KpKP13 Protein target profile

Fe(3+)-citrate import system permease protein

Accession: KP13_05335

Gene: AHE44148.1 3D evidence: AlphaFold DB model + ColabFold model UniProt A0A0H3GR28
Length 337
Pocket druggability (P2Rank · AlphaFold DB model) 0.182
Direct ligand evidence 0 52 total records
Functional annotation 0 EC 4 GO
Target summary

Promising target candidate with multiple supporting evidence streams.

Automated synthesis of the evidence currently loaded. Review the underlying records before prioritizing this protein.

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
0.7% of screened genomes Lower prevalence suggests narrower overlap with the screened gut microbiome.

Essentiality

Essential (DEG)
Y
DEG identity (%)
41.901 Higher values support similarity to known essential genes.
DEG E-value
1.3899999999999998e-42 Smaller values mean stronger essential-gene similarity.

Structure confidence

ColabFold pLDDT
91.25 0-100 confidence; >70 supports local structural interpretation.

Binding-site evidence

AlphaFold DB / UniProt model

P2Rank'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.

Druggability (P2Rank) 0.182
Structure A0A0H3GR28
Pocket Pocket 1
Druggability (FPocket) 0.724
Structure A0A0H3GR28
Pocket Pocket 8
ColabFold model
P2Rank 0.25 · Pocket 1
FPocket 0.64 · Pocket 2
Core conservation Accessory gene
Roary core
CoreCruncher accessory
Gut microbiome 34 / 4744 genomes with a hit
Prevalence 0.7%

Sequence

Primary amino-acid sequence viewer.

MSVAILLSARRRPRPRLALLLLTLLLIAASLVHLGLGARWIAPQTVLRALLEYDPRNFEQRIIIDLRLVRLAAALLTGAALGVAGLLLQTVIRNPLGEPHILGLNAGASLAVVATSALGLSLGAFPVGRPLTAACGAGLLFGGVMALASAGRGGATPLRITLCGVALSGFASAVTAAILILDEQTLLAMRTWLAGDLAGLNWSTLQTALIGLGVALLIAPRLNVLALGDKVALGLGVNLVQTRLLGLLAIALLCGAAVAVAGPIGFVGLVVPHVVRRLVTEDIRLALPLAAPVGALALVLADIAARTLVAPQELATGAMTALVGAPLFIFIAARFFK

Functional annotations

Enzyme classification and Gene Ontology terms linked to this protein.

4 GO

Subcellular localization

Localization
CytoplasmicMembrane

Gene Ontology (GO)

4
  • GO:0016020 A lipid bilayer along with all the proteins and protein complexes embedded in it and attached to it.
  • GO:0022857 Enables the transfer of a substance, usually a specific substance or a group of related substances, from one side of a membrane to the other.
  • GO:0005886 The membrane surrounding a cell that separates the cell from its external environment. It consists of a phospholipid bilayer and associated proteins.
  • GO:0033214 A process in which iron (Fe3+) is solubilized by ferric iron-specific chelators, known as siderophores is imported into the cell by transmembrane transport or endocytosis.

Sequence domains and features

Domain and signature matches imported from InterPro and related databases.

40 records
Show feature table
Start End DB Term Name
224 243 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
149 159 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
306 316 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
202 224 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
101 123 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
133 155 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
66 88 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
245 267 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
131 148 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
12 335 Gene3D G3DSA:1.10.3470.10 ABC transporter involved in vitamin B12 uptake, BtuC
12 335 InterPro IPR037294 ABC transporter, BtuC-like
68 88 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
100 125 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
1 16 Phobius SIGNAL_PEPTIDE_N_REGION N-terminal region of a signal peptide.
283 305 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
14 336 FunFam G3DSA:1.10.3470.10:FF:000001 Vitamin B12 ABC transporter permease BtuC
160 181 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
314 336 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
20 42 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
83 331 CDD cd06550 TM_ABC_iron-siderophores_like
15 333 PANTHER PTHR30472 FERRIC ENTEROBACTIN TRANSPORT SYSTEM PERMEASE PROTEIN
15 333 InterPro IPR000522 ABC transporter, permease protein, BtuC-like
1 37 Phobius SIGNAL_PEPTIDE Signal peptide region
282 301 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
89 99 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
25 334 Pfam PF01032 FecCD transport family
25 334 InterPro IPR000522 ABC transporter, permease protein, BtuC-like
201 223 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
337 337 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
17 32 Phobius SIGNAL_PEPTIDE_H_REGION Hydrophobic region of a signal peptide.
33 37 Phobius SIGNAL_PEPTIDE_C_REGION C-terminal region of a signal peptide.
317 336 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
38 67 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
126 130 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
160 182 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
9 334 SUPERFAMILY SSF81345 ABC transporter involved in vitamin B12 uptake, BtuC
9 334 InterPro IPR037294 ABC transporter, BtuC-like
182 200 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
244 271 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
272 282 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.

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.

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Pocket score High Medium Low
How colors and pocket overlays are used
Uniform protein color marks the displayed model as a single molecular object.
Experimental PDB structures may be colored by chain to distinguish subunits or copies present in the file.
Pocket colors and alpha spheres are evidence overlays for predicted binding cavities; they are not alternative protein chains.
'Alpha spheres' is FPocket's own cavity-shape geometry, imported when available and aligned with the loaded structure.
'Pocket atoms'/'Predicted site atoms' show the pocket's residue atoms instead: P2Rank reports residues rather than alpha spheres, and FPocket falls back to this when alpha-sphere geometry is unavailable or doesn't align.
'No pocket geometry' means neither alpha spheres nor residue-position data could be found for that pocket; the layer just highlights the same residues as 'Nearby residues'.
Pocket details Inspect a specific pocket, or open the full viewer

Binding pockets · P2Rank

Druggability (P2Rank): high ≥ 0.5 · medium 0.2–0.49 · low < 0.2

Pocket 1 P2Rank #1
0.182
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Surrounding area
Pocket 2 P2Rank #2
0.165
Likely same site as FPocket 8 0.8 Å 8 shared residues 89% of smaller site
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Surrounding area
Pocket 3 P2Rank #3
0.058
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Surrounding area
Pocket 4 P2Rank #4
0.048
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Surrounding area
Pocket 5 P2Rank #5
0.032
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Surrounding area

Binding pockets · FPocket

Druggability (FPocket): high ≥ 0.7 · medium 0.4–0.69 · low < 0.4

Pocket 1 FPocket #8
0.724
Likely same site as P2Rank 2 0.8 Å 8 shared residues 89% of smaller site
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Surrounding area
Pocket 2 FPocket #24
0.241 Unusual size
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Surrounding area
All structural evidence 0 experimental · 2 predicted

Structural evidence

0 + 2

Experimental 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_A0A0H3GR28
AlphaFold DB full sequence Viewing
ColabFold KP13_05335
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.

52 records
Chemistry signal

Structural ligand evidence is available for this target.

Direct evidence 0 same-protein records
Transferred evidence 2 records from similar proteins
Structural ligands 2 0 loaded crystals
Measured bioactivity 0 direct and transferred ChEMBL records
Proposed compounds 50 similarity-based ZINC candidates
Best available ligand signal
ANP PDB via homolog 506.2 Da · LogP -2.06 · TPSA 281.9 Open detail RCSB PDB
LDA PDB via homolog Detail RCSB PDB
ZINC1849937 ZINC proposed compound · Tanimoto 1.000 Detail ZINC
ZINC2008702 ZINC proposed compound · Tanimoto 1.000 Detail ZINC
ZINC2039372 ZINC proposed compound · Tanimoto 1.000 Detail ZINC

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.

Show only:
Ligand Source crystal UniProt (homolog) MW · LogP · TPSA Lipinski PAINS SMILES
ANP RCSB PDB P06609 506.2 Da LogP -2.06 TPSA 281.9 3 viol. ✓ Clean c1nc(c2c(n1)n(cn2)[C@H]3[C@@H]([C@@H]([C@H](O3)…
LDA RCSB PDB P06609 229.4 Da LogP 4.48 TPSA 23.1 ✓ Ro5 ✓ Clean CCCCCCCCCCCC[N+](C)(C)[O-]

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.