KpATCC43816 Protein target profile

sucrose-6-phosphate hydrolase

Accession: VK055_4263

Gene: sacA AIK82808.1 3D evidence: AlphaFold DB model + ColabFold model Metabolism 8 reactions UniProt A0A0H3H2E4
Length 478
Pocket druggability (P2Rank · AlphaFold DB model) 0.863
Metabolic reactions 8
Chokepoint Yes
Direct ligand evidence 0 52 total records
Functional annotation 1 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
1.1% of screened genomes Lower prevalence suggests narrower overlap with the screened gut microbiome.

Essentiality

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

Structure confidence

ColabFold pLDDT
97.1 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) 0.863
Structure A0A0H3H2E4
Pocket Pocket 1
Druggability (FPocket) 0.304
Structure A0A0H3H2E4
Pocket Pocket 2
ColabFold model
P2Rank 0.882 · Pocket 1
FPocket 0.697 · Pocket 13
Core conservation Conserved core gene
Roary core
CoreCruncher core
Gut microbiome 54 / 4744 genomes with a hit
Prevalence 1.1%

Metabolic context

Reactions catalyzed, pathway membership, and centrality in the genome-scale metabolic network.

Explore metabolic network

Attractive metabolic target: catalyzes a consuming chokepoint reaction, more central than 88.8% of genes in this genome, no human homolog detected.

Relative network centrality 88.8% more central than 88.8% of genes in this genome
Chokepoint Chokepoint gene
Pathways

No specific KEGG pathway assigned - this reaction either has no KEGG mapping, or only matches a generic overview map with no route-level information.

Catalyzed reactions

8 reactions mapped to this gene in the metabolic model. Open the full network to see each one, with substrates/products and the reaction-reaction map.

Imported from KpATCC43816.sbml · 2026-07-09

Sequence

Primary amino-acid sequence viewer.

MMTYTISRAEQVLQTQRQALNLRWYPHYHLAARAGWINDPNGLVWFDGWYHAFYQHHPYSTQWGPMHWGHARSKDLVHWEHLPVALAPEGPEDKDGCFSGSAVVDGDTLALIYTGHKFHGDPGDEANLYQVQCLATSRDGIHFERQGMVVDTPPGMHHFRDPKVWREGDSWYMIVGAREGDTGQVRLYRSADLRQWQDAGVLDEAESTMGYMWECPDFFTLNGKRVLMFSPQGMQAAGFSNRNLFQSGYLIGEWQPGQRFIRHGEFREMDNGHDFYAPQSFSTPDGRRIVIGWLDMWESPLPEQQDGWAGMLSLPRELSLSADDRLQMRPAKEVESLRGAWFPWPVSTLNNQQTTMVDNCEAMEVNLRWDCARSSAEQYGLRFGDGLRIYVDAQQQRLVLERHYPQYGLCGTRSVPLTAGADLNLRIFFDSSSVEVFVNDGEACLSSRIYPQAPRRELALFAWSGSAALTEAGAWQLE

Functional annotations

Enzyme classification and Gene Ontology terms linked to this protein.

1 EC 5 GO

Subcellular localization

Localization
Cytoplasmic

Enzyme Commission (EC)

1

Gene Ontology (GO)

5
  • GO:0004564 Catalysis of the reaction: a fructofuranosylated fructofuranosyl acceptor + H2O = a non fructofuranosylated fructofuranosyl acceptor + a beta-D-fructofuranoside.
  • GO:0004553 Catalysis of the hydrolysis of any O-glycosyl bond.
  • GO:0005975 The chemical reactions and pathways involving carbohydrates, any of a group of organic compounds based of the general formula Cx(H2O)y.
  • GO:0005737 The contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures.
  • GO:0005985 The chemical reactions and pathways involving sucrose, the disaccharide fructofuranosyl-glucopyranoside.

Sequence domains and features

Domain and signature matches imported from InterPro and related databases.

17 records
Show feature table
Start End DB Term Name
348 476 Pfam PF08244 Glycosyl hydrolases family 32 C terminal
348 476 InterPro IPR013189 Glycosyl hydrolase family 32, C-terminal
9 477 PANTHER PTHR43101 BETA-FRUCTOSIDASE
21 330 SUPERFAMILY SSF75005 Arabinanase/levansucrase/invertase
21 330 InterPro IPR023296 Glycosyl hydrolase, five-bladed beta-propellor domain superfamily
14 452 NCBIfam TIGR01322 sucrose-6-phosphate hydrolase
14 452 InterPro IPR006232 Sucrose-6-phosphate hydrolase
330 478 SUPERFAMILY SSF49899 Concanavalin A-like lectins/glucanases
330 478 InterPro IPR013320 Concanavalin A-like lectin/glucanase domain superfamily
29 441 SMART SM00640 glyco_32
29 441 InterPro IPR001362 Glycoside hydrolase, family 32
35 320 CDD cd08996 GH32_FFase
2 342 Gene3D G3DSA:2.115.10.20 Glycosyl hydrolase domain; family 43
2 342 InterPro IPR023296 Glycosyl hydrolase, five-bladed beta-propellor domain superfamily
29 330 Pfam PF00251 Glycosyl hydrolases family 32 N-terminal domain
29 330 InterPro IPR013148 Glycosyl hydrolase family 32, N-terminal
346 478 Gene3D G3DSA:2.60.120.560 -

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
0.863
Likely same site as FPocket 2 1.3 Å 15 shared residues 94% of smaller site
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Surrounding area
Pocket 2 P2Rank #2
0.123
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Surrounding area
Pocket 3 P2Rank #3
0.068
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Surrounding area
Pocket 4 P2Rank #4
0.065
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Surrounding area
Pocket 5 P2Rank #5
0.047
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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 #2
0.304
Likely same site as P2Rank 1 1.3 Å 15 shared residues 94% 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_A0A0H3H2E4
AlphaFold DB full sequence Viewing
ColabFold VK055_4263
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.

52 records
Chemistry signal

Structural ligand evidence is available for this target.

Direct evidence 0 same-protein records
Transferred evidence 2 records from similar proteins
Structural ligands 2 0 loaded crystals
Measured bioactivity 0 direct and transferred ChEMBL records
Proposed compounds 50 similarity-based ZINC candidates
Best available ligand signal
DQQ PDB via homolog 163.2 Da · LogP -2.97 · TPSA 93.0 Open detail RCSB PDB
FRU PDB via homolog Detail RCSB PDB
ZINC13551953 ZINC proposed compound · Tanimoto 0.875 Detail ZINC
ZINC13761953 ZINC proposed compound · Tanimoto 0.875 Detail ZINC
ZINC4095790 ZINC proposed compound · Tanimoto 0.875 Detail ZINC

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
DQQ RCSB PDB Q93X60 163.2 Da LogP -2.97 TPSA 93.0 ✓ Ro5 ✓ Clean C([C@@H]1[C@H]([C@@H]([C@H](N1)CO)O)O)O
FRU RCSB PDB Q43866 180.2 Da LogP -3.22 TPSA 110.4 ✓ Ro5 ✓ Clean C([C@@H]1[C@H]([C@@H]([C@](O1)(CO)O)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.