KpATCC43816 Protein target profile

outer membrane protein A

Accession: VK055_1501

Gene: ompA AIK80121.1 3D evidence: Experimental + AlphaFold DB model + ColabFold model Metabolism Not in network UniProt P24017
Length 356
Pocket druggability (P2Rank · AlphaFold DB model) 0.135
Direct ligand evidence 0 55 total records
Functional annotation 0 EC 6 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
2.3% of screened genomes Lower prevalence suggests narrower overlap with the screened gut microbiome.

Essentiality

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

Structure confidence

ColabFold pLDDT
77.52 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) 0.135
Structure P24017
Pocket Pocket 1
Druggability (FPocket) 0.496
Structure P24017
Pocket Pocket 2
ColabFold model
P2Rank 0.724 · Pocket 1
FPocket 0.534 · Pocket 18
Core conservation Conserved core gene
Roary core
CoreCruncher core
Gut microbiome 111 / 4744 genomes with a hit
Prevalence 2.3%

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.

MKKTAIAIAVALAGFATVAQAAPKDNTWYAGGKLGWSQYHDTGFYGNGFQNNNGPTRNDQLGAGAFGGYQVNPYLGFEMGYDWLGRMAYKGSVDNGAFKAQGVQLTAKLGYPITDDLDIYTRLGGMVWRADSKGNYASTGVSRSEHDTGVSPVFAGGVEWAVTRDIATRLEYQWVNNIGDAGTVGTRPDNGMLSLGVSYRFGQEDAAPVVAPAPAPAPEVATKHFTLKSDVLFNFNKATLKPEGQQALDQLYTQLSNMDPKDGSAVVLGYTDRIGSEAYNQQLSEKRAQSVVDYLVAKGIPAGKISARGMGESNPVTGNTCDNVKARAALIDCLAPDRRVEIEVKGYKEVVTQPAA

Functional annotations

Enzyme classification and Gene Ontology terms linked to this protein.

6 GO

Subcellular localization

Localization
OuterMembrane

Gene Ontology (GO)

6
  • GO:0015288 Enables the transfer of substances, sized less than 1000 Da, from one side of a membrane to the other. The transmembrane portions of porins consist exclusively of beta-strands which form a beta-barrel. They are found in the outer membranes of Gram-negative bacteria, mitochondria, plastids and possibly acid-fast Gram-positive bacteria.
  • GO:0016020 A lipid bilayer along with all the proteins and protein complexes embedded in it and attached to it.
  • 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:0046930 A protein complex providing a discrete opening in a membrane that allows the passage of gases and/or liquids.
  • GO:0034220 A process in which a monoatomic ion is transported across a membrane. Monatomic ions (also called simple ions) are ions consisting of exactly one atom.
  • GO:0039722 A process in which a symbiont interferes with, inhibits or disrupts a toll-like receptor signaling pathway in the host organism. The host is defined as the larger of the organisms involved in a symbiotic interaction.

Sequence domains and features

Domain and signature matches imported from InterPro and related databases.

49 records
Show feature table
Start End DB Term Name
12 223 Gene3D G3DSA:2.40.160.20 -
1 21 SignalP_GRAM_NEGATIVE SignalP-noTM SignalP-noTM
1 348 Hamap MF_00842 Outer membrane protein A [ompA].
1 348 InterPro IPR002368 Outer membrane protein, OmpA
12 223 FunFam G3DSA:2.40.160.20:FF:000003 Outer membrane protein A
267 311 ProSitePatterns PS01068 OmpA-like domain.
267 311 InterPro IPR006690 Outer membrane protein, OmpA-like, conserved site
5 16 Phobius SIGNAL_PEPTIDE_H_REGION Hydrophobic region of a signal peptide.
220 348 ProSiteProfiles PS51123 OmpA-like domain profile.
220 348 InterPro IPR006665 OmpA-like domain
23 204 Pfam PF01389 OmpA-like transmembrane domain
23 204 InterPro IPR000498 Outer membrane protein OmpA-like, transmembrane domain
224 346 Gene3D G3DSA:3.30.1330.60 -
224 346 InterPro IPR036737 OmpA-like domain superfamily
1 4 Phobius SIGNAL_PEPTIDE_N_REGION N-terminal region of a signal peptide.
1 21 SignalP_GRAM_POSITIVE SignalP-TM SignalP-TM
265 280 PRINTS PR01021 OMPA domain signature
265 280 InterPro IPR006664 Outer membrane protein, bacterial
233 255 PRINTS PR01021 OMPA domain signature
233 255 InterPro IPR006664 Outer membrane protein, bacterial
280 296 PRINTS PR01021 OMPA domain signature
280 296 InterPro IPR006664 Outer membrane protein, bacterial
224 342 PANTHER PTHR30329 STATOR ELEMENT OF FLAGELLAR MOTOR COMPLEX
22 356 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
223 344 SUPERFAMILY SSF103088 OmpA-like
223 344 InterPro IPR036737 OmpA-like domain superfamily
221 236 PRINTS PR01022 Outer membrane protein A signature
221 236 InterPro IPR002368 Outer membrane protein, OmpA
250 269 PRINTS PR01022 Outer membrane protein A signature
250 269 InterPro IPR002368 Outer membrane protein, OmpA
112 128 PRINTS PR01022 Outer membrane protein A signature
112 128 InterPro IPR002368 Outer membrane protein, OmpA
289 308 PRINTS PR01022 Outer membrane protein A signature
289 308 InterPro IPR002368 Outer membrane protein, OmpA
323 336 PRINTS PR01022 Outer membrane protein A signature
323 336 InterPro IPR002368 Outer membrane protein, OmpA
189 203 PRINTS PR01022 Outer membrane protein A signature
189 203 InterPro IPR002368 Outer membrane protein, OmpA
175 189 PRINTS PR01022 Outer membrane protein A signature
175 189 InterPro IPR002368 Outer membrane protein, OmpA
17 21 Phobius SIGNAL_PEPTIDE_C_REGION C-terminal region of a signal peptide.
211 348 FunFam G3DSA:3.30.1330.60:FF:000004 Outer membrane protein A
22 204 SUPERFAMILY SSF56925 OMPA-like
22 204 InterPro IPR011250 Outer membrane protein/outer membrane enzyme PagP, beta-barrel
230 344 CDD cd07185 OmpA_C-like
230 344 InterPro IPR006665 OmpA-like domain
1 21 Phobius SIGNAL_PEPTIDE Signal peptide region
232 327 Pfam PF00691 OmpA family
232 327 InterPro IPR006665 OmpA-like domain

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
0.136
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
0.772
Show in viewer
Surrounding area
All structural evidence 2 experimental · 2 predicted

Structural evidence

2 + 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
PDB 5NHX
X-ray 1.95 Å A
35.4% 209-334
Viewing
PDB 2K0L
X-ray A Loaded
AlphaFold DB AF_P24017
AlphaFold DB full sequence Loaded
ColabFold VK055_1501
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
5GP PDB via homolog 363.2 Da · LogP -2.57 · TPSA 206.0 Open detail RCSB PDB
7QA PDB via homolog Detail RCSB PDB
API PDB via homolog Detail RCSB PDB
C8E PDB via homolog Detail RCSB PDB
SRT 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
5GP RCSB PDB Q9I4L6 363.2 Da LogP -2.57 TPSA 206.0 1 viol. ✓ Clean c1nc2c(n1[C@H]3[C@@H]([C@@H]([C@H](O3)COP(=O)(O…
7QA RCSB PDB P13794 305.3 Da LogP -1.21 TPSA 179.0 1 viol. ✓ Clean C[C@H](C(=O)O)NC(=O)[C@H](CCC[C@H](C(=O)O)N)NC(…
API RCSB PDB Q6RYW5 190.2 Da LogP -1.02 TPSA 126.6 ✓ Ro5 ✓ Clean C(C[C@H](C(=O)O)N)C[C@@H](C(=O)O)N
C8E RCSB PDB P0A910 306.4 Da LogP 2.41 TPSA 57.2 ✓ Ro5 ✓ Clean CCCCCCCCOCCOCCOCCOCCO
SRT RCSB PDB Q6RYW5 150.1 Da LogP -2.12 TPSA 115.1 ✓ Ro5 ✓ Clean [C@H]([C@H](C(=O)O)O)(C(=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.

Cross-references

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