KpATCC43816 Protein target profile

transporter associated domain protein

Accession: VK055_0145

Gene: AIK78773.1 3D evidence: AlphaFold DB model + ColabFold model Metabolism Not in network UniProt A0A0H3GV98
Length 535
Pocket druggability (P2Rank · AlphaFold DB model) 0.777
Direct ligand evidence 0 154 total records
Functional annotation 0 EC 11 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
2.3% of screened genomes Lower prevalence suggests narrower overlap with the screened gut microbiome.

Essentiality

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

Structure confidence

ColabFold pLDDT
86.41 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) 0.777
Structure A0A0H3GV98
Pocket Pocket 1
Druggability (FPocket) 0.654
Structure A0A0H3GV98
Pocket Pocket 6
ColabFold model
P2Rank 0.599 · Pocket 1
FPocket 0.728 · Pocket 29
Core conservation Conserved core gene
Roary core
CoreCruncher core
Gut microbiome 110 / 4744 genomes with a hit
Prevalence 2.3%

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.

MLAGIDGIGGIPFDNYPFAYMVSNLALAVILLDGGMRTQASSFRVALWPALSLATVGVLITSALTGMMAAWLFKLDLIEGLLIGAIVGSTDAAAVFSLLGGKGLNERVGSTLEIESGSNDPMAVFLTITLIEMIQQHQTGLSWMFAVHIIQQFGLGIAIGLGGGYLLLQMINRIVLPAGLYPLLALSGGIMIFAVTTSLDGSGILAVYLCGFLLGNRPIRNRHGILQNFDGLAWLAQIAMFLVLGLLVTPSDLLPIAIPALLLSMWMIFIARPLSVFAGLLPFRGFNLRERVFISWVGLRGAVPIILAVFPMMAGLDNARLFFNVAFFVVLVSLLLQGTSLSWAAKKAKVVVPPISWPISRVGLDIHPENPWEQFVYQLGADKWCIGAALRDLHMPPETRIAALFRNNVLLHPTGSTRLREGDILCVIGREHDLPALGKMFSQSPPVALDQRFFGDFILDAEARFADVAQIYGLDGGEDFREHQQSLGEVVQQLLGAAPVVGDQVEFAGMVWTVAEKENDHVLKVGVRVAEDEAE

Functional annotations

Enzyme classification and Gene Ontology terms linked to this protein.

11 GO

Subcellular localization

Localization
CytoplasmicMembrane

Gene Ontology (GO)

11
  • GO:0016020 A lipid bilayer along with all the proteins and protein complexes embedded in it and attached to it.
  • GO:0006812 The directed movement of a monoatomic cation, into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore. Monatomic cations (also called simple cations) are positively charged ions consisting of exactly one atom.
  • GO:0008324 Enables the transfer of cation from one side of a membrane to the other.
  • GO:0050660 Binding to FAD, flavin-adenine dinucleotide, the coenzyme or the prosthetic group of various flavoprotein oxidoreductase enzymes, in either the oxidized form, FAD, or the reduced form, FADH2.
  • GO:0055085 The process in which a solute is transported across a lipid bilayer, from one side of a membrane to the other.
  • GO:1902600 The directed movement of a proton across a membrane.
  • GO:0015297 Enables the active transport of a solute across a membrane by a mechanism whereby two or more species are transported in opposite directions in a tightly coupled process not directly linked to a form of energy other than chemiosmotic energy. The reaction is: solute A(out) + solute B(in) = solute A(in) + solute B(out).
  • GO:0006813 The directed movement of potassium ions (K+) into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore.
  • 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:0015386 Enables the transfer of a solute or solutes from one side of a membrane to the other according to the reaction: K+(in) + H+(out) = K+(out) + H+(in).
  • GO:0006884 Any process involved in maintaining the steady state of a cell's volume. The cell's volume refers to the three-dimensional space occupied by a cell.

Sequence domains and features

Domain and signature matches imported from InterPro and related databases.

52 records
Show feature table
Start End DB Term Name
196 200 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
201 219 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
321 339 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
45 67 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
77 99 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
46 71 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
319 341 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
138 142 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
1 517 PANTHER PTHR32507 NA(+)/H(+) ANTIPORTER 1
452 529 Pfam PF03471 Transporter associated domain
452 529 InterPro IPR005170 Transporter-associated domain
361 443 ProSiteProfiles PS51202 RCK C-terminal domain profile.
361 443 InterPro IPR006037 Regulator of K+ conductance, C-terminal
379 441 Pfam PF02080 TrkA-C domain
379 441 InterPro IPR006037 Regulator of K+ conductance, C-terminal
168 173 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
15 32 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
340 535 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
143 167 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
77 128 Gene3D G3DSA:6.10.140.1330 -
231 250 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
377 441 SUPERFAMILY SSF116726 TrkA C-terminal domain-like
377 441 InterPro IPR036721 Regulator of K+ conductance, C-terminal domain superfamily
120 137 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
446 529 Gene3D G3DSA:3.30.465.10 -
446 529 InterPro IPR016169 FAD-binding, type PCMH, subdomain 2
225 247 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
174 195 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
293 315 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
16 34 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
257 279 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
72 76 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
251 255 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
292 314 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
282 292 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
153 175 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
77 99 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
17 346 Pfam PF00999 Sodium/hydrogen exchanger family
17 346 InterPro IPR006153 Cation/H+ exchanger
35 45 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
1 15 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
455 529 SUPERFAMILY SSF56176 FAD-binding/transporter-associated domain-like
455 529 InterPro IPR036318 FAD-binding, type PCMH-like superfamily
256 281 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
100 119 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
369 442 Gene3D G3DSA:3.30.70.1450 -
369 442 InterPro IPR036721 Regulator of K+ conductance, C-terminal domain superfamily
190 212 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
316 320 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
220 230 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
450 531 SMART SM01091 CorC_HlyC_2
450 531 InterPro IPR005170 Transporter-associated 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.

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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
0.777
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Surrounding area
Pocket 2 P2Rank #2
0.651
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Surrounding area
Pocket 3 P2Rank #3
0.315
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Surrounding area
Pocket 4 P2Rank #4
0.24
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Surrounding area
Pocket 5 P2Rank #5
0.179
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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 #6
0.654
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Surrounding area
Pocket 2 FPocket #37
0.533
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Surrounding area
Pocket 3 FPocket #39
0.306 Unusual size
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Surrounding area
Pocket 4 FPocket #22
0.224
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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_A0A0H3GV98
AlphaFold DB full sequence Viewing
ColabFold VK055_0145
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
BOG PDB via homolog 292.4 Da · LogP 0.16 · TPSA 99.4 Open detail RCSB PDB
FLC PDB via homolog Detail RCSB PDB
PTY PDB via homolog Detail RCSB PDB
TAM PDB via homolog Detail RCSB PDB
CHEMBL3965282 ChEMBL via homolog · pchembl 9.20 (~0.6 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
BOG RCSB PDB Q9UZ55 292.4 Da LogP 0.16 TPSA 99.4 ✓ Ro5 ✓ Clean CCCCCCCCO[C@H]1[C@@H]([C@H]([C@@H]([C@H](O1)CO)…
FLC RCSB PDB Q9UZ55 189.1 Da LogP -5.25 TPSA 140.6 ✓ Ro5 ✓ Clean C(C(=O)[O-])C(CC(=O)[O-])(C(=O)[O-])O
PTY RCSB PDB Q9UZ55 734.1 Da LogP 11.67 TPSA 134.4 2 viol. ✓ Clean CCCCCCCCCCCCCCCCCCCC(=O)O[C@H](COC(=O)CCCCCCCCC…
TAM RCSB PDB Q60362 163.2 Da LogP -1.17 TPSA 86.7 ✓ Ro5 ✓ Clean C(CO)C(CCO)(CCO)N

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 CHEMBL3965282 ChEMBL CHEMBL3926527 ChEMBL CHEMBL3897251 ChEMBL CHEMBL3960838 ChEMBL CHEMBL3937928 ChEMBL CHEMBL3968241 ChEMBL CHEMBL3976660 ChEMBL CHEMBL3990220 ChEMBL CHEMBL3894457 ChEMBL CHEMBL3932620 ChEMBL CHEMBL3940439 ChEMBL CHEMBL3970997 ChEMBL CHEMBL3972891 ChEMBL CHEMBL3976345 ChEMBL CHEMBL3965836 ChEMBL CHEMBL3982724 ChEMBL CHEMBL3301627 ChEMBL CHEMBL3891308 ChEMBL CHEMBL3983258 ChEMBL CHEMBL5202545 ChEMBL CHEMBL3895338 ChEMBL CHEMBL3901000 ChEMBL CHEMBL3901687 ChEMBL CHEMBL3909990 ChEMBL CHEMBL3930643 ChEMBL CHEMBL3304485 ChEMBL CHEMBL3906068 ChEMBL CHEMBL3961536 ChEMBL CHEMBL3987020 ChEMBL CHEMBL5170002 ChEMBL CHEMBL5202068 ChEMBL CHEMBL3892788 ChEMBL CHEMBL3908998 ChEMBL CHEMBL3913347 ChEMBL CHEMBL3940580 ChEMBL CHEMBL3946862 ChEMBL CHEMBL3947345 ChEMBL CHEMBL5170188 ChEMBL CHEMBL3933814 ChEMBL CHEMBL3935259 ChEMBL CHEMBL3945874 ChEMBL CHEMBL3968950 ChEMBL CHEMBL3979252 ChEMBL CHEMBL4285957 ChEMBL CHEMBL3902600 ChEMBL CHEMBL3911750 ChEMBL CHEMBL3920558 ChEMBL CHEMBL3943152 ChEMBL CHEMBL3949556 ChEMBL CHEMBL3979206 ChEMBL CHEMBL3983692 ChEMBL CHEMBL4278191 ChEMBL CHEMBL3948263 ChEMBL CHEMBL4283742 ChEMBL CHEMBL3908412 ChEMBL CHEMBL4280721 ChEMBL CHEMBL3908892 ChEMBL CHEMBL3921641 ChEMBL CHEMBL3951816 ChEMBL CHEMBL3962344 ChEMBL CHEMBL3985868 ChEMBL CHEMBL3985915 ChEMBL CHEMBL4284044 ChEMBL CHEMBL5172917 ChEMBL CHEMBL5200502 ChEMBL CHEMBL4283188 ChEMBL CHEMBL3911951 ChEMBL CHEMBL3895518 ChEMBL CHEMBL3903230 ChEMBL CHEMBL3905716 ChEMBL CHEMBL3908997 ChEMBL CHEMBL3909026 ChEMBL CHEMBL3932568 ChEMBL CHEMBL3952672 ChEMBL CHEMBL3958090 ChEMBL CHEMBL3960033 ChEMBL CHEMBL3967281 ChEMBL CHEMBL3978115 ChEMBL CHEMBL3984342 ChEMBL CHEMBL4282462 ChEMBL CHEMBL3904443 ChEMBL CHEMBL3957021 ChEMBL CHEMBL4284462 ChEMBL CHEMBL4292682 ChEMBL CHEMBL3906248 ChEMBL CHEMBL3910676 ChEMBL CHEMBL3935315 ChEMBL CHEMBL3950244 ChEMBL CHEMBL3954142 ChEMBL CHEMBL3971033 ChEMBL CHEMBL3972691 ChEMBL CHEMBL3972753 ChEMBL CHEMBL4284668 ChEMBL CHEMBL4289255 ChEMBL CHEMBL3897440 ChEMBL CHEMBL3953888 ChEMBL CHEMBL4285711 ChEMBL CHEMBL4294068 ChEMBL CHEMBL3964255 ChEMBL CHEMBL3911510