Protein target profile

VK055_1200

major Facilitator Superfamily protein

Genome: KpATCC43816 Gene: AIK79823.1 3D evidence: AlphaFold DB model + ColabFold model UniProt A0A0H3GW31
Length 436
Pocket druggability 0.999
Direct ligand evidence 0 81 total records
Functional annotation 0 EC 3 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 (%)
22.022 Lower values reduce human off-target concern.
Human E-value
5.39e-16
Gut microbiome similarity
0.4% of screened genomes Lower prevalence suggests narrower overlap with the screened gut microbiome.

Essentiality

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

Localization

Localization
CytoplasmicMembrane

Structure confidence

ColabFold pLDDT
90.34 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 0.999
Structure A0A0H3GW31
Pocket Pocket 25
P2Rank 0.97
Structure A0A0H3GW31
Pocket Pocket 1
ColabFold model
FPocket 0.982 · Pocket 23
P2Rank 0.708 · Pocket 1
Core conservation Accessory gene
Roary accessory
CoreCruncher accessory
Gut microbiome 21 / 4744 genomes with a hit
Prevalence 0.4%

Cross-references

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

Sequence

Primary amino-acid sequence viewer.

MKNDLEKKVMRKVTLRIIPFIMLLYFIAFLDRVNIGFAALTMNQDLGFSPTVFGLGAGIFFLGYFLFEVPSNLILHKVGARIWIARVMITWGFVSGCMAFVQGTTSFYILRFLLGVAEAGFFPGIILYLSYWFPAARRAQVTAIFMAAAPLSTALGSPVSAALLEMHGFLGYAGWQWMFVLEALPALVLGVVVLFFLTDRPAKAKWLTDQERAWLENAMQDEERARAAKQSHSSAWRGLADIRVLALALVYFGTSAGLYTLGIWSPQIIRSFGASSLEIGFLNAFPAVIGVIAMILWARHSDRTKERSWHVIGACLLAAAGLIYAGNVSTLFTVMVALTLVTVGISASKPPLWSMPTLFLSGPAAAAGIAAINSIGNLGGFVGPMMIGVIREQTGSYSWGLYFVAGLLALSALVVMILSARANKSPTAELPHPHTH

Functional annotations

Enzyme classification and Gene Ontology terms linked to this protein.

3 GO

Gene Ontology (GO)

3
  • 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:0016020 A lipid bilayer along with all the proteins and protein complexes embedded in it and attached to it.

Sequence domains and features

Domain and signature matches imported from InterPro and related databases.

50 records
Show feature table
Start End DB Term Name
68 78 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
7 212 FunFam G3DSA:1.20.1250.20:FF:000018 MFS transporter permease
4 425 PANTHER PTHR43791 PERMEASE-RELATED
237 423 FunFam G3DSA:1.20.1250.20:FF:000126 MFS transporter permease
198 243 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
109 131 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
164 174 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
360 382 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.
14 418 CDD cd17319 MFS_ExuT_GudP_like
353 363 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
311 345 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
277 297 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
279 298 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
130 140 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
332 352 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
5 419 SUPERFAMILY SSF103473 MFS general substrate transporter
5 419 InterPro IPR036259 MFS transporter superfamily
82 104 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
244 265 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
143 165 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
175 197 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
46 67 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
266 276 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
242 264 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
107 129 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
20 40 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
309 326 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
1 19 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
399 418 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
298 308 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
6 211 Gene3D G3DSA:1.20.1250.20 MFS general substrate transporter like domains
6 211 InterPro IPR036259 MFS transporter superfamily
395 417 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
141 163 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
239 427 Gene3D G3DSA:1.20.1250.20 MFS general substrate transporter like domains
239 427 InterPro IPR036259 MFS transporter superfamily
17 423 ProSiteProfiles PS50850 Major facilitator superfamily (MFS) profile.
17 423 InterPro IPR020846 Major facilitator superfamily domain
41 45 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
388 398 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
419 436 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
327 331 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
364 387 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
102 106 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
175 197 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
50 69 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
79 101 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
21 384 Pfam PF07690 Major Facilitator Superfamily
21 384 InterPro IPR011701 Major facilitator superfamily

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 #25
0.999
Likely same site as P2Rank 1 3.4 Å 37 shared residues 95% of smaller site
Unusual size
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Surrounding area
Site 2 FPocket #22
0.25
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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
0.97
Likely same site as FPocket 25 3.4 Å 37 shared residues 95% of smaller site
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Surrounding area
Site 2 P2Rank #2
0.248
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Surrounding area
Site 3 P2Rank #3
0.103
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Surrounding area
Site 4 P2Rank #4
0.061
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Surrounding area
Site 5 P2Rank #5
0.042
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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_A0A0H3GW31
AlphaFold DB full sequence Viewing
ColabFold VK055_1200
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.

81 records
Chemistry signal

Structural and bioactivity evidence are both available for this target.

Direct evidence 0 same-protein records
Transferred evidence 31 records from similar proteins
Structural ligands 1 0 loaded crystals
Measured bioactivity 30 direct and transferred ChEMBL records
Proposed compounds 50 similarity-based ZINC candidates
Best available ligand signal
J0M PDB via homolog 196.2 Da · LogP -3.49 · TPSA 138.5 Open detail RCSB PDB
CHEMBL1200712 ChEMBL via homolog · pchembl 7.40 (~39.8 nM) Detail ChEMBL
Y0X ChEMBL via homolog · pchembl 6.72 (~190.5 nM) Detail ChEMBL
CHEMBL149394 ChEMBL via homolog Detail ChEMBL
CHEMBL1590868 ChEMBL via homolog 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
J0M RCSB PDB J7QAK3 196.2 Da LogP -3.49 TPSA 138.5 1 viol. ✓ Clean C([C@H]([C@@H]([C@@H]([C@H](C(=O)O)O)O)O)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.