KpKP13 Protein target profile

Ribonucleoside-diphosphate reductase 1 subunit alpha

Accession: KP13_00958

Gene: AHE43514.1 nrdA 3D evidence: AlphaFold DB model + ColabFold model UniProt A0A0H3GW79
Length 761
Pocket druggability (P2Rank · AlphaFold DB model) 0.788
Direct ligand evidence 0 75 total records
Functional annotation 1 EC 5 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 (%)
27.586 Lower values reduce human off-target concern.
Human E-value
6.44e-51
Gut microbiome similarity
3.2% of screened genomes Lower prevalence suggests narrower overlap with the screened gut microbiome.

Essentiality

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

Structure confidence

ColabFold pLDDT
93.21 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) 0.788
Structure A0A0H3GW79
Pocket Pocket 1
Druggability (FPocket) 0.354
Structure A0A0H3GW79
Pocket Pocket 22
ColabFold model
P2Rank 0.802 · Pocket 1
FPocket 0.663 · Pocket 43
Core conservation Conserved core gene
Roary core
CoreCruncher core
Gut microbiome 153 / 4744 genomes with a hit
Prevalence 3.2%

Sequence

Primary amino-acid sequence viewer.

MNQSLLVTKRDGTTERINLDKIHRVLDWAAEGLNNVSISQVELRSHIQFYDGIKTADIHETIIKAAADLISRDAPDYQYLAARLAIFHLRKKAFGQFEPPALYDHVVKMVEKGKYDHHLLEDYTEEEFQQMDGFLDHWRDMNFSYAAVKQLEGKYLVQNRVTGEIYESAQFLYILVAACLFSNYPRETRLDYIKRFYDAVSTFKISLPTPIMSGVRTPTRQFSSCVLIECGDSLDSINATSSAIVKYVSQRAGIGINAGRIRALGSPIRGGEAFHTGCIPFYKHFQTAVKSCSQGGVRGGAATLFYPMWHLEVESLLVLKNNRGTDANRVRHMDYGVQINKLMYTRLLKGGDITLFSPSDVPGLYDAFFADQDEFERLYTQYEQDDSIRKQRIKAVELFSLMMQERASTGRIYIQNVDHCNTHSPFDPVVAPVRQSNLCLEIALPTKPLEDVNDENGEIALCTLSAFNLGAIDSLDELEELAVLAVRALDALLDYQDYPIPAAKRGAMGRRTLGIGVINFAYYLAKHGKRYSDGSANNLTHKTFEAIQYYLLKASNELAIEQGACPWFNETTYAQGILPIDTYKKDLDGIVSEPLHYDWEALRESIKTHGLRNSTLSALMPSETSSQISNATNGIEPPRGHVSIKASKDGILRQVVPDYENLQNAYELLWEMPNNDGYLQLVGIMQKFIDQSISANTNYDPTRFPSGKVPMQQLLKDLLNAYKFGVKTLYYHNTRDGAEDAQDDLAPSIQDDGCESGACKI

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:0005524 Binding to ATP, adenosine 5'-triphosphate, a universally important coenzyme and enzyme regulator.
  • GO:0006260 The cellular metabolic process in which a cell duplicates one or more molecules of DNA. DNA replication begins when specific sequences, known as origins of replication, are recognized and bound by the origin recognition complex, and ends when the original DNA molecule has been completely duplicated and the copies topologically separated. The unit of replication usually corresponds to the genome of the cell, an organelle, or a virus. The template for replication can either be an existing DNA molecule or RNA.
  • GO:0004748 Catalysis of the reaction: 2'-deoxyribonucleoside diphosphate + thioredoxin disulfide + H2O = ribonucleoside diphosphate + thioredoxin. Thioredoxin disulfide is the oxidized form of thioredoxin.
  • GO:0005971 An enzyme complex composed of 2-4 or more subunits, which usually contains nonheme iron and requires ATP for catalysis. Catalyzes the formation of 2'-deoxyribonucleoside diphosphate from ribonucleoside diphosphate, using either thioredoxin disulfide or glutaredoxin disulfide as an acceptor.
  • GO:0009263 The chemical reactions and pathways resulting in the formation of a deoxyribonucleotide, a compound consisting of deoxyribonucleoside (a base linked to a deoxyribose sugar) esterified with a phosphate group at either the 3' or 5'-hydroxyl group of the sugar.

Sequence domains and features

Domain and signature matches imported from InterPro and related databases.

32 records
Show feature table
Start End DB Term Name
6 92 Pfam PF03477 ATP cone domain
6 92 InterPro IPR005144 ATP-cone domain
142 219 Pfam PF00317 Ribonucleotide reductase, all-alpha domain
142 219 InterPro IPR013509 Ribonucleotide reductase large subunit, N-terminal
6 746 PANTHER PTHR11573 RIBONUCLEOSIDE-DIPHOSPHATE REDUCTASE LARGE CHAIN
6 746 InterPro IPR039718 Ribonucleoside-diphosphate reductase large subunit
145 735 NCBIfam TIGR02506 ribonucleoside-diphosphate reductase subunit alpha
145 735 InterPro IPR013346 Ribonucleotide reductase, class I, alpha subunit, C-terminal
223 731 Pfam PF02867 Ribonucleotide reductase, barrel domain
223 731 InterPro IPR000788 Ribonucleotide reductase large subunit, C-terminal
599 621 ProSitePatterns PS00089 Ribonucleotide reductase large subunit signature.
599 621 InterPro IPR013346 Ribonucleotide reductase, class I, alpha subunit, C-terminal
342 395 Gene3D G3DSA:1.10.1650.20 -
473 496 PRINTS PR01183 Ribonucleotide reductase large chain signature
473 496 InterPro IPR000788 Ribonucleotide reductase large subunit, C-terminal
610 637 PRINTS PR01183 Ribonucleotide reductase large chain signature
610 637 InterPro IPR000788 Ribonucleotide reductase large subunit, C-terminal
511 533 PRINTS PR01183 Ribonucleotide reductase large chain signature
511 533 InterPro IPR000788 Ribonucleotide reductase large subunit, C-terminal
433 444 PRINTS PR01183 Ribonucleotide reductase large chain signature
433 444 InterPro IPR000788 Ribonucleotide reductase large subunit, C-terminal
539 562 PRINTS PR01183 Ribonucleotide reductase large chain signature
539 562 InterPro IPR000788 Ribonucleotide reductase large subunit, C-terminal
298 317 PRINTS PR01183 Ribonucleotide reductase large chain signature
298 317 InterPro IPR000788 Ribonucleotide reductase large subunit, C-terminal
5 95 ProSiteProfiles PS51161 ATP-cone domain profile.
5 95 InterPro IPR005144 ATP-cone domain
342 395 FunFam G3DSA:1.10.1650.20:FF:000001 Ribonucleoside-diphosphate reductase
209 733 Gene3D G3DSA:3.20.70.20 -
10 221 SUPERFAMILY SSF48168 R1 subunit of ribonucleotide reductase, N-terminal domain
10 221 InterPro IPR008926 Ribonucleotide reductase R1 subunit, N-terminal
222 740 SUPERFAMILY SSF51998 PFL-like glycyl radical enzymes

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
0.788
Likely same site as FPocket 5 5.4 Å 7 shared residues 88% of smaller site
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Surrounding area
Pocket 2 P2Rank #2
0.529
Likely same site as FPocket 22 1.3 Å 14 shared residues 93% of smaller site
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Surrounding area
Pocket 3 P2Rank #3
0.511
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Surrounding area
Pocket 4 P2Rank #4
0.362
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Surrounding area
Pocket 5 P2Rank #5
0.166
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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 #22
0.354
Likely same site as P2Rank 2 1.3 Å 14 shared residues 93% of smaller site
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Surrounding area
Pocket 2 FPocket #5
0.325
Likely same site as P2Rank 1 5.4 Å 7 shared residues 88% of smaller site
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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_A0A0H3GW79
AlphaFold DB full sequence Viewing
ColabFold KP13_00958
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.

75 records
Chemistry signal

Structural and bioactivity evidence are both available for this target.

Direct evidence 0 same-protein records
Transferred evidence 25 records from similar proteins
Structural ligands 16 0 loaded crystals
Measured bioactivity 9 direct and transferred ChEMBL records
Proposed compounds 50 similarity-based ZINC candidates
Best available ligand signal
2A5 PDB via homolog 455.3 Da · LogP -1.11 · TPSA 232.6 Open detail RCSB PDB
3X4 PDB via homolog Detail RCSB PDB
7LL PDB via homolog Detail RCSB PDB
ANP PDB via homolog Detail RCSB PDB
DAT 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
2A5 RCSB PDB P21524 455.3 Da LogP -1.11 TPSA 232.6 2 viol. ✓ Clean c1nc(c2c(n1)n(cn2)[C@H]3[C@@H]([C@@H]([C@H](O3)…
3X4 RCSB PDB P23921 418.5 Da LogP -0.12 TPSA 158.9 ✓ Ro5 ✓ Clean CC(C)(C(=O)NCCCC[C@H](C(=O)O)N)NC(=O)CN1C(=O)c2…
7LL RCSB PDB P23921 306.3 Da LogP 3.01 TPSA 81.9 ✓ Ro5 Alert c1ccc2c(c1)ccc(c2/C=N\NC(=O)c3ccccc3O)O
ANP RCSB PDB P21524 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)…
DAT RCSB PDB P00452 411.2 Da LogP -0.72 TPSA 212.4 1 viol. ✓ Clean c1nc(c2c(n1)n(cn2)[C@H]3C[C@@H]([C@H](O3)CO[P@]…
DCP RCSB PDB Q08698 467.2 Da LogP -1.18 TPSA 250.2 2 viol. ✓ Clean C1[C@@H]([C@H](O[C@H]1N2C=CC(=NC2=O)N)CO[P@@](=…
DGT RCSB PDB P00452 507.2 Da LogP -1.31 TPSA 278.9 3 viol. ✓ Clean c1nc2c(n1[C@H]3C[C@@H]([C@H](O3)CO[P@@](=O)(O)O…
DTP RCSB PDB P00452 491.2 Da LogP -0.60 TPSA 258.9 2 viol. ✓ Clean c1nc(c2c(n1)n(cn2)[C@H]3C[C@@H]([C@H](O3)CO[P@]…
E4X RCSB PDB P23921 488.4 Da LogP 4.10 TPSA 105.1 ✓ Ro5 ✓ Clean C[C@H](c1cccc2c1cccc2)[C@@H](C3=NNC(=O)O3)NS(=O…
E6O RCSB PDB P23921 476.9 Da LogP 2.43 TPSA 148.2 ✓ Ro5 ✓ Clean C[C@H](c1cccc2c1CCC2)[C@@H](C3=NNC(=O)O3)NS(=O)…
EJ6 RCSB PDB P23921 511.0 Da LogP 3.42 TPSA 117.5 1 viol. ✓ Clean Cc1ccc(c(c1C)[C@@H](C)[C@@H](C2=NNC(=O)O2)NS(=O…
FEO RCSB PDB P00452 127.7 Da LogP -0.07 TPSA 9.2 ✓ Ro5 ✓ Clean O([Fe])[Fe]
GCQ RCSB PDB P21524 423.2 Da LogP -1.05 TPSA 203.7 ✓ Ro5 ✓ Clean C1=CN(C(=O)N=C1N)[C@H]2C([C@@H]([C@H](O2)CO[P@]…
MRT RCSB PDB P21524 1031.2 Da LogP 4.98 TPSA 286.9 3 viol. ✓ Clean CC(C)C[C@@H](C(=O)N[C@@H](CC(=O)O)C(=O)N[C@@H](…
N5P RCSB PDB P21524 518.2 Da LogP 1.54 TPSA 237.3 2 viol. ✓ Clean c1cc2c(ccn2C3CC(C(O3)COP(=O)(O)OP(=O)(O)OP(=O)(…
TTP RCSB PDB P00452 482.2 Da LogP -1.16 TPSA 244.1 2 viol. ✓ Clean CC1=CN(C(=O)NC1=O)[C@H]2C[C@@H]([C@H](O2)CO[P@]…

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.