Protein profile

VK055_4196

ammonium Transporter family protein

Genome: KpATCC43816

Gene: AIK82741.1 Structure source: ColabFold

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Amino acids 359

Annotations 3

Features 37

PDB binders 6

Druggability 0.435

Overview

Basic information about this protein and its source genome.

Accession: VK055_4196
Assembly: Klebsiella pneumoniae subsp. pneumoniae strain ATCC 43816 KPPR1, complete genome
Gene: AIK82741.1
Status: annotated
Amino acids: 359
Structure source: ColabFold

GO:0016020 A lipid bilayer along with all the proteins and protein complexes embedded in it and attached to it. GO:0072488 The process in which ammonium is transported across a membrane. Ammonium is the cation NH4+. GO:0008519 Enables the energy-independent facilitated diffusion of ammonium through a transmembrane aqueous pore or channel.

Target profile

Computed evidence for target prioritization.

Human off-target: No hit
Human identity (%): 0.0
Gut microbiome off-target: hit
Essential (DEG): N
DEG identity (%): 0.0
Localization: CytoplasmicMembrane
ColabFold pLDDT: 88.22

Selected Druggability evidence

ColabFold / curated model

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 0.435

Structure CB_VK055_4196

Pocket Pocket 3

P2Rank 0.651

Structure CB_VK055_4196

Pocket Pocket 1

ColabFold model

FPocket 0.435 · Pocket 3

P2Rank 0.651 · Pocket 1

Core conservation Accessory gene

Roary accessory

CoreCruncher accessory

Gut microbiome 11 / 4744 genomes with a hit

Normalized 0.002

Sequence

Primary amino-acid sequence viewer.

Functional Annotations

Enzyme classification and Gene Ontology terms linked to this protein.

3 GO

Gene Ontology (GO)

GO:0016020 A lipid bilayer along with all the proteins and protein complexes embedded in it and attached to it.
GO:0072488 The process in which ammonium is transported across a membrane. Ammonium is the cation NH4+.
GO:0008519 Enables the energy-independent facilitated diffusion of ammonium through a transmembrane aqueous pore or channel.

Sequence Features

Domain/signature hits from InterPro and related databases.

37 records

Show feature table

Start	End	DB	Term	Name
257	267	Phobius	CYTOPLASMIC_DOMAIN	Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
138	159	Phobius	TRANSMEMBRANE	Region of a membrane-bound protein predicted to be embedded in the membrane.
132	137	Phobius	CYTOPLASMIC_DOMAIN	Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
136	158	TMHMM	TMhelix	Region of a membrane-bound protein predicted to be embedded in the membrane.
225	235	Phobius	NON_CYTOPLASMIC_DOMAIN	Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
173	195	TMHMM	TMhelix	Region of a membrane-bound protein predicted to be embedded in the membrane.
1	16	Phobius	NON_CYTOPLASMIC_DOMAIN	Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
112	131	Phobius	TRANSMEMBRANE	Region of a membrane-bound protein predicted to be embedded in the membrane.
206	224	Phobius	TRANSMEMBRANE	Region of a membrane-bound protein predicted to be embedded in the membrane.
171	194	Phobius	TRANSMEMBRANE	Region of a membrane-bound protein predicted to be embedded in the membrane.
207	224	TMHMM	TMhelix	Region of a membrane-bound protein predicted to be embedded in the membrane.
195	205	Phobius	CYTOPLASMIC_DOMAIN	Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
58	80	TMHMM	TMhelix	Region of a membrane-bound protein predicted to be embedded in the membrane.
7	328	Gene3D	G3DSA:1.10.3430.10	Ammonium transporter AmtB like domains
7	328	InterPro	IPR029020	Ammonium/urea transporter
236	256	Phobius	TRANSMEMBRANE	Region of a membrane-bound protein predicted to be embedded in the membrane.
17	37	Phobius	TRANSMEMBRANE	Region of a membrane-bound protein predicted to be embedded in the membrane.
12	328	PANTHER	PTHR43029	AMMONIUM TRANSPORTER MEP2
12	328	InterPro	IPR001905	Ammonium transporter
15	37	TMHMM	TMhelix	Region of a membrane-bound protein predicted to be embedded in the membrane.
234	256	TMHMM	TMhelix	Region of a membrane-bound protein predicted to be embedded in the membrane.
17	327	Pfam	PF00909	Ammonium Transporter Family
17	327	InterPro	IPR024041	Ammonium transporter AmtB-like domain
288	292	Phobius	NON_CYTOPLASMIC_DOMAIN	Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
12	328	SUPERFAMILY	SSF111352	Ammonium transporter
268	287	Phobius	TRANSMEMBRANE	Region of a membrane-bound protein predicted to be embedded in the membrane.
160	170	Phobius	NON_CYTOPLASMIC_DOMAIN	Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
293	311	Phobius	TRANSMEMBRANE	Region of a membrane-bound protein predicted to be embedded in the membrane.
268	290	TMHMM	TMhelix	Region of a membrane-bound protein predicted to be embedded in the membrane.
68	111	Phobius	NON_CYTOPLASMIC_DOMAIN	Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
172	197	ProSitePatterns	PS01219	Ammonium transporters signature.
172	197	InterPro	IPR018047	Ammonium transporter, conserved site
38	48	Phobius	CYTOPLASMIC_DOMAIN	Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
107	129	TMHMM	TMhelix	Region of a membrane-bound protein predicted to be embedded in the membrane.
294	311	TMHMM	TMhelix	Region of a membrane-bound protein predicted to be embedded in the membrane.
312	359	Phobius	CYTOPLASMIC_DOMAIN	Region of a membrane-bound protein predicted to be outside the membrane, in the cytoplasm.
49	67	Phobius	TRANSMEMBRANE	Region of a membrane-bound protein predicted to be embedded in the membrane.

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
ColabFold VK055_4196	ColabFold	—	—	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
3				0.435
20				0.002
21				0.002

Pockets (P2RANK)

Showing top-ranked P2Rank candidates by probability. Probability is color-coded per P2Rank calibration: high (≥ 0.5), medium (0.2 – 0.49), low (< 0.2).

P2RANK	Score	Probability
1	14.75	0.651
2	6.95	0.3
3	5.76	0.232
4	5.34	0.207
5	5.16	0.196

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.

58 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
DMU	5AH3	Q59UP8	482.6 Da LogP -1.23 TPSA 178.5	2 viol.	✓ Clean	`CCCCCCCCCCO[C@H]1[C@@H]([C@H]([C@@H]([C@H](O1)C…`
LMT	6EU6	Q1Q357	510.6 Da LogP -0.45 TPSA 178.5	3 viol.	✓ Clean	`CCCCCCCCCCCCO[C@H]1[C@@H]([C@H]([C@@H]([C@H](O1…`
NH4	6EU6	Q1Q357	18.0 Da LogP 0.38 TPSA 36.5	✓ Ro5	✓ Clean	`[NH4+]`
NME	1U7C	P69681	31.1 Da LogP -0.43 TPSA 26.0	✓ Ro5	✓ Clean	`CN`
XE	2B2J	O29285	131.3 Da LogP 0.00 TPSA 0.0	✓ Ro5	✓ Clean	`[Xe]`
ZDM	6EU6	Q1Q357	468.5 Da LogP -1.62 TPSA 178.5	2 viol.	✓ Clean	`CCCCCCCCCO[C@H]1[C@@H]([C@H]([C@@H]([C@H](O1)CO…`

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
CHEMBL1318350	P41948	—	530.5 Da LogP 3.60 TPSA 7.1	1 viol.	Alert	`CCN1/C(=C/c2ccc3cc(C)ccc3[n+]2CC)Sc2ccc3sccc3c2…`
CHEMBL1990694	P41948	—	332.4 Da LogP 4.26 TPSA 52.9	✓ Ro5	✓ Clean	`CCCC/N=C1\C(=O)N(C)c2cccc3c(O)c4ccccc4c1c23`

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
ZINC100053689	1.000	482.6 Da LogP -1.23 TPSA 178.5	2 viol.	✓ Clean	`CCCCCCCCCCO[C@H]1O[C@H](CO)[C@@H](O[C@H]2O[C@H]…`
ZINC100053691	1.000	496.6 Da LogP -0.84 TPSA 178.5	2 viol.	✓ Clean	`CCCCCCCCCCCO[C@H]1O[C@H](CO)[C@@H](O[C@H]2O[C@H…`
ZINC1501015302	1.000	482.6 Da LogP -1.23 TPSA 178.5	2 viol.	✓ Clean	`CCCCCCCCCCO[C@@H]1O[C@H](CO)[C@@H](O[C@H]2O[C@H…`
ZINC2039285652	1.000	454.5 Da LogP -2.01 TPSA 178.5	2 viol.	✓ Clean	`CCCCCCCCO[C@H]1O[C@H](CO)[C@H](O[C@@H]2O[C@H](C…`
ZINC2039285653	1.000	454.5 Da LogP -2.01 TPSA 178.5	2 viol.	✓ Clean	`CCCCCCCCO[C@H]1O[C@H](CO)[C@H](O[C@@H]2O[C@H](C…`
ZINC2039285654	1.000	454.5 Da LogP -2.01 TPSA 178.5	2 viol.	✓ Clean	`CCCCCCCCO[C@H]1O[C@H](CO)[C@H](O[C@@H]2O[C@H](C…`
ZINC2039285655	1.000	454.5 Da LogP -2.01 TPSA 178.5	2 viol.	✓ Clean	`CCCCCCCCO[C@H]1O[C@H](CO)[C@H](O[C@@H]2O[C@H](C…`
ZINC2053493146	1.000	482.6 Da LogP -1.23 TPSA 178.5	2 viol.	✓ Clean	`CCCCCCCCCCO[C@H]1O[C@H](CO)[C@H](O[C@@H]2O[C@H]…`
ZINC2053493147	1.000	482.6 Da LogP -1.23 TPSA 178.5	2 viol.	✓ Clean	`CCCCCCCCCCO[C@H]1O[C@H](CO)[C@H](O[C@@H]2O[C@H]…`
ZINC2053493148	1.000	482.6 Da LogP -1.23 TPSA 178.5	2 viol.	✓ Clean	`CCCCCCCCCCO[C@H]1O[C@H](CO)[C@H](O[C@@H]2O[C@H]…`
ZINC2053493149	1.000	482.6 Da LogP -1.23 TPSA 178.5	2 viol.	✓ Clean	`CCCCCCCCCCO[C@H]1O[C@H](CO)[C@H](O[C@@H]2O[C@H]…`
ZINC238809244	1.000	510.6 Da LogP -0.45 TPSA 178.5	3 viol.	✓ Clean	`CCCCCCCCCCCCO[C@@H]1O[C@H](CO)[C@@H](O[C@H]2O[C…`
ZINC238809245	1.000	510.6 Da LogP -0.45 TPSA 178.5	3 viol.	✓ Clean	`CCCCCCCCCCCCO[C@@H]1O[C@H](CO)[C@@H](O[C@H]2O[C…`
ZINC252695223	1.000	482.6 Da LogP -1.23 TPSA 178.5	2 viol.	✓ Clean	`CCCCCCCCCCO[C@@H]1O[C@H](CO)[C@@H](O[C@H]2O[C@H…`
ZINC252695224	1.000	482.6 Da LogP -1.23 TPSA 178.5	2 viol.	✓ Clean	`CCCCCCCCCCO[C@@H]1O[C@H](CO)[C@@H](O[C@H]2O[C@H…`
ZINC252695225	1.000	482.6 Da LogP -1.23 TPSA 178.5	2 viol.	✓ Clean	`CCCCCCCCCCO[C@@H]1O[C@H](CO)[C@@H](O[C@H]2O[C@H…`
ZINC252695226	1.000	482.6 Da LogP -1.23 TPSA 178.5	2 viol.	✓ Clean	`CCCCCCCCCCO[C@@H]1O[C@H](CO)[C@@H](O[C@H]2O[C@H…`
ZINC58649715	1.000	496.6 Da LogP -0.84 TPSA 178.5	2 viol.	✓ Clean	`CCCCCCCCCCCO[C@@H]1O[C@H](CO)[C@@H](O[C@H]2O[C@…`
ZINC59978443	1.000	454.5 Da LogP -2.01 TPSA 178.5	2 viol.	✓ Clean	`CCCCCCCCO[C@@H]1O[C@H](CO)[C@@H](O[C@H]2O[C@H](…`
ZINC66157001	1.000	468.5 Da LogP -1.62 TPSA 178.5	2 viol.	✓ Clean	`CCCCCCCCCO[C@@H]1O[C@H](CO)[C@@H](O[C@H]2O[C@H]…`
ZINC70669940	1.000	482.6 Da LogP -1.23 TPSA 178.5	2 viol.	✓ Clean	`CCCCCCCCCCO[C@@H]1O[C@@H](CO)[C@@H](O[C@H]2O[C@…`
ZINC70669941	1.000	482.6 Da LogP -1.23 TPSA 178.5	2 viol.	✓ Clean	`CCCCCCCCCCO[C@@H]1O[C@@H](CO)[C@@H](O[C@H]2O[C@…`
ZINC70669942	1.000	482.6 Da LogP -1.23 TPSA 178.5	2 viol.	✓ Clean	`CCCCCCCCCCO[C@@H]1O[C@@H](CO)[C@@H](O[C@H]2O[C@…`
ZINC70669943	1.000	482.6 Da LogP -1.23 TPSA 178.5	2 viol.	✓ Clean	`CCCCCCCCCCO[C@@H]1O[C@@H](CO)[C@@H](O[C@H]2O[C@…`
ZINC77311968	1.000	454.5 Da LogP -2.01 TPSA 178.5	2 viol.	✓ Clean	`CCCCCCCCO[C@@H]1O[C@H](CO)[C@@H](O[C@@H]2O[C@H]…`
ZINC83433913	1.000	426.5 Da LogP -2.79 TPSA 178.5	2 viol.	✓ Clean	`CCCCCCO[C@@H]1O[C@H](CO)[C@@H](O[C@H]2O[C@H](CO…`
ZINC85482724	1.000	482.6 Da LogP -1.23 TPSA 178.5	2 viol.	✓ Clean	`CCCCCCCCCCO[C@@H]1O[C@H](CO)[C@@H](O[C@H]2O[C@H…`
ZINC86002923	1.000	426.5 Da LogP -2.79 TPSA 178.5	2 viol.	✓ Clean	`CCCCCCO[C@@H]1O[C@H](CO)[C@H](O[C@H]2O[C@H](CO)…`
ZINC100623033	0.811	334.5 Da LogP 1.33 TPSA 99.4	✓ Ro5	✓ Clean	`CCCCCCCCCCCO[C@H]1O[C@@H](CO)[C@@H](O)[C@@H](O)…`
ZINC100623036	0.811	334.5 Da LogP 1.33 TPSA 99.4	✓ Ro5	✓ Clean	`CCCCCCCCCCCO[C@@H]1O[C@@H](CO)[C@@H](O)[C@@H](O…`
ZINC100623039	0.811	334.5 Da LogP 1.33 TPSA 99.4	✓ Ro5	✓ Clean	`CCCCCCCCCCCO[C@H]1O[C@@H](CO)[C@@H](O)[C@@H](O)…`
ZINC100623040	0.811	334.5 Da LogP 1.33 TPSA 99.4	✓ Ro5	✓ Clean	`CCCCCCCCCCCO[C@@H]1O[C@@H](CO)[C@@H](O)[C@@H](O…`
ZINC105807070	0.811	292.4 Da LogP 0.16 TPSA 99.4	✓ Ro5	✓ Clean	`CCCCCCCCO[C@H]1O[C@H](CO)[C@H](O)[C@@H](O)[C@@H…`
ZINC118906375	0.811	264.3 Da LogP -0.62 TPSA 99.4	✓ Ro5	✓ Clean	`CCCCCCO[C@H]1O[C@H](CO)[C@H](O)[C@@H](O)[C@@H]1O`
ZINC118911494	0.811	278.3 Da LogP -0.23 TPSA 99.4	✓ Ro5	✓ Clean	`CCCCCCCO[C@@H]1O[C@H](CO)[C@H](O)[C@@H](O)[C@@H…`
ZINC118911909	0.811	306.4 Da LogP 0.55 TPSA 99.4	✓ Ro5	✓ Clean	`CCCCCCCCCO[C@H]1O[C@H](CO)[C@H](O)[C@@H](O)[C@@…`
ZINC140974145	0.811	306.4 Da LogP 0.55 TPSA 99.4	✓ Ro5	✓ Clean	`CCCCCCCCCO[C@@H]1O[C@H](CO)[C@H](O)[C@@H](O)[C@…`
ZINC141152247	0.811	264.3 Da LogP -0.62 TPSA 99.4	✓ Ro5	✓ Clean	`CCCCCCO[C@@H]1O[C@H](CO)[C@H](O)[C@@H](O)[C@@H]…`
ZINC141262250	0.811	320.4 Da LogP 0.94 TPSA 99.4	✓ Ro5	✓ Clean	`CCCCCCCCCCO[C@H]1O[C@H](CO)[C@H](O)[C@@H](O)[C@…`
ZINC14880350	0.811	306.4 Da LogP 0.55 TPSA 99.4	✓ Ro5	✓ Clean	`CCCCCCCCCO[C@H]1O[C@@H](CO)[C@@H](O)[C@@H](O)[C…`
ZINC40165555	0.811	292.4 Da LogP 0.16 TPSA 99.4	✓ Ro5	✓ Clean	`CCCCCCCCO[C@@H]1O[C@H](CO)[C@@H](O)[C@H](O)[C@H…`
ZINC4521560	0.811	264.3 Da LogP -0.62 TPSA 99.4	✓ Ro5	✓ Clean	`CCCCCCO[C@@H]1O[C@H](CO)[C@@H](O)[C@H](O)[C@H]1O`
ZINC48016017	0.811	278.3 Da LogP -0.23 TPSA 99.4	✓ Ro5	✓ Clean	`CCCCCCCO[C@@H]1O[C@H](CO)[C@@H](O)[C@H](O)[C@H]…`
ZINC49878458	0.811	306.4 Da LogP 0.55 TPSA 99.4	✓ Ro5	✓ Clean	`CCCCCCCCCO[C@@H]1O[C@@H](CO)[C@@H](O)[C@@H](O)[…`
ZINC53683291	0.811	292.4 Da LogP 0.16 TPSA 99.4	✓ Ro5	✓ Clean	`CCCCCCCCO[C@@H]1O[C@H](CO)[C@H](O)[C@H](O)[C@H]…`
ZINC5820343	0.811	264.3 Da LogP -0.62 TPSA 99.4	✓ Ro5	✓ Clean	`CCCCCCO[C@H]1O[C@H](CO)[C@@H](O)[C@H](O)[C@H]1O`
ZINC58563863	0.811	292.4 Da LogP 0.16 TPSA 99.4	✓ Ro5	✓ Clean	`CCCCCCCCO[C@H]1O[C@H](CO)[C@@H](O)[C@H](O)[C@H]…`
ZINC76945547	0.811	292.4 Da LogP 0.16 TPSA 99.4	✓ Ro5	✓ Clean	`CCCCCCCCO[C@@H]1O[C@H](CO)[C@H](O)[C@@H](O)[C@@…`
ZINC85605815	0.811	348.5 Da LogP 1.72 TPSA 99.4	✓ Ro5	✓ Clean	`CCCCCCCCCCCCO[C@H]1O[C@H](CO)[C@@H](O)[C@H](O)[…`
ZINC94437834	0.811	292.4 Da LogP 0.16 TPSA 99.4	✓ Ro5	✓ Clean	`CCCCCCCCO[C@H]1O[C@H](CO)[C@H](O)[C@H](O)[C@H]1O`

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.