KpATCC43816 Protein target profile

blc outer membrane lipoprotein

Accession: VK055_2710

Gene: blc AIK81300.1 3D evidence: AlphaFold DB model + ColabFold model Metabolism Not in network UniProt A0A0H3GMN4
Length 177
Pocket druggability (P2Rank · AlphaFold DB model) 0.883
Direct ligand evidence 0 55 total records
Functional annotation 0 EC 3 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 (%)
32.061 Lower values reduce human off-target concern.
Human E-value
5.07e-07
Gut microbiome similarity
2.6% of screened genomes Lower prevalence suggests narrower overlap with the screened gut microbiome.

Essentiality

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

Structure confidence

ColabFold pLDDT
90.52 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) 0.883
Structure A0A0H3GMN4
Pocket Pocket 1
Druggability (FPocket) 0.81
Structure A0A0H3GMN4
Pocket Pocket 3
ColabFold model
P2Rank 0.895 · Pocket 1
FPocket 0.764 · Pocket 4
Core conservation Conserved core gene
Roary core
CoreCruncher core
Gut microbiome 123 / 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.

MKLWPVVTGVAIALTLVACKSPTPPKGVQPISGFDASRYLGKWYEVARLENRFERGLEQVTATYGARSDGGISVVNRGYDPVKKRWNESDGKAYFTGAPTTAALKVSFFGPFYGGYNVIRLDDDYQYALVSGPNRDYLWILSRTPTIPAAVKQDYLNTARELGFDVDRLVWIRQTPR

Functional annotations

Enzyme classification and Gene Ontology terms linked to this protein.

3 GO

Subcellular localization

Localization
OuterMembrane

Gene Ontology (GO)

3
  • GO:0009279 A lipid bilayer that forms the outermost membrane of the cell envelope; enriched in polysaccharide and protein; the outer leaflet of the membrane contains specific lipopolysaccharide structures.
  • GO:0008289 Binding to a lipid.
  • GO:0006950 Any process that results in a change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a disturbance in organismal or cellular homeostasis, usually, but not necessarily, exogenous (e.g. temperature, humidity, ionizing radiation).

Sequence domains and features

Domain and signature matches imported from InterPro and related databases.

35 records
Show feature table
Start End DB Term Name
51 67 PRINTS PR01171 Bacterial lipocalin signature
51 67 InterPro IPR002446 Lipocalin, bacterial
70 79 PRINTS PR01171 Bacterial lipocalin signature
70 79 InterPro IPR002446 Lipocalin, bacterial
104 118 PRINTS PR01171 Bacterial lipocalin signature
104 118 InterPro IPR002446 Lipocalin, bacterial
163 173 PRINTS PR01171 Bacterial lipocalin signature
163 173 InterPro IPR002446 Lipocalin, bacterial
136 147 PRINTS PR01171 Bacterial lipocalin signature
136 147 InterPro IPR002446 Lipocalin, bacterial
121 129 PRINTS PR01171 Bacterial lipocalin signature
121 129 InterPro IPR002446 Lipocalin, bacterial
34 48 PRINTS PR01171 Bacterial lipocalin signature
34 48 InterPro IPR002446 Lipocalin, bacterial
1 19 ProSiteProfiles PS51257 Prokaryotic membrane lipoprotein lipid attachment site profile.
1 2 Phobius SIGNAL_PEPTIDE_N_REGION N-terminal region of a signal peptide.
15 19 Phobius SIGNAL_PEPTIDE_C_REGION C-terminal region of a signal peptide.
20 177 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
8 175 Gene3D G3DSA:2.40.128.20 -
8 175 InterPro IPR012674 Calycin
33 46 ProSitePatterns PS00213 Lipocalin signature.
33 46 InterPro IPR022272 Lipocalin family conserved site
1 19 Phobius SIGNAL_PEPTIDE Signal peptide region
8 175 PANTHER PTHR10612 APOLIPOPROTEIN D
12 176 SUPERFAMILY SSF50814 Lipocalins
12 176 InterPro IPR012674 Calycin
2 177 PIRSF PIRSF036893 Lipocalin_ApoD
2 177 InterPro IPR022271 Lipocalin, ApoD type
10 177 FunFam G3DSA:2.40.128.20:FF:000002 Outer membrane lipoprotein Blc
35 174 Pfam PF08212 Lipocalin-like domain
35 174 InterPro IPR000566 Lipocalin/cytosolic fatty-acid binding domain
3 14 Phobius SIGNAL_PEPTIDE_H_REGION Hydrophobic region of a signal peptide.
1 19 SignalP_EUK SignalP-noTM SignalP-noTM
31 171 CDD cd19438 lipocalin_Blc-like
31 171 InterPro IPR047202 Lipocalin Blc-like

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.

Download VMD script Full viewer

Loading 3D structure...

Drag to rotate — click the view, then scroll to zoom.

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
0.883
Likely same site as FPocket 3 3.0 Å 18 shared residues 90% of smaller site
Show in viewer
Surrounding area
Pocket 2 P2Rank #2
0.036
Likely same site as FPocket 3 2.3 Å 6 shared residues 100% of smaller site
Show in viewer
Surrounding area

Binding pockets · FPocket

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

Pocket 1 FPocket #3
0.81 Unusual size
Likely same site as P2Rank 2 2.3 Å 6 shared residues 100% 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_A0A0H3GMN4
AlphaFold DB full sequence Viewing
ColabFold VK055_2710
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
BLA PDB via homolog 582.7 Da · LogP 4.81 · TPSA 160.9 Open detail RCSB PDB
LMT PDB via homolog Detail RCSB PDB
P4K PDB via homolog Detail RCSB PDB
Q3J PDB via homolog Detail RCSB PDB
VCA 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
BLA RCSB PDB A0A1D5B367 582.7 Da LogP 4.81 TPSA 160.9 1 viol. ✓ Clean Cc1c(c([nH]c1\C=C/2\C(=C(C(=O)N2)C=C)C)\C=C/3\C…
LMT RCSB PDB P0A901 510.6 Da LogP -0.45 TPSA 178.5 3 viol. ✓ Clean CCCCCCCCCCCCO[C@H]1[C@@H]([C@H]([C@@H]([C@H](O1…
P4K RCSB PDB P0A901 662.8 Da LogP 0.23 TPSA 149.5 2 viol. ✓ Clean CCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCO
Q3J RCSB PDB P0A901 319.2 Da LogP 1.88 TPSA 26.6 ✓ Ro5 Alert [B-]1(c2cc(ccc2C=C3[N+]1=C(N(C3=O)C)C)N(CC)CC)(…
VCA RCSB PDB P0A901 282.5 Da LogP 6.11 TPSA 37.3 1 viol. ✓ Clean CCCCCCC=CCCCCCCCCCC(=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.

Cross-references

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