Protein profile

PA4054

3,4-dihydroxy-2-butanone-4-phosphate synthase

Genome: NC_002516.2

Gene: ribB PA4054 Structure source: AlphaFold UniProt Q9HWX4

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Amino acids 365

Annotations 7

Features 18

PDB binders 3

Druggability 0.736

Overview

Basic information about this protein and its source genome.

Accession: PA4054
Assembly: Pseudomonas aeruginosa PAO1, complete genome
Gene: ribB PA4054
Status: annotated
Amino acids: 365
Structure source: AlphaFold

4.1.99.12

GO:0005829 The part of the cytoplasm that does not contain organelles but which does contain other particulate matter, such as protein complexes. GO:0008686 Catalysis of the reaction: D-ribulose 5-phosphate = (2S)-2-hydroxy-3-oxobutyl phosphate + formate + H+. GO:0003935 Catalysis of the reaction: GTP + 4 H2O = 2,5-diamino-6-hydroxy-4-(5-phosphoribosylamino)-pyrimidine + formate + 3 H+ + 2 phosphate. GO:0000287 Binding to a magnesium (Mg) ion. GO:0030145 Binding to a manganese ion (Mn). GO:0009231 The chemical reactions and pathways resulting in the formation of riboflavin (vitamin B2), the precursor for the coenzymes flavin mononucleotide (FMN) and flavin adenine dinucleotide (FAD).

Target profile

Computed evidence for target prioritization.

Human off-target: No hit
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 0.736

Structure –

Pocket –

Sequence

Primary amino-acid sequence viewer.

MALNTIDELIEDIRQGKMVILMDDEDRENEGDLIMAAECVRTEDINFMVKHARGLVCMPMTRERCERLGLPLMVQRNGSGFGTKFTVSIEAAEGVTTGISAADRARTVQAAAAKNAVAADIVSPGHIFPLMAQPGGTLARAGHTEAACDLARMAGFEPSGVICEVMNDDGSMARRPELEAFAAEHGIKIGTIADLIHYRLIHERTVERIAEQPLDSELGHFNLITYRDSVEGDVHLALTLGKVCAEEPTLVRVHNMDPLRDLLQVNQPGRWSLRAAMTKVAEAGSGVVLLLGHQIGGDDLLAHVREIASAPAPAPKATTTYSTVGAGSQILRDLGVRKMRLLSAPMRFNAISGFDLEVVEYLPAE

Functional Annotations

Enzyme classification and Gene Ontology terms linked to this protein.

1 EC 6 GO

Enzyme Commission (EC)

4.1.99.12

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:0008686 Catalysis of the reaction: D-ribulose 5-phosphate = (2S)-2-hydroxy-3-oxobutyl phosphate + formate + H+.
GO:0003935 Catalysis of the reaction: GTP + 4 H2O = 2,5-diamino-6-hydroxy-4-(5-phosphoribosylamino)-pyrimidine + formate + 3 H+ + 2 phosphate.
GO:0000287 Binding to a magnesium (Mg) ion.
GO:0030145 Binding to a manganese ion (Mn).
GO:0009231 The chemical reactions and pathways resulting in the formation of riboflavin (vitamin B2), the precursor for the coenzymes flavin mononucleotide (FMN) and flavin adenine dinucleotide (FAD).

Sequence Features

Domain/signature hits from InterPro and related databases.

18 records

Show feature table

Start	End	DB	Term	Name
1	205	Gene3D	G3DSA:3.90.870.10	DHBP synthase
2	363	PANTHER	PTHR21327	GTP CYCLOHYDROLASE II-RELATED
1	205	FunFam	G3DSA:3.90.870.10:FF:000001	Riboflavin biosynthesis protein RibBA
2	202	SUPERFAMILY	SSF55821	YrdC/RibB
2	202	InterPro	IPR017945	DHBP synthase RibB-like alpha/beta domain superfamily
206	365	Gene3D	G3DSA:3.40.50.10990	GTP cyclohydrolase II
206	365	InterPro	IPR036144	GTP cyclohydrolase II superfamily
204	363	SUPERFAMILY	SSF142695	RibA-like
204	363	InterPro	IPR036144	GTP cyclohydrolase II superfamily
8	198	Pfam	PF00926	3,4-dihydroxy-2-butanone 4-phosphate synthase
8	198	InterPro	IPR000422	3,4-dihydroxy-2-butanone 4-phosphate synthase, RibB
1	365	PIRSF	PIRSF001259	RibA
3	199	NCBIfam	TIGR00506	3,4-dihydroxy-2-butanone-4-phosphate synthase
3	199	InterPro	IPR000422	3,4-dihydroxy-2-butanone 4-phosphate synthase, RibB
208	363	Pfam	PF00925	GTP cyclohydrolase II
208	363	InterPro	IPR032677	GTP cyclohydrolase II
1	203	Hamap	MF_00180	3,4-dihydroxy-2-butanone 4-phosphate synthase [ribB].
1	203	InterPro	IPR000422	3,4-dihydroxy-2-butanone 4-phosphate synthase, RibB

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 PA4054	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				0.736
1				0.569

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.

53 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
5RP	1TKU	Q5A3V6	230.1 Da LogP -2.62 TPSA 144.5	✓ Ro5	✓ Clean	`C([C@H]([C@H](C(=O)CO)O)O)OP(=O)(O)O`
5SP	3LQU	P66032	230.1 Da LogP -2.62 TPSA 144.5	✓ Ro5	✓ Clean	`C([C@H]([C@@H](C(=O)CO)O)O)OP(=O)(O)O`
RES	4P6C	Q9KKP2	231.1 Da LogP -2.68 TPSA 156.5	1 viol.	✓ Clean	`C([C@H]([C@H](C(=O)NO)O)O)OP(=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
ZINC1529626	1.000	230.1 Da LogP -2.62 TPSA 144.5	✓ Ro5	✓ Clean	`O=C(CO)[C@H](O)[C@@H](O)COP(=O)(O)O`
ZINC1532567	1.000	230.1 Da LogP -2.62 TPSA 144.5	✓ Ro5	✓ Clean	`O=C(CO)[C@H](O)[C@H](O)COP(=O)(O)O`
ZINC1532851	1.000	230.1 Da LogP -2.62 TPSA 144.5	✓ Ro5	✓ Clean	`O=C(CO)[C@@H](O)[C@@H](O)COP(=O)(O)O`
ZINC30320708	1.000	230.1 Da LogP -2.62 TPSA 144.5	✓ Ro5	✓ Clean	`O=C(CO)[C@@H](O)[C@H](O)COP(=O)(O)O`
ZINC100065511	0.793	260.1 Da LogP -3.26 TPSA 164.8	1 viol.	✓ Clean	`O=C(CO)[C@H](O)[C@H](O)[C@@H](O)COP(=O)(O)O`
ZINC100085043	0.793	260.1 Da LogP -3.26 TPSA 164.8	1 viol.	✓ Clean	`O=C(CO)[C@H](O)[C@H](O)[C@H](O)COP(=O)(O)O`
ZINC104869937	0.793	260.1 Da LogP -3.26 TPSA 164.8	1 viol.	✓ Clean	`O=C(CO)[C@H](O)[C@@H](O)[C@@H](O)COP(=O)(O)O`
ZINC13537943	0.793	260.1 Da LogP -3.26 TPSA 164.8	1 viol.	✓ Clean	`O=C(CO)[C@H](O)[C@@H](O)[C@H](O)COP(=O)(O)O`
ZINC85994845	0.793	260.1 Da LogP -3.26 TPSA 164.8	1 viol.	✓ Clean	`O=C(CO)[C@@H](O)[C@H](O)[C@H](O)COP(=O)(O)O`
ZINC5132038	0.767	290.2 Da LogP -3.90 TPSA 185.0	1 viol.	✓ Clean	`O=C(CO)[C@@H](O)[C@H](O)[C@H](O)[C@H](O)COP(=O)…`
ZINC3870277	0.724	310.1 Da LogP -2.50 TPSA 191.0	1 viol.	✓ Clean	`O=C(COP(=O)(O)O)[C@H](O)[C@H](O)COP(=O)(O)O`
ZINC5830339	0.594	231.1 Da LogP -2.68 TPSA 156.5	1 viol.	✓ Clean	`O=C(NO)[C@H](O)[C@H](O)COP(=O)(O)O`
ZINC5975509	0.586	202.1 Da LogP -2.19 TPSA 127.5	✓ Ro5	✓ Clean	`O=P(O)(O)OC[C@H](O)[C@H](O)CO`
ZINC12502210	0.576	340.1 Da LogP -3.14 TPSA 211.3	1 viol.	✓ Clean	`O=C(COP(=O)(O)O)[C@H](O)[C@H](O)[C@@H](O)COP(=O…`
ZINC12502212	0.576	340.1 Da LogP -3.14 TPSA 211.3	1 viol.	✓ Clean	`O=C(COP(=O)(O)O)[C@H](O)[C@H](O)[C@H](O)COP(=O)…`
ZINC12502214	0.576	340.1 Da LogP -3.14 TPSA 211.3	1 viol.	✓ Clean	`O=C(COP(=O)(O)O)[C@H](O)[C@@H](O)[C@@H](O)COP(=…`
ZINC12502216	0.576	340.1 Da LogP -3.14 TPSA 211.3	1 viol.	✓ Clean	`O=C(COP(=O)(O)O)[C@H](O)[C@@H](O)[C@H](O)COP(=O…`
ZINC4523251	0.576	340.1 Da LogP -3.14 TPSA 211.3	1 viol.	✓ Clean	`O=C(COP(=O)(O)O)[C@@H](O)[C@@H](O)[C@@H](O)COP(…`
ZINC4523255	0.576	340.1 Da LogP -3.14 TPSA 211.3	1 viol.	✓ Clean	`O=C(COP(=O)(O)O)[C@@H](O)[C@@H](O)[C@H](O)COP(=…`
ZINC4523257	0.576	340.1 Da LogP -3.14 TPSA 211.3	1 viol.	✓ Clean	`O=C(COP(=O)(O)O)[C@@H](O)[C@H](O)[C@@H](O)COP(=…`
ZINC4523259	0.576	340.1 Da LogP -3.14 TPSA 211.3	1 viol.	✓ Clean	`O=C(COP(=O)(O)O)[C@@H](O)[C@H](O)[C@H](O)COP(=O…`
ZINC31259596	0.563	230.1 Da LogP -2.62 TPSA 144.5	✓ Ro5	✓ Clean	`O=C(COP(=O)(O)O)[C@@H](O)[C@H](O)CO`
ZINC31259600	0.563	230.1 Da LogP -2.62 TPSA 144.5	✓ Ro5	✓ Clean	`O=C(COP(=O)(O)O)[C@@H](O)[C@@H](O)CO`
ZINC3869804	0.563	230.1 Da LogP -2.62 TPSA 144.5	✓ Ro5	✓ Clean	`O=C(COP(=O)(O)O)[C@H](O)[C@@H](O)CO`
ZINC3869805	0.563	230.1 Da LogP -2.62 TPSA 144.5	✓ Ro5	✓ Clean	`O=C(COP(=O)(O)O)[C@H](O)[C@H](O)CO`
ZINC2516111	0.548	262.2 Da LogP -3.47 TPSA 167.9	1 viol.	✓ Clean	`O=P(O)(O)OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)CO`
ZINC2522704	0.548	262.2 Da LogP -3.47 TPSA 167.9	1 viol.	✓ Clean	`O=P(O)(O)OC[C@H](O)[C@H](O)[C@@H](O)[C@@H](O)CO`
ZINC3869812	0.548	262.2 Da LogP -3.47 TPSA 167.9	1 viol.	✓ Clean	`O=P(O)(O)OC[C@@H](O)[C@@H](O)[C@H](O)[C@H](O)CO`
ZINC12501558	0.545	276.1 Da LogP -3.38 TPSA 185.0	1 viol.	✓ Clean	`O=C(O)[C@H](O)[C@H](O)[C@H](O)[C@@H](O)COP(=O)(…`
ZINC12501560	0.545	276.1 Da LogP -3.38 TPSA 185.0	1 viol.	✓ Clean	`O=C(O)[C@H](O)[C@H](O)[C@H](O)[C@H](O)COP(=O)(O…`
ZINC12501562	0.545	276.1 Da LogP -3.38 TPSA 185.0	1 viol.	✓ Clean	`O=C(O)[C@H](O)[C@H](O)[C@@H](O)[C@@H](O)COP(=O)…`
ZINC12501564	0.545	276.1 Da LogP -3.38 TPSA 185.0	1 viol.	✓ Clean	`O=C(O)[C@H](O)[C@H](O)[C@@H](O)[C@H](O)COP(=O)(…`
ZINC1532623	0.545	276.1 Da LogP -3.38 TPSA 185.0	1 viol.	✓ Clean	`O=C(O)[C@H](O)[C@@H](O)[C@H](O)[C@H](O)COP(=O)(…`
ZINC2047359	0.545	276.1 Da LogP -3.38 TPSA 185.0	1 viol.	✓ Clean	`O=C(O)[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)COP(=O…`
ZINC2545091	0.545	276.1 Da LogP -3.38 TPSA 185.0	1 viol.	✓ Clean	`O=C(O)[C@@H](O)[C@H](O)[C@@H](O)[C@@H](O)COP(=O…`
ZINC3869602	0.545	276.1 Da LogP -3.38 TPSA 185.0	1 viol.	✓ Clean	`O=C(O)[C@@H](O)[C@@H](O)[C@@H](O)[C@@H](O)COP(=…`
ZINC3869603	0.545	276.1 Da LogP -3.38 TPSA 185.0	1 viol.	✓ Clean	`O=C(O)[C@@H](O)[C@@H](O)[C@@H](O)[C@H](O)COP(=O…`
ZINC3869604	0.545	276.1 Da LogP -3.38 TPSA 185.0	1 viol.	✓ Clean	`O=C(O)[C@@H](O)[C@@H](O)[C@H](O)[C@H](O)COP(=O)…`
ZINC1560408815	0.514	339.1 Da LogP -1.87 TPSA 214.1	1 viol.	✓ Clean	`[O]/C(COP(=O)(O)O)=C(/O)[C@H](O)[C@H](O)COP(=O)…`
ZINC100033330	0.500	260.1 Da LogP -3.26 TPSA 164.8	1 viol.	✓ Clean	`O=C[C@H](O)[C@@H](O)[C@@H](O)[C@H](O)COP(=O)(O)O`
ZINC104861723	0.500	260.1 Da LogP -3.26 TPSA 164.8	1 viol.	✓ Clean	`O=C[C@@H](O)[C@H](O)[C@@H](O)[C@@H](O)COP(=O)(O…`
ZINC12503763	0.500	260.1 Da LogP -3.26 TPSA 164.8	1 viol.	✓ Clean	`O=C[C@H](O)[C@H](O)[C@@H](O)[C@H](O)COP(=O)(O)O`
ZINC1532601	0.500	200.1 Da LogP -1.98 TPSA 124.3	✓ Ro5	✓ Clean	`O=C[C@@H](O)[C@H](O)COP(=O)(O)O`
ZINC19850142	0.500	260.1 Da LogP -3.26 TPSA 164.8	1 viol.	✓ Clean	`O=C[C@H](O)[C@@H](O)[C@H](O)[C@H](O)COP(=O)(O)O`
ZINC32786787	0.500	200.1 Da LogP -1.98 TPSA 124.3	✓ Ro5	✓ Clean	`O=C[C@H](O)[C@H](O)COP(=O)(O)O`
ZINC4545928	0.500	260.1 Da LogP -3.26 TPSA 164.8	1 viol.	✓ Clean	`O=C[C@@H](O)[C@@H](O)[C@@H](O)[C@H](O)COP(=O)(O…`
ZINC4545929	0.500	260.1 Da LogP -3.26 TPSA 164.8	1 viol.	✓ Clean	`O=C[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)COP(=O)(O…`
ZINC4887586	0.500	260.1 Da LogP -2.35 TPSA 164.8	1 viol.	✓ Clean	`O=C(O)C[C@H](O)[C@H](O)[C@H](O)COP(=O)(O)O`
ZINC4887587	0.500	260.1 Da LogP -2.35 TPSA 164.8	1 viol.	✓ Clean	`O=C(O)C[C@@H](O)[C@H](O)[C@H](O)COP(=O)(O)O`
ZINC4887588	0.500	260.1 Da LogP -2.35 TPSA 164.8	1 viol.	✓ Clean	`O=C(O)C[C@H](O)[C@@H](O)[C@H](O)COP(=O)(O)O`

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.