Protein target profile

KP13_05435

putative permease

Genome: KpKP13 Gene: AHE44974.1 3D evidence: AlphaFold DB model + ColabFold model UniProt A0A0H3GW71
Length 459
Pocket druggability 0.855
Direct ligand evidence 0 55 total records
Functional annotation 0 EC 4 GO
Target summary

Strong target candidate with converging metabolic, structural and chemical evidence.

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
0.7% 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.

Localization

Localization
CytoplasmicMembrane

Structure confidence

ColabFold pLDDT
91.46 0-100 confidence; >70 supports local structural interpretation.

Binding-site evidence

AlphaFold DB / UniProt model

The selected pocket score is the FPocket value used for ranking after applying the curated structure priority. It estimates small-molecule pocket quality; it is not experimental binding evidence. The 3D viewer may show a different loaded structure, so visible pockets can differ.

FPocket 0.855
Structure A0A0H3GW71
Pocket Pocket 2
P2Rank 0.953
Structure A0A0H3GW71
Pocket Pocket 1
ColabFold model
FPocket 0.75 · Pocket 2
P2Rank 0.941 · Pocket 1
Core conservation Conserved core gene
Roary core
CoreCruncher core
Gut microbiome 31 / 4744 genomes with a hit
Prevalence 0.7%

Cross-references

External database identifiers for this protein, its structures, ligands, and metabolic reactions.

Sequence

Primary amino-acid sequence viewer.

MSERRSIDYIPESERHGHPFSQFTLWFGGNLQITAIVTGALAVVLGGDVVWSLVGLLVGQMLGAAVMSLHALQGPRLGLPQMILSRAQFGVFGAVVPLVLVCVMYIGFSASGTVLAGQAMAKLLNISHVAGMLIFSAIIIVIAVLGYKVIHKLGKLASIVGILAFVYMFITLLLSADLSALAHNNHFSLPTFLLAVSLSSSWQIAFCPYVSDYSRYLPRDVSATKTWCSVFFGTVLGTQTSMTLGVLTAAIAGSAFPGHEVSYLVGLGKSQAMAMVIYFAICFGKITFTTLNAYGSFMSLTTIVSAFRRQTVLSQKCRIAFVVLMVTASCIIALLSEPAFLKHFTHFLLFLLAFFVPWSAICLTDYYLISKGAIDIPALSDPQQRYGFWNLYAITLYIVGVLIQLPFIENPLFHGSLTWIFAGNDVSWIIGWFGTGVLYYALRRFDRRSLPAQSLFPST

Functional annotations

Enzyme classification and Gene Ontology terms linked to this protein.

4 GO

Gene Ontology (GO)

4
  • GO:0016020 A lipid bilayer along with all the proteins and protein complexes embedded in it and attached to it.
  • 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: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.

Sequence domains and features

Domain and signature matches imported from InterPro and related databases.

45 records
Show feature table
Start End DB Term Name
319 341 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
49 69 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
50 72 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
70 88 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
156 178 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.
230 256 Phobius TRANSMEMBRANE 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.
109 127 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
89 108 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
276 298 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
347 368 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
128 149 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
386 408 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
211 229 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
418 440 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
1 22 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
156 175 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
389 407 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
92 114 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
1 454 PIRSF PIRSF002744 Pur-cyt_permease
1 454 InterPro IPR026030 Purine-cytosine permease Fcy2/21/22
369 388 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
276 307 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
347 369 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
44 48 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
187 210 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
230 252 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
408 418 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
129 151 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
419 442 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
176 186 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
3 449 PANTHER PTHR31806 PURINE-CYTOSINE PERMEASE FCY2-RELATED
3 449 InterPro IPR026030 Purine-cytosine permease Fcy2/21/22
443 459 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
308 318 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
319 341 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
23 43 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
3 442 Gene3D G3DSA:1.10.4160.10 Hydantoin permease
11 448 CDD cd11484 SLC-NCS1sbd_CobB-like
9 431 Pfam PF02133 Permease for cytosine/purines, uracil, thiamine, allantoin
9 431 InterPro IPR001248 Purine-cytosine permease
342 346 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
150 155 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
257 275 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.

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 · FPocket

Druggability: high ≥ 0.7 · medium 0.4–0.69 · low < 0.4

Site 1 FPocket #2
0.855
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Surrounding area
Site 2 FPocket #9
0.571
Unusual size
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Surrounding area
Site 3 FPocket #1
0.518
Likely same site as P2Rank 1 6.5 Å 11 shared residues 92% of smaller site
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Surrounding area
Site 4 FPocket #17
0.508
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Surrounding area

Binding pockets · P2Rank

Probability: high ≥ 0.5 · medium 0.2–0.49 · low < 0.2

Site 1 P2Rank #1
0.953
Likely same site as FPocket 1 6.5 Å 11 shared residues 92% of smaller site
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Surrounding area
Site 2 P2Rank #2
0.411
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Surrounding area
Site 3 P2Rank #3
0.276
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Surrounding area
Site 4 P2Rank #4
0.214
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Surrounding area
Site 5 P2Rank #5
0.127
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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_A0A0H3GW71
AlphaFold DB full sequence Viewing
ColabFold KP13_05435
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.

55 records
Chemistry signal

Structural ligand evidence is available for this target.

Direct evidence 0 same-protein records
Transferred evidence 5 records from similar proteins
Structural ligands 5 0 loaded crystals
Measured bioactivity 0 direct and transferred ChEMBL records
Proposed compounds 50 similarity-based ZINC candidates
Best available ligand signal
5FH PDB via homolog 190.2 Da · LogP 0.44 · TPSA 58.2 Open detail RCSB PDB
5ND PDB via homolog Detail RCSB PDB
5NL PDB via homolog Detail RCSB PDB
B5H PDB via homolog Detail RCSB PDB
I5H PDB via homolog Detail RCSB PDB

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
5FH RCSB PDB D6R8X8 190.2 Da LogP 0.44 TPSA 58.2 ✓ Ro5 ✓ Clean c1ccc(cc1)C[C@H]2C(=O)NC(=O)N2
5ND RCSB PDB D6R8X8 240.3 Da LogP 1.59 TPSA 58.2 ✓ Ro5 ✓ Clean c1ccc2cc(ccc2c1)C[C@@H]3C(=O)NC(=O)N3
5NL RCSB PDB D6R8X8 240.3 Da LogP 1.59 TPSA 58.2 ✓ Ro5 ✓ Clean c1ccc2cc(ccc2c1)C[C@H]3C(=O)NC(=O)N3
B5H RCSB PDB D6R8X8 267.1 Da LogP 1.63 TPSA 58.2 ✓ Ro5 ✓ Clean c1cc(cc(c1)Br)/C=C\2/C(=O)NC(=O)N2
I5H RCSB PDB D6R8X8 229.2 Da LogP 0.92 TPSA 74.0 ✓ Ro5 ✓ Clean c1ccc2c(c1)c(c[nH]2)C[C@H]3C(=O)NC(=O)N3

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.