KpKP13 Protein target profile

Potassium efflux system KefA

Accession: KP13_03627

Gene: AHE45969.1 kefA 3D evidence: AlphaFold DB model + ColabFold model UniProt A0A0H3GSW4
Length 1115
Pocket druggability (P2Rank · AlphaFold DB model) 0.968
Direct ligand evidence 0 59 total records
Functional annotation 0 EC 5 GO
Target summary

Strong target candidate with converging metabolic, structural and chemical evidence.

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
1.9% of screened genomes Lower prevalence suggests narrower overlap with the screened gut microbiome.

Essentiality

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

Structure confidence

ColabFold pLDDT
84.81 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) 0.968
Structure A0A0H3GSW4
Pocket Pocket 1
Druggability (FPocket) 0.891
Structure A0A0H3GSW4
Pocket Pocket 109
ColabFold model
P2Rank 0.97 · Pocket 1
FPocket 0.943 · Pocket 28
Core conservation Conserved core gene
Roary core
CoreCruncher core
Gut microbiome 88 / 4744 genomes with a hit
Prevalence 1.9%

Cross-references

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

Sequence

Primary amino-acid sequence viewer.

MLHTISRQRATFIFIITLLCFIGLFSPVQGRAADLPDRAEVQSQLNTLNKQKELTPQDKLVQQDLTQTLETLDKIERIKSETAQLRQQVEQAPAKLRQAVESLNNLSDVPNDDATRKTLSTLSLRQLESRVTQTLDDLQNAQNDLATYNSQLVSLQTQPERVQNAMFNASQQLQQIRNRLNGTSVGDETLRPTQQVLLQAQQALLNAQIEQQRKSLEGNTILQDTLQKQRDYVTAWSNRLEHQLQLLQEAVNSKRLTLTEKTAQEAVTPDETARIQANPLVKQELDINHQLSEKLIQATENGNQLVQRNIQVKNWLDRALQSERDIKEQISVLRGSLLLSRILYQQQQTLPSADELQDMTNRIADLRLEQFEVNQQRDALFQSDAFVAKLEEGHSSEVNDEVHAALLEVIDMRRELLDQFNKQLGNQLMMAINLQINQQQLMSVSSSLKEILTQQIFWVNSNKPMDWEWIKAFPEALKGQFKAMKISVNWEKAWPAVFVAFLAGLPLLLIAGLIRWRLQWLKDYQAKLASQVGQLRNDTQLHTPKAILIDLIRALPVVLLILAIGLILLTMQLNISGLLWAYSKKLAMFWLVFGLCWKVLEKNGVAVNHFNMPAQLTSHWRRQIVRVSLALLPLNFWSVISELSPLNLMDDVLGQLVIFFNLLLIAVLVWPMCRESWRDKESHSLRLLTITVLSIVPVALMVLTATGYFYTTLRLAGRWIETVYLVMIWNLLYQTVLRGLSVAARRIAWRRALARRQHLVKEGAEGAEPQEEPTIALEQVNQQTLRITMLVMVALFAVMFWAIWSDLITVFAYLDSITLWHYNGTEAGASVVRSVTMGSLLFAIVASMVAWALIRNLPGLLEVLVLSRLNMRQGTSYAITTILNYAIIAIGAMTVFGALGVSWDKLQWLAAALSVGLGFGLQEIFGNFVSGLIILFERPVRIGDTVTIGTFSGTVSKIRIRATTITDFDRKEVIIPNKAFVTERLINWSLSDTVTRVVIRLGVAYGSDLDKVKEVLLKAAHDHPKVMQEPAPAVFFTTFGASTLDHELRLYVRELRDRSYTVDELNRAIDRLCRENDINIAFNQLEVHLRNEKGDEVTEVKRDGKGDDLAPTTAS

Functional annotations

Enzyme classification and Gene Ontology terms linked to this protein.

5 GO

Subcellular localization

Localization
CytoplasmicMembrane

Gene Ontology (GO)

5
  • 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:0008381 Enables the transmembrane transfer of an monoatomic ion by a channel that opens in response to a mechanical stress.
  • GO:0009992 A homeostatic process involved in the maintenance of a steady state level of water within a cell.

Sequence domains and features

Domain and signature matches imported from InterPro and related databases.

64 records
Show feature table
Start End DB Term Name
789 814 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
493 514 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
641 651 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
881 1080 Pfam PF00924 Mechanosensitive ion channel
881 1080 InterPro IPR006685 Mechanosensitive ion channel MscS
924 989 SUPERFAMILY SSF50182 Sm-like ribonucleoproteins
924 989 InterPro IPR010920 LSM domain superfamily
939 988 Gene3D G3DSA:2.30.30.60 -
939 988 InterPro IPR023408 Mechanosensitive ion channel MscS, beta-domain superfamily
790 812 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
33 492 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
711 721 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
503 820 Pfam PF12794 Mechanosensitive ion channel inner membrane domain 1
503 820 InterPro IPR025692 Mechanosensitive ion channel inner membrane domain 1
578 600 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
834 854 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
12 29 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
720 742 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
953 987 ProSitePatterns PS01246 Uncharacterized protein family UPF0003 signature.
953 987 InterPro IPR006686 Mechanosensitive ion channel MscS, conserved site
26 32 Phobius SIGNAL_PEPTIDE_C_REGION C-terminal region of a signal peptide.
601 619 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
832 854 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
875 896 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
620 640 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
624 641 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
1 32 SignalP_GRAM_POSITIVE SignalP-TM SignalP-TM
839 922 SUPERFAMILY SSF82861 Mechanosensitive channel protein MscS (YggB), transmembrane region
839 922 InterPro IPR011014 Mechanosensitive ion channel MscS, transmembrane-2
574 578 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
991 1091 SUPERFAMILY SSF82689 Mechanosensitive channel protein MscS (YggB), C-terminal domain
991 1091 InterPro IPR011066 Mechanosensitive ion channel MscS, C-terminal
515 550 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
674 684 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
908 936 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
939 987 FunFam G3DSA:2.30.30.60:FF:000001 MscS Mechanosensitive ion channel
1 9 Phobius SIGNAL_PEPTIDE_N_REGION N-terminal region of a signal peptide.
551 573 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
815 833 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
44 283 Pfam PF12795 Mechanosensitive ion channel porin domain
44 283 InterPro IPR024393 Mechanosensitive ion channel MscS, porin domain
651 670 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
881 903 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
913 935 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
551 573 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
937 1115 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
685 710 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
855 874 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
683 705 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
991 1085 FunFam G3DSA:3.30.70.100:FF:000015 Potassium efflux system KefA
652 673 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
837 938 FunFam G3DSA:1.10.287.1260:FF:000002 Potassium efflux system KefA
992 1085 Gene3D G3DSA:3.30.70.100 -
124 158 Coils Coil Coil
722 741 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
561 1105 PANTHER PTHR30347 POTASSIUM CHANNEL RELATED
579 600 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
494 516 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
837 938 Gene3D G3DSA:1.10.287.1260 -
10 25 Phobius SIGNAL_PEPTIDE_H_REGION Hydrophobic region of a signal peptide.
742 788 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
897 907 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
1 30 SignalP_EUK SignalP-noTM SignalP-noTM
1 32 Phobius SIGNAL_PEPTIDE Signal peptide region

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
0.968
Likely same site as FPocket 109 6.4 Å 23 shared residues 79% of smaller site
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Surrounding area
Pocket 2 P2Rank #2
0.58
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Surrounding area
Pocket 3 P2Rank #3
0.4
Likely same site as FPocket 109 5.2 Å 12 shared residues 100% of smaller site
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Surrounding area
Pocket 4 P2Rank #4
0.201
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Surrounding area
Pocket 5 P2Rank #5
0.188
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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 #109
0.891 Unusual size
Likely same site as P2Rank 3 5.2 Å 12 shared residues 100% of smaller site
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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_A0A0H3GSW4
AlphaFold DB full sequence Viewing
ColabFold KP13_03627
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.

59 records
Chemistry signal

Structural ligand evidence is available for this target.

Direct evidence 0 same-protein records
Transferred evidence 9 records from similar proteins
Structural ligands 9 0 loaded crystals
Measured bioactivity 0 direct and transferred ChEMBL records
Proposed compounds 50 similarity-based ZINC candidates
Best available ligand signal
D12 PDB via homolog 170.3 Da · LogP 4.93 · TPSA 0.0 Open detail RCSB PDB
HEX PDB via homolog Detail RCSB PDB
LFA PDB via homolog Detail RCSB PDB
LMT PDB via homolog Detail RCSB PDB
PCW 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
D12 RCSB PDB Q8VZL4 170.3 Da LogP 4.93 TPSA 0.0 ✓ Ro5 ✓ Clean CCCCCCCCCCCC
HEX RCSB PDB P0C0S1 86.2 Da LogP 2.59 TPSA 0.0 ✓ Ro5 ✓ Clean CCCCCC
LFA RCSB PDB Q8VZL4 282.6 Da LogP 8.05 TPSA 0.0 1 viol. ✓ Clean CCCCCCCCCCCCCCCCCCCC
LMT RCSB PDB P0C0S1 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…
PCW RCSB PDB P0C0S1 787.1 Da LogP 12.36 TPSA 108.4 2 viol. ✓ Clean CCCCCCCC\C=C/CCCCCCCC(=O)OC[C@H](CO[P@@](=O)(O)…
PEE RCSB PDB P0AEB5 744.0 Da LogP 11.61 TPSA 134.4 2 viol. ✓ Clean CCCCCCCC/C=C\CCCCCCCC(=O)OC[C@H](COP(=O)(O)OCCN…
POV RCSB PDB P0C0S1 760.1 Da LogP 11.17 TPSA 111.2 2 viol. ✓ Clean CCCCCCCCCCCCCCCC(=O)OC[C@@H](CO[P@](=O)([O-])OC…
QGD RCSB PDB P0AEB5 750.1 Da LogP 11.20 TPSA 154.6 2 viol. ✓ Clean CCCCCCCCCCCCCCCCCCCCOC[C@H](COP(=O)(O)OC[C@@H](…
R16 RCSB PDB P0C0S1 226.4 Da LogP 6.49 TPSA 0.0 1 viol. ✓ Clean CCCCCCCCCCCCCCCC

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.