Protein profile

PA1326

threonine dehydratase

Genome: NC_002516.2

Gene: ilvA2 ilvA PA1326 Structure source: AlphaFold UniProt Q9I418

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Amino acids 515

Annotations 6

Features 30

PDB binders 4

Druggability 0.649

Overview

Basic information about this protein and its source genome.

Accession: PA1326
Assembly: Pseudomonas aeruginosa PAO1, complete genome
Gene: ilvA2 ilvA PA1326
Status: annotated
Amino acids: 515
Structure source: AlphaFold

4.3.1.19

GO:0030170 Binding to pyridoxal 5' phosphate, 3-hydroxy-5-(hydroxymethyl)-2-methyl4-pyridine carboxaldehyde 5' phosphate, the biologically active form of vitamin B6. GO:0004794 Catalysis of the reaction: L-threonine = 2-oxobutanoate + NH4. GO:0009066 OBSOLETE. The chemical reactions and pathways involving amino acids of the aspartate family, comprising asparagine, aspartate, lysine, methionine and threonine. GO:0009097 OBSOLETE. The chemical reactions and pathways resulting in the formation of isoleucine, (2R*,3R*)-2-amino-3-methylpentanoic acid. GO:0006520 The chemical reactions and pathways involving amino acids, carboxylic acids containing one or more amino groups.

Target profile

Computed evidence for target prioritization.

Human off-target: hit
Human identity (%): 49.315
Human E-value: 2.6e-14
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 0.649

Structure –

Pocket –

Sequence

Primary amino-acid sequence viewer.

MSASTLSASKPLLAGYVESILAAPVYDVAVETPLQVAPQLSQRLGNRVLLKREDLQPVFSFKIRGAYTRVARLSDEQKARGVITASAGNHAQGLALAAQRLGVRAVIVMPRTTPELKVKGVLARGGEALLHGDAFPDALAHALQLAEREGMTFVPPYDDPDVIAGQGTVAMEILRQHSGRLDAIFVPVGGGSLIAGIAAYVKHLRPDIRVIGVEPEDSNCLQAALAAGERVVLGQVGLFADGVAVAQIGACNFEVCKDHVDEVITVGSDEICAAIKDIYDDTRSITEPAGALAVAGIKKYVARERTEGQTLVAIDSGANINFDRLRHVAERAELGEQREAIIAVTVAERPGSFKAFCAALGRRQITEFNYRYHSDRQAHLFVGVQTHPLTDSRADLLAGLREQGFPVLDLTDNEMAKLHIRHMVGGHGTEVRRERLFRFEFPERPGALLNFLDKLGSRWNISLFHYRNHGAADGRVLAGLQVPDEERGELEAALQAIGYPYWEETHNPAYRLFAG

Functional Annotations

Enzyme classification and Gene Ontology terms linked to this protein.

1 EC 5 GO

Enzyme Commission (EC)

4.3.1.19

Gene Ontology (GO)

GO:0030170 Binding to pyridoxal 5' phosphate, 3-hydroxy-5-(hydroxymethyl)-2-methyl4-pyridine carboxaldehyde 5' phosphate, the biologically active form of vitamin B6.
GO:0004794 Catalysis of the reaction: L-threonine = 2-oxobutanoate + NH4.
GO:0009066 OBSOLETE. The chemical reactions and pathways involving amino acids of the aspartate family, comprising asparagine, aspartate, lysine, methionine and threonine.
GO:0009097 OBSOLETE. The chemical reactions and pathways resulting in the formation of isoleucine, (2R*,3R*)-2-amino-3-methylpentanoic acid.
GO:0006520 The chemical reactions and pathways involving amino acids, carboxylic acids containing one or more amino groups.

Sequence Features

Domain/signature hits from InterPro and related databases.

30 records

Show feature table

Start	End	DB	Term	Name
340	412	ProSiteProfiles	PS51672	ACT-like domain profile.
340	412	InterPro	IPR001721	Threonine dehydratase, ACT-like domain
434	513	CDD	cd04907	ACT_ThrD-I_2
435	506	ProSiteProfiles	PS51672	ACT-like domain profile.
435	506	InterPro	IPR001721	Threonine dehydratase, ACT-like domain
30	317	Pfam	PF00291	Pyridoxal-phosphate dependent enzyme
30	317	InterPro	IPR001926	Tryptophan synthase beta chain-like, PALP domain
16	513	NCBIfam	TIGR01124	threonine ammonia-lyase, biosynthetic
16	513	InterPro	IPR005787	Threonine dehydratase, biosynthetic
17	321	CDD	cd01562	Thr-dehyd
24	513	PANTHER	PTHR48078	THREONINE DEHYDRATASE, MITOCHONDRIAL-RELATED
421	513	SUPERFAMILY	SSF55021	ACT-like
421	513	InterPro	IPR045865	ACT-like domain
339	423	CDD	cd04906	ACT_ThrD-I_1
53	66	ProSitePatterns	PS00165	Serine/threonine dehydratases pyridoxal-phosphate attachment site.
53	66	InterPro	IPR000634	Serine/threonine dehydratase, pyridoxal-phosphate-binding site
32	311	Gene3D	G3DSA:3.40.50.1100	-
32	311	InterPro	IPR036052	Tryptophan synthase beta chain-like, PALP domain superfamily
339	514	Gene3D	G3DSA:3.40.1020.10	Biosynthetic Threonine Deaminase; Domain 3
339	514	InterPro	IPR038110	Threonine dehydratase, ACT-like domain superfamily
339	515	FunFam	G3DSA:3.40.1020.10:FF:000001	L-threonine dehydratase
65	156	Gene3D	G3DSA:3.40.50.1100	-
65	156	InterPro	IPR036052	Tryptophan synthase beta chain-like, PALP domain superfamily
330	420	Pfam	PF00585	C-terminal regulatory domain of Threonine dehydratase
330	420	InterPro	IPR001721	Threonine dehydratase, ACT-like domain
430	513	Pfam	PF00585	C-terminal regulatory domain of Threonine dehydratase
430	513	InterPro	IPR001721	Threonine dehydratase, ACT-like domain
141	311	FunFam	G3DSA:3.40.50.1100:FF:000008	L-threonine dehydratase
16	366	SUPERFAMILY	SSF53686	Tryptophan synthase beta subunit-like PLP-dependent enzymes
16	366	InterPro	IPR036052	Tryptophan synthase beta chain-like, PALP domain superfamily

3D Structure

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

Loading 3D structure...

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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 PA1326	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
1				0.649
3				0.327

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

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
15P	3IAU	P25306	1529.8 Da LogP 0.17 TPSA 334.1	2 viol.	✓ Clean	`COCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCO…`
ACP	1WTC	O59791	505.2 Da LogP -1.52 TPSA 269.9	3 viol.	✓ Clean	`c1nc(c2c(n1)n(cn2)[C@H]3[C@@H]([C@@H]([C@H](O3)…`
MLI	3L6R	Q9GZT4	102.0 Da LogP -3.12 TPSA 80.3	✓ Ro5	✓ Clean	`C(C(=O)[O-])C(=O)[O-]`
PDD	2ZPU	O59791	320.2 Da LogP 0.27 TPSA 149.2	✓ Ro5	✓ Clean	`Cc1c(c(c(cn1)COP(=O)(O)O)CN[C@H](C)C(=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).

Ligand	UniProt (homolog)	pchembl	MW · LogP · TPSA	Lipinski	PAINS	SMILES
CHEMBL566071	Q9QZX7	—	148.1 Da LogP -1.22 TPSA 98.7	✓ Ro5	✓ Clean	`O=C(CCC(=O)NO)NO`
CHEMBL569435	Q9QZX7	—	134.1 Da LogP -1.61 TPSA 98.7	✓ Ro5	✓ Clean	`O=C(CC(=O)NO)NO`
SD4	Q9GZT4	—	148.1 Da LogP -1.71 TPSA 112.6	✓ Ro5	✓ Clean	`C([C@@H](C(=O)O)N)C(=O)NO`

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
ZINC1580161	1.000	208.3 Da LogP -0.33 TPSA 57.2	✓ Ro5	✓ Clean	`COCCOCCOCCOCCO`
ZINC16052118	1.000	340.4 Da LogP -0.28 TPSA 84.8	✓ Ro5	✓ Clean	`COCCOCCOCCOCCOCCOCCOCCO`
ZINC16052257	1.000	384.5 Da LogP -0.26 TPSA 94.1	✓ Ro5	✓ Clean	`COCCOCCOCCOCCOCCOCCOCCOCCO`
ZINC34317654	1.000	472.6 Da LogP -0.23 TPSA 112.5	1 viol.	✓ Clean	`COCCOCCOCCOCCOCCOCCOCCOCCOCCOCCO`
ZINC44076059	1.000	428.5 Da LogP -0.24 TPSA 103.3	✓ Ro5	✓ Clean	`COCCOCCOCCOCCOCCOCCOCCOCCOCCO`
ZINC5210101	1.000	252.3 Da LogP -0.31 TPSA 66.4	✓ Ro5	✓ Clean	`COCCOCCOCCOCCOCCO`
ZINC5997860	1.000	296.4 Da LogP -0.29 TPSA 75.6	✓ Ro5	✓ Clean	`COCCOCCOCCOCCOCCOCCO`
ZINC105469665	0.873	425.2 Da LogP -1.64 TPSA 223.4	2 viol.	✓ Clean	`Nc1ncnc2c1ncn2[C@@H]1O[C@H](CO[P@@](=O)(O)CP(=O…`
ZINC13527614	0.873	425.2 Da LogP -1.64 TPSA 223.4	2 viol.	✓ Clean	`Nc1ncnc2c1ncn2[C@@H]1O[C@H](CO[P@](=O)(O)CP(=O)…`
ZINC219330894	0.873	425.2 Da LogP -1.64 TPSA 223.4	2 viol.	✓ Clean	`Nc1ncnc2c1ncn2[C@@H]1O[C@H](CO[P@](=O)(O)CP(=O)…`
ZINC3873852	0.873	425.2 Da LogP -1.64 TPSA 223.4	2 viol.	✓ Clean	`Nc1ncnc2c1ncn2[C@H]1O[C@@H](CO[P@](=O)(O)CP(=O)…`
ZINC3873853	0.873	425.2 Da LogP -1.64 TPSA 223.4	2 viol.	✓ Clean	`Nc1ncnc2c1ncn2[C@@H]1O[C@@H](CO[P@](=O)(O)CP(=O…`
ZINC3873854	0.873	425.2 Da LogP -1.64 TPSA 223.4	2 viol.	✓ Clean	`Nc1ncnc2c1ncn2[C@H]1O[C@@H](CO[P@](=O)(O)CP(=O)…`
ZINC3873855	0.873	425.2 Da LogP -1.64 TPSA 223.4	2 viol.	✓ Clean	`Nc1ncnc2c1ncn2[C@@H]1O[C@@H](CO[P@](=O)(O)CP(=O…`
ZINC12360002	0.839	427.2 Da LogP -1.75 TPSA 232.6	2 viol.	✓ Clean	`Nc1ncnc2c1ncn2[C@@H]1O[C@H](CO[P@@](=O)(O)OP(=O…`
ZINC12360703	0.839	427.2 Da LogP -1.75 TPSA 232.6	2 viol.	✓ Clean	`Nc1ncnc2c1ncn2[C@@H]1O[C@H](CO[P@@](=O)(O)OP(=O…`
ZINC12503599	0.839	427.2 Da LogP -1.75 TPSA 232.6	2 viol.	✓ Clean	`Nc1ncnc2c1ncn2[C@@H]1O[C@H](CO[P@@](=O)(O)OP(=O…`
ZINC16546165	0.839	427.2 Da LogP -1.75 TPSA 232.6	2 viol.	✓ Clean	`Nc1ncnc2c1ncn2[C@H]1O[C@H](CO[P@](=O)(O)OP(=O)(…`
ZINC31977053	0.839	427.2 Da LogP -1.75 TPSA 232.6	2 viol.	✓ Clean	`Nc1ncnc2c1ncn2[C@H]1O[C@@H](CO[P@](=O)(O)OP(=O)…`
ZINC4806433	0.839	427.2 Da LogP -1.75 TPSA 232.6	2 viol.	✓ Clean	`Nc1ncnc2c1ncn2[C@@H]1O[C@H](CO[P@@](=O)(O)OP(=O…`
ZINC53683898	0.839	427.2 Da LogP -1.75 TPSA 232.6	2 viol.	✓ Clean	`Nc1ncnc2c1ncn2[C@@H]1O[C@@H](CO[P@@](=O)(O)OP(=…`
ZINC8586019	0.839	427.2 Da LogP -1.75 TPSA 232.6	2 viol.	✓ Clean	`Nc1ncnc2c1ncn2[C@H]1O[C@@H](CO[P@](=O)(O)OP(=O)…`
ZINC8586020	0.839	427.2 Da LogP -1.75 TPSA 232.6	2 viol.	✓ Clean	`Nc1ncnc2c1ncn2[C@@H]1O[C@@H](CO[P@@](=O)(O)OP(=…`
ZINC8586021	0.839	427.2 Da LogP -1.75 TPSA 232.6	2 viol.	✓ Clean	`Nc1ncnc2c1ncn2[C@H]1O[C@@H](CO[P@@](=O)(O)OP(=O…`
ZINC8586022	0.839	427.2 Da LogP -1.75 TPSA 232.6	2 viol.	✓ Clean	`Nc1ncnc2c1ncn2[C@@H]1O[C@@H](CO[P@@](=O)(O)OP(=…`
ZINC13518964	0.768	347.2 Da LogP -1.86 TPSA 186.1	✓ Ro5	✓ Clean	`Nc1ncnc2c1ncn2[C@@H]1O[C@@H](COP(=O)(O)O)[C@H](…`
ZINC1532515	0.768	347.2 Da LogP -1.86 TPSA 186.1	✓ Ro5	✓ Clean	`Nc1ncnc2c1ncn2[C@H]1O[C@@H](COP(=O)(O)O)[C@H](O…`
ZINC1571045	0.768	347.2 Da LogP -1.86 TPSA 186.1	✓ Ro5	✓ Clean	`Nc1ncnc2c1ncn2[C@@H]1O[C@@H](COP(=O)(O)O)[C@@H]…`
ZINC1842158	0.768	347.2 Da LogP -1.86 TPSA 186.1	✓ Ro5	✓ Clean	`Nc1ncnc2c1ncn2[C@H]1O[C@@H](COP(=O)(O)O)[C@H](O…`
ZINC2046931	0.768	347.2 Da LogP -1.86 TPSA 186.1	✓ Ro5	✓ Clean	`Nc1ncnc2c1ncn2[C@@H]1O[C@@H](COP(=O)(O)O)[C@H](…`
ZINC2126310	0.768	347.2 Da LogP -1.86 TPSA 186.1	✓ Ro5	✓ Clean	`Nc1ncnc2c1ncn2[C@@H]1O[C@H](COP(=O)(O)O)[C@@H](…`
ZINC3201891	0.768	347.2 Da LogP -1.86 TPSA 186.1	✓ Ro5	✓ Clean	`Nc1ncnc2c1ncn2[C@@H]1O[C@@H](COP(=O)(O)O)[C@@H]…`
ZINC3201893	0.768	347.2 Da LogP -1.86 TPSA 186.1	✓ Ro5	✓ Clean	`Nc1ncnc2c1ncn2[C@H]1O[C@@H](COP(=O)(O)O)[C@@H](…`
ZINC3830180	0.768	347.2 Da LogP -1.86 TPSA 186.1	✓ Ro5	✓ Clean	`Nc1ncnc2c1ncn2[C@H]1O[C@@H](COP(=O)(O)O)[C@@H](…`
ZINC3860156	0.768	347.2 Da LogP -1.86 TPSA 186.1	✓ Ro5	✓ Clean	`Nc1ncnc2c1ncn2[C@@H]1O[C@H](COP(=O)(O)O)[C@@H](…`
ZINC3977897	0.768	347.2 Da LogP -1.86 TPSA 186.1	✓ Ro5	✓ Clean	`Nc1ncnc2c1ncn2[C@H]1O[C@H](COP(=O)(O)O)[C@@H](O…`
ZINC4806442	0.768	347.2 Da LogP -1.86 TPSA 186.1	✓ Ro5	✓ Clean	`Nc1ncnc2c1ncn2[C@@H]1O[C@H](COP(=O)(O)O)[C@H](O…`
ZINC8613167	0.768	347.2 Da LogP -1.86 TPSA 186.1	✓ Ro5	✓ Clean	`Nc1ncnc2c1ncn2[C@@H]1O[C@H](COP(=O)(O)O)[C@H](O…`
ZINC4096224	0.754	346.2 Da LogP -1.90 TPSA 191.9	✓ Ro5	✓ Clean	`Nc1ncnc2c1ncn2[C@@H]1O[C@H](CO[P@](N)(=O)O)[C@@…`
ZINC12503850	0.750	427.3 Da LogP -2.04 TPSA 229.4	1 viol.	✓ Clean	`Nc1ncnc2c1ncn2[C@@H]1O[C@H](CO[P@](=O)(O)OS(=O)…`
ZINC141161066	0.750	427.3 Da LogP -2.04 TPSA 229.4	1 viol.	✓ Clean	`Nc1ncnc2c1ncn2[C@@H]1O[C@H](CO[P@](=O)(O)OS(=O)…`
ZINC141163786	0.750	427.3 Da LogP -2.04 TPSA 229.4	1 viol.	✓ Clean	`Nc1ncnc2c1ncn2[C@@H]1O[C@H](CO[P@](=O)(O)OS(=O)…`
ZINC4228246	0.750	427.3 Da LogP -2.04 TPSA 229.4	1 viol.	✓ Clean	`Nc1ncnc2c1ncn2[C@@H]1O[C@H](CO[P@@](=O)(O)OS(=O…`
ZINC105372833	0.737	345.3 Da LogP -1.93 TPSA 197.6	✓ Ro5	✓ Clean	`Nc1ncnc2c1ncn2[C@@H]1O[C@H](COP(N)(N)=O)[C@H](O…`
ZINC105372837	0.737	345.3 Da LogP -1.93 TPSA 197.6	✓ Ro5	✓ Clean	`Nc1ncnc2c1ncn2[C@@H]1O[C@H](COP(N)(N)=O)[C@H](O…`
ZINC17107643	0.737	345.3 Da LogP -1.93 TPSA 197.6	✓ Ro5	✓ Clean	`Nc1ncnc2c1ncn2[C@@H]1O[C@H](COP(N)(N)=O)[C@@H](…`
ZINC204538551	0.737	345.3 Da LogP -1.93 TPSA 197.6	✓ Ro5	✓ Clean	`Nc1ncnc2c1ncn2[C@@H]1O[C@H](COP(N)(N)=O)[C@@H](…`
ZINC575419714	0.727	312.4 Da LogP 0.42 TPSA 66.4	✓ Ro5	✓ Clean	`COCCOCCOCCSCCOCCOCCO`
ZINC31475423	0.726	434.3 Da LogP -2.99 TPSA 238.4	2 viol.	✓ Clean	`Nc1ncnc2c1ncn2[C@H]1O[C@H](CO[P@@](=O)(O)OC(=O)…`
ZINC5615251	0.700	375.3 Da LogP -0.55 TPSA 164.1	1 viol.	✓ Clean	`COP(=O)(OC)OC[C@H]1O[C@@H](n2cnc3c(N)ncnc32)[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.