Protein profile

VK055_3738

proton antiporter-2 family protein

Genome: KpATCC43816

Gene: AIK82293.1 Structure source: AlphaFold + ColabFold UniProt A0A0H3H3Y3
Amino acids 601
Annotations 9
Features 58
PDB binders 4
Druggability 0.763

Overview

Basic information about this protein and its source genome.

Accession
VK055_3738
Gene
AIK82293.1
Status
annotated
Amino acids
601
Structure source
AlphaFold + ColabFold

Target profile

Computed evidence for target prioritization.

Human off-target
hit
Human identity (%)
35.938
Human E-value
1.95e-09
Gut microbiome off-target
hit
Essential (DEG)
N
DEG identity (%)
35.621
Localization
CytoplasmicMembrane
ColabFold pLDDT
84.0

Selected Druggability evidence

AlphaFold / UniProt model

Selected Druggability is the FPocket score chosen for ranking using the curated structure priority. The 3D viewer may show a different loaded structure, so its visible pockets can differ.

FPocket 0.763
Structure A0A0H3H3Y3
Pocket Pocket 14
P2Rank 0.767
Structure A0A0H3H3Y3
Pocket Pocket 1
ColabFold model
FPocket 0.897 · Pocket 56
P2Rank 0.584 · Pocket 1
Core conservation Conserved core gene
Roary core
CoreCruncher core
Gut microbiome 120 / 4744 genomes with a hit
Normalized 0.025

Sequence

Primary amino-acid sequence viewer.

Functional Annotations

Enzyme classification and Gene Ontology terms linked to this protein.

9 GO

Gene Ontology (GO)

9
  • GO:0016020 A lipid bilayer along with all the proteins and protein complexes embedded in it and attached to it.
  • GO:0006812 The directed movement of a monoatomic cation, into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore. Monatomic cations (also called simple cations) are positively charged ions consisting of exactly one atom.
  • GO:0008324 Enables the transfer of cation 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:0015503 Enables the transfer of a solute or solutes from one side of a membrane to the other according to the reaction: K+(in) + H+(out) = K+(out) + H+(in), where glutathione maintains the closed state.
  • 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:1902600 The directed movement of a proton across a membrane.
  • GO:0015297 Enables the active transport of a solute across a membrane by a mechanism whereby two or more species are transported in opposite directions in a tightly coupled process not directly linked to a form of energy other than chemiosmotic energy. The reaction is: solute A(out) + solute B(in) = solute A(in) + solute B(out).
  • GO:0006813 The directed movement of potassium ions (K+) into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore.

Sequence Features

Domain/signature hits from InterPro and related databases.

58 records
Show feature table
Start End DB Term Name
147 171 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
6 25 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
324 343 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
108 112 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
374 601 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
29 51 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
344 354 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
26 31 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
402 530 SUPERFAMILY SSF51735 NAD(P)-binding Rossmann-fold domains
402 530 InterPro IPR036291 NAD(P)-binding domain superfamily
232 236 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
148 170 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
324 343 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
213 231 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
32 50 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
292 314 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
113 135 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
356 373 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
403 514 Pfam PF02254 TrkA-N domain
403 514 InterPro IPR003148 Regulator of K+ conductance, N-terminal
180 202 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
1 5 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
56 75 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
5 24 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
569 592 Coils Coil Coil
76 86 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
12 373 Pfam PF00999 Sodium/hydrogen exchanger family
12 373 InterPro IPR006153 Cation/H+ exchanger
313 323 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
56 73 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
172 182 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
3 385 FunFam G3DSA:1.20.1530.20:FF:000001 Glutathione-regulated potassium-efflux system protein KefB
267 286 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
113 135 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
292 312 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
223 245 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
5 589 PANTHER PTHR46157 K(+) EFFLUX ANTIPORTER 3, CHLOROPLASTIC
87 107 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
256 266 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
3 384 Gene3D G3DSA:1.20.1530.20 -
3 384 InterPro IPR038770 Sodium/solute symporter superfamily
355 373 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
14 283 NCBIfam TIGR00932 monovalent cation:proton antiporter-2 (CPA2) family protein
14 283 InterPro IPR004771 K+/H+ exchanger
51 55 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
136 146 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
237 255 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
402 524 ProSiteProfiles PS51201 RCK N-terminal domain profile.
402 524 InterPro IPR003148 Regulator of K+ conductance, N-terminal
265 287 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
400 562 Gene3D G3DSA:3.40.50.720 -
202 212 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
399 562 FunFam G3DSA:3.40.50.720:FF:000036 Glutathione-regulated potassium-efflux system protein KefB
183 201 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
2 598 Hamap MF_01412 Glutathione-regulated potassium-efflux system protein KefB [kefB].
2 598 InterPro IPR020884 Glutathione-regulated potassium-efflux system protein KefB
287 291 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
86 108 TMHMM TMhelix 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; predicted models typically cover the full protein.

3D visualization script Full viewer

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Structural evidence

0 + 2

Experimental PDB entries and predicted models. Click Switch to display a different structure in the viewer.

Entry Method Resolution Chain Coverage Links Status
AlphaFold AF_A0A0H3H3Y3
AlphaFold full sequence Viewing
ColabFold VK055_3738
ColabFold full sequence Loaded
Pocket details FPocket · P2Rank — toggle visibility and zoom from here, or open full viewer

Pockets (FPOCKET)

Showing top-ranked FPocket candidates by druggability. Druggability is color-coded: high (0.7 or higher), medium (0.4 to 0.69), low (below 0.4).

FPOCKET Sticks Spheres Surfaces Druggability Labels Zoom Positions
14 0.763
37 0.708
5 0.255
53 0.233

Pockets (P2RANK)

Showing top-ranked P2Rank candidates by probability. Probability is color-coded per P2Rank calibration: high (≥ 0.5), medium (0.2 – 0.49), low (< 0.2).

P2RANK Sticks Spheres Surfaces Score Probability Labels Zoom Positions
1 9.88 0.531
2 5.02 0.228
3 4.15 0.168
4 4.12 0.166
5 3.85 0.15

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.

54 records

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
7E8 Q5SIA2 300.4 Da LogP 3.36 TPSA 66.8 ✓ Ro5 ✓ Clean CCCCCC/C=C\CCCCCC(=O)OC[C@@H](CO)O
ESG P03819 432.5 Da LogP -2.26 TPSA 196.2 ✓ Ro5 ✓ Clean CCN1C(=O)C[C@@H](C1=O)SC[C@@H](C(=O)NCC(=O)O)NC…
GSH P03819 307.3 Da LogP -2.21 TPSA 158.8 1 viol. ✓ Clean C(CC(=O)N[C@@H](CS)C(=O)NCC(=O)O)[C@@H](C(=O)O)N
L9X P03819 432.5 Da LogP -2.26 TPSA 196.2 ✓ Ro5 ✓ Clean CCN1C(=O)C[C@H](C1=O)SC[C@@H](C(=O)NCC(=O)O)NC(…

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.