KpATCC43816 Protein target profile

sulfate permease family protein

Accession: VK055_0210

Gene: sulP AIK78839.1 3D evidence: AlphaFold DB model + ColabFold model Metabolism Not in network UniProt A0A0H3GV23
Length 550
Pocket druggability (P2Rank · AlphaFold DB model) 0.888
Direct ligand evidence 0 54 total records
Functional annotation 0 EC 5 GO
Target summary

Target candidate with partial support; inspect missing evidence before prioritizing.

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 (%)
35.227 Lower values reduce human off-target concern.
Human E-value
1e-22
Gut microbiome similarity
2.6% of screened genomes Lower prevalence suggests narrower overlap with the screened gut microbiome.

Essentiality

Essential (DEG)
Y
DEG identity (%)
90.909 Higher values support similarity to known essential genes.
DEG E-value
0.0 Smaller values mean stronger essential-gene similarity.

Structure confidence

ColabFold pLDDT
92.81 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) 0.888
Structure A0A0H3GV23
Pocket Pocket 1
Druggability (FPocket) 0.391
Structure A0A0H3GV23
Pocket Pocket 29
ColabFold model
P2Rank 0.923 · Pocket 1
FPocket 0.843 · Pocket 12
Core conservation Conserved core gene
Roary core
CoreCruncher core
Gut microbiome 121 / 4744 genomes with a hit
Prevalence 2.6%

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.

MPFRALIDACWKEKYTTARFTRDLIAGITVGIIAIPLAMALAIGSGVPPQYGLYTSAVAGIVIALTGGSRFSVSGPTAAFVVILYPVSQQFGLAGLLVATLMSGIFLILFGLARFGRLIEYIPLSVTLGFTSGIGITIGTMQIKDFLGLQMPHVPEHYLQKVAALAMALPTINVGDAAIGVVTLGILILWPRLGIRLPGHLPALLGGCAVMLVVNLLGGDVATIGSQFHYQLADGTQGNGIPQLLPQLVLPWDMPGSNFTLSWASLQALLPAAFSMAMLGAIESLLCAVVLDGMTGTKHKANSELIGQGLGNIVAPFFGGITATAAIARSAANVRAGATSPVAAVIHALLVILALLILAPLLSWLPLSAMAALLLMVAWNMSEAHKVINLLRHAPKDDIVVMLMCMSLTVLFDMVIAISVGIVLASLLFMRRIARMTHLAPVNVEVPDDVLVLRVIGPLFFAAAEGLFNDLETRIAGKRIVVLKWDAVPVLDAGGLDAFQRFVNKLPEGCELRVSNLEFQPLRTLARAGVKPLPGRLSFYPDRQAALADL

Functional annotations

Enzyme classification and Gene Ontology terms linked to this protein.

5 GO

Subcellular localization

Localization
CytoplasmicMembrane

Gene Ontology (GO)

5
  • GO:0008272 OBSOLETE. The directed movement of sulfate into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore.
  • 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:0008271 Enables the secondary active transfer of sulfate from one side of a membrane to the other. Secondary active transport is the transfer of a solute across a membrane, up its concentration gradient. The transporter binds the solute and undergoes a series of conformational changes. Transport works equally well in either direction and is driven by a chemiosmotic source of energy. Secondary active transporters include symporters and antiporters.
  • GO:0005886 The membrane surrounding a cell that separates the cell from its external environment. It consists of a phospholipid bilayer and associated proteins.

Sequence domains and features

Domain and signature matches imported from InterPro and related databases.

51 records
Show feature table
Start End DB Term Name
442 544 Pfam PF01740 STAS domain
24 44 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
292 311 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
168 190 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
358 363 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
197 219 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
24 46 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
51 71 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
201 218 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
364 381 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
190 200 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
338 357 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
90 112 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
144 162 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
9 546 NCBIfam TIGR00815 sulfate permease
9 546 InterPro IPR001902 SLC26A/SulP transporter
382 400 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
72 90 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
45 50 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
433 550 FunFam G3DSA:3.30.750.24:FF:000008 Sulfate transporter YchM
337 359 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
333 337 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
442 548 SUPERFAMILY SSF52091 SpoIIaa-like
442 548 InterPro IPR036513 STAS domain superfamily
219 267 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
444 542 CDD cd07042 STAS_SulP_like_sulfate_transporter
1 23 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
121 143 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
11 530 PANTHER PTHR11814 SULFATE TRANSPORTER
11 530 InterPro IPR001902 SLC26A/SulP transporter
91 112 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
163 189 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
440 550 ProSiteProfiles PS50801 STAS domain profile.
440 550 InterPro IPR002645 STAS domain
124 143 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
268 290 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
361 379 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
401 429 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
268 291 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
312 332 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
399 430 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
433 550 Gene3D G3DSA:3.30.750.24 STAS domain
433 550 InterPro IPR036513 STAS domain superfamily
20 402 Pfam PF00916 Sulfate permease family
20 402 InterPro IPR011547 SLC26A/SulP transporter domain
310 332 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
442 544 InterPro IPR002645 STAS domain
430 550 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
113 123 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
49 70 ProSitePatterns PS01130 SLC26A transporters signature.
49 70 InterPro IPR018045 Sulphate anion transporter, conserved site

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
0.888
Likely same site as FPocket 29 2.6 Å 27 shared residues 93% of smaller site
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Surrounding area
Pocket 2 P2Rank #2
0.4
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Surrounding area
Pocket 3 P2Rank #3
0.246
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Surrounding area
Pocket 4 P2Rank #4
0.119
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Surrounding area
Pocket 5 P2Rank #5
0.088
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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 #29
0.391 Unusual size
Likely same site as P2Rank 1 2.6 Å 27 shared residues 93% of smaller site
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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_A0A0H3GV23
AlphaFold DB full sequence Viewing
ColabFold VK055_0210
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.

54 records
Chemistry signal

Structural ligand evidence is available for this target.

Direct evidence 0 same-protein records
Transferred evidence 4 records from similar proteins
Structural ligands 4 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
OXL PDB via homolog Detail RCSB PDB
SXM PDB via homolog Detail RCSB PDB
ZINC100053689 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
OXL RCSB PDB A0FKN5 88.0 Da LogP -3.51 TPSA 80.3 ✓ Ro5 ✓ Clean C(=O)(C(=O)[O-])[O-]
SXM RCSB PDB P0AFR2 444.4 Da LogP -1.16 TPSA 199.6 1 viol. ✓ Clean CC(C)(COP(=O)(O)O)[C@@H](C(=O)NCCC(=O)NCCSC(=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.