KpATCC43816 Protein target profile

H+ symporter family protein

Accession: VK055_3552

Gene: AIK82108.1 3D evidence: AlphaFold DB model + ColabFold model Metabolism Not in network UniProt A0A0H3H4D8
Length 451
Pocket druggability (P2Rank · AlphaFold DB model) 0.882
Direct ligand evidence 0 70 total records
Functional annotation 0 EC 5 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 (%)
31.677 Lower values reduce human off-target concern.
Human E-value
4.05e-06
Gut microbiome similarity
0.8% of screened genomes Lower prevalence suggests narrower overlap with the screened gut microbiome.

Essentiality

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

Structure confidence

ColabFold pLDDT
90.01 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) 0.882
Structure A0A0H3H4D8
Pocket Pocket 1
Druggability (FPocket) 0.727
Structure A0A0H3H4D8
Pocket Pocket 22
ColabFold model
P2Rank 0.891 · Pocket 1
FPocket 0.58 · Pocket 16
Core conservation Conserved core gene
Roary core
CoreCruncher core
Gut microbiome 38 / 4744 genomes with a hit
Prevalence 0.8%

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.

MTKTTIDIQAFINEHPFTRYQWMILALCFITVAMDGFDTAIIGFIASDLVQEWGVEKSALGPVMSAALVGLAVGALTAGPLADRIGRKKVLIMSIVVFGGFSLLTAFATSLNQLTLLRFLTGLGLGAAMPNAATLMSEYAPERRRALLVNLMFVGFPMGSSLGGFLSAWMIPHYGWQSVLVLGGVMPLLLAVALIFLLPESVRYLVVKQHPAQRIAAILRRIAPLPKAVEFVLREAGQVKEKSAIGVIFSPRYAVGTVMLCLTYFMGLLIFYLLTSWLPLLIRETGASMSQASIITALFPLGGGIGVLILGALMDKINPNKVVAVGWLLTGVFVCLVGFSTSSLALMGVMVFIAGSIMNGAQSSMPALAAGFYPTQGRATGVAWMLGIGRFGGILGAFSGTFLMQAQLSFETIFTLLAIPAFLSAIALLIKYRVSKSVPATTDEARSLQKA

Functional annotations

Enzyme classification and Gene Ontology terms linked to this protein.

5 GO

Subcellular localization

Localization
CytoplasmicMembrane

Gene Ontology (GO)

5
  • 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:0016020 A lipid bilayer along with all the proteins and protein complexes embedded in it and attached to it.
  • GO:0055085 The process in which a solute is transported across a lipid bilayer, 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:0046943 Enables the transfer of carboxylic acids from one side of a membrane to the other. Carboxylic acids are organic acids containing one or more carboxyl (COOH) groups or anions (COO-).

Sequence domains and features

Domain and signature matches imported from InterPro and related databases.

55 records
Show feature table
Start End DB Term Name
325 347 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
29 282 Pfam PF07690 Major Facilitator Superfamily
29 282 InterPro IPR011701 Major facilitator superfamily
78 94 ProSitePatterns PS00216 Sugar transport proteins signature 1.
78 94 InterPro IPR005829 Sugar transporter, conserved site
25 435 CDD cd17365 MFS_PcaK_like
120 145 ProSitePatterns PS00217 Sugar transport proteins signature 2.
120 145 InterPro IPR005829 Sugar transporter, conserved site
199 252 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
252 440 Gene3D G3DSA:1.20.1250.20 MFS general substrate transporter like domains
252 440 InterPro IPR036259 MFS transporter superfamily
79 89 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
352 374 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
111 115 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
90 110 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
116 135 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
147 170 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
314 321 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
408 430 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
345 361 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
14 224 Gene3D G3DSA:1.20.1250.20 MFS general substrate transporter like domains
14 224 InterPro IPR036259 MFS transporter superfamily
381 403 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
23 45 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
176 198 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
275 293 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
9 441 PANTHER PTHR23508 CARBOXYLIC ACID TRANSPORTER PROTEIN HOMOLOG
136 146 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
179 198 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
1 19 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
60 82 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
48 58 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
89 111 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
171 175 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
7 403 NCBIfam TIGR00895 aromatic acid/H+ symport family MFS transporter
7 403 InterPro IPR004746 Major facilitator superfamily, aromatic acid:H+ symporter family
116 135 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
24 436 ProSiteProfiles PS50850 Major facilitator superfamily (MFS) profile.
24 436 InterPro IPR020846 Major facilitator superfamily domain
291 313 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
253 274 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
407 411 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
382 406 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
12 436 SUPERFAMILY SSF103473 MFS general substrate transporter
12 436 InterPro IPR036259 MFS transporter superfamily
294 313 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
412 430 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
20 47 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
147 169 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
59 78 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
340 344 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
322 339 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
431 451 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
362 381 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
254 276 TMHMM TMhelix 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
0.882
Likely same site as FPocket 30 0.7 Å 21 shared residues 95% of smaller site
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Surrounding area
Pocket 2 P2Rank #2
0.287
Likely same site as FPocket 22 2.0 Å 9 shared residues 82% of smaller site
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Surrounding area
Pocket 3 P2Rank #3
0.171
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Surrounding area
Pocket 4 P2Rank #4
0.141
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Surrounding area
Pocket 5 P2Rank #5
0.056
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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 #22
0.727
Likely same site as P2Rank 2 2.0 Å 9 shared residues 82% of smaller site
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Surrounding area
Pocket 2 FPocket #30
0.68 Unusual size
Likely same site as P2Rank 1 0.7 Å 21 shared residues 95% of smaller site
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Surrounding area
Pocket 3 FPocket #23
0.247
Show in viewer
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_A0A0H3H4D8
AlphaFold DB full sequence Viewing
ColabFold VK055_3552
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.

70 records
Chemistry signal

Structural and bioactivity evidence are both available for this target.

Direct evidence 0 same-protein records
Transferred evidence 20 records from similar proteins
Structural ligands 1 0 loaded crystals
Measured bioactivity 19 direct and transferred ChEMBL records
Proposed compounds 50 similarity-based ZINC candidates
Best available ligand signal
J0M PDB via homolog 196.2 Da · LogP -3.49 · TPSA 138.5 Open detail RCSB PDB
CHEMBL339858 ChEMBL via homolog · pchembl 6.96 (~109.6 nM) Detail ChEMBL
CHEMBL2074851 ChEMBL via homolog · pchembl 6.89 (~128.8 nM) Detail ChEMBL
CHEMBL2074704 ChEMBL via homolog · pchembl 6.75 (~177.8 nM) Detail ChEMBL
CHEMBL790 ChEMBL via homolog · pchembl 6.68 (~208.9 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
J0M RCSB PDB J7QAK3 196.2 Da LogP -3.49 TPSA 138.5 1 viol. ✓ Clean C([C@H]([C@@H]([C@@H]([C@H](C(=O)O)O)O)O)O)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.