Protein profile

PA1868

secretion protein XqhA

Genome: NC_002516.2

Gene: PA1868 xqhA Structure source: AlphaFold UniProt Q9I2M7

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Amino acids 776

Annotations 6

Features 39

PDB binders 2

Druggability 0.522

Overview

Basic information about this protein and its source genome.

Accession: PA1868
Assembly: Pseudomonas aeruginosa PAO1, complete genome
Gene: PA1868 xqhA
Status: annotated
Amino acids: 776
Structure source: AlphaFold

GO:0009279 A lipid bilayer that forms the outermost membrane of the cell envelope; enriched in polysaccharide and protein; the outer leaflet of the membrane contains specific lipopolysaccharide structures. GO:0015627 A large protein complex, containing 12-15 subunits, that spans the cell envelope of Gram-negative bacteria and mediates the movement of proteins into the extracellular environment. The complex includes a component in the cytoplasm, an inner membrane subcomplex that reaches into the periplasmic compartment and a secretion pore in the outer membrane. Proteins using the Type II pathway are transported across the cytoplasmic membrane by the Sec or Tat complex. GO:0042834 Interacting selectively and non-covalently, in a non-covalent manner, with peptidoglycan, any of a class of glycoconjugates found in bacterial cell walls. GO:0009306 The controlled release of proteins from a cell. GO:0015628 The process in which proteins are secreted across the outer membrane of Gram-negative bacteria by the type II secretion system. Proteins using this pathway are first translocated across the cytoplasmic membrane via the Sec or Tat pathways. GO:0019867 The external membrane of Gram-negative bacteria or certain organelles such as mitochondria and chloroplasts; freely permeable to most ions and metabolites.

Target profile

Computed evidence for target prioritization.

Human off-target: No hit
Gut microbiome off-target: hit
Essential (DEG): N
Localization: OuterMembrane

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 0.522

Structure –

Pocket –

Sequence

Primary amino-acid sequence viewer.

Functional Annotations

Enzyme classification and Gene Ontology terms linked to this protein.

6 GO

Gene Ontology (GO)

GO:0009279 A lipid bilayer that forms the outermost membrane of the cell envelope; enriched in polysaccharide and protein; the outer leaflet of the membrane contains specific lipopolysaccharide structures.
GO:0015627 A large protein complex, containing 12-15 subunits, that spans the cell envelope of Gram-negative bacteria and mediates the movement of proteins into the extracellular environment. The complex includes a component in the cytoplasm, an inner membrane subcomplex that reaches into the periplasmic compartment and a secretion pore in the outer membrane. Proteins using the Type II pathway are transported across the cytoplasmic membrane by the Sec or Tat complex.
GO:0042834 Interacting selectively and non-covalently, in a non-covalent manner, with peptidoglycan, any of a class of glycoconjugates found in bacterial cell walls.
GO:0009306 The controlled release of proteins from a cell.
GO:0015628 The process in which proteins are secreted across the outer membrane of Gram-negative bacteria by the type II secretion system. Proteins using this pathway are first translocated across the cytoplasmic membrane via the Sec or Tat pathways.
GO:0019867 The external membrane of Gram-negative bacteria or certain organelles such as mitochondria and chloroplasts; freely permeable to most ions and metabolites.

Sequence Features

Domain/signature hits from InterPro and related databases.

39 records

Show feature table

Start	End	DB	Term	Name
1	32	Phobius	SIGNAL_PEPTIDE	Signal peptide region
33	776	Phobius	NON_CYTOPLASMIC_DOMAIN	Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
141	200	Pfam	PF03958	Bacterial type II/III secretion system short domain
141	200	InterPro	IPR005644	NolW-like
206	271	Pfam	PF03958	Bacterial type II/III secretion system short domain
206	271	InterPro	IPR005644	NolW-like
277	352	Pfam	PF03958	Bacterial type II/III secretion system short domain
277	352	InterPro	IPR005644	NolW-like
429	597	Pfam	PF00263	Bacterial type II and III secretion system protein
429	597	InterPro	IPR004846	Type II/III secretion system
1	35	SignalP_GRAM_POSITIVE	SignalP-TM	SignalP-TM
38	199	Gene3D	G3DSA:3.30.1370.120	-
38	199	InterPro	IPR038591	NolW-like superfamily
1	32	SignalP_GRAM_NEGATIVE	SignalP-noTM	SignalP-noTM
27	32	Phobius	SIGNAL_PEPTIDE_C_REGION	C-terminal region of a signal peptide.
38	198	FunFam	G3DSA:3.30.1370.120:FF:000011	Type II secretion system protein
200	271	Gene3D	G3DSA:3.30.1370.120	-
200	271	InterPro	IPR038591	NolW-like superfamily
273	351	Gene3D	G3DSA:3.30.1370.120	-
273	351	InterPro	IPR038591	NolW-like superfamily
35	640	PANTHER	PTHR30332	PROBABLE GENERAL SECRETION PATHWAY PROTEIN D
561	579	PRINTS	PR00811	Bacterial general secretion pathway protein D signature
561	579	InterPro	IPR001775	GspD/PilQ family
584	598	PRINTS	PR00811	Bacterial general secretion pathway protein D signature
584	598	InterPro	IPR001775	GspD/PilQ family
460	470	PRINTS	PR00811	Bacterial general secretion pathway protein D signature
460	470	InterPro	IPR001775	GspD/PilQ family
352	362	PRINTS	PR00811	Bacterial general secretion pathway protein D signature
352	362	InterPro	IPR001775	GspD/PilQ family
425	449	PRINTS	PR00811	Bacterial general secretion pathway protein D signature
425	449	InterPro	IPR001775	GspD/PilQ family
15	26	Phobius	SIGNAL_PEPTIDE_H_REGION	Hydrophobic region of a signal peptide.
48	605	NCBIfam	TIGR02517	type II secretion system secretin GspD
48	605	InterPro	IPR013356	Type II secretion system protein GspD
12	31	TMHMM	TMhelix	Region of a membrane-bound protein predicted to be embedded in the membrane.
1	14	Phobius	SIGNAL_PEPTIDE_N_REGION	N-terminal region of a signal peptide.
684	769	Gene3D	G3DSA:3.30.70.1070	Sporulation related repeat
684	769	InterPro	IPR036680	Sporulation-like domain superfamily
200	271	FunFam	G3DSA:3.30.1370.120:FF:000015	Type II secretion system protein D

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 PA1868	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
4				0.522
1				0.382
3				0.335
25				0.286

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.

52 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
CPS	7OFH	P03666	614.9 Da LogP 2.88 TPSA 147.0	1 viol.	✓ Clean	`C[C@H](CCC(=O)NCCC[N+](C)(C)CCCS(=O)(=O)[O-])[C…`
LDA	6PEE	P35672	229.4 Da LogP 4.48 TPSA 23.1	✓ Ro5	✓ Clean	`CCCCCCCCCCCC[N+](C)(C)[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
ZINC1849937	1.000	201.4 Da LogP 3.70 TPSA 23.1	✓ Ro5	✓ Clean	`CCCCCCCCCC[N+](C)(C)[O-]`
ZINC2008702	1.000	243.4 Da LogP 4.87 TPSA 23.1	✓ Ro5	✓ Clean	`CCCCCCCCCCCCC[N+](C)(C)[O-]`
ZINC2039372	1.000	229.4 Da LogP 4.48 TPSA 23.1	✓ Ro5	✓ Clean	`CCCCCCCCCCCC[N+](C)(C)[O-]`
ZINC2516963	1.000	215.4 Da LogP 4.09 TPSA 23.1	✓ Ro5	✓ Clean	`CCCCCCCCCCC[N+](C)(C)[O-]`
ZINC72399572	0.733	492.7 Da LogP 3.43 TPSA 93.0	✓ Ro5	✓ Clean	`C[C@H](CCC(=O)NCCCN(C)C)[C@H]1CC[C@H]2[C@H]3[C@…`
ZINC1889002139	0.703	449.7 Da LogP 3.89 TPSA 89.8	✓ Ro5	✓ Clean	`CCCNC(=O)CC[C@@H](C)[C@H]1CC[C@@H]2[C@H]3[C@H](…`
ZINC1889002140	0.703	449.7 Da LogP 3.89 TPSA 89.8	✓ Ro5	✓ Clean	`CCCNC(=O)CC[C@@H](C)[C@H]1CC[C@@H]2[C@H]3[C@H](…`
ZINC1889002141	0.703	449.7 Da LogP 3.89 TPSA 89.8	✓ Ro5	✓ Clean	`CCCNC(=O)CC[C@@H](C)[C@H]1CC[C@@H]2[C@@H]3[C@H]…`
ZINC1889002142	0.703	449.7 Da LogP 3.89 TPSA 89.8	✓ Ro5	✓ Clean	`CCCNC(=O)CC[C@@H](C)[C@H]1CC[C@@H]2[C@@H]3[C@H]…`
ZINC118912648	0.658	465.6 Da LogP 2.56 TPSA 127.1	✓ Ro5	✓ Clean	`C[C@@H](CCC(=O)NCC(=O)O)[C@H]1CC[C@H]2[C@H]3[C@…`
ZINC118912649	0.658	465.6 Da LogP 2.56 TPSA 127.1	✓ Ro5	✓ Clean	`C[C@H](CCC(=O)NCC(=O)O)[C@H]1CC[C@H]2[C@H]3[C@H…`
ZINC118912650	0.658	465.6 Da LogP 2.56 TPSA 127.1	✓ Ro5	✓ Clean	`C[C@@H](CCC(=O)NCC(=O)O)[C@H]1CC[C@H]2[C@H]3[C@…`
ZINC118912651	0.658	465.6 Da LogP 2.56 TPSA 127.1	✓ Ro5	✓ Clean	`C[C@H](CCC(=O)NCC(=O)O)[C@H]1CC[C@H]2[C@H]3[C@H…`
ZINC118913700	0.658	465.6 Da LogP 2.56 TPSA 127.1	✓ Ro5	✓ Clean	`C[C@@H](CCC(=O)NCC(=O)O)[C@H]1CC[C@H]2[C@@H]3[C…`
ZINC118913701	0.658	465.6 Da LogP 2.56 TPSA 127.1	✓ Ro5	✓ Clean	`C[C@H](CCC(=O)NCC(=O)O)[C@H]1CC[C@H]2[C@@H]3[C@…`
ZINC17654510	0.658	465.6 Da LogP 2.56 TPSA 127.1	✓ Ro5	✓ Clean	`C[C@H](CCC(=O)NCC(=O)O)[C@H]1CC[C@H]2[C@@H]3[C@…`
ZINC1857777516	0.658	465.6 Da LogP 2.56 TPSA 127.1	✓ Ro5	✓ Clean	`C[C@@H](CCC(=O)NCC(=O)O)[C@@H]1CC[C@H]2[C@H]3[C…`
ZINC2060999620	0.658	465.6 Da LogP 2.56 TPSA 127.1	✓ Ro5	✓ Clean	`C[C@H](CCC(=O)NCC(=O)O)[C@H]1CC[C@H]2[C@@H]3[C@…`
ZINC2060999621	0.658	465.6 Da LogP 2.56 TPSA 127.1	✓ Ro5	✓ Clean	`C[C@H](CCC(=O)NCC(=O)O)[C@H]1CC[C@H]2[C@@H]3[C@…`
ZINC2060999622	0.658	465.6 Da LogP 2.56 TPSA 127.1	✓ Ro5	✓ Clean	`C[C@H](CCC(=O)NCC(=O)O)[C@H]1CC[C@H]2[C@@H]3[C@…`
ZINC253497644	0.658	465.6 Da LogP 2.56 TPSA 127.1	✓ Ro5	✓ Clean	`C[C@H](CCC(=O)NCC(=O)O)[C@@H]1CC[C@@H]2[C@H]3[C…`
ZINC253497645	0.658	465.6 Da LogP 2.56 TPSA 127.1	✓ Ro5	✓ Clean	`C[C@H](CCC(=O)NCC(=O)O)[C@@H]1CC[C@@H]2[C@H]3[C…`
ZINC253497646	0.658	465.6 Da LogP 2.56 TPSA 127.1	✓ Ro5	✓ Clean	`C[C@@H](CCC(=O)NCC(=O)O)[C@@H]1CC[C@@H]2[C@H]3[…`
ZINC253497647	0.658	465.6 Da LogP 2.56 TPSA 127.1	✓ Ro5	✓ Clean	`C[C@@H](CCC(=O)NCC(=O)O)[C@@H]1CC[C@@H]2[C@H]3[…`
ZINC253608430	0.658	465.6 Da LogP 2.56 TPSA 127.1	✓ Ro5	✓ Clean	`C[C@H](CCC(=O)NCC(=O)O)[C@H]1CC[C@@H]2[C@@H]3[C…`
ZINC253615012	0.658	465.6 Da LogP 2.56 TPSA 127.1	✓ Ro5	✓ Clean	`C[C@H](CCC(=O)NCC(=O)O)[C@@H]1CC[C@@H]2[C@@H]3[…`
ZINC253615013	0.658	465.6 Da LogP 2.56 TPSA 127.1	✓ Ro5	✓ Clean	`C[C@H](CCC(=O)NCC(=O)O)[C@@H]1CC[C@@H]2[C@@H]3[…`
ZINC253615014	0.658	465.6 Da LogP 2.56 TPSA 127.1	✓ Ro5	✓ Clean	`C[C@H](CCC(=O)NCC(=O)O)[C@@H]1CC[C@@H]2[C@@H]3[…`
ZINC253615015	0.658	465.6 Da LogP 2.56 TPSA 127.1	✓ Ro5	✓ Clean	`C[C@H](CCC(=O)NCC(=O)O)[C@@H]1CC[C@@H]2[C@@H]3[…`
ZINC38144567	0.658	465.6 Da LogP 2.56 TPSA 127.1	✓ Ro5	✓ Clean	`C[C@H](CCC(=O)NCC(=O)O)[C@H]1CC[C@H]2[C@@H]3[C@…`
ZINC40164193	0.658	465.6 Da LogP 2.56 TPSA 127.1	✓ Ro5	✓ Clean	`C[C@H](CCC(=O)NCC(=O)O)[C@H]1CC[C@H]2[C@H]3[C@H…`
ZINC53683926	0.658	465.6 Da LogP 2.56 TPSA 127.1	✓ Ro5	✓ Clean	`C[C@H](CCC(=O)NCC(=O)O)[C@@H]1CC[C@H]2[C@H]3[C@…`
ZINC61389426	0.658	465.6 Da LogP 2.56 TPSA 127.1	✓ Ro5	✓ Clean	`C[C@H](CCC(=O)NCC(=O)O)[C@H]1CC[C@@H]2[C@H]3[C@…`
ZINC61389432	0.658	465.6 Da LogP 2.56 TPSA 127.1	✓ Ro5	✓ Clean	`C[C@H](CCC(=O)NCC(=O)O)[C@H]1CC[C@@H]2[C@@H]3[C…`
ZINC80852657	0.658	465.6 Da LogP 2.56 TPSA 127.1	✓ Ro5	✓ Clean	`C[C@H](CCC(=O)NCC(=O)O)[C@H]1CC[C@@H]2[C@H]3[C@…`
ZINC8143774	0.658	465.6 Da LogP 2.56 TPSA 127.1	✓ Ro5	✓ Clean	`C[C@H](CCC(=O)NCC(=O)O)[C@H]1CC[C@H]2[C@H]3[C@H…`
ZINC85426221	0.658	465.6 Da LogP 2.56 TPSA 127.1	✓ Ro5	✓ Clean	`C[C@H](CCC(=O)NCC(=O)O)[C@H]1CC[C@@H]2[C@@H]3[C…`
ZINC85426225	0.658	465.6 Da LogP 2.56 TPSA 127.1	✓ Ro5	✓ Clean	`C[C@H](CCC(=O)NCC(=O)O)[C@H]1CC[C@@H]2[C@H]3[C@…`
ZINC1888994477	0.649	447.7 Da LogP 3.67 TPSA 89.8	✓ Ro5	✓ Clean	`C=CCNC(=O)CC[C@@H](C)[C@H]1CC[C@@H]2[C@H]3[C@H]…`
ZINC1888994478	0.649	447.7 Da LogP 3.67 TPSA 89.8	✓ Ro5	✓ Clean	`C=CCNC(=O)CC[C@@H](C)[C@H]1CC[C@@H]2[C@H]3[C@H]…`
ZINC1888994479	0.649	447.7 Da LogP 3.67 TPSA 89.8	✓ Ro5	✓ Clean	`C=CCNC(=O)CC[C@@H](C)[C@H]1CC[C@@H]2[C@@H]3[C@H…`
ZINC1888994480	0.649	447.7 Da LogP 3.67 TPSA 89.8	✓ Ro5	✓ Clean	`C=CCNC(=O)CC[C@@H](C)[C@H]1CC[C@@H]2[C@@H]3[C@H…`
ZINC1636271	0.622	408.6 Da LogP 3.45 TPSA 98.0	✓ Ro5	✓ Clean	`C[C@H](CCC(=O)O)[C@@H]1CC[C@@H]2[C@@H]3[C@H](O)…`
ZINC1857524335	0.622	408.6 Da LogP 3.45 TPSA 98.0	✓ Ro5	✓ Clean	`C[C@@H](CCC(=O)O)[C@@H]1CC[C@H]2[C@H]3[C@H](C[C…`
ZINC2060993464	0.622	408.6 Da LogP 3.45 TPSA 98.0	✓ Ro5	✓ Clean	`C[C@@H](CCC(=O)O)[C@@H]1CC[C@H]2[C@@H]3[C@H](O)…`
ZINC253497475	0.622	408.6 Da LogP 3.45 TPSA 98.0	✓ Ro5	✓ Clean	`C[C@H](CCC(=O)O)[C@@H]1CC[C@@H]2[C@H]3[C@H](O)C…`
ZINC253536099	0.622	408.6 Da LogP 3.45 TPSA 98.0	✓ Ro5	✓ Clean	`C[C@@H](CCC(=O)O)[C@@H]1CC[C@@H]2[C@@H]3[C@H](C…`
ZINC257354841	0.622	408.6 Da LogP 3.45 TPSA 98.0	✓ Ro5	✓ Clean	`C[C@H](CCC(=O)O)[C@@H]1CC[C@@H]2[C@H]3[C@H](C[C…`
ZINC43352176	0.622	408.6 Da LogP 3.45 TPSA 98.0	✓ Ro5	✓ Clean	`C[C@@H](CCC(=O)O)[C@@H]1CC[C@H]2[C@H]3[C@H](C[C…`
ZINC70691804	0.622	408.6 Da LogP 3.45 TPSA 98.0	✓ Ro5	✓ Clean	`C[C@H](CCC(=O)O)[C@H]1CC[C@@H]2[C@@H]3[C@H](O)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.