KpATCC43816 Protein target profile

sodium Bile acid symporter family protein

Accession: VK055_3063

Gene: AIK81648.1 3D evidence: AlphaFold DB model + ColabFold model Metabolism Not in network UniProt A0A0H3GHE8
Length 309
Pocket druggability (P2Rank · AlphaFold DB model) 0.937
Direct ligand evidence 0 154 total records
Functional annotation 0 EC 1 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
Hit
Human identity (%)
30.222 Lower values reduce human off-target concern.
Human E-value
1.36e-17
Gut microbiome similarity
1.8% of screened genomes Lower prevalence suggests narrower overlap with the screened gut microbiome.

Essentiality

Essential (DEG)
N
DEG identity (%)
0.0 Higher values support similarity to known essential genes.

Structure confidence

ColabFold pLDDT
93.51 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) 0.937
Structure A0A0H3GHE8
Pocket Pocket 1
Druggability (FPocket) 0.954
Structure A0A0H3GHE8
Pocket Pocket 20
ColabFold model
P2Rank 0.887 · Pocket 1
FPocket 0.944 · Pocket 20
Core conservation Conserved core gene
Roary core
CoreCruncher core
Gut microbiome 87 / 4744 genomes with a hit
Prevalence 1.8%

Metabolic context

Reactions catalyzed, pathway membership, and centrality in the genome-scale metabolic network.

This protein is not associated with the imported metabolic network for this genome.

Browse the genome's metabolic network

Imported from KpATCC43816.sbml · 2026-07-09

Sequence

Primary amino-acid sequence viewer.

MLATLTRLFPLWALLLSVLAYYTPTTFTPIGPWVTTLLMLIMFGMGVHLKLEDFKRVLSRPAPVAAGIFLHYLVMPLAAWLLALLFHMPPELSAGMVLVGSVASGTASNVMIFLAKGDVALSVTISSVSTLVGVVATPLLTRLYVDAHIQVDVMGMLLSILQIVVIPIALGLIVHHLLPKVVKAVEPFLPAFSMVCILAIISAVVAGSAAHIASVGLVVIIAVILHNTIGLLGGYWGGRLFGFDESTCRTLAIEVGMQNSGLAAALGKIYFGPLAALPGALFSVWHNLSGSLLAGYWSGKPIAKKADKR

Functional annotations

Enzyme classification and Gene Ontology terms linked to this protein.

1 GO

Subcellular localization

Localization
CytoplasmicMembrane

Gene Ontology (GO)

1
  • GO:0016020 A lipid bilayer along with all the proteins and protein complexes embedded in it and attached to it.

Sequence domains and features

Domain and signature matches imported from InterPro and related databases.

35 records
Show feature table
Start End DB Term Name
87 91 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
52 62 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
187 206 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
1 306 Gene3D G3DSA:1.20.1530.20 -
1 306 InterPro IPR038770 Sodium/solute symporter superfamily
8 16 Phobius SIGNAL_PEPTIDE_H_REGION Hydrophobic region of a signal peptide.
1 20 SignalP_EUK SignalP-TM SignalP-TM
21 29 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
64 86 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
93 115 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
153 175 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
207 211 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
4 23 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
215 237 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
119 141 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
30 49 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
30 51 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
176 186 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
92 112 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
1 20 Phobius SIGNAL_PEPTIDE Signal peptide region
36 213 Pfam PF01758 Sodium Bile acid symporter family
36 213 InterPro IPR002657 Bile acid:sodium symporter/arsenical resistance protein Acr3
1 7 Phobius SIGNAL_PEPTIDE_N_REGION N-terminal region of a signal peptide.
17 20 Phobius SIGNAL_PEPTIDE_C_REGION C-terminal region of a signal peptide.
153 175 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
188 210 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
212 236 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
63 86 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
275 297 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
2 306 PANTHER PTHR10361 SODIUM-BILE ACID COTRANSPORTER
2 306 InterPro IPR004710 Bile acid:sodium symporter
237 309 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
113 118 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
142 152 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
119 141 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.

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
0.937
Likely same site as FPocket 20 5.0 Å 21 shared residues 81% of smaller site
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Surrounding area
Pocket 2 P2Rank #2
0.311
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Surrounding area
Pocket 3 P2Rank #3
0.11
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Surrounding area
Pocket 4 P2Rank #4
0.073
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Surrounding area
Pocket 5 P2Rank #5
0.012
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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 #20
0.954 Unusual size
Likely same site as P2Rank 1 5.0 Å 21 shared residues 81% of smaller site
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Surrounding area
Pocket 2 FPocket #4
0.297
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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_A0A0H3GHE8
AlphaFold DB full sequence Viewing
ColabFold VK055_3063
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.

154 records
Chemistry signal

Structural and bioactivity evidence are both available for this target.

Direct evidence 0 same-protein records
Transferred evidence 104 records from similar proteins
Structural ligands 4 0 loaded crystals
Measured bioactivity 100 direct and transferred ChEMBL records
Proposed compounds 50 similarity-based ZINC candidates
Best available ligand signal
A6L PDB via homolog 356.5 Da · LogP 4.92 · TPSA 66.8 Open detail RCSB PDB
LDA PDB via homolog Detail RCSB PDB
PTY PDB via homolog Detail RCSB PDB
TCH PDB via homolog Detail RCSB PDB
CHEMBL2387397 ChEMBL via homolog · pchembl 9.70 (~0.2 nM) Detail ChEMBL

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
A6L RCSB PDB A0A380PV03 356.5 Da LogP 4.92 TPSA 66.8 ✓ Ro5 ✓ Clean CCCCCCCC/C=C\CCCCCCCC(=O)OCC(CO)O
LDA RCSB PDB Q9K0A9 229.4 Da LogP 4.48 TPSA 23.1 ✓ Ro5 ✓ Clean CCCCCCCCCCCC[N+](C)(C)[O-]
PTY RCSB PDB Q9K0A9 734.1 Da LogP 11.67 TPSA 134.4 2 viol. ✓ Clean CCCCCCCCCCCCCCCCCCCC(=O)O[C@H](COC(=O)CCCCCCCCC…
TCH RCSB PDB Q9K0A9 515.7 Da LogP 2.37 TPSA 144.2 1 viol. ✓ Clean C[C@H](CCC(=O)NCCS(=O)(=O)O)[C@H]1CC[C@@H]2[C@@…

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.

Chemistry

ChEMBL CHEMBL2387397 ChEMBL CHEMBL363392 ChEMBL CHEMBL370103 ChEMBL CHEMBL364676 ChEMBL CHEMBL194685 ChEMBL CHEMBL555246 ChEMBL CHEMBL2385105 ChEMBL CHEMBL195012 ChEMBL CHEMBL3658914 ChEMBL CHEMBL372080 ChEMBL CHEMBL332974 ChEMBL CHEMBL2387408 ChEMBL CHEMBL193847 ChEMBL CHEMBL197508 ChEMBL CHEMBL2387421 ChEMBL CHEMBL2387520 ChEMBL CHEMBL3658886 ChEMBL CHEMBL3658901 ChEMBL CHEMBL372275 ChEMBL CHEMBL372324 ChEMBL CHEMBL3959109 ChEMBL CHEMBL540126 ChEMBL CHEMBL555022 ChEMBL CHEMBL194461 ChEMBL CHEMBL196032 ChEMBL CHEMBL2387399 ChEMBL CHEMBL3956446 ChEMBL CHEMBL332973 ChEMBL CHEMBL3658876 ChEMBL CHEMBL555024 ChEMBL CHEMBL611748 ChEMBL CHEMBL3907170 ChEMBL CHEMBL196459 ChEMBL CHEMBL426152 ChEMBL CHEMBL193439 ChEMBL CHEMBL194420 ChEMBL CHEMBL196029 ChEMBL CHEMBL2387521 ChEMBL CHEMBL2387522 ChEMBL CHEMBL2387527 ChEMBL CHEMBL3658874 ChEMBL CHEMBL380601 ChEMBL CHEMBL3945133 ChEMBL CHEMBL197311 ChEMBL CHEMBL194792 ChEMBL CHEMBL196475 ChEMBL CHEMBL197639 ChEMBL CHEMBL540128 ChEMBL CHEMBL122498 ChEMBL CHEMBL196280 ChEMBL CHEMBL2387510 ChEMBL CHEMBL3658888 ChEMBL CHEMBL3658910 ChEMBL CHEMBL18219 ChEMBL CHEMBL3897389 ChEMBL CHEMBL196443 ChEMBL CHEMBL555245 ChEMBL CHEMBL371033 ChEMBL CHEMBL382076 ChEMBL CHEMBL426998 ChEMBL CHEMBL341104 ChEMBL CHEMBL370585 ChEMBL CHEMBL372088 ChEMBL CHEMBL383184 ChEMBL CHEMBL2387511 ChEMBL CHEMBL371075 ChEMBL CHEMBL538907 ChEMBL CHEMBL196243 ChEMBL CHEMBL3918908 ChEMBL CHEMBL196658 ChEMBL CHEMBL197271 ChEMBL CHEMBL2387420 ChEMBL CHEMBL197152 ChEMBL CHEMBL2387526 ChEMBL CHEMBL3658902 ChEMBL CHEMBL194614 ChEMBL CHEMBL2387519 ChEMBL CHEMBL3658877 ChEMBL CHEMBL3658903 ChEMBL CHEMBL446700 ChEMBL CHEMBL196482 ChEMBL CHEMBL3658915 ChEMBL CHEMBL3658878 ChEMBL CHEMBL372426 ChEMBL CHEMBL3658912 ChEMBL CHEMBL370737 ChEMBL CHEMBL193344 ChEMBL CHEMBL332370 ChEMBL CHEMBL340291 ChEMBL CHEMBL194239 ChEMBL CHEMBL125997 ChEMBL CHEMBL196005 ChEMBL CHEMBL380789 ChEMBL CHEMBL364224 ChEMBL CHEMBL370572 ChEMBL CHEMBL2387525 ChEMBL CHEMBL2387529 ChEMBL CHEMBL341082 ChEMBL CHEMBL2387398 ChEMBL CHEMBL364658