Protein target profile

KP13_00750

50S ribosomal protein L4

Genome: KpKP13 Gene: AHE42367.1 rplD 3D evidence: AlphaFold DB model + ColabFold model UniProt A0A0H3GU26
Length 201
Pocket druggability 0.261
Direct ligand evidence 0 57 total records
Functional annotation 0 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 (%)
56.14 Lower values reduce human off-target concern.
Human E-value
3.53e-14
Gut microbiome similarity
5.1% of screened genomes Lower prevalence suggests narrower overlap with the screened gut microbiome.

Essentiality

Essential (DEG)
Y
DEG identity (%)
99.005 Higher values support similarity to known essential genes.
DEG E-value
8.699999999999999e-147 Smaller values mean stronger essential-gene similarity.

Localization

Localization
Cytoplasmic

Structure confidence

ColabFold pLDDT
95.43 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 0.261
Structure A0A0H3GU26
Pocket Pocket 2
P2Rank 0.007
Structure A0A0H3GU26
Pocket Pocket 1
ColabFold model
FPocket 0.292 · Pocket 4
P2Rank 0.014 · Pocket 1
Core conservation Conserved core gene
Roary core
CoreCruncher core
Gut microbiome 240 / 4744 genomes with a hit
Prevalence 5.1%

Cross-references

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

Sequence

Primary amino-acid sequence viewer.

MELVLKDAQSALTVSETTFGRDFNEALVHQVVVAYAAGARQGTRAQKTRAEITGSGKKPWRQKGTGRARSGSIKSPIWRSGGVTFAARPQDHSQKVNKKMYRGALKSILSELVRQDRLIVVEKFSVEAPKTKLLAQKLKDMALEDVLIITGELDENLFLAARNLHKVDVRDANGIDPVSLIAFDKVVMTADAVKQVEEMLA

Functional annotations

Enzyme classification and Gene Ontology terms linked to this protein.

5 GO

Gene Ontology (GO)

5
  • GO:0003735 The action of a molecule that contributes to the structural integrity of the ribosome.
  • GO:0005840 An intracellular organelle, about 200 A in diameter, consisting of RNA and protein. It is the site of protein biosynthesis resulting from translation of messenger RNA (mRNA). It consists of two subunits, one large and one small, each containing only protein and RNA. Both the ribosome and its subunits are characterized by their sedimentation coefficients, expressed in Svedberg units (symbol: S). Hence, the prokaryotic ribosome (70S) comprises a large (50S) subunit and a small (30S) subunit, while the eukaryotic ribosome (80S) comprises a large (60S) subunit and a small (40S) subunit. Two sites on the ribosomal large subunit are involved in translation, namely the aminoacyl site (A site) and peptidyl site (P site). Ribosomes from prokaryotes, eukaryotes, mitochondria, and chloroplasts have characteristically distinct ribosomal proteins.
  • GO:0006412 The cellular metabolic process in which a protein is formed, using the sequence of a mature mRNA or circRNA molecule to specify the sequence of amino acids in a polypeptide chain. Translation is mediated by the ribosome, and begins with the formation of a ternary complex between aminoacylated initiator methionine tRNA, GTP, and initiation factor 2, which subsequently associates with the small subunit of the ribosome and an mRNA or circRNA. Translation ends with the release of a polypeptide chain from the ribosome.
  • GO:1990904 A macromolecular complex that contains both RNA and protein molecules.
  • GO:0019843 Binding to a ribosomal RNA.

Sequence domains and features

Domain and signature matches imported from InterPro and related databases.

13 records
Show feature table
Start End DB Term Name
1 201 Gene3D G3DSA:3.40.1370.10 -
1 201 InterPro IPR023574 Ribosomal protein L4 domain superfamily
10 200 PANTHER PTHR10746 50S RIBOSOMAL PROTEIN L4
10 200 InterPro IPR013005 50S ribosomal protein uL4
10 200 SUPERFAMILY SSF52166 Ribosomal protein L4
10 200 InterPro IPR023574 Ribosomal protein L4 domain superfamily
6 201 Hamap MF_01328_B 50S ribosomal protein L4 [rplD].
6 201 InterPro IPR013005 50S ribosomal protein uL4
1 201 FunFam G3DSA:3.40.1370.10:FF:000001 50S ribosomal protein L4
13 198 NCBIfam TIGR03953 50S ribosomal protein L4
13 198 InterPro IPR013005 50S ribosomal protein uL4
13 198 Pfam PF00573 Ribosomal protein L4/L1 family
13 198 InterPro IPR002136 Ribosomal protein L4/L1e

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 · FPocket

Druggability: high ≥ 0.7 · medium 0.4–0.69 · low < 0.4

Site 1 FPocket #2
0.261
Show in viewer
Surrounding area

Binding pockets · P2Rank

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

Site 1 P2Rank #1
0.007
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_A0A0H3GU26
AlphaFold DB full sequence Viewing
ColabFold KP13_00750
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.

57 records
Chemistry signal

Structural ligand evidence is available for this target.

Direct evidence 0 same-protein records
Transferred evidence 7 records from similar proteins
Structural ligands 7 0 loaded crystals
Measured bioactivity 0 direct and transferred ChEMBL records
Proposed compounds 50 similarity-based ZINC candidates
Best available ligand signal
5MU PDB via homolog 338.2 Da · LogP -2.43 · TPSA 171.3 Open detail RCSB PDB
FSD PDB via homolog Detail RCSB PDB
LUJ PDB via homolog Detail RCSB PDB
O PDB via homolog Detail RCSB PDB
OHX 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
5MU RCSB PDB Q5SHN9 338.2 Da LogP -2.43 TPSA 171.3 ✓ Ro5 ✓ Clean CC1=CN(C(=O)NC1=O)[C@H]2[C@@H]([C@@H]([C@H](O2)…
FSD RCSB PDB Q5SHN9 618.7 Da LogP -0.38 TPSA 210.7 3 viol. ✓ Clean C[C@@H]1[C@H](CC[C@@H](O1)N2C=CC(=NC2=O)NC(=O)c…
LUJ RCSB PDB Q5SHN9 641.7 Da LogP -6.81 TPSA 327.1 3 viol. ✓ Clean CCC[C@@H]1[C@H](O[C@@H]([C@@H]([C@H]1O)N)O[C@@H…
O RCSB PDB Q2FW07 18.0 Da LogP -0.82 TPSA 31.5 ✓ Ro5 ✓ Clean O
OHX RCSB PDB Q5SHN9 286.4 Da LogP -3.55 TPSA 156.1 1 viol. ✓ Clean N[Os](N)(N)(N)(N)N
PSU RCSB PDB Q5SHN9 324.2 Da LogP -2.67 TPSA 182.2 1 viol. ✓ Clean C1=C(C(=O)NC(=O)N1)[C@H]2[C@@H]([C@@H]([C@H](O2…
SPD RCSB PDB Q2FW07 145.2 Da LogP -0.34 TPSA 64.1 ✓ Ro5 ✓ Clean C(CCNCCCN)CN

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.