KpATCC43816 Protein target profile

sulfate transporter family protein

Accession: VK055_2768

Gene: AIK81357.1 3D evidence: AlphaFold DB model + ColabFold model Metabolism Not in network UniProt A0A0H3GLU3
Length 489
Pocket druggability (P2Rank · AlphaFold DB model) 0.645
Direct ligand evidence 0 52 total records
Functional annotation 0 EC 2 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 (%)
33.846 Lower values reduce human off-target concern.
Human E-value
1.56e-09
Gut microbiome similarity
0.4% of screened genomes Lower prevalence suggests narrower overlap with the screened gut microbiome.

Essentiality

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

Structure confidence

ColabFold pLDDT
90.26 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) 0.645
Structure A0A0H3GLU3
Pocket Pocket 1
Druggability (FPocket) 0.915
Structure A0A0H3GLU3
Pocket Pocket 11
ColabFold model
P2Rank 0.693 · Pocket 1
FPocket 0.988 · Pocket 2
Core conservation Conserved core gene
Roary core
CoreCruncher core
Gut microbiome 18 / 4744 genomes with a hit
Prevalence 0.4%

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.

MNTLRQDSLAGIVVFLVALPLCLGIAQASGLPPFVGLLTGIIGGLVVTALSPSRFAVSGPAAGLVTIVVAAIESLGSFSVFLMALVLAGALQLLFGILRAGRFISLVPASVIKGMLAAIGILLIMQQIPVALGTAEETGLADVVQGNAAFSVKAIAVAAGGLLVLWLWGSPLIRRVKSLRWIPGPLIAVLLGCVTTLLLTHFAPQQLAALPRITLPAFGSLGDLLGELESPAWNAWRNPSVWVVAVTLALVASLETLLSQEALKKLRPQNPPPSPNREMVAQGVGNLLSGVLGAMPITAVIVRSSVNVSNGAQSKLSIFIHGVLLLICGLWFSGLLTLIPLASLAAVLLYTGYKLATPRLFIEQFRQGAAQYVPFLATIGGIIAFGMLAGIGIGLATQMAFSLWRSHRHSLQLARYDDHYVLRIQQNLTFMHNPHLLALLAKIPEKSVVIVEHDSVGYLDPDVRAVLDDFAENAPQRGIRLNQWPLASR

Functional annotations

Enzyme classification and Gene Ontology terms linked to this protein.

2 GO

Subcellular localization

Localization
CytoplasmicMembrane

Gene Ontology (GO)

2
  • 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.

Sequence domains and features

Domain and signature matches imported from InterPro and related databases.

41 records
Show feature table
Start End DB Term Name
4 479 PANTHER PTHR11814 SULFATE TRANSPORTER
4 479 InterPro IPR001902 SLC26A/SulP transporter
55 72 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
181 203 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
20 24 Phobius SIGNAL_PEPTIDE_C_REGION C-terminal region of a signal peptide.
307 317 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
280 302 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
110 128 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
318 351 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
204 239 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
148 169 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
51 54 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
9 28 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
103 125 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
259 278 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
4 357 Pfam PF00916 Sulfate permease family
4 357 InterPro IPR011547 SLC26A/SulP transporter domain
240 258 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
55 72 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
240 259 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
1 28 SignalP_EUK SignalP-TM SignalP-TM
372 396 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
25 33 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
76 98 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
129 147 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
181 203 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
1 7 Phobius SIGNAL_PEPTIDE_N_REGION N-terminal region of a signal peptide.
397 489 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
99 109 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
8 19 Phobius SIGNAL_PEPTIDE_H_REGION Hydrophobic region of a signal peptide.
33 50 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
170 180 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
352 371 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
78 98 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
73 77 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
372 394 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
279 306 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
1 24 Phobius SIGNAL_PEPTIDE Signal peptide region
147 169 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
34 50 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
317 351 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
0.645
Likely same site as FPocket 10 2.7 Å 17 shared residues 94% of smaller site
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Surrounding area
Pocket 2 P2Rank #2
0.466
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Surrounding area
Pocket 3 P2Rank #3
0.373
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Surrounding area
Pocket 4 P2Rank #4
0.331
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Surrounding area
Pocket 5 P2Rank #5
0.251
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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 #11
0.915
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Surrounding area
Pocket 2 FPocket #10
0.867 Unusual size
Likely same site as P2Rank 1 2.7 Å 17 shared residues 94% of smaller site
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_A0A0H3GLU3
AlphaFold DB full sequence Viewing
ColabFold VK055_2768
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
DMU PDB via homolog 482.6 Da · LogP -1.23 · TPSA 178.5 Open detail RCSB PDB
OLC PDB via homolog Detail RCSB PDB
ZINC100053689 ZINC proposed compound · Tanimoto 1.000 Detail ZINC
ZINC100053691 ZINC proposed compound · Tanimoto 1.000 Detail ZINC
ZINC1501015302 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
DMU RCSB PDB Q1J2S8 482.6 Da LogP -1.23 TPSA 178.5 2 viol. ✓ Clean CCCCCCCCCCO[C@H]1[C@@H]([C@H]([C@@H]([C@H](O1)C…
OLC RCSB PDB Q55415 356.5 Da LogP 4.92 TPSA 66.8 ✓ Ro5 ✓ Clean CCCCCCCC\C=C/CCCCCCCC(=O)OC[C@@H](CO)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.