KpATCC43816 Protein target profile

excinuclease ABC subunit B

Accession: VK055_1726

Gene: AIK80346.1 uvrB 3D evidence: AlphaFold DB model + ColabFold model Metabolism Not in network UniProt A0A0H3GKA2
Length 673
Pocket druggability (P2Rank · AlphaFold DB model) 0.91
Direct ligand evidence 0 56 total records
Functional annotation 0 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 (%)
33.036 Lower values reduce human off-target concern.
Human E-value
6.73e-06
Gut microbiome similarity
86.6% of screened genomes Lower prevalence suggests narrower overlap with the screened gut microbiome.

Essentiality

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

Structure confidence

ColabFold pLDDT
87.86 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) 0.91
Structure A0A0H3GKA2
Pocket Pocket 1
Druggability (FPocket) 0.333
Structure A0A0H3GKA2
Pocket Pocket 43
ColabFold model
P2Rank 0.894 · Pocket 1
FPocket 0.895 · Pocket 37
Core conservation Conserved core gene
Roary core
CoreCruncher core
Gut microbiome 4106 / 4744 genomes with a hit
Prevalence 86.6%

Metabolic context

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

This protein is not associated with the imported metabolic network for this genome.

Browse the genome's metabolic network

Imported from KpATCC43816.sbml · 2026-07-09

Sequence

Primary amino-acid sequence viewer.

MSKSFVLHSAFRPSGDQPEAIRRLEEGLEDGLAHQTLLGVTGSGKTFTIANVIADLQRPTMVLAPNKTLAAQLYGEMKEFFPENAVEYFVSYYDYYQPEAYVPSSDTFIEKDASVNEHIEQMRLSATKALLERRDVVVVASVSAIYGLGDPDLYLKMMLHLTVGMLIDQRAILRRLAELQYTRNDQAFQRGTFRVRGEVIDVFPAESDDIALRIELFDEEVERLSLFDPLTGHVEGTVPRYTIYPKTHYVTPRERIVQAMEEIKLELAERRKVLLANNKLLEEQRLTQRTQFDLEMMNELGYCSGIENYSRFLSGRGPGEPPPTLFDYLPADGLLVIDESHVTVPQIGGMYRGDRARKETLVEYGFRLPSALDNRPMKFEEFEALAPQTIYVSATPGAYELDKSGGEVVDQVVRPTGLLDPIIEVRPVATQVDDLLSEIRLRTAINERVLVTTLTKRMAEDLTEYLEEHGERVRYLHSDIDTVERMEIIRDLRLGEFDVLVGINLLREGLDMPEVSLVAILDADKEGFLRSERSLIQTIGRAARNVNGKAILYGDKITPSMAKAIGETERRREKQQRYNEEHGIVPQGLNKKVVDILQLGQGLAKTKAKGRGKAKAVEPAGLSAVDMTPKALQQKIHELEGQMMQHAQNLEFEEAAQIRDQLHQLRELFIAAS

Functional annotations

Enzyme classification and Gene Ontology terms linked to this protein.

11 GO

Subcellular localization

Localization
Cytoplasmic

Gene Ontology (GO)

11
  • GO:0005524 Binding to ATP, adenosine 5'-triphosphate, a universally important coenzyme and enzyme regulator.
  • GO:0009380 Any of the protein complexes formed by the UvrABC excinuclease system, which carries out nucleotide excision repair. Three different complexes are formed by the 3 proteins as they proceed through the excision repair process. First a complex consisting of two A subunits and two B subunits bind DNA and unwind it around the damaged site. Then, the A subunits disassociate leaving behind a stable complex between B subunits and DNA. Now, subunit C binds to this B+DNA complex and causes subunit B to nick the DNA on one side of the complex while subunit C nicks the DNA on the other side of the complex. DNA polymerase I and DNA ligase can then repair the resulting gap.
  • GO:0003677 Any molecular function by which a gene product interacts selectively and non-covalently with DNA (deoxyribonucleic acid).
  • GO:0005515 Binding to a protein.
  • GO:0016787 Catalysis of the hydrolysis of various bonds, e.g. C-O, C-N, C-C, phosphoric anhydride bonds, etc.
  • GO:0016887 Catalysis of the reaction: ATP + H2O = ADP + H+ phosphate. ATP hydrolysis is used in some reactions as an energy source, for example to catalyze a reaction or drive transport against a concentration gradient.
  • GO:0006289 A DNA repair process in which a small region of the strand surrounding the damage is removed from the DNA helix as an oligonucleotide. The small gap left in the DNA helix is filled in by the sequential action of DNA polymerase and DNA ligase. Nucleotide excision repair recognizes a wide range of substrates, including damage caused by UV irradiation (pyrimidine dimers and 6-4 photoproducts) and chemicals (intrastrand cross-links and bulky adducts).
  • GO:0005737 The contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures.
  • GO:0009381 Catalysis of the hydrolysis of ester linkages within deoxyribonucleic acid at sites flanking regions of damaged DNA to which the Uvr ABC excinuclease complexes bind.
  • GO:0004386 Catalysis of the reaction: ATP + H2O = ADP + phosphate, to drive the unwinding of a DNA or RNA helix.
  • GO:0009432 An error-prone process for repairing damaged microbial DNA.

Sequence domains and features

Domain and signature matches imported from InterPro and related databases.

46 records
Show feature table
Start End DB Term Name
625 669 SUPERFAMILY SSF46600 C-terminal UvrC-binding domain of UvrB
625 669 InterPro IPR036876 UVR domain superfamily
264 284 Coils Coil Coil
552 593 Pfam PF12344 Ultra-violet resistance protein B
552 593 InterPro IPR024759 UvrB, YAD/RRR-motif-containing domain
420 590 CDD cd18790 SF2_C_UvrB
5 414 CDD cd17916 DEXHc_UvrB
1 230 FunFam G3DSA:3.40.50.300:FF:000401 UvrABC system protein B
441 544 Pfam PF00271 Helicase conserved C-terminal domain
441 544 InterPro IPR001650 Helicase, C-terminal
613 673 Gene3D G3DSA:4.10.860.10 UVR domain
3 669 PANTHER PTHR24029 UVRABC SYSTEM PROTEIN B
3 669 InterPro IPR004807 UvrABC system, subunit B
636 656 Coils Coil Coil
9 425 SMART SM00487 ultradead3
9 425 InterPro IPR014001 Helicase superfamily 1/2, ATP-binding domain
633 668 ProSiteProfiles PS50151 UVR domain profile.
633 668 InterPro IPR001943 UVR domain
431 597 ProSiteProfiles PS51194 Superfamilies 1 and 2 helicase C-terminal domain profile.
431 597 InterPro IPR001650 Helicase, C-terminal
26 183 ProSiteProfiles PS51192 Superfamilies 1 and 2 helicase ATP-binding type-1 domain profile.
26 183 InterPro IPR014001 Helicase superfamily 1/2, ATP-binding domain
4 243 Gene3D G3DSA:3.40.50.300 -
4 243 InterPro IPR027417 P-loop containing nucleoside triphosphate hydrolase
269 414 Gene3D G3DSA:3.40.50.300 -
269 414 InterPro IPR027417 P-loop containing nucleoside triphosphate hydrolase
460 546 SMART SM00490 helicmild6
460 546 InterPro IPR001650 Helicase, C-terminal
5 415 SUPERFAMILY SSF52540 P-loop containing nucleoside triphosphate hydrolases
5 415 InterPro IPR027417 P-loop containing nucleoside triphosphate hydrolase
37 584 SUPERFAMILY SSF52540 P-loop containing nucleoside triphosphate hydrolases
37 584 InterPro IPR027417 P-loop containing nucleoside triphosphate hydrolase
634 667 Pfam PF02151 UvrB/uvrC motif
634 667 InterPro IPR001943 UVR domain
3 668 Hamap MF_00204 UvrABC system protein B [uvrB].
3 668 InterPro IPR004807 UvrABC system, subunit B
159 249 Pfam PF17757 UvrB interaction domain
159 249 InterPro IPR041471 UvrB, interaction domain
5 666 NCBIfam TIGR00631 excinuclease ABC subunit UvrB
5 666 InterPro IPR004807 UvrABC system, subunit B
16 92 Pfam PF04851 Type III restriction enzyme, res subunit
16 92 InterPro IPR006935 Helicase/UvrB, N-terminal
231 414 FunFam G3DSA:3.40.50.300:FF:000477 UvrABC system protein B
415 590 FunFam G3DSA:3.40.50.300:FF:000257 UvrABC system protein B
415 590 Gene3D G3DSA:3.40.50.300 -
415 590 InterPro IPR027417 P-loop containing nucleoside triphosphate hydrolase

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
0.91
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Surrounding area
Pocket 2 P2Rank #2
0.846
Likely same site as FPocket 43 4.7 Å 28 shared residues 88% of smaller site
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Surrounding area
Pocket 3 P2Rank #3
0.261
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Surrounding area
Pocket 4 P2Rank #4
0.086
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Surrounding area
Pocket 5 P2Rank #5
0.025
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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 #43
0.333 Unusual size
Likely same site as P2Rank 2 4.7 Å 28 shared residues 88% of smaller site
Show in viewer
Surrounding area
Residue sets
UniProt: Binding site:39-46
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_A0A0H3GKA2
AlphaFold DB full sequence Viewing
ColabFold VK055_1726
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.

56 records
Chemistry signal

Structural ligand evidence is available for this target.

Direct evidence 0 same-protein records
Transferred evidence 6 records from similar proteins
Structural ligands 6 0 loaded crystals
Measured bioactivity 0 direct and transferred ChEMBL records
Proposed compounds 50 similarity-based ZINC candidates
Best available ligand signal
ANP PDB via homolog 506.2 Da · LogP -2.06 · TPSA 281.9 Open detail RCSB PDB
BEF PDB via homolog Detail RCSB PDB
FLQ PDB via homolog Detail RCSB PDB
FLU PDB via homolog Detail RCSB PDB
IHP 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
ANP RCSB PDB Q9NR30 506.2 Da LogP -2.06 TPSA 281.9 3 viol. ✓ Clean c1nc(c2c(n1)n(cn2)[C@H]3[C@@H]([C@@H]([C@H](O3)…
BEF RCSB PDB P20449 66.0 Da LogP 0.88 TPSA 0.0 ✓ Ro5 ✓ Clean [Be-](F)(F)F
FLQ RCSB PDB P56981 516.6 Da LogP 4.09 TPSA 134.2 1 viol. ✓ Clean CC(=O)NCCCCCCNC(=O)c1ccc2c(c1)C3(c4ccc(cc4Oc5c3…
FLU RCSB PDB P37954 332.3 Da LogP 3.97 TPSA 87.7 ✓ Ro5 ✓ Clean c1ccc(c(c1)C2=C3C=CC(=O)C=C3Oc4c2ccc(c4)O)C(=O)O
IHP RCSB PDB P20449 660.0 Da LogP -3.13 TPSA 400.6 3 viol. ✓ Clean C1(C(C(C(C(C1OP(=O)(O)O)OP(=O)(O)O)OP(=O)(O)O)O…
M2A RCSB PDB P20449 560.4 Da LogP 0.16 TPSA 250.7 3 viol. ✓ Clean CNc1ccccc1C(=O)O[C@@H]2[C@@H]([C@@H](O[C@H]2n3c…

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.