KpATCC43816 Protein target profile

acrB/AcrD/AcrF family protein

Accession: VK055_1744

Gene: AIK80364.1 3D evidence: AlphaFold DB model + ColabFold model Metabolism Not in network UniProt A0A0C7KHD5
Length 1021
Pocket druggability (P2Rank · AlphaFold DB model) 0.913
Direct ligand evidence 0 60 total records
Functional annotation 0 EC 5 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
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 (%)
25.0 Higher values support similarity to known essential genes.

Structure confidence

ColabFold pLDDT
89.35 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) 0.913
Structure A0A0C7KHD5
Pocket Pocket 1
Druggability (FPocket) 0.269
Structure A0A0C7KHD5
Pocket Pocket 68
ColabFold model
P2Rank 0.682 · Pocket 1
FPocket 0.8 · Pocket 54
Core conservation Accessory gene
Roary accessory
CoreCruncher accessory
Gut microbiome 35 / 4744 genomes with a hit
Prevalence 0.7%

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.

MDISRQFINNPTRVWLAILLLGVGGLFALLNIGRLEDPAFTIKTAVIVTHYPGASAQQVEEEVTLPLENAIQQLPSLDNVSSISSNGLSQITVNIASQYHSSELPQIWDELRRRVGDASRLFPPGVVPPFVNDDFGDVFGFFFAISGDSFTNPELVRYAEQLRRELVLVPGVGKVAIGGVIPQQINVDISLAKMAARGITLNQLAAILARLNVVSSAGEIRVGSESIRLHPTGEFQSIDELGDLLVSPHGASATTRLRDIATLSRGLTDSPASIYHANGRQAVTMGVSFIPGVNVIDVGHALEARLQQMAADKPAGIDIAIFYDQAAEVAHSVNGFITNFLMALAIVVGVLLVFMGVRSGIIIALSLALNVLGTLLIMYIWGIELQRISLGALIIALSMLVDNAIVIVEGVLIARQQGSPLLGAINYVIRRSALPLLGATIIAILAFAPIGLSQDSTGEYCKSLFQVLLISLMLSWFSALTITPVLIKWWLFKNAPSAAAAEEKADPYRGSFYRGYQQALRILLQQKTLTLVLMGALLAGAIWGFTFVRQNFFPSSNTPIFFVDLWLPYGTDINATEKMTRDIERSIAGQPGVVTTVSTIGQGSMRFILTYSGQRQYSNYAQIMVRMDDQRGIAPVTRHVEDWIARNYPQVNASTKRIMFGPSGDSAIEVRIKGPDPDTLRALASQVGDILAADPATDSVRNDWQNRSKVIRPQYSPALGRELGVDKQDIDNALEMNFSGSRAGLYREGADLLPVIVRPPEAERQDANHLNNVLVWSQSRQQYIPLSNVINGFALEWEDPLILRRDRTRVLTVQTDPSPLSGQTSGDILARVKPRIDALPLPHGYRIEWGGDAENSSEAQQGLFTTLPLGYLVMFIITVLMFSSLKNAVAIWLTVPLALIGVTPGFLLTGIPFGFMALIGLLSLSGMLIRNGIVLVEEIEQQKQEKDQRQAIIDAATSRLRPILLTAFTTVLGLAPLLRDVFFQSMAVVIMFGLAFATVLTLLVLPVIYACFHHRDMTPQR

Functional annotations

Enzyme classification and Gene Ontology terms linked to this protein.

5 GO

Subcellular localization

Localization
CytoplasmicMembrane

Gene Ontology (GO)

5
  • 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: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.
  • GO:0005886 The membrane surrounding a cell that separates the cell from its external environment. It consists of a phospholipid bilayer and associated proteins.
  • GO:0042910 Enables the directed movement of a xenobiotic from one side of a membrane to the other. A xenobiotic is a compound foreign to the organism exposed to it. It may be synthesized by another organism (like ampicilin) or it can be a synthetic chemical.

Sequence domains and features

Domain and signature matches imported from InterPro and related databases.

73 records
Show feature table
Start End DB Term Name
1 1015 PANTHER PTHR32063 -
1 1015 InterPro IPR001036 Acriflavin resistance protein
559 629 SUPERFAMILY SSF82693 Multidrug efflux transporter AcrB pore domain; PN1, PN2, PC1 and PC2 subdomains
529 548 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
796 1015 SUPERFAMILY SSF82866 Multidrug efflux transporter AcrB transmembrane domain
292 490 SUPERFAMILY SSF82866 Multidrug efflux transporter AcrB transmembrane domain
10 502 Gene3D G3DSA:1.20.1640.10 Multidrug efflux transporter AcrB transmembrane domain
13 35 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
503 1009 Gene3D G3DSA:1.20.1640.10 Multidrug efflux transporter AcrB transmembrane domain
136 325 SUPERFAMILY SSF82693 Multidrug efflux transporter AcrB pore domain; PN1, PN2, PC1 and PC2 subdomains
955 977 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
987 1009 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
1013 1021 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
453 463 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
184 266 SUPERFAMILY SSF82714 Multidrug efflux transporter AcrB TolC docking domain; DN and DC subdomains
184 266 InterPro IPR027463 Multidrug efflux transporter AcrB TolC docking domain, DN/DC subdomains
413 432 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
433 452 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
388 412 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
940 959 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
528 548 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
12 33 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
465 487 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
913 939 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
10 34 PRINTS PR00702 Acriflavin resistance protein family signature
10 34 InterPro IPR001036 Acriflavin resistance protein
439 462 PRINTS PR00702 Acriflavin resistance protein family signature
439 462 InterPro IPR001036 Acriflavin resistance protein
464 487 PRINTS PR00702 Acriflavin resistance protein family signature
464 487 InterPro IPR001036 Acriflavin resistance protein
358 379 PRINTS PR00702 Acriflavin resistance protein family signature
358 379 InterPro IPR001036 Acriflavin resistance protein
38 56 PRINTS PR00702 Acriflavin resistance protein family signature
38 56 InterPro IPR001036 Acriflavin resistance protein
386 410 PRINTS PR00702 Acriflavin resistance protein family signature
386 410 InterPro IPR001036 Acriflavin resistance protein
464 487 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
889 911 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
915 934 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
715 790 SUPERFAMILY SSF82714 Multidrug efflux transporter AcrB TolC docking domain; DN and DC subdomains
715 790 InterPro IPR027463 Multidrug efflux transporter AcrB TolC docking domain, DN/DC subdomains
862 882 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
549 861 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
561 663 Gene3D G3DSA:3.30.70.1430 Multidrug efflux transporter AcrB pore domain
336 354 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
136 327 Gene3D G3DSA:3.30.70.1320 Multidrug efflux transporter AcrB pore domain like
361 382 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
979 989 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
4 1013 Pfam PF00873 AcrB/AcrD/AcrF family
4 1013 InterPro IPR001036 Acriflavin resistance protein
355 360 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
361 383 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
908 912 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
889 907 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
711 801 Gene3D G3DSA:3.30.2090.10 Multidrug efflux transporter AcrB TolC docking domain; DN and DC subdomains
711 801 InterPro IPR027463 Multidrug efflux transporter AcrB TolC docking domain, DN/DC subdomains
40 135 SUPERFAMILY SSF82693 Multidrug efflux transporter AcrB pore domain; PN1, PN2, PC1 and PC2 subdomains
863 882 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
332 354 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
488 527 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
664 863 Gene3D G3DSA:3.30.70.1440 Multidrug efflux transporter AcrB pore domain
40 809 Gene3D G3DSA:3.30.70.1430 Multidrug efflux transporter AcrB pore domain
34 335 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
180 274 Gene3D G3DSA:3.30.2090.10 Multidrug efflux transporter AcrB TolC docking domain; DN and DC subdomains
180 274 InterPro IPR027463 Multidrug efflux transporter AcrB TolC docking domain, DN/DC subdomains
383 387 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
883 888 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
428 450 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
939 959 Coils Coil Coil
990 1012 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
1 11 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
393 415 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
960 978 Phobius TRANSMEMBRANE 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 · P2Rank

Druggability (P2Rank): high ≥ 0.5 · medium 0.2–0.49 · low < 0.2

Pocket 1 P2Rank #1
0.913
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Surrounding area
Pocket 2 P2Rank #2
0.744
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Surrounding area
Pocket 3 P2Rank #3
0.684
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Surrounding area
Pocket 4 P2Rank #4
0.434
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Surrounding area
Pocket 5 P2Rank #5
0.397
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Surrounding area

Binding pockets · FPocket

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

Pocket 1 FPocket #68
0.269
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_A0A0C7KHD5
AlphaFold DB full sequence Viewing
ColabFold VK055_1744
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.

60 records
Chemistry signal

Structural ligand evidence is available for this target.

Direct evidence 0 same-protein records
Transferred evidence 10 records from similar proteins
Structural ligands 10 0 loaded crystals
Measured bioactivity 0 direct and transferred ChEMBL records
Proposed compounds 50 similarity-based ZINC candidates
Best available ligand signal
3PE PDB via homolog 748.1 Da · LogP 12.06 · TPSA 134.4 Open detail RCSB PDB
AIX PDB via homolog Detail RCSB PDB
AV0 PDB via homolog Detail RCSB PDB
ERY PDB via homolog Detail RCSB PDB
ET 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
3PE RCSB PDB Q2FD94 748.1 Da LogP 12.06 TPSA 134.4 2 viol. ✓ Clean CCCCCCCCCCCCCCCCCC(=O)OC[C@H](COP(=O)(O)OCCN)OC…
AIX RCSB PDB Q5F725 351.4 Da LogP 0.26 TPSA 121.5 ✓ Ro5 ✓ Clean CC1([C@@H](N[C@H](S1)[C@@H](C=O)NC(=O)[C@@H](c2…
AV0 RCSB PDB P52002 1005.2 Da LogP -1.68 TPSA 357.1 3 viol. ✓ Clean CCCCCCCCCCC(CCCCCCCCCC)(CO[C@H]1[C@@H]([C@H]([C…
ERY RCSB PDB Q5F725 733.9 Da LogP 1.79 TPSA 193.9 2 viol. ✓ Clean CC[C@@H]1[C@@]([C@@H]([C@H](C(=O)[C@@H](C[C@@](…
ET RCSB PDB Q2FD70 314.4 Da LogP 4.13 TPSA 55.9 ✓ Ro5 Alert CC[n+]1c2cc(ccc2c3ccc(cc3c1c4ccccc4)N)N
LMT RCSB PDB P52002 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…
LMU RCSB PDB Q9I6X4 510.6 Da LogP -0.45 TPSA 178.5 3 viol. ✓ Clean CCCCCCCCCCCCO[C@@H]1[C@@H]([C@H]([C@@H]([C@H](O…
P9D RCSB PDB P52002 693.8 Da LogP 0.91 TPSA 212.5 2 viol. ✓ Clean CC(C)(C)c1csc(n1)NC(=O)C2=CC3=NC(=C(C(=O)N3C=C2…
PTY RCSB PDB Q2FD70 734.1 Da LogP 11.67 TPSA 134.4 2 viol. ✓ Clean CCCCCCCCCCCCCCCCCCCC(=O)O[C@H](COC(=O)CCCCCCCCC…
YQM RCSB PDB Q2FD94 558.6 Da LogP 0.14 TPSA 193.7 2 viol. ✓ Clean CN(C)[C@H]1[C@@H]2C[C@@H]3Cc4c(cc(c(c4C(=C3C(=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.