Protein target profile

KP13_03252

putative transporter protein

Genome: KpKP13 Gene: AHE45631.1 3D evidence: AlphaFold DB model + ColabFold model UniProt A0AAX2NHZ8
Length 437
Pocket druggability 0.914
Direct ligand evidence 0 57 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
No hit
Gut microbiome similarity
0.1% of screened genomes Lower prevalence suggests narrower overlap with the screened gut microbiome.

Essentiality

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

Localization

Localization
CytoplasmicMembrane

Structure confidence

ColabFold pLDDT
90.51 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 0.914
Structure A0AAX2NHZ8
Pocket Pocket 8
P2Rank 0.438
Structure A0AAX2NHZ8
Pocket Pocket 1
ColabFold model
FPocket 0.896 · Pocket 5
P2Rank 0.42 · Pocket 1
Core conservation Accessory gene
Roary accessory
CoreCruncher accessory
Gut microbiome 6 / 4744 genomes with a hit
Prevalence 0.1%

Cross-references

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

Sequence

Primary amino-acid sequence viewer.

MAYGCYFTHFYKDVYMSPAIITLLILVVAIIIFISDRLPMGLVAFMVPMALYFSGVIGVKDIFASIVNENVILIIAMCVLGAAFFKTGLAWQSSKILLKYAKTERSLSVLIFMISGVMSAFVSNSGTVAVLIPIVLGIAGTSQIKPIKLLMPLVFGATIGADISIIGSPGNLIAKNTIETFSKGNLSVPFFEYAKIGIPLMIACALLLFFFGSRLIPDRDGHEQSDVQMDYSHIPEWHKLLTLIVFVLAILGMVATDYVKFLPPIHIIACCAAIVLVLTGVLNQKETFNSFETLTVFMLAFMMPLGAALNSTGAGEMIARAVISVTGNSGVIVIMASLWILTWALTQVMSNTAACTLLCPVGWTIAQSIGADPRAVVIAIFIASSVAVCTPMAIPANSMIIGPGNVKFKDFLKPGLAISFVCFIVSMILLPVFYPFY

Functional annotations

Enzyme classification and Gene Ontology terms linked to this protein.

2 GO

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.

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.
13 35 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
194 216 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
435 437 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
312 316 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
1 13 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
261 282 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
23 434 CDD cd01115 SLC13_permease
256 260 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
261 283 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
375 394 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
395 414 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
415 434 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
237 255 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
71 93 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
30 254 Pfam PF03600 Citrate transporter
30 254 InterPro IPR004680 Citrate transporter-like domain
370 374 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
40 59 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
14 34 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
348 369 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
290 309 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
19 228 PANTHER PTHR43652 BASIC AMINO ACID ANTIPORTER YFCC-RELATED
342 347 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
150 173 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
375 394 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
108 139 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
60 70 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
283 293 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
237 256 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
111 138 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
92 110 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
294 311 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
317 341 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
152 174 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
139 149 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
193 216 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
267 430 Pfam PF03600 Citrate transporter
267 430 InterPro IPR004680 Citrate transporter-like domain
71 91 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
40 59 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
174 192 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
217 236 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
35 39 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
414 436 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 · FPocket

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

Site 1 FPocket #8
0.914
Likely same site as P2Rank 4 1.8 Å 10 shared residues 91% of smaller site
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Surrounding area
Site 2 FPocket #3
0.846
Likely same site as P2Rank 3 5.3 Å 9 shared residues 75% of smaller site
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Surrounding area
Site 3 FPocket #9
0.41
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Surrounding area
Site 4 FPocket #25
0.349
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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
0.438
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Surrounding area
Site 2 P2Rank #2
0.365
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Surrounding area
Site 3 P2Rank #3
0.297
Likely same site as FPocket 3 5.3 Å 9 shared residues 75% of smaller site
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Surrounding area
Site 4 P2Rank #4
0.135
Likely same site as FPocket 8 1.8 Å 10 shared residues 91% of smaller site
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Surrounding area
Site 5 P2Rank #5
0.088
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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_A0AAX2NHZ8
AlphaFold DB full sequence Viewing
ColabFold KP13_03252
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.

57 records
Chemistry signal

Structural and bioactivity evidence are both available for this target.

Direct evidence 0 same-protein records
Transferred evidence 7 records from similar proteins
Structural ligands 6 0 loaded crystals
Measured bioactivity 1 direct and transferred ChEMBL records
Proposed compounds 50 similarity-based ZINC candidates
Best available ligand signal
FUM PDB via homolog 116.1 Da · LogP -0.29 · TPSA 74.6 Open detail RCSB PDB
HEX PDB via homolog Detail RCSB PDB
LMR PDB via homolog Detail RCSB PDB
OCT PDB via homolog Detail RCSB PDB
SIN 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
FUM RCSB PDB Q9KNE0 116.1 Da LogP -0.29 TPSA 74.6 ✓ Ro5 ✓ Clean C(=C/C(=O)O)\C(=O)O
HEX RCSB PDB Q9KNE0 86.2 Da LogP 2.59 TPSA 0.0 ✓ Ro5 ✓ Clean CCCCCC
LMR RCSB PDB Q9KNE0 134.1 Da LogP -1.09 TPSA 94.8 ✓ Ro5 ✓ Clean C([C@@H](C(=O)O)O)C(=O)O
OCT RCSB PDB Q9KNE0 114.2 Da LogP 3.37 TPSA 0.0 ✓ Ro5 ✓ Clean CCCCCCCC
SIN RCSB PDB Q9KNE0 118.1 Da LogP -0.06 TPSA 74.6 ✓ Ro5 ✓ Clean C(CC(=O)O)C(=O)O
UB7 RCSB PDB Q9KNE0 166.1 Da LogP 1.08 TPSA 74.6 ✓ Ro5 ✓ Clean c1cc(ccc1C(=O)O)C(=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.