Protein profile

PA4740

polynucleotide phosphorylase

Genome: NC_002516.2

Gene: PA4740 pnp Structure source: AlphaFold UniProt Q9HV59

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Amino acids 701

Annotations 10

Features 57

PDB binders 4

Druggability 0.215

Overview

Basic information about this protein and its source genome.

Accession: PA4740
Assembly: Pseudomonas aeruginosa PAO1, complete genome
Gene: PA4740 pnp
Status: annotated
Amino acids: 701
Structure source: AlphaFold

2.7.7.8

GO:0005829 The part of the cytoplasm that does not contain organelles but which does contain other particulate matter, such as protein complexes. GO:0000175 Catalysis of the sequential cleavage of mononucleotides from a free 3' terminus of an RNA molecule. GO:0000287 Binding to a magnesium (Mg) ion. GO:0004654 Catalysis of the reaction: RNA(n+1) + phosphate = RNA(n) + a nucleoside diphosphate. GO:0003723 Binding to an RNA molecule or a portion thereof. GO:0006402 The chemical reactions and pathways resulting in the breakdown of mRNA, messenger RNA, which is responsible for carrying the coded genetic 'message', transcribed from DNA, to sites of protein assembly at the ribosomes.

Target profile

Computed evidence for target prioritization.

Human off-target: hit
Human identity (%): 44.304
Human E-value: 1.46e-06
Gut microbiome off-target: hit
Essential (DEG): Y
Localization: Cytoplasmic

Selected Druggability evidence

Selected Druggability is the FPocket score chosen for ranking using the curated structure priority. The 3D viewer may show a different loaded structure, so its visible pockets can differ.

FPocket 0.215

Structure –

Pocket –

Sequence

Primary amino-acid sequence viewer.

Functional Annotations

Enzyme classification and Gene Ontology terms linked to this protein.

1 EC 9 GO

Enzyme Commission (EC)

2.7.7.8

Gene Ontology (GO)

GO:0005829 The part of the cytoplasm that does not contain organelles but which does contain other particulate matter, such as protein complexes.
GO:0000175 Catalysis of the sequential cleavage of mononucleotides from a free 3' terminus of an RNA molecule.
GO:0000287 Binding to a magnesium (Mg) ion.
GO:0004654 Catalysis of the reaction: RNA(n+1) + phosphate = RNA(n) + a nucleoside diphosphate.
GO:0003723 Binding to an RNA molecule or a portion thereof.
GO:0006402 The chemical reactions and pathways resulting in the breakdown of mRNA, messenger RNA, which is responsible for carrying the coded genetic 'message', transcribed from DNA, to sites of protein assembly at the ribosomes.
GO:0006401 The chemical reactions and pathways resulting in the breakdown of RNA, ribonucleic acid, one of the two main type of nucleic acid, consisting of a long, unbranched macromolecule formed from ribonucleotides joined in 3',5'-phosphodiester linkage.
GO:0006396 Any process involved in the conversion of one or more primary RNA transcripts into one or more mature RNA molecules.
GO:0003676 Binding to a nucleic acid.

Sequence Features

Domain/signature hits from InterPro and related databases.

57 records

Show feature table

Start	End	DB	Term	Name
144	235	SUPERFAMILY	SSF55666	Ribonuclease PH domain 2-like
144	235	InterPro	IPR036345	Exoribonuclease, PH domain 2 superfamily
5	233	CDD	cd11363	RNase_PH_PNPase_1
1	234	Gene3D	G3DSA:3.30.230.70	-
1	234	InterPro	IPR027408	PNPase/RNase PH domain superfamily
551	622	Gene3D	G3DSA:3.30.1370.10	K Homology domain, type 1
551	622	InterPro	IPR036612	K Homology domain, type 1 superfamily
236	550	FunFam	G3DSA:3.30.230.70:FF:000002	Polyribonucleotide nucleotidyltransferase
554	613	ProSiteProfiles	PS50084	Type-1 KH domain profile.
235	550	Gene3D	G3DSA:3.30.230.70	-
235	550	InterPro	IPR027408	PNPase/RNase PH domain superfamily
242	321	Pfam	PF03726	Polyribonucleotide nucleotidyltransferase, RNA binding domain
242	321	InterPro	IPR015848	Polyribonucleotide nucleotidyltransferase, RNA-binding domain
552	621	CDD	cd02393	KH-I_PNPase
623	690	CDD	cd04472	S1_PNPase
324	545	CDD	cd11364	RNase_PH_PNPase_2
615	693	SUPERFAMILY	SSF50249	Nucleic acid-binding proteins
615	693	InterPro	IPR012340	Nucleic acid-binding, OB-fold
2	694	Hamap	MF_01595	Polyribonucleotide nucleotidyltransferase [pnp].
2	694	InterPro	IPR012162	Polyribonucleotide nucleotidyltransferase
2	234	FunFam	G3DSA:3.30.230.70:FF:000001	Polyribonucleotide nucleotidyltransferase
556	641	SUPERFAMILY	SSF54791	Eukaryotic type KH-domain (KH-domain type I)
556	641	InterPro	IPR036612	K Homology domain, type 1 superfamily
551	619	FunFam	G3DSA:3.30.1370.10:FF:000001	Polyribonucleotide nucleotidyltransferase
1	700	PIRSF	PIRSF005499	PNPase
1	700	InterPro	IPR012162	Polyribonucleotide nucleotidyltransferase
3	143	SUPERFAMILY	SSF54211	Ribosomal protein S5 domain 2-like
3	143	InterPro	IPR020568	Ribosomal protein S5 domain 2-type fold
621	691	SMART	SM00316	S1_6
621	691	InterPro	IPR022967	RNA-binding domain, S1
553	618	SMART	SM00322	kh_6
553	618	InterPro	IPR004087	K Homology domain
2	695	PANTHER	PTHR11252	POLYRIBONUCLEOTIDE NUCLEOTIDYLTRANSFERASE
2	695	InterPro	IPR012162	Polyribonucleotide nucleotidyltransferase
451	550	SUPERFAMILY	SSF55666	Ribonuclease PH domain 2-like
451	550	InterPro	IPR036345	Exoribonuclease, PH domain 2 superfamily
623	691	ProSiteProfiles	PS50126	S1 domain profile.
623	691	InterPro	IPR003029	S1 domain
460	529	Pfam	PF03725	3' exoribonuclease family, domain 2
460	529	InterPro	IPR015847	Exoribonuclease, phosphorolytic domain 2
146	210	Pfam	PF03725	3' exoribonuclease family, domain 2
146	210	InterPro	IPR015847	Exoribonuclease, phosphorolytic domain 2
293	489	SUPERFAMILY	SSF54211	Ribosomal protein S5 domain 2-like
293	489	InterPro	IPR020568	Ribosomal protein S5 domain 2-type fold
623	694	Gene3D	G3DSA:2.40.50.140	-
623	694	InterPro	IPR012340	Nucleic acid-binding, OB-fold
620	691	Pfam	PF00575	S1 RNA binding domain
620	691	InterPro	IPR003029	S1 domain
325	457	Pfam	PF01138	3' exoribonuclease family, domain 1
325	457	InterPro	IPR001247	Exoribonuclease, phosphorolytic domain 1
15	143	Pfam	PF01138	3' exoribonuclease family, domain 1
15	143	InterPro	IPR001247	Exoribonuclease, phosphorolytic domain 1
623	693	FunFam	G3DSA:2.40.50.140:FF:000023	Polyribonucleotide nucleotidyltransferase
9	692	NCBIfam	TIGR03591	polyribonucleotide nucleotidyltransferase
9	692	InterPro	IPR012162	Polyribonucleotide nucleotidyltransferase
558	613	Pfam	PF00013	KH domain
558	613	InterPro	IPR004088	K Homology domain, type 1

3D Structure

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

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Structural evidence

0 + 1

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

Entry	Method	Resolution	Chain	Coverage	Links	Status
AlphaFold PA4740	AlphaFold	—	—	full sequence	—	Viewing

Pocket details FPocket · P2Rank — toggle visibility and zoom from here, or open full viewer

Pockets (FPOCKET)

Showing top-ranked FPocket candidates by druggability. Druggability is color-coded: high (0.7 or higher), medium (0.4 to 0.69), low (below 0.4).

FPOCKET	Sticks	Spheres	Surfaces	Druggability	Labels	Zoom	Positions
2				0.215

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.

54 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
5GP	3GCM	A7ZS61	363.2 Da LogP -2.57 TPSA 206.0	1 viol.	✓ Clean	`c1nc2c(n1[C@H]3[C@@H]([C@@H]([C@H](O3)COP(=O)(O…`
FLC	3GCM	A7ZS61	189.1 Da LogP -5.25 TPSA 140.6	✓ Ro5	✓ Clean	`C(C(=O)[O-])C(CC(=O)[O-])(C(=O)[O-])O`
PPV	5XEX	Q2FZ20	178.0 Da LogP -0.81 TPSA 124.3	✓ Ro5	✓ Clean	`OP(=O)(O)OP(=O)(O)O`
WO4	3H1C	P05055	247.8 Da LogP -2.62 TPSA 80.3	✓ Ro5	✓ Clean	`[O-][W](=O)(=O)[O-]`

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).

No ChEMBL hits found through similar proteins.

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
ZINC12501413	1.000	363.2 Da LogP -2.57 TPSA 206.0	1 viol.	✓ Clean	`Nc1nc2c(ncn2[C@@H]2O[C@H](COP(=O)(O)O)[C@@H](O)…`
ZINC12958448	1.000	363.2 Da LogP -2.57 TPSA 206.0	1 viol.	✓ Clean	`Nc1nc2c(ncn2[C@@H]2O[C@H](COP(=O)(O)O)[C@H](O)[…`
ZINC1532555	1.000	363.2 Da LogP -2.57 TPSA 206.0	1 viol.	✓ Clean	`Nc1nc2c(ncn2[C@H]2O[C@@H](COP(=O)(O)O)[C@H](O)[…`
ZINC16546189	1.000	363.2 Da LogP -2.57 TPSA 206.0	1 viol.	✓ Clean	`Nc1nc2c(ncn2[C@@H]2O[C@H](COP(=O)(O)O)[C@H](O)[…`
ZINC2159505	1.000	363.2 Da LogP -2.57 TPSA 206.0	1 viol.	✓ Clean	`Nc1nc2c(ncn2[C@@H]2O[C@H](COP(=O)(O)O)[C@@H](O)…`
ZINC3073318	1.000	363.2 Da LogP -2.57 TPSA 206.0	1 viol.	✓ Clean	`Nc1nc2c(ncn2[C@H]2O[C@@H](COP(=O)(O)O)[C@@H](O)…`
ZINC3869963	1.000	363.2 Da LogP -2.57 TPSA 206.0	1 viol.	✓ Clean	`Nc1nc2c(ncn2[C@H]2O[C@@H](COP(=O)(O)O)[C@@H](O)…`
ZINC3869965	1.000	363.2 Da LogP -2.57 TPSA 206.0	1 viol.	✓ Clean	`Nc1nc2c(ncn2[C@@H]2O[C@@H](COP(=O)(O)O)[C@@H](O…`
ZINC9334496	1.000	363.2 Da LogP -2.57 TPSA 206.0	1 viol.	✓ Clean	`Nc1nc2c(ncn2[C@H]2O[C@@H](COP(=O)(O)O)[C@H](O)[…`
ZINC104869865	0.857	443.2 Da LogP -2.45 TPSA 252.6	2 viol.	✓ Clean	`Nc1nc2c(ncn2[C@H]2O[C@H](CO[P@@](=O)(O)OP(=O)(O…`
ZINC12504289	0.857	443.2 Da LogP -2.45 TPSA 252.6	2 viol.	✓ Clean	`Nc1nc2c(ncn2[C@@H]2O[C@H](CO[P@@](=O)(O)OP(=O)(…`
ZINC34541308	0.857	443.2 Da LogP -2.45 TPSA 252.6	2 viol.	✓ Clean	`Nc1nc2c(ncn2[C@@H]2O[C@H](CO[P@@](=O)(O)OP(=O)(…`
ZINC35000839	0.857	443.2 Da LogP -2.45 TPSA 252.6	2 viol.	✓ Clean	`Nc1nc2c(ncn2[C@H]2O[C@@H](CO[P@@](=O)(O)OP(=O)(…`
ZINC45284491	0.857	443.2 Da LogP -2.45 TPSA 252.6	2 viol.	✓ Clean	`Nc1nc2c(ncn2[C@H]2O[C@@H](CO[P@@](=O)(O)OP(=O)(…`
ZINC80639694	0.857	443.2 Da LogP -2.45 TPSA 252.6	2 viol.	✓ Clean	`Nc1nc2c(ncn2[C@@H]2O[C@H](CO[P@@](=O)(O)OP(=O)(…`
ZINC8215481	0.857	443.2 Da LogP -2.45 TPSA 252.6	2 viol.	✓ Clean	`Nc1nc2c(ncn2[C@@H]2O[C@H](CO[P@@](=O)(O)OP(=O)(…`
ZINC33979258	0.800	364.2 Da LogP -2.45 TPSA 200.2	1 viol.	✓ Clean	`O=c1[nH]c(O)nc2c1ncn2[C@H]1O[C@@H](COP(=O)(O)O)…`
ZINC33979259	0.800	364.2 Da LogP -2.45 TPSA 200.2	1 viol.	✓ Clean	`O=c1[nH]c(O)nc2c1ncn2[C@H]1O[C@@H](COP(=O)(O)O)…`
ZINC78920152	0.800	364.2 Da LogP -2.45 TPSA 200.2	1 viol.	✓ Clean	`O=c1[nH]c(O)nc2c1ncn2[C@H]1O[C@@H](COP(=O)(O)O)…`
ZINC71774763	0.758	432.3 Da LogP -2.23 TPSA 198.3	1 viol.	✓ Clean	`Nc1nc2c(ncn2[C@@H]2O[C@H](CO[P@](=O)(O)N3CCOCC3…`
ZINC12296728	0.741	347.2 Da LogP -1.54 TPSA 185.8	✓ Ro5	✓ Clean	`Nc1nc2c(ncn2[C@H]2C[C@@H](O)[C@@H](COP(=O)(O)O)…`
ZINC13527599	0.741	347.2 Da LogP -1.54 TPSA 185.8	✓ Ro5	✓ Clean	`Nc1nc2c(ncn2[C@@H]2C[C@@H](O)[C@@H](COP(=O)(O)O…`
ZINC13527603	0.741	347.2 Da LogP -1.54 TPSA 185.8	✓ Ro5	✓ Clean	`Nc1nc2c(ncn2[C@@H]2C[C@H](O)[C@@H](COP(=O)(O)O)…`
ZINC1532627	0.741	347.2 Da LogP -1.54 TPSA 185.8	✓ Ro5	✓ Clean	`Nc1nc2c(ncn2[C@@H]2C[C@@H](O)[C@H](COP(=O)(O)O)…`
ZINC1730395	0.741	347.2 Da LogP -1.54 TPSA 185.8	✓ Ro5	✓ Clean	`Nc1nc2c(ncn2[C@H]2C[C@H](O)[C@@H](COP(=O)(O)O)O…`
ZINC3869846	0.741	347.2 Da LogP -1.54 TPSA 185.8	✓ Ro5	✓ Clean	`Nc1nc2c(ncn2[C@@H]2C[C@H](O)[C@H](COP(=O)(O)O)O…`
ZINC3869847	0.741	347.2 Da LogP -1.54 TPSA 185.8	✓ Ro5	✓ Clean	`Nc1nc2c(ncn2[C@H]2C[C@H](O)[C@H](COP(=O)(O)O)O2…`
ZINC3869848	0.741	347.2 Da LogP -1.54 TPSA 185.8	✓ Ro5	✓ Clean	`Nc1nc2c(ncn2[C@H]2C[C@@H](O)[C@H](COP(=O)(O)O)O…`
ZINC4743771	0.741	361.3 Da LogP -2.70 TPSA 182.6	1 viol.	✓ Clean	`CS(=O)(=O)OC[C@H]1O[C@@H](n2cnc3c(=O)[nH]c(N)nc…`
ZINC4743772	0.741	361.3 Da LogP -2.70 TPSA 182.6	1 viol.	✓ Clean	`CS(=O)(=O)OC[C@@H]1O[C@@H](n2cnc3c(=O)[nH]c(N)n…`
ZINC4743774	0.741	361.3 Da LogP -2.70 TPSA 182.6	1 viol.	✓ Clean	`CS(=O)(=O)OC[C@H]1O[C@@H](n2cnc3c(=O)[nH]c(N)nc…`
ZINC4743775	0.741	361.3 Da LogP -2.70 TPSA 182.6	1 viol.	✓ Clean	`CS(=O)(=O)OC[C@@H]1O[C@@H](n2cnc3c(=O)[nH]c(N)n…`
ZINC14951284	0.732	348.2 Da LogP -2.15 TPSA 180.0	✓ Ro5	✓ Clean	`O=c1[nH]cnc2c1ncn2[C@@H]1O[C@@H](COP(=O)(O)O)[C…`
ZINC1532551	0.732	348.2 Da LogP -2.15 TPSA 180.0	✓ Ro5	✓ Clean	`O=c1[nH]cnc2c1ncn2[C@H]1O[C@@H](COP(=O)(O)O)[C@…`
ZINC16969369	0.732	348.2 Da LogP -2.15 TPSA 180.0	✓ Ro5	✓ Clean	`O=c1[nH]cnc2c1ncn2[C@H]1O[C@@H](COP(=O)(O)O)[C@…`
ZINC4228242	0.732	348.2 Da LogP -2.15 TPSA 180.0	✓ Ro5	✓ Clean	`O=c1[nH]cnc2c1ncn2[C@@H]1O[C@H](COP(=O)(O)O)[C@…`
ZINC4353761	0.732	348.2 Da LogP -2.15 TPSA 180.0	✓ Ro5	✓ Clean	`O=c1[nH]cnc2c1ncn2[C@@H]1O[C@@H](COP(=O)(O)O)[C…`
ZINC8614392	0.732	348.2 Da LogP -2.15 TPSA 180.0	✓ Ro5	✓ Clean	`O=c1[nH]cnc2c1ncn2[C@@H]1O[C@@H](COP(=O)(O)O)[C…`
ZINC12503440	0.729	363.2 Da LogP -2.57 TPSA 206.0	1 viol.	✓ Clean	`Nc1nc2c(ncn2[C@@H]2O[C@H](CO)[C@@H](OP(=O)(O)O)…`
ZINC1530370	0.729	363.2 Da LogP -2.57 TPSA 206.0	1 viol.	✓ Clean	`Nc1nc2c(ncn2[C@H]2O[C@@H](CO)[C@H](OP(=O)(O)O)[…`
ZINC28631009	0.729	363.2 Da LogP -2.57 TPSA 206.0	1 viol.	✓ Clean	`Nc1nc2c(ncn2[C@@H]2O[C@H](CO)[C@H](OP(=O)(O)O)[…`
ZINC3872740	0.729	363.2 Da LogP -2.57 TPSA 206.0	1 viol.	✓ Clean	`Nc1nc2c(ncn2[C@H]2O[C@@H](CO)[C@@H](OP(=O)(O)O)…`
ZINC3872741	0.729	363.2 Da LogP -2.57 TPSA 206.0	1 viol.	✓ Clean	`Nc1nc2c(ncn2[C@@H]2O[C@@H](CO)[C@@H](OP(=O)(O)O…`
ZINC3872742	0.729	363.2 Da LogP -2.57 TPSA 206.0	1 viol.	✓ Clean	`Nc1nc2c(ncn2[C@H]2O[C@@H](CO)[C@@H](OP(=O)(O)O)…`
ZINC3872743	0.729	363.2 Da LogP -2.57 TPSA 206.0	1 viol.	✓ Clean	`Nc1nc2c(ncn2[C@@H]2O[C@@H](CO)[C@@H](OP(=O)(O)O…`
ZINC1570863	0.722	283.2 Da LogP -2.69 TPSA 159.5	✓ Ro5	✓ Clean	`Nc1nc2c(ncn2[C@H]2O[C@H](CO)[C@@H](O)[C@H]2O)c(…`
ZINC3869967	0.722	283.2 Da LogP -2.69 TPSA 159.5	✓ Ro5	✓ Clean	`Nc1nc2c(ncn2[C@H]2O[C@@H](CO)[C@@H](O)[C@H]2O)c…`
ZINC3869970	0.722	283.2 Da LogP -2.69 TPSA 159.5	✓ Ro5	✓ Clean	`Nc1nc2c(ncn2[C@@H]2O[C@@H](CO)[C@@H](O)[C@@H]2O…`
ZINC4990802	0.722	282.3 Da LogP -2.72 TPSA 165.3	✓ Ro5	✓ Clean	`NC[C@@H]1O[C@@H](n2cnc3c(=O)[nH]c(N)nc32)[C@@H]…`
ZINC6119283	0.722	283.2 Da LogP -2.69 TPSA 159.5	✓ Ro5	✓ Clean	`Nc1nc2c(ncn2[C@@H]2O[C@H](CO)[C@H](O)[C@H]2O)c(…`

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.