Protein target profile

KP13_00829

Flavohemoprotein

Genome: KpKP13 Gene: AHE43193.1 hmp 3D evidence: AlphaFold DB model + ColabFold model UniProt A0A0H3GWU0
Length 396
Pocket druggability 0.032
Direct ligand evidence 0 59 total records
Functional annotation 1 EC 11 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
Hit
Human identity (%)
26.012 Lower values reduce human off-target concern.
Human E-value
1.34e-08
Gut microbiome similarity
2.6% 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.

Localization

Localization
Cytoplasmic

Structure confidence

ColabFold pLDDT
94.27 0-100 confidence; >70 supports local structural interpretation.

Binding-site evidence

AlphaFold DB / UniProt model

The selected pocket score is the FPocket value used for ranking after applying the curated structure priority. It estimates small-molecule pocket quality; it is not experimental binding evidence. The 3D viewer may show a different loaded structure, so visible pockets can differ.

FPocket 0.032
Structure A0A0H3GWU0
Pocket Pocket 18
P2Rank 0.984
Structure A0A0H3GWU0
Pocket Pocket 1
ColabFold model
FPocket 0.942 · Pocket 25
P2Rank 0.992 · Pocket 1
Core conservation Conserved core gene
Roary core
CoreCruncher core
Gut microbiome 124 / 4744 genomes with a hit
Prevalence 2.6%

Cross-references

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

Sequence

Primary amino-acid sequence viewer.

MLDAQTIATVKATIPLLVETGPKLTAHFYDRMFAHNPELKEIFNMSNQRNGDQREALFNAIAAYASNIDNLPALLPAVEKIAQKHTSFQIKPEQYNIVGSHLLATLDEMFSPGQEVLDAWGKAYGVLANVFIGREAEIYQQNASKTGGWEGTRAFRIVKKTPRSQLITSFELEPVDGQPVADYQPGQYLAIWLKPEGFEYQEIRQYSLTRKADGKGYRIAVKREEGGQVSSWLHNHASEGDVVYLAAPAGDFFLNVKPQTPVTLLSGGVGQTPMLAMLDALAKSGHQGQVNWFHAAENGDVHAFADEVKALGAALPAFTSHVWYRTPTEADRQAGRFDSEGLMDLAAVADNIRDPQMQYYLCGPVAFMQFAAKQLVELGINKDNIHYECFGPHKVL

Functional annotations

Enzyme classification and Gene Ontology terms linked to this protein.

1 EC 11 GO

Enzyme Commission (EC)

1

Gene Ontology (GO)

11
  • GO:0008941 Catalysis of the reaction: 2 NO + 2 O2 + NAD(P)H + H+ = 2 nitrate + NAD(P)+.
  • GO:0051409 Any process that results in a change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a nitrosative stress stimulus. Nitrosative stress is a state often resulting from exposure to high levels of nitric oxide (NO) or the highly reactive oxidant peroxynitrite, which is produced following interaction of NO with superoxide anions.
  • GO:0016491 Catalysis of an oxidation-reduction (redox) reaction, a reversible chemical reaction in which the oxidation state of an atom or atoms within a molecule is altered. One substrate acts as a hydrogen or electron donor and becomes oxidized, while the other acts as hydrogen or electron acceptor and becomes reduced.
  • GO:0019825 Binding to oxygen (O2).
  • GO:0020037 Binding to a heme, a compound composed of iron complexed in a porphyrin (tetrapyrrole) ring.
  • GO:0071949 Binding to the oxidized form, FAD, of flavin-adenine dinucleotide, the coenzyme or the prosthetic group of various flavoprotein oxidoreductase enzymes.
  • GO:0046872 Binding to a metal ion.
  • GO:0005344 Binding to oxygen and delivering it to an acceptor molecule or a specific location.
  • GO:0071500 Any process that results in a change in state or activity of a cell (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a nitrosative stress stimulus. Nitrosative stress is a state often resulting from exposure to high levels of nitric oxide (NO) or the highly reactive oxidant peroxynitrite, which is produced following interaction of NO with superoxide anions.
  • GO:0046210 The chemical reactions and pathways resulting in the breakdown of nitric oxide, nitrogen monoxide (NO), a colorless gas only slightly soluble in water.
  • GO:0009636 Any process that results in a change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a toxic stimulus.

Sequence domains and features

Domain and signature matches imported from InterPro and related databases.

33 records
Show feature table
Start End DB Term Name
156 252 Pfam PF00970 Oxidoreductase FAD-binding domain
156 252 InterPro IPR008333 Flavoprotein pyridine nucleotide cytochrome reductase-like, FAD-binding domain
263 282 PRINTS PR00410 Phenol hydroxylase reductase family signature
358 366 PRINTS PR00410 Phenol hydroxylase reductase family signature
247 256 PRINTS PR00410 Phenol hydroxylase reductase family signature
183 195 PRINTS PR00410 Phenol hydroxylase reductase family signature
1 143 Gene3D G3DSA:1.10.490.10 Globins
1 143 InterPro IPR012292 Globin/Protoglobin
1 143 FunFam G3DSA:1.10.490.10:FF:000003 Flavohemoprotein
255 396 FunFam G3DSA:3.40.50.80:FF:000010 Flavohemoprotein
148 253 SUPERFAMILY SSF63380 Riboflavin synthase domain-like
148 253 InterPro IPR017938 Riboflavin synthase-like beta-barrel
150 255 ProSiteProfiles PS51384 Ferredoxin reductase-type FAD binding domain profile.
150 255 InterPro IPR017927 FAD-binding domain, ferredoxin reductase-type
2 139 CDD cd14776 HmpEc-globin-like
149 253 Gene3D G3DSA:2.40.30.10 Translation factors
256 394 SUPERFAMILY SSF52343 Ferredoxin reductase-like, C-terminal NADP-linked domain
256 394 InterPro IPR039261 Ferredoxin-NADP reductase (FNR), nucleotide-binding domain
149 253 FunFam G3DSA:2.40.30.10:FF:000034 Flavohemoprotein
264 372 Pfam PF00175 Oxidoreductase NAD-binding domain
264 372 InterPro IPR001433 Oxidoreductase FAD/NAD(P)-binding
1 132 ProSiteProfiles PS01033 Globin family profile.
1 132 InterPro IPR000971 Globin
1 142 SUPERFAMILY SSF46458 Globin-like
1 142 InterPro IPR009050 Globin-like superfamily
1 395 PANTHER PTHR43396 FLAVOHEMOPROTEIN
147 393 CDD cd06184 flavohem_like_fad_nad_binding
1 396 Hamap MF_01252 Flavohemoprotein [hmp].
1 396 InterPro IPR023950 Flavohemoprotein
256 396 Gene3D G3DSA:3.40.50.80 -
256 396 InterPro IPR039261 Ferredoxin-NADP reductase (FNR), nucleotide-binding domain
27 130 Pfam PF00042 Globin
27 130 InterPro IPR000971 Globin

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

Probability: high ≥ 0.5 · medium 0.2–0.49 · low < 0.2

Site 1 P2Rank #1
0.984
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Surrounding area
Site 2 P2Rank #2
0.37
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Surrounding area
Site 3 P2Rank #3
0.304
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Surrounding area
Site 4 P2Rank #4
0.137
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Surrounding area
Site 5 P2Rank #5
0.079
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Surrounding area
Residue sets
UniProt: Active site:135-135 Charge relay system
UniProt: Active site:95-95 Charge relay system
UniProt: Binding site:188-188
UniProt: Binding site:204-207
UniProt: Binding site:268-273
UniProt: Binding site:389-392
UniProt: Binding site:85-85 proximal binding residue
UniProt: Site:29-29 Involved in heme-bound ligand stabilization and O-O bond activation
UniProt: Site:388-388 Influences the redox potential of the prosthetic heme and FAD groups
UniProt: Site:84-84 Influences the redox potential of the prosthetic heme and FAD groups
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_A0A0H3GWU0
AlphaFold DB full sequence Viewing
ColabFold KP13_00829
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
AZI PDB via homolog 42.0 Da · LogP 0.87 · TPSA 58.7 Open detail RCSB PDB
DGG PDB via homolog Detail RCSB PDB
ECN PDB via homolog Detail RCSB PDB
FDA PDB via homolog Detail RCSB PDB
FES 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
AZI RCSB PDB P04252 42.0 Da LogP 0.87 TPSA 58.7 ✓ Ro5 Alert [N-]=[N+]=[N-]
DGG RCSB PDB P39662 735.0 Da LogP 9.75 TPSA 148.8 2 viol. ✓ Clean CCCCCCCCCCCCCCCC(=O)OC[C@H](CO[P@@](=O)(O)OC[C@…
ECN RCSB PDB A6ZUP2 381.7 Da LogP 5.80 TPSA 27.1 1 viol. ✓ Clean c1cc(ccc1COC(Cn2ccnc2)c3ccc(cc3Cl)Cl)Cl
FDA RCSB PDB P22868 787.6 Da LogP -1.75 TPSA 363.3 3 viol. ✓ Clean Cc1cc2c(cc1C)N(C3=C(N2)C(=O)NC(=O)N3)C[C@@H]([C…
FES RCSB PDB P22868 175.8 Da LogP 1.29 TPSA 0.0 ✓ Ro5 ✓ Clean S1[Fe]S[Fe]1
KKK RCSB PDB P39662 531.4 Da LogP 4.21 TPSA 69.1 1 viol. Alert CC(=O)N1CCN(CC1)c2ccc(cc2)OC[C@H]3CO[C@](O3)(Cn…
NO2 RCSB PDB A6ZUP2 46.0 Da LogP 0.25 TPSA 52.5 ✓ Ro5 ✓ Clean N(=O)[O-]
OXY RCSB PDB B3DUZ7 32.0 Da LogP 0.07 TPSA 34.1 ✓ Ro5 ✓ Clean O=O
X89 RCSB PDB P39662 416.1 Da LogP 6.45 TPSA 27.1 1 viol. ✓ Clean c1cc(c(cc1Cl)Cl)CO[C@@H](Cn2ccnc2)c3ccc(cc3Cl)Cl

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.