KpKP13 Protein target profile

putative inorganic polyphosphate/ATP-NAD kinase

Accession: KP13_02430

Gene: ppnK AHE43134.1 3D evidence: AlphaFold DB model + ColabFold model UniProt A0A0H3GU51
Length 292
Pocket druggability (P2Rank · AlphaFold DB model) 0.091
Direct ligand evidence 0 105 total records
Functional annotation 1 EC 7 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 (%)
27.632 Lower values reduce human off-target concern.
Human E-value
8.65e-19
Gut microbiome similarity
3.0% of screened genomes Lower prevalence suggests narrower overlap with the screened gut microbiome.

Essentiality

Essential (DEG)
Y
DEG identity (%)
95.205 Higher values support similarity to known essential genes.
DEG E-value
0.0 Smaller values mean stronger essential-gene similarity.

Structure confidence

ColabFold pLDDT
91.73 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) 0.091
Structure A0A0H3GU51
Pocket Pocket 1
Druggability (FPocket) 0.431
Structure A0A0H3GU51
Pocket Pocket 3
ColabFold model
P2Rank 0.039 · Pocket 1
FPocket 0.332 · Pocket 11
Core conservation Conserved core gene
Roary core
CoreCruncher core
Gut microbiome 144 / 4744 genomes with a hit
Prevalence 3.0%

Sequence

Primary amino-acid sequence viewer.

MKNHFKCIGIVGHPRHPTALTTHEMLWRWLCSKGYEVLVEQQIAHELQLSNVKTGTLAEIGQQADLAVVVGGDGNMLGAARTLARYDINVIGINRGNLGFLTDLDPDNALQQLADVLEGHYIAEKRFLLEAQVCQQDCQKRISTAINEVVLHPGKVAHMIEFEVYIDEVFAFSQRSDGLIISTPTGSTAYSLSAGGPILTPSLDAITLVPMFPHTLSARPLVINGDSTIRLRFSHRCSDLEISCDSQIALPIQDGEDVLIRRCDYHLNLIHPKDYSYFNTLSTKLGWSKKLF

Functional annotations

Enzyme classification and Gene Ontology terms linked to this protein.

1 EC 7 GO

Subcellular localization

Localization
Cytoplasmic

Enzyme Commission (EC)

1

Gene Ontology (GO)

7
  • GO:0003951 Catalysis of the reaction: ATP + NAD+ = ADP + H+ + NADP+.
  • GO:0006741 The chemical reactions and pathways resulting in the formation of nicotinamide adenine dinucleotide phosphate (NADP+), a coenzyme that interconverts with its reduced form, NADPH, in many redox and biosynthetic reactions.
  • GO:0019674 The chemical reactions and pathways involving nicotinamide adenine dinucleotide (NAD+), a coenzyme that interconverts with its reduced form, NADH, in many redox and catabolic reactions.
  • GO:0005737 The contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures.
  • GO:0005524 Binding to ATP, adenosine 5'-triphosphate, a universally important coenzyme and enzyme regulator.
  • GO:0046872 Binding to a metal ion.
  • GO:0051287 Binding to nicotinamide adenine dinucleotide, a coenzyme involved in many redox and biosynthetic reactions; binding may be to either the oxidized form, NAD+, or the reduced form, NADH.

Sequence domains and features

Domain and signature matches imported from InterPro and related databases.

14 records
Show feature table
Start End DB Term Name
22 287 Gene3D G3DSA:3.40.50.10330 -
22 287 InterPro IPR017438 Inorganic polyphosphate/ATP-NAD kinase, N-terminal
128 264 FunFam G3DSA:2.60.200.30:FF:000001 NAD kinase
6 287 Hamap MF_00361 NAD kinase [nadK].
6 287 InterPro IPR002504 NAD kinase
8 121 Pfam PF01513 ATP-NAD kinase N-terminal domain
8 121 InterPro IPR002504 NAD kinase
128 264 Gene3D G3DSA:2.60.200.30 -
128 264 InterPro IPR017437 ATP-NAD kinase, PpnK-type, C-terminal
22 143 FunFam G3DSA:3.40.50.10330:FF:000004 NAD kinase
3 289 PANTHER PTHR20275 NAD KINASE
7 289 SUPERFAMILY SSF111331 NAD kinase/diacylglycerol kinase-like
7 289 InterPro IPR016064 NAD kinase/diacylglycerol kinase-like domain superfamily
147 271 Pfam PF20143 ATP-NAD kinase C-terminal domain

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
0.091
Show in viewer
Surrounding area
Pocket 2 P2Rank #2
0.052
Show in viewer
Surrounding area
Pocket 3 P2Rank #3
0.022
Likely same site as FPocket 1 2.7 Å 6 shared residues 100% of smaller site
Show in viewer
Surrounding area
Pocket 4 P2Rank #4
0.007
Likely same site as FPocket 3 1.2 Å 9 shared residues 100% of smaller site
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
0.431
Likely same site as P2Rank 4 1.2 Å 9 shared residues 100% of smaller site
Show in viewer
Surrounding area
Pocket 2 FPocket #1
0.206
Likely same site as P2Rank 3 2.7 Å 6 shared residues 100% of smaller site
Show in viewer
Surrounding area
Residue sets
UniProt: Active site:73-73 Proton acceptor
UniProt: Binding site:147-148
UniProt: Binding site:158-158
UniProt: Binding site:175-175
UniProt: Binding site:177-177
UniProt: Binding site:188-193
UniProt: Binding site:247-247
UniProt: Binding site:73-74
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_A0A0H3GU51
AlphaFold DB full sequence Viewing
ColabFold KP13_02430
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.

105 records
Chemistry signal

Structural and bioactivity evidence are both available for this target.

Direct evidence 0 same-protein records
Transferred evidence 55 records from similar proteins
Structural ligands 52 0 loaded crystals
Measured bioactivity 3 direct and transferred ChEMBL records
Proposed compounds 50 similarity-based ZINC candidates
Best available ligand signal
5A8 PDB via homolog 524.6 Da · LogP 1.27 · TPSA 213.0 Open detail RCSB PDB
5A9 PDB via homolog Detail RCSB PDB
5AG PDB via homolog Detail RCSB PDB
5AJ PDB via homolog Detail RCSB PDB
5AK 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
5A8 RCSB PDB Q8Y8D7 524.6 Da LogP 1.27 TPSA 213.0 2 viol. Alert c1ccc2c(c1)c(c[nH]2)CCNC(=O)CSc3nc4c(ncnc4n3[C@…
5A9 RCSB PDB Q8Y8D7 564.4 Da LogP 1.55 TPSA 197.2 2 viol. Alert c1cc(cc(c1)Br)CCNC(=O)CSc2nc3c(ncnc3n2[C@H]4[C@…
5AG RCSB PDB Q8Y8D7 509.6 Da LogP 0.77 TPSA 197.2 2 viol. Alert C#Cc1cccc(c1)CCNC(=O)CSc2nc3c(ncnc3n2C4C(C(C(O4…
5AJ RCSB PDB Q8Y8D7 525.6 Da LogP 0.67 TPSA 225.8 2 viol. Alert c1ccc2c(c1)[nH]c(n2)CCNC(=O)CSc3nc4c(ncnc4n3[C@…
5AK RCSB PDB Q8Y8D7 539.4 Da LogP 0.23 TPSA 168.6 2 viol. ✓ Clean c1cc(cc(c1)Br)CCNC(=O)CSc2nc3c(ncnc3n2[C@H]4[C@…
5AQ RCSB PDB Q8Y8D7 460.5 Da LogP -0.53 TPSA 168.6 1 viol. ✓ Clean c1ccc(cc1)CCNC(=O)CSc2nc3c(ncnc3n2[C@H]4[C@@H](…
5CI RCSB PDB Q8Y8D7 519.3 Da LogP -2.41 TPSA 243.2 3 viol. ✓ Clean c1nc(c2c(n1)n(c(n2)Br)[C@H]3[C@@H]([C@@H]([C@H]…
5NB RCSB PDB Q8Y8D7 345.2 Da LogP -1.25 TPSA 145.3 ✓ Ro5 ✓ Clean c1nc(c2c(n1)n(c(n2)Br)[C@H]3[C@@H]([C@@H]([C@H]…
A22 RCSB PDB Q8Y8D7 756.4 Da LogP -2.56 TPSA 387.4 3 viol. ✓ Clean c1nc(c2c(n1)n(cn2)[C@H]3[C@@H]([C@@H]([C@H](O3)…
A2D RCSB PDB Q8Y8D7 676.4 Da LogP -2.68 TPSA 340.9 3 viol. ✓ Clean c1nc(c2c(n1)n(cn2)[C@H]3[C@@H]([C@@H]([C@H](O3)…
A3N RCSB PDB Q8Y8D7 304.3 Da LogP -1.75 TPSA 131.3 ✓ Ro5 ✓ Clean C#CCNCC1C(C(C(O1)n2cnc3c2ncnc3N)O)O
AOC RCSB PDB Q8Y8D7 305.3 Da LogP -1.32 TPSA 128.5 ✓ Ro5 ✓ Clean C#CCOCC1C(C(C(O1)n2cnc3c2ncnc3N)O)O
CC5 RCSB PDB Q8Y8D7 237.2 Da LogP -1.34 TPSA 119.3 ✓ Ro5 ✓ Clean c1nc(c2c(n1)n(cn2)[C@H]3[C@@H]([C@@H](CO3)O)O)N
DTA RCSB PDB Q8Y8D7 564.6 Da LogP -1.55 TPSA 238.6 3 viol. ✓ Clean c1nc(c2c(n1)n(cn2)[C@H]3[C@@H]([C@@H]([C@H](O3)…
JXB RCSB PDB Q8Y8D7 311.1 Da LogP 2.26 TPSA 118.4 ✓ Ro5 Alert c1nc(c2c(n1)n(c(n2)Br)CCCCN=[N+]=[N-])N
JXE RCSB PDB Q8Y8D7 349.0 Da LogP 2.35 TPSA 69.6 ✓ Ro5 ✓ Clean c1nc(c2c(n1)n(c(n2)Br)CCCCBr)N
JXH RCSB PDB Q8Y8D7 298.1 Da LogP 1.87 TPSA 78.8 ✓ Ro5 ✓ Clean c1nc(c2c(n1)n(c(n2)Br)[C@H]3CCCCO3)N
JXK RCSB PDB Q8Y8D7 271.1 Da LogP 0.52 TPSA 95.6 ✓ Ro5 ✓ Clean c1nc(c2c(n1)n(c(n2)Br)CCCN)N
JXN RCSB PDB Q8Y8D7 242.1 Da LogP 1.19 TPSA 69.6 ✓ Ro5 ✓ Clean CCn1c2c(c(ncn2)N)nc1Br
JXQ RCSB PDB Q8Y8D7 215.3 Da LogP 1.21 TPSA 69.6 ✓ Ro5 ✓ Clean C#CCCCCn1cnc2c1ncnc2N
JXT RCSB PDB Q8Y8D7 280.1 Da LogP 1.58 TPSA 69.6 ✓ Ro5 ✓ Clean C#CCCCn1c2c(c(ncn2)N)nc1Br
JXW RCSB PDB Q8Y8D7 211.7 Da LogP 0.96 TPSA 69.6 ✓ Ro5 ✓ Clean Cc1nc2c(ncnc2n1CCCl)N
JXZ RCSB PDB Q8Y8D7 193.2 Da LogP -0.29 TPSA 89.8 ✓ Ro5 ✓ Clean Cc1nc2c(ncnc2n1CCO)N
JY2 RCSB PDB Q8Y8D7 215.3 Da LogP 1.13 TPSA 69.6 ✓ Ro5 ✓ Clean Cc1nc2c(ncnc2n1CCCC#C)N
JY5 RCSB PDB Q8Y8D7 273.3 Da LogP 0.45 TPSA 99.1 ✓ Ro5 ✓ Clean c1nc(c2c(n1)n(c(n2)C#CCO)C3CCCCO3)N
JY8 RCSB PDB Q8Y8D7 177.2 Da LogP 0.74 TPSA 69.6 ✓ Ro5 ✓ Clean CCn1c(nc2c1ncnc2N)C
JYB RCSB PDB Q8Y8D7 187.2 Da LogP 0.41 TPSA 69.6 ✓ Ro5 ✓ Clean CCn1c(nc2c1ncnc2N)C#C
JYE RCSB PDB Q8Y8D7 297.1 Da LogP 1.87 TPSA 118.4 ✓ Ro5 Alert c1nc(c2c(n1)n(c(n2)Br)CCCN=[N+]=[N-])N
JYK RCSB PDB Q8Y8D7 283.1 Da LogP 1.48 TPSA 118.4 ✓ Ro5 Alert c1nc(c2c(n1)n(c(n2)Br)CCN=[N+]=[N-])N
JYN RCSB PDB Q8Y8D7 232.3 Da LogP 1.50 TPSA 118.4 ✓ Ro5 Alert c1nc(c2c(n1)n(cn2)CCCCN=[N+]=[N-])N
JYQ RCSB PDB Q8Y8D7 265.3 Da LogP 1.47 TPSA 86.7 ✓ Ro5 ✓ Clean CC(=O)SCCCCn1cnc2c1ncnc2N
JYT RCSB PDB Q8Y8D7 272.1 Da LogP 0.55 TPSA 89.8 ✓ Ro5 ✓ Clean c1nc(c2c(n1)n(c(n2)Br)CCCO)N
JYW RCSB PDB Q8Y8D7 286.1 Da LogP 0.94 TPSA 89.8 ✓ Ro5 ✓ Clean c1nc(c2c(n1)n(c(n2)Br)CCCCO)N
K1Z RCSB PDB Q8Y8D7 650.5 Da LogP -3.45 TPSA 314.6 3 viol. ✓ Clean c1nc(c2c(n1)n(cn2)C3C(C(C(O3)COCC#Cc4nc5c(ncnc5…
K28 RCSB PDB Q8Y8D7 663.5 Da LogP -3.54 TPSA 308.6 3 viol. ✓ Clean CN(CC#Cc1nc2c(ncnc2n1C3C(C(C(O3)CO)O)OP(=O)(O)O…
K2H RCSB PDB Q8Y8D7 451.5 Da LogP -1.74 TPSA 203.0 1 viol. ✓ Clean CN(CC#Cc1[nH]c2c(n1)c(ncn2)N)CC3C(C(C(O3)n4cnc5…
K2K RCSB PDB Q8Y8D7 451.5 Da LogP -1.69 TPSA 211.8 2 viol. ✓ Clean c1nc(c2c(n1)[nH]c(n2)C#CCCNCC3C(C(C(O3)n4cnc5c4…
K2W RCSB PDB Q8Y8D7 583.6 Da LogP -3.61 TPSA 270.9 3 viol. ✓ Clean c1nc(c2c(n1)n(cn2)C3C(C(C(O3)CNCCC#Cc4nc5c(ncnc…
K38 RCSB PDB Q8Y8D7 569.5 Da LogP -4.00 TPSA 270.9 3 viol. ✓ Clean c1nc(c2c(n1)n(cn2)C3C(C(C(O3)CNCC#Cc4nc5c(ncnc5…
K3B RCSB PDB Q8Y8D7 438.4 Da LogP -1.66 TPSA 209.0 1 viol. ✓ Clean c1nc(c2c(n1)[nH]c(n2)C#CCOCC3C(C(C(O3)n4cnc5c4n…
K3E RCSB PDB Q8Y8D7 569.5 Da LogP -3.60 TPSA 273.9 3 viol. ✓ Clean c1nc(c2c(n1)n(cn2)C3C(C(C(O3)COCC#Cc4nc5c(ncnc5…
K3H RCSB PDB Q8Y8D7 583.6 Da LogP -3.66 TPSA 262.1 3 viol. ✓ Clean CN(CC#Cc1nc2c(ncnc2n1C3C(C(C(O3)CO)O)O)N)CC4C(C…
K3K RCSB PDB Q8Y8D7 570.5 Da LogP -3.57 TPSA 268.1 3 viol. ✓ Clean c1nc(c2c(n1)n(cn2)C3C(C(C(O3)COCC#Cc4nc5c(ncnc5…
KF5 RCSB PDB Q8Y8D7 219.2 Da LogP 1.11 TPSA 78.8 ✓ Ro5 ✓ Clean c1nc(c2c(n1)n(cn2)[C@@H]3CCCCO3)N
MTA RCSB PDB Q8Y8D7 297.3 Da LogP -0.61 TPSA 119.3 ✓ Ro5 ✓ Clean CSC[C@@H]1[C@H]([C@H]([C@@H](O1)n2cnc3c2ncnc3N)…
POP RCSB PDB O30297 176.0 Da LogP -2.08 TPSA 129.9 ✓ Ro5 ✓ Clean O[P@@](=O)([O-])O[P@@](=O)(O)[O-]
Q9H RCSB PDB Q8Y8D7 613.6 Da LogP -3.78 TPSA 280.1 3 viol. ✓ Clean c1nc(c2c(n1)n(c(n2)C#CCOCC3C(C(C(O3)n4cnc5c4ncn…
Q9K RCSB PDB Q8Y8D7 626.6 Da LogP -3.94 TPSA 288.1 3 viol. ✓ Clean c1nc(c2c(n1)n(cn2)C3C(C(C(O3)CN(CCCN)CC#Cc4nc5c…
Q9N RCSB PDB Q8Y8D7 654.6 Da LogP -3.71 TPSA 303.0 3 viol. ✓ Clean c1nc(c2c(n1)n(cn2)C3C(C(C(O3)COCC#Cc4nc5c(ncnc5…
Z8B RCSB PDB Q8Y8D7 371.2 Da LogP 0.10 TPSA 168.1 ✓ Ro5 Alert c1nc(c2c(n1)n(c(n2)Br)[C@H]3[C@@H]([C@@H]([C@H]…
ZAS RCSB PDB Q8Y8D7 292.3 Da LogP -0.66 TPSA 168.1 ✓ Ro5 Alert c1nc(c2c(n1)n(cn2)[C@H]3[C@@H]([C@@H]([C@H](O3)…
ZNB RCSB PDB Q8Y8D7 709.5 Da LogP -1.65 TPSA 316.5 3 viol. Alert c1nc(c2c(n1)n(c(n2)SCC(=O)NC[C@@H]3[C@H]([C@H](…

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.