Protein profile

PA4934

30S ribosomal protein S18

Genome: NC_002516.2

Gene: rpsR PA4934 Structure source: AlphaFold UniProt Q9HUN0

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Amino acids 76

Annotations 5

Features 23

PDB binders 8

Overview

Basic information about this protein and its source genome.

Accession: PA4934
Assembly: Pseudomonas aeruginosa PAO1, complete genome
Gene: rpsR PA4934
Status: annotated
Amino acids: 76
Structure source: AlphaFold

GO:0022627 The small subunit of a ribosome located in the cytosol. GO:0070181 Binding to small ribosomal subunit RNA (SSU rRNA), a constituent of the small ribosomal subunit. In S. cerevisiae, this is the 18S rRNA. GO:0003735 The action of a molecule that contributes to the structural integrity of the ribosome. 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: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.

Target profile

Computed evidence for target prioritization.

Human off-target: hit
Human identity (%): 40.741
Human E-value: 2.92e-06
Gut microbiome off-target: hit
Essential (DEG): Y
Localization: Cytoplasmic

Sequence

Primary amino-acid sequence viewer.

Functional Annotations

Enzyme classification and Gene Ontology terms linked to this protein.

5 GO

Gene Ontology (GO)

GO:0022627 The small subunit of a ribosome located in the cytosol.
GO:0070181 Binding to small ribosomal subunit RNA (SSU rRNA), a constituent of the small ribosomal subunit. In S. cerevisiae, this is the 18S rRNA.
GO:0003735 The action of a molecule that contributes to the structural integrity of the ribosome.
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: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.

Sequence Features

Domain/signature hits from InterPro and related databases.

23 records

Show feature table

Start	End	DB	Term	Name
8	72	PANTHER	PTHR13479	30S RIBOSOMAL PROTEIN S18
8	72	InterPro	IPR001648	Ribosomal protein S18
1	74	FunFam	G3DSA:4.10.640.10:FF:000001	30S ribosomal protein S18
21	44	ProSitePatterns	PS00057	Ribosomal protein S18 signature.
21	44	InterPro	IPR018275	Ribosomal protein S18, conserved site
2	73	Hamap	MF_00270	30S ribosomal protein S18 [rpsR].
2	73	InterPro	IPR001648	Ribosomal protein S18
18	68	Pfam	PF01084	Ribosomal protein S18
18	68	InterPro	IPR001648	Ribosomal protein S18
1	74	Gene3D	G3DSA:4.10.640.10	Ribosomal protein S18
1	74	InterPro	IPR036870	Ribosomal protein S18 superfamily
28	38	PRINTS	PR00974	Ribosomal protein S18 family signature
28	38	InterPro	IPR001648	Ribosomal protein S18
60	70	PRINTS	PR00974	Ribosomal protein S18 family signature
60	70	InterPro	IPR001648	Ribosomal protein S18
38	45	PRINTS	PR00974	Ribosomal protein S18 family signature
38	45	InterPro	IPR001648	Ribosomal protein S18
46	60	PRINTS	PR00974	Ribosomal protein S18 family signature
46	60	InterPro	IPR001648	Ribosomal protein S18
4	72	NCBIfam	TIGR00165	30S ribosomal protein S18
4	72	InterPro	IPR001648	Ribosomal protein S18
3	74	SUPERFAMILY	SSF46911	Ribosomal protein S18
3	74	InterPro	IPR036870	Ribosomal protein S18 superfamily

3D Structure

Selected loaded structure. Experimental PDB entries may cover only a portion of the sequence; predicted models typically cover the full protein.

No pockets are loaded yet for the displayed AlphaFold model PA4934 structure. Run experimental pocket backfill to show FPocket/P2Rank overlays on this structure.

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Structural evidence

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Experimental PDB entries and predicted models. Click Switch to display a different structure in the viewer.

Entry	Method	Resolution	Chain	Coverage	Links	Status
AlphaFold PA4934	AlphaFold	—	—	full sequence	—	Viewing

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.

62 records

Highest-confidence structural evidence: ligands co-crystallized with this exact protein. If the source PDB is loaded in TPW, use Open crystal to inspect it in the structure viewer.

No PDB structure with a co-crystallized ligand found for this exact protein.

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.

Ligand	Source crystal	UniProt (homolog)	MW · LogP · TPSA	Lipinski	PAINS	SMILES
AM2	4AQY	Q5SLQ0	539.6 Da LogP -6.95 TPSA 283.6	3 viol.	✓ Clean	`CN[C@H]1[C@H]([C@@H]2[C@H](C[C@H]([C@H](O2)O[C@…`
C	6CAO	Q5SLQ0	323.2 Da LogP -2.45 TPSA 177.4	✓ Ro5	✓ Clean	`C1=CN(C(=O)N=C1N)[C@H]2[C@@H]([C@@H]([C@H](O2)C…`
FES	6RW4	Q9Y3D5	175.8 Da LogP 1.29 TPSA 0.0	✓ Ro5	✓ Clean	`S1[Fe]S[Fe]1`
GNP	6RW5	Q9Y3D5	522.2 Da LogP -2.76 TPSA 301.9	3 viol.	✓ Clean	`c1nc2c(n1[C@H]3[C@@H]([C@@H]([C@H](O3)CO[P@](=O…`
PAR	4X62	Q5SLQ0	615.6 Da LogP -8.86 TPSA 347.3	3 viol.	✓ Clean	`C1[C@H]([C@@H]([C@H]([C@@H]([C@H]1N)O[C@@H]2[C@…`
SRY	6RW4	Q9Y3D5	581.6 Da LogP -7.74 TPSA 331.4	3 viol.	✓ Clean	`[H]/N=C(/N)\N[C@@H]1[C@H]([C@@H]([C@H]([C@@H]([…`
TAC	1I97	Q5SLQ0	444.4 Da LogP -0.21 TPSA 181.6	1 viol.	✓ Clean	`C[C@]1(c2cccc(c2C(=O)C3=C([C@]4([C@@H](C[C@@H]3…`
WO2	1I94	Q5SLQ0	—	—	—	`[O][W]1234O[W]567(O[W]89%10(O5[P]5%11O%12[W]%13…`

Experimental bioactivity from ChEMBL measured directly on this protein. Score = pchembl (−log Ki/IC₅₀; higher = more potent).

No ChEMBL bioactivity data found for this exact protein.

Bioactivity inferred from similar proteins in ChEMBL. Score = pchembl (−log Ki/IC₅₀; higher = more potent).

Ligand	UniProt (homolog)	pchembl	MW · LogP · TPSA	Lipinski	PAINS	SMILES
08D	P0A7T7	—	253.3 Da LogP 1.37 TPSA 98.2	✓ Ro5	✓ Clean	`Cc1cc(no1)NS(=O)(=O)c2ccc(cc2)N`
4AX	P0A7T7	—	102.1 Da LogP -1.62 TPSA 64.3	✓ Ro5	✓ Clean	`C1[C@H](C(=O)NO1)N`
SCM	P0A7T7	—	332.4 Da LogP -2.93 TPSA 129.5	✓ Ro5	✓ Clean	`C[C@@H]1CC(=O)[C@]2([C@@H](O1)O[C@@H]3[C@H]([C@…`
TOP	P0A7T7	—	290.3 Da LogP 1.26 TPSA 105.5	✓ Ro5	✓ Clean	`COc1cc(cc(c1OC)OC)Cc2cnc(nc2N)N`

Proposed virtual-screening candidates from ZINC. Score = Tanimoto similarity to a known binder (0–1; higher = more similar).

Ligand	Tanimoto	MW · LogP · TPSA	Lipinski	PAINS	SMILES
ZINC11525121	1.000	444.4 Da LogP -0.21 TPSA 181.6	1 viol.	✓ Clean	`CN(C)[C@@H]1C(O)=C(C(N)=O)C(=O)[C@]2(O)C(O)=C3C…`
ZINC1532524	1.000	323.2 Da LogP -2.45 TPSA 177.4	✓ Ro5	✓ Clean	`Nc1ccn([C@H]2O[C@@H](COP(=O)(O)O)[C@H](O)[C@@H]…`
ZINC16546001	1.000	323.2 Da LogP -2.45 TPSA 177.4	✓ Ro5	✓ Clean	`Nc1ccn([C@@H]2O[C@H](COP(=O)(O)O)[C@H](O)[C@@H]…`
ZINC1785780	1.000	323.2 Da LogP -2.45 TPSA 177.4	✓ Ro5	✓ Clean	`Nc1ccn([C@@H]2O[C@H](COP(=O)(O)O)[C@@H](O)[C@@H…`
ZINC1785781	1.000	323.2 Da LogP -2.45 TPSA 177.4	✓ Ro5	✓ Clean	`Nc1ccn([C@H]2O[C@H](COP(=O)(O)O)[C@@H](O)[C@@H]…`
ZINC18202167	1.000	444.4 Da LogP -0.21 TPSA 181.6	1 viol.	✓ Clean	`CN(C)[C@@H]1C(O)=C(C(N)=O)C(=O)[C@@]2(O)C(O)=C3…`
ZINC20410403	1.000	444.4 Da LogP -0.21 TPSA 181.6	1 viol.	✓ Clean	`CN(C)[C@@H]1C(O)=C(C(N)=O)C(=O)[C@@]2(O)C(O)=C3…`
ZINC21984166	1.000	444.4 Da LogP -0.21 TPSA 181.6	1 viol.	✓ Clean	`CN(C)[C@@H]1C(O)=C(C(N)=O)C(=O)[C@@]2(O)C(O)=C3…`
ZINC239173596	1.000	444.4 Da LogP -0.21 TPSA 181.6	1 viol.	✓ Clean	`CN(C)[C@@H]1C(O)=C(C(N)=O)C(=O)[C@]2(O)C(O)=C3C…`
ZINC239248067	1.000	539.6 Da LogP -6.95 TPSA 283.6	3 viol.	✓ Clean	`CN[C@@H]1[C@H](O[C@@H]2O[C@H](CO)[C@H](N)[C@H](…`
ZINC239248068	1.000	539.6 Da LogP -6.95 TPSA 283.6	3 viol.	✓ Clean	`CN[C@@H]1[C@H](O[C@@H]2O[C@H](CO)[C@H](N)[C@H](…`
ZINC239248069	1.000	539.6 Da LogP -6.95 TPSA 283.6	3 viol.	✓ Clean	`CN[C@@H]1[C@H](O[C@@H]2O[C@H](CO)[C@H](N)[C@H](…`
ZINC239248070	1.000	539.6 Da LogP -6.95 TPSA 283.6	3 viol.	✓ Clean	`CN[C@@H]1[C@H](O[C@@H]2O[C@H](CO)[C@H](N)[C@H](…`
ZINC245256945	1.000	332.4 Da LogP -2.93 TPSA 129.5	✓ Ro5	✓ Clean	`CN[C@H]1[C@@H](O)[C@@H](NC)[C@@H](O)[C@H]2O[C@H…`
ZINC245256946	1.000	332.4 Da LogP -2.93 TPSA 129.5	✓ Ro5	✓ Clean	`CN[C@@H]1[C@@H]2O[C@]3(O)C(=O)C[C@H](C)O[C@@H]3…`
ZINC245256947	1.000	332.4 Da LogP -2.93 TPSA 129.5	✓ Ro5	✓ Clean	`CN[C@@H]1[C@@H]2O[C@]3(O)C(=O)C[C@H](C)O[C@@H]3…`
ZINC245256948	1.000	332.4 Da LogP -2.93 TPSA 129.5	✓ Ro5	✓ Clean	`CN[C@H]1[C@@H](O)[C@@H](NC)[C@H](O)[C@H]2O[C@H]…`
ZINC3861744	1.000	323.2 Da LogP -2.45 TPSA 177.4	✓ Ro5	✓ Clean	`Nc1ccn([C@@H]2O[C@H](COP(=O)(O)O)[C@@H](O)[C@H]…`
ZINC3869480	1.000	323.2 Da LogP -2.45 TPSA 177.4	✓ Ro5	✓ Clean	`Nc1ccn([C@H]2O[C@@H](COP(=O)(O)O)[C@@H](O)[C@H]…`
ZINC3869481	1.000	323.2 Da LogP -2.45 TPSA 177.4	✓ Ro5	✓ Clean	`Nc1ccn([C@@H]2O[C@@H](COP(=O)(O)O)[C@@H](O)[C@H…`
ZINC3869482	1.000	323.2 Da LogP -2.45 TPSA 177.4	✓ Ro5	✓ Clean	`Nc1ccn([C@H]2O[C@@H](COP(=O)(O)O)[C@@H](O)[C@@H…`
ZINC3869483	1.000	323.2 Da LogP -2.45 TPSA 177.4	✓ Ro5	✓ Clean	`Nc1ccn([C@@H]2O[C@@H](COP(=O)(O)O)[C@@H](O)[C@@…`
ZINC3954230	1.000	323.2 Da LogP -2.45 TPSA 177.4	✓ Ro5	✓ Clean	`Nc1ccn([C@H]2O[C@@H](COP(=O)(O)O)[C@H](O)[C@H]2…`
ZINC4059755	1.000	444.4 Da LogP -0.21 TPSA 181.6	1 viol.	✓ Clean	`CN(C)[C@@H]1C(O)=C(C(N)=O)C(=O)[C@]2(O)C(O)=C3C…`
ZINC4215819	1.000	444.4 Da LogP -0.21 TPSA 181.6	1 viol.	✓ Clean	`CN(C)[C@H]1C(O)=C(C(N)=O)C(=O)[C@@]2(O)C(O)=C3C…`
ZINC43771554	1.000	444.4 Da LogP -0.21 TPSA 181.6	1 viol.	✓ Clean	`CN(C)[C@@H]1C(O)=C(C(N)=O)C(=O)[C@]2(O)C(O)=C3C…`
ZINC4807269	1.000	444.4 Da LogP -0.21 TPSA 181.6	1 viol.	✓ Clean	`CN(C)[C@@H]1C(O)=C(C(N)=O)C(=O)[C@@]2(O)C(O)=C3…`
ZINC5273778	1.000	332.4 Da LogP -2.93 TPSA 129.5	✓ Ro5	✓ Clean	`CN[C@@H]1[C@@H](O)[C@@H]2O[C@H]3O[C@@H](C)CC(=O…`
ZINC53006806	1.000	332.4 Da LogP -2.93 TPSA 129.5	✓ Ro5	✓ Clean	`CN[C@H]1[C@@H](O)[C@@H](NC)[C@H](O)[C@H]2O[C@@H…`
ZINC57406608	1.000	332.4 Da LogP -2.93 TPSA 129.5	✓ Ro5	✓ Clean	`CN[C@H]1[C@@H](O)[C@@H](NC)[C@@H](O)[C@H]2O[C@@…`
ZINC57406609	1.000	332.4 Da LogP -2.93 TPSA 129.5	✓ Ro5	✓ Clean	`CN[C@H]1[C@@H](O)[C@@H](NC)[C@@H](O)[C@H]2O[C@@…`
ZINC57406610	1.000	332.4 Da LogP -2.93 TPSA 129.5	✓ Ro5	✓ Clean	`CN[C@H]1[C@@H](O)[C@@H](NC)[C@@H](O)[C@H]2O[C@@…`
ZINC57406611	1.000	332.4 Da LogP -2.93 TPSA 129.5	✓ Ro5	✓ Clean	`CN[C@H]1[C@@H](O)[C@@H](NC)[C@@H](O)[C@H]2O[C@@…`
ZINC575338663	1.000	444.4 Da LogP -0.21 TPSA 181.6	1 viol.	✓ Clean	`CN(C)[C@H]1C(O)=C(C(N)=O)C(=O)[C@]2(O)C(O)=C3C(…`
ZINC6627681	1.000	290.3 Da LogP 1.26 TPSA 105.5	✓ Ro5	✓ Clean	`COc1cc(Cc2cnc(N)nc2N)cc(OC)c1OC`
ZINC71789713	1.000	332.4 Da LogP -2.93 TPSA 129.5	✓ Ro5	✓ Clean	`CN[C@@H]1[C@H](O)[C@H]2O[C@@H]3O[C@@H](C)CC(=O)…`
ZINC71789714	1.000	332.4 Da LogP -2.93 TPSA 129.5	✓ Ro5	✓ Clean	`CN[C@@H]1[C@H](O)[C@H]2O[C@H]3O[C@@H](C)CC(=O)[…`
ZINC71789715	1.000	332.4 Da LogP -2.93 TPSA 129.5	✓ Ro5	✓ Clean	`CN[C@@H]1[C@H](O)[C@H]2O[C@@H]3O[C@@H](C)CC(=O)…`
ZINC71789716	1.000	332.4 Da LogP -2.93 TPSA 129.5	✓ Ro5	✓ Clean	`CN[C@@H]1[C@H](O)[C@H]2O[C@H]3O[C@@H](C)CC(=O)[…`
ZINC84441937	1.000	444.4 Da LogP -0.21 TPSA 181.6	1 viol.	✓ Clean	`CN(C)[C@@H]1C(O)=C(C(N)=O)C(=O)[C@@]2(O)C(O)=C3…`
ZINC8613159	1.000	323.2 Da LogP -2.45 TPSA 177.4	✓ Ro5	✓ Clean	`Nc1ccn([C@@H]2O[C@H](COP(=O)(O)O)[C@H](O)[C@H]2…`
ZINC8952080	1.000	323.2 Da LogP -2.45 TPSA 177.4	✓ Ro5	✓ Clean	`Nc1ccn([C@@H]2O[C@@H](COP(=O)(O)O)[C@H](O)[C@@H…`
ZINC89763	1.000	253.3 Da LogP 1.37 TPSA 98.2	✓ Ro5	✓ Clean	`Cc1cc(NS(=O)(=O)c2ccc(N)cc2)no1`
ZINC9007749	1.000	323.2 Da LogP -2.45 TPSA 177.4	✓ Ro5	✓ Clean	`Nc1ccn([C@@H]2O[C@@H](COP(=O)(O)O)[C@H](O)[C@H]…`
ZINC100052153	0.905	454.5 Da LogP -6.65 TPSA 262.4	2 viol.	✓ Clean	`NC[C@H]1O[C@H](O[C@@H]2[C@@H](N)C[C@@H](N)[C@H]…`
ZINC100223147	0.905	454.5 Da LogP -6.65 TPSA 262.4	2 viol.	✓ Clean	`NC[C@@H]1O[C@@H](O[C@@H]2[C@@H](O[C@@H]3O[C@H](…`
ZINC242575106	0.905	454.5 Da LogP -6.65 TPSA 262.4	2 viol.	✓ Clean	`NC[C@@H]1O[C@H](O[C@H]2[C@@H](O[C@@H]3O[C@H](CO…`
ZINC242575107	0.905	454.5 Da LogP -6.65 TPSA 262.4	2 viol.	✓ Clean	`NC[C@@H]1O[C@H](O[C@H]2[C@@H](O[C@@H]3O[C@H](CO…`
ZINC242575109	0.905	454.5 Da LogP -6.65 TPSA 262.4	2 viol.	✓ Clean	`NC[C@@H]1O[C@H](O[C@H]2[C@@H](O[C@@H]3O[C@H](CO…`
ZINC43664297	0.905	454.5 Da LogP -6.65 TPSA 262.4	2 viol.	✓ Clean	`NC[C@@H]1O[C@H](O[C@H]2[C@@H](O[C@H]3O[C@@H](CO…`

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.