KpKP13 Protein target profile

Sulfate transport system permease protein cysT

Accession: KP13_03542

Gene: cysU AHE43348.1 3D evidence: AlphaFold DB model + ColabFold model UniProt A0A0H3GTC8
Export view
Length 277
Pocket druggability (P2Rank · AlphaFold DB model) 0.057
Functional annotation 0 EC 5 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.

Main supporting evidence

No similar human protein detected The current BLAST sequence screen did not find a significant human match, lowering apparent off-target risk. Core gene across strains Marked as conserved by both pan-genome tools: Roary and CoreCruncher. Strong predicted binding pocket FPocket selected-pocket score 0.87. This is a computational pocket signal, not binding validation. Structure available AlphaFold DB model + ColabFold model

Risks to review

Microbiome similarity 186 of 4744 screened genomes (3.9%) have a significant similarity hit. This target also has a predicted binding pocket (FPocket 0.87) — check the ligand evidence before deprioritizing on off-target risk alone. Weak second pocket-predictor signal P2Rank predicted binding-site probability 0.06.

Evidence gaps

No metabolic context No SBML/network-derived reaction evidence is loaded for this protein. No ligand evidence No experimental PDB ligands, measured ChEMBL bioactivity, or proposed ZINC compound records are available.
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
3.9% of screened genomes Lower prevalence suggests narrower overlap with the screened gut microbiome.

Essentiality

Essential (DEG)
Y
DEG identity (%)
40.385 Higher values support similarity to known essential genes.
DEG E-value
9.69e-62 Smaller values mean stronger essential-gene similarity.

Structure confidence

ColabFold pLDDT
89.0 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) 0.057
Structure A0A0H3GTC8
Pocket Pocket 1
Druggability (FPocket) 0.866
Structure A0A0H3GTC8
Pocket Pocket 3
ColabFold model
P2Rank 0.035 · Pocket 1
FPocket 0.871 · Pocket 3
Core conservation Conserved core gene
Roary core
CoreCruncher core
Gut microbiome 186 / 4744 genomes with a hit
Prevalence 3.9%

Sequence

Primary amino-acid sequence viewer.

MFAVSSKRVLPGFTLSLGTSLLFVCLILLLPLSALVMQLAQMSWAQYWDVITNPQVVAAYKVTLLSAFVASIFNGVFGLLMAWILTRYRFPGRTLLDALMDLPFALPTAVAGLTLASLFSVNGIYGEWLAKFDIKVTYTWLGIAVAMAFTSIPFVVRTVQPVLEELGPEYEEAAETLGATRWQSFRKVVLPELSPALLAGIALSFTRSLGEFGAVIFIAGNIAWKTEVTSLMIFIRLQEFDYPAASAIASVILAASLLLLFSINTLQSRFGRRVVGH

Functional annotations

Enzyme classification and Gene Ontology terms linked to this protein.

5 GO

Subcellular localization

Localization
CytoplasmicMembrane

Gene Ontology (GO)

5
  • 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:0015419 Enables the transfer of a solute or solutes from one side of a membrane to the other according to the reaction: ATP + H2O + sulfate(out) = ADP + phosphate + sulfate(in).
  • GO:0016020 A lipid bilayer along with all the proteins and protein complexes embedded in it and attached to it.
  • GO:0008272 OBSOLETE. The directed movement of sulfate into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore.
  • GO:0055085 The process in which a solute is transported across a lipid bilayer, from one side of a membrane to the other.

Sequence domains and features

Domain and signature matches imported from InterPro and related databases.

39 records
Show feature table
Start End DB Term Name
138 160 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
60 263 ProSiteProfiles PS50928 ABC transporter integral membrane type-1 domain profile.
60 263 InterPro IPR000515 ABC transporter type 1, transmembrane domain MetI-like
244 263 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
264 277 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
14 273 Gene3D G3DSA:1.10.3720.10 -
14 273 InterPro IPR035906 MetI-like superfamily
196 224 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
1 11 Phobius SIGNAL_PEPTIDE_N_REGION N-terminal region of a signal peptide.
35 57 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
188 205 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
15 37 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
212 234 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
244 266 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
157 195 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
137 156 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
3 273 PANTHER PTHR30406 SULFATE TRANSPORT SYSTEM PERMEASE PROTEIN
3 273 InterPro IPR005667 Sulphate ABC transporter permease protein 2
1 34 Phobius SIGNAL_PEPTIDE Signal peptide region
104 125 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
12 30 Phobius SIGNAL_PEPTIDE_H_REGION Hydrophobic region of a signal peptide.
9 271 NCBIfam TIGR02139 sulfate ABC transporter permease subunit CysT
9 271 InterPro IPR011865 Sulphate ABC transporter, permease protein CysT
16 264 SUPERFAMILY SSF161098 MetI-like
16 264 InterPro IPR035906 MetI-like superfamily
126 136 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
31 34 Phobius SIGNAL_PEPTIDE_C_REGION C-terminal region of a signal peptide.
84 103 Phobius CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
5 269 NCBIfam TIGR00969 sulfate ABC transporter permease subunit
5 269 InterPro IPR005667 Sulphate ABC transporter permease protein 2
62 84 TMHMM TMhelix Region of a membrane-bound protein predicted to be embedded in the membrane.
14 272 FunFam G3DSA:1.10.3720.10:FF:000004 Sulfate transport system permease protein CysT
58 83 Phobius TRANSMEMBRANE Region of a membrane-bound protein predicted to be embedded in the membrane.
62 252 CDD cd06261 TM_PBP2
62 252 InterPro IPR000515 ABC transporter type 1, transmembrane domain MetI-like
76 274 Pfam PF00528 Binding-protein-dependent transport system inner membrane component
76 274 InterPro IPR000515 ABC transporter type 1, transmembrane domain MetI-like
225 243 Phobius NON_CYTOPLASMIC_DOMAIN Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
104 126 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; 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
0.057
Likely same site as FPocket 3 7.7 Å 4 shared residues 40% of smaller site
Show in viewer
Surrounding area
Pocket 2 P2Rank #2
0.027
Show in viewer
Surrounding area
Pocket 3 P2Rank #3
0.024
Show in viewer
Surrounding area
Pocket 4 P2Rank #4
0.006
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
0.866
Likely same site as P2Rank 1 7.7 Å 4 shared residues 40% 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_A0A0H3GTC8
AlphaFold DB — — full sequence — Viewing
ColabFold KP13_03542
ColabFold — — full sequence — Loaded

Cross-references

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

Sequence

UniProt A0A0H3GTC8