
DEG: Database of Essential Genes. A match suggests the protein resembles genes known to be essential in other organisms.
Roary / CoreCruncher: pan-genome tools used to decide whether a gene is core across analyzed strains or accessory/strain-specific.
EC / GO: functional annotations: EC describes enzyme reactions; GO describes biological process, molecular function, or cellular component.
KEGG pathway: a curated metabolic route label used here to group reactions imported from the metabolic model.
Chokepoint: a metabolic reaction that is the only producer or consumer of a metabolite in the imported model.
Prioritization evidence
Selectivity, essentiality, structural confidence, conservation, and predicted binding-site evidence.
Off-target risk
- Human off-target
- No hit
- Gut microbiome similarity
- 1.7% of screened genomes Lower prevalence suggests narrower overlap with the screened gut microbiome.
Essentiality
- Essential (DEG)
- Y
- DEG identity (%)
- 84.615 Higher values support similarity to known essential genes.
- DEG E-value
- 0.0 Smaller values mean stronger essential-gene similarity.
Structure confidence
- ColabFold pLDDT
- 91.37 0-100 confidence; >70 supports local structural interpretation.
Binding-site evidence
AlphaFold DB / UniProt modelP2Rank's binding-site probability is the primary druggability signal shown across the app; FPocket's druggability score is shown alongside it for comparison. Both estimate small-molecule pocket quality after applying the curated structure priority — neither is experimental binding evidence. The 3D viewer may show a different loaded structure, so visible pockets can differ.
Sequence
Primary amino-acid sequence viewer.
MNFFSFCRRGALTGMLLLLGITSAQAADWPRQVTDSYGTHTLPSQPLRIVSTSVTLTGSLLAIDAPVVASGATTPNNRVADSQGFLRQWSEVAKARKLARLYIGEPSAEAVAAQMPDLILVSATGGDSALPLYDQLKTIAPTLVINYDDKSWQTLLTQLGQITGHEQQASARIADFNKQLVSLKEKMKLPPQPVTALVYTAAAHSANIWTPESAQGQMLEQLGFSLATLPGGLPASHSQGKRHDIVQLGGENLAAGLNGQSLFLFAGDQKDADAIYANPLLAHLPAVAGKRVYPLGTETFRLDYYSALLVLQRLSSLFG
Functional annotations
Enzyme classification and Gene Ontology terms linked to this protein.
Subcellular localization
- Localization
- Periplasmic
Gene Ontology (GO)
2- GO:0030288 The region between the inner (cytoplasmic or plasma) membrane and outer membrane of organisms with two membranes such as Gram negative bacteria. These periplasmic spaces are relatively thick and contain a thin peptidoglycan layer (PGL), also referred to as a thin cell wall.
- GO:1901678 The directed movement of an iron coordination entity into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore.
Sequence domains and features
Domain and signature matches imported from InterPro and related databases.
Show feature table
| Start | End | DB | Term | Name |
|---|---|---|---|---|
| 1 | 26 | SignalP_EUK | SignalP-noTM | SignalP-noTM |
| 146 | 318 | FunFam | G3DSA:3.40.50.1980:FF:000014 | Ferrienterobactin-binding periplasmic protein FepB |
| 27 | 319 | Phobius | NON_CYTOPLASMIC_DOMAIN | Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region. |
| 1 | 26 | SignalP_GRAM_POSITIVE | SignalP-TM | SignalP-TM |
| 166 | 186 | Coils | Coil | Coil |
| 27 | 145 | FunFam | G3DSA:3.40.50.1980:FF:000009 | Iron-enterobactin transporter periplasmic binding protein |
| 27 | 145 | Gene3D | G3DSA:3.40.50.1980 | Nitrogenase molybdenum iron protein domain |
| 1 | 9 | Phobius | SIGNAL_PEPTIDE_N_REGION | N-terminal region of a signal peptide. |
| 48 | 319 | ProSiteProfiles | PS50983 | Iron siderophore/cobalamin periplasmic-binding domain profile. |
| 48 | 319 | InterPro | IPR002491 | ABC transporter periplasmic binding domain |
| 44 | 313 | CDD | cd01146 | FhuD |
| 22 | 26 | Phobius | SIGNAL_PEPTIDE_C_REGION | C-terminal region of a signal peptide. |
| 49 | 296 | Pfam | PF01497 | Periplasmic binding protein |
| 49 | 296 | InterPro | IPR002491 | ABC transporter periplasmic binding domain |
| 31 | 315 | SUPERFAMILY | SSF53807 | Helical backbone metal receptor |
| 1 | 26 | Phobius | SIGNAL_PEPTIDE | Signal peptide region |
| 10 | 21 | Phobius | SIGNAL_PEPTIDE_H_REGION | Hydrophobic region of a signal peptide. |
| 17 | 314 | PANTHER | PTHR30532 | IRON III DICITRATE-BINDING PERIPLASMIC PROTEIN |
| 146 | 319 | Gene3D | G3DSA:3.40.50.1980 | Nitrogenase molybdenum iron protein domain |
3D structure
Selected loaded structure. Experimental PDB entries may cover only a portion of the sequence; AlphaFold DB and ColabFold models typically cover the full protein but remain computational predictions.
How colors and pocket overlays are used
Pocket details Inspect a specific pocket, or open the full viewer
- Method
- -
- Score
- -
- Visible layer
- -
- Residues
- -
- Pocket properties
- -
Selecting a pocket opens its details and centers the viewer without clearing other active layers. Use Focus this pocket when you want to hide the rest; use Surface for the wider residue environment.
Binding pockets · P2Rank
Druggability (P2Rank): high ≥ 0.5 · medium 0.2–0.49 · low < 0.2
Binding pockets · FPocket
Druggability (FPocket): high ≥ 0.7 · medium 0.4–0.69 · low < 0.4
Binding pockets · P2Rank
Druggability (P2Rank): high ≥ 0.5 · medium 0.2–0.49 · low < 0.2
Binding pockets · FPocket
Druggability (FPocket): high ≥ 0.7 · medium 0.4–0.69 · low < 0.4
All structural evidence
Structural evidence
0 + 2Experimental PDB entries plus predicted AlphaFold DB or ColabFold models. Click Switch to display a different loaded structure in the viewer.
| Entry | Method | Resolution | Chain | Coverage | Links | Status |
|---|---|---|---|---|---|---|
|
AlphaFold DB
AF_A0A0H3GL81
|
AlphaFold DB | — | — | full sequence | — | Viewing |
|
ColabFold
VK055_1926
|
ColabFold | — | — | full sequence | — | Loaded |
Ligand evidence
Ligands grouped by evidence source. PDB ligands keep the source crystal visible, and loaded crystals can be opened directly in the structure viewer.
Structural ligand evidence is available for this target.
Highest-confidence structural evidence: ligands co-crystallized with this exact protein. If the source PDB is loaded in Target, use Open crystal to inspect it in the structure viewer.
No PDB structure with a co-crystallized ligand found for this exact protein.
Structural evidence inferred from similar proteins. The source crystal indicates where the ligand was observed; the UniProt column identifies the homologous protein carrying that ligand.
| Ligand | Source crystal | UniProt (homolog) | MW · LogP · TPSA | Lipinski | PAINS | SMILES |
|---|---|---|---|---|---|---|
| 5LC RCSB PDB | Q0P8Q4 | 374.4 Da LogP 1.84 TPSA 139.1 | 1 viol. | Alert |
c1cc(c(c(c1)O)O)C(=O)NCCCCCNC(=O)c2cccc(c2O)O
|
|
| 7PG RCSB PDB | A0A2P5JFB2 | 384.5 Da LogP -0.26 TPSA 94.1 | ✓ Ro5 | ✓ Clean |
COCCOCCOCCOCCOCCOCCOCCOCCO
|
|
| 8LC RCSB PDB | Q0P8Q4 | 416.5 Da LogP 3.01 TPSA 139.1 | 1 viol. | Alert |
c1cc(c(c(c1)O)O)C(=O)NCCCCCCCCNC(=O)c2cccc(c2O)O
|
|
| 95B RCSB PDB | Q0P8Q4 | 418.4 Da LogP 1.29 TPSA 176.4 | 1 viol. | Alert |
c1cc(c(c(c1)O)O)C(=O)NCCCC[C@@H](C(=O)O)NC(=O)c…
|
|
| 9RT RCSB PDB | Q0P8Q4 | 277.3 Da LogP 1.02 TPSA 85.1 | ✓ Ro5 | ✓ Clean |
c1ccnc(c1)CNS(=O)(=O)c2ccc(cc2)CN
|
|
| DBS RCSB PDB | Q0P8Q4 | 241.2 Da LogP -0.73 TPSA 127.1 | ✓ Ro5 | Alert |
c1cc(c(c(c1)O)O)C(=O)N[C@@H](CO)C(=O)O
|
|
| EB4 RCSB PDB | P0AEL6 | 669.6 Da LogP -0.74 TPSA 287.6 | 3 viol. | Alert |
c1cc(c(c(c1)O)O)C(=O)N[C@H]2COC(=O)[C@H](COC(=O…
|
|
| EHS RCSB PDB | Q0P8Q4 | 464.4 Da LogP -0.97 TPSA 222.9 | 1 viol. | Alert |
c1cc(c(c(c1)O)O)C(=O)N[C@@H](CO)C(=O)OC[C@@H](C…
|
|
| LCM RCSB PDB | Q0P8Q4 | 360.4 Da LogP 1.45 TPSA 139.1 | 1 viol. | Alert |
c1cc(c(c(c1)O)O)C(=O)NCCCCNC(=O)c2cccc(c2O)O
|
|
| PXJ RCSB PDB | Q0P8Q4 | 388.4 Da LogP 2.23 TPSA 139.1 | 1 viol. | Alert |
c1cc(c(c(c1)O)O)C(=O)NCCCCCCNC(=O)c2cccc(c2O)O
|
|
| VBN RCSB PDB | Q9RCF6 | 705.7 Da LogP 1.84 TPSA 243.1 | 3 viol. | Alert |
C[C@@H]1[C@H](N=C(O1)c2cccc(c2O)O)C(=O)NCCCN(CC…
|
Experimental bioactivity from ChEMBL measured directly on this protein. Score = pchembl (−log Ki/IC₅₀; higher = more potent).
No ChEMBL bioactivity data found for this exact protein.
Bioactivity inferred from similar proteins in ChEMBL. Score = pchembl (−log Ki/IC₅₀; higher = more potent).
No ChEMBL hits found through similar proteins.
Proposed virtual-screening candidates from ZINC. Score = Tanimoto similarity to a known binder (0–1; higher = more similar).
| Ligand | Tanimoto | MW · LogP · TPSA | Lipinski | PAINS | SMILES |
|---|---|---|---|---|---|
| ZINC142623932 ZINC | 1.000 | 464.4 Da LogP -0.97 TPSA 222.9 | 1 viol. | Alert |
O=C(N[C@@H](COC(=O)[C@H](CO)NC(=O)c1cccc(O)c1O)…
|
| ZINC1580161 ZINC | 1.000 | 208.3 Da LogP -0.33 TPSA 57.2 | ✓ Ro5 | ✓ Clean |
COCCOCCOCCOCCO
|
| ZINC16052118 ZINC | 1.000 | 340.4 Da LogP -0.28 TPSA 84.8 | ✓ Ro5 | ✓ Clean |
COCCOCCOCCOCCOCCOCCOCCO
|
| ZINC16052257 ZINC | 1.000 | 384.5 Da LogP -0.26 TPSA 94.1 | ✓ Ro5 | ✓ Clean |
COCCOCCOCCOCCOCCOCCOCCOCCO
|
| ZINC34317654 ZINC | 1.000 | 472.6 Da LogP -0.23 TPSA 112.5 | 1 viol. | ✓ Clean |
COCCOCCOCCOCCOCCOCCOCCOCCOCCOCCO
|
| ZINC44076059 ZINC | 1.000 | 428.5 Da LogP -0.24 TPSA 103.3 | ✓ Ro5 | ✓ Clean |
COCCOCCOCCOCCOCCOCCOCCOCCOCCO
|
| ZINC5210101 ZINC | 1.000 | 252.3 Da LogP -0.31 TPSA 66.4 | ✓ Ro5 | ✓ Clean |
COCCOCCOCCOCCOCCO
|
| ZINC5997860 ZINC | 1.000 | 296.4 Da LogP -0.29 TPSA 75.6 | ✓ Ro5 | ✓ Clean |
COCCOCCOCCOCCOCCOCCO
|
| ZINC901977 ZINC | 1.000 | 241.2 Da LogP -0.73 TPSA 127.1 | ✓ Ro5 | Alert |
O=C(N[C@@H](CO)C(=O)O)c1cccc(O)c1O
|
| ZINC14696227 ZINC | 0.788 | 225.2 Da LogP -0.43 TPSA 106.9 | ✓ Ro5 | ✓ Clean |
O=C(N[C@H](CO)C(=O)O)c1ccccc1O
|
| ZINC313581 ZINC | 0.769 | 276.4 Da LogP 2.12 TPSA 59.1 | ✓ Ro5 | ✓ Clean |
CCc1ccc(S(=O)(=O)NCc2ccccn2)cc1
|
| ZINC233866 ZINC | 0.763 | 263.3 Da LogP 1.14 TPSA 85.1 | ✓ Ro5 | ✓ Clean |
Nc1ccc(S(=O)(=O)NCc2ccccn2)cc1
|
| ZINC29395 ZINC | 0.750 | 248.3 Da LogP 1.56 TPSA 59.1 | ✓ Ro5 | ✓ Clean |
O=S(=O)(NCc1ccccn1)c1ccccc1
|
| ZINC6699097 ZINC | 0.732 | 290.4 Da LogP 2.51 TPSA 59.1 | ✓ Ro5 | ✓ Clean |
CCCc1ccc(S(=O)(=O)NCc2ccccn2)cc1
|
| ZINC575419714 ZINC | 0.727 | 312.4 Da LogP 0.42 TPSA 66.4 | ✓ Ro5 | ✓ Clean |
COCCOCCOCCSCCOCCOCCO
|
| ZINC1158311 ZINC | 0.718 | 374.2 Da LogP 2.16 TPSA 59.1 | ✓ Ro5 | ✓ Clean |
O=S(=O)(NCc1ccccn1)c1ccc(I)cc1
|
| ZINC145313 ZINC | 0.718 | 262.3 Da LogP 1.87 TPSA 59.1 | ✓ Ro5 | ✓ Clean |
Cc1ccc(S(=O)(=O)NCc2ccccn2)cc1
|
| ZINC288606 ZINC | 0.718 | 327.2 Da LogP 2.32 TPSA 59.1 | ✓ Ro5 | ✓ Clean |
O=S(=O)(NCc1ccccn1)c1ccc(Br)cc1
|
| ZINC37689 ZINC | 0.718 | 266.3 Da LogP 1.70 TPSA 59.1 | ✓ Ro5 | ✓ Clean |
O=S(=O)(NCc1ccccn1)c1ccc(F)cc1
|
| ZINC577388 ZINC | 0.718 | 282.8 Da LogP 2.21 TPSA 59.1 | ✓ Ro5 | ✓ Clean |
O=S(=O)(NCc1ccccn1)c1ccc(Cl)cc1
|
| ZINC35466170 ZINC | 0.707 | 255.2 Da LogP -0.64 TPSA 116.1 | ✓ Ro5 | Alert |
COC(=O)[C@@H](CO)NC(=O)c1cccc(O)c1O
|
| ZINC35466172 ZINC | 0.707 | 255.2 Da LogP -0.64 TPSA 116.1 | ✓ Ro5 | Alert |
COC(=O)[C@H](CO)NC(=O)c1cccc(O)c1O
|
| ZINC115163232 ZINC | 0.700 | 222.3 Da LogP 0.07 TPSA 57.2 | ✓ Ro5 | ✓ Clean |
COCCOCCOCCOCCCO
|
| ZINC258837490 ZINC | 0.700 | 354.4 Da LogP 0.11 TPSA 84.8 | ✓ Ro5 | ✓ Clean |
COCCOCCOCCOCCOCCOCCOCCCO
|
| ZINC6091714 ZINC | 0.698 | 369.4 Da LogP -1.11 TPSA 182.2 | 1 viol. | Alert |
NCCCC[C@@H](NC(=O)c1cccc(O)c1O)C(=O)N[C@@H](CO)…
|
| ZINC9379229 ZINC | 0.690 | 291.3 Da LogP 0.66 TPSA 102.2 | ✓ Ro5 | ✓ Clean |
NC(=O)c1ccc(S(=O)(=O)NCc2ccccn2)cc1
|
| ZINC199515761 ZINC | 0.689 | 446.4 Da LogP 0.18 TPSA 202.7 | 1 viol. | Alert |
C=C(NC(=O)c1cccc(O)c1O)C(=O)OC[C@H](NC(=O)c1ccc…
|
| ZINC12501520 ZINC | 0.688 | 458.5 Da LogP -0.88 TPSA 123.5 | 1 viol. | ✓ Clean |
OCCOCCOCCOCCOCCOCCOCCOCCOCCOCCO
|
| ZINC1692489 ZINC | 0.688 | 222.3 Da LogP 0.33 TPSA 46.2 | ✓ Ro5 | ✓ Clean |
COCCOCCOCCOCCOC
|
| ZINC3874716 ZINC | 0.688 | 414.5 Da LogP -0.90 TPSA 114.3 | ✓ Ro5 | ✓ Clean |
OCCOCCOCCOCCOCCOCCOCCOCCOCCO
|
| ZINC4283769 ZINC | 0.688 | 238.3 Da LogP -0.96 TPSA 77.4 | ✓ Ro5 | ✓ Clean |
OCCOCCOCCOCCOCCO
|
| ZINC4521548 ZINC | 0.688 | 282.3 Da LogP -0.95 TPSA 86.6 | ✓ Ro5 | ✓ Clean |
OCCOCCOCCOCCOCCOCCO
|
| ZINC4530388 ZINC | 0.688 | 266.3 Da LogP 0.35 TPSA 55.4 | ✓ Ro5 | ✓ Clean |
COCCOCCOCCOCCOCCOC
|
| ZINC5178829 ZINC | 0.688 | 326.4 Da LogP -0.93 TPSA 95.8 | ✓ Ro5 | ✓ Clean |
OCCOCCOCCOCCOCCOCCOCCO
|
| ZINC5178830 ZINC | 0.688 | 370.4 Da LogP -0.91 TPSA 105.1 | ✓ Ro5 | ✓ Clean |
OCCOCCOCCOCCOCCOCCOCCOCCO
|
| ZINC5701172 ZINC | 0.688 | 310.4 Da LogP 0.36 TPSA 64.6 | ✓ Ro5 | ✓ Clean |
COCCOCCOCCOCCOCCOCCOC
|
| ZINC5997861 ZINC | 0.688 | 398.5 Da LogP 0.40 TPSA 83.1 | ✓ Ro5 | ✓ Clean |
COCCOCCOCCOCCOCCOCCOCCOCCOC
|
| ZINC384532 ZINC | 0.683 | 304.4 Da LogP 2.86 TPSA 59.1 | ✓ Ro5 | ✓ Clean |
CC(C)(C)c1ccc(S(=O)(=O)NCc2ccccn2)cc1
|
| ZINC465808 ZINC | 0.683 | 338.4 Da LogP 3.54 TPSA 59.1 | ✓ Ro5 | ✓ Clean |
Cc1ccc(-c2ccc(S(=O)(=O)NCc3ccccn3)cc2)cc1
|
| ZINC1079538 ZINC | 0.667 | 294.4 Da LogP 2.28 TPSA 59.1 | ✓ Ro5 | ✓ Clean |
CSc1ccc(S(=O)(=O)NCc2ccccn2)cc1
|
| ZINC272459 ZINC | 0.667 | 293.3 Da LogP 1.47 TPSA 102.2 | ✓ Ro5 | ✓ Clean |
O=[N+]([O-])c1ccc(S(=O)(=O)NCc2ccccn2)cc1
|
| ZINC29436 ZINC | 0.667 | 278.3 Da LogP 1.57 TPSA 68.3 | ✓ Ro5 | ✓ Clean |
COc1ccc(S(=O)(=O)NCc2ccccn2)cc1
|
| ZINC387197 ZINC | 0.667 | 340.4 Da LogP 3.35 TPSA 68.3 | ✓ Ro5 | ✓ Clean |
O=S(=O)(NCc1ccccn1)c1ccc(Oc2ccccc2)cc1
|
| ZINC5520882 ZINC | 0.667 | 292.3 Da LogP 1.26 TPSA 96.4 | ✓ Ro5 | ✓ Clean |
O=C(O)c1ccc(S(=O)(=O)NCc2ccccn2)cc1
|
| ZINC575432150 ZINC | 0.667 | 344.4 Da LogP -0.89 TPSA 100.5 | ✓ Ro5 | ✓ Clean |
COCCOCCOCCS(=O)(=O)CCOCCOCCO
|
| ZINC7059593 ZINC | 0.667 | 273.3 Da LogP 1.43 TPSA 82.8 | ✓ Ro5 | ✓ Clean |
N#Cc1ccc(S(=O)(=O)NCc2ccccn2)cc1
|
| ZINC7059614 ZINC | 0.667 | 316.3 Da LogP 2.58 TPSA 59.1 | ✓ Ro5 | ✓ Clean |
O=S(=O)(NCc1ccccn1)c1ccc(C(F)(F)F)cc1
|
| ZINC937452 ZINC | 0.667 | 358.9 Da LogP 3.88 TPSA 59.1 | ✓ Ro5 | ✓ Clean |
O=S(=O)(NCc1ccccn1)c1ccc(-c2ccc(Cl)cc2)cc1
|
| ZINC1857524240 ZINC | 0.652 | 207.3 Da LogP -0.75 TPSA 60.0 | ✓ Ro5 | ✓ Clean |
COCCNCCOCCOCCO
|
| ZINC13947769 ZINC | 0.651 | 304.4 Da LogP 3.07 TPSA 59.1 | ✓ Ro5 | ✓ Clean |
CC[C@@H](C)c1ccc(S(=O)(=O)NCc2ccccn2)cc1
|
PDB and ChEMBL records on this protein are shown in full. ChEMBL records from similar proteins are capped at the top 100 per protein (by pchembl) and ZINC at the top 50 (Tanimoto ≥ 0.5). ADME columns are descriptor-based screening flags, not experimental toxicity results.
Cross-references
External database identifiers for this protein, its structures, ligands, and metabolic reactions.