Protein profile

KP13_00548

Vitamin B12 transporter btuB

Genome: KpKP13

Gene: btuB AHE47024.1 Structure source: AlphaFold + ColabFold UniProt A0A0H3GKA3

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Amino acids 612

Annotations 8

Features 27

PDB binders 15

Druggability 0.495

Overview

Basic information about this protein and its source genome.

Accession: KP13_00548
Assembly: Klebsiella pneumoniae subsp. pneumoniae Kp13, complete sequence
Gene: btuB AHE47024.1
Status: annotated
Amino acids: 612
Structure source: AlphaFold + ColabFold

GO:0016020 A lipid bilayer along with all the proteins and protein complexes embedded in it and attached to it. GO:0015420 Enables the transfer of a solute or solutes from one side of a membrane to the other according to the reaction: vitamin B12(out) + ATP + H2O = ADP + an vitamin B12(in) + H+ + phosphate. Vitamin B12 is alkylcob(III)alamin. GO:0015889 The directed movement of cobalamin (vitamin B12), a water-soluble vitamin characterized by possession of a corrin nucleus containing a cobalt atom, into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore. 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:0046930 A protein complex providing a discrete opening in a membrane that allows the passage of gases and/or liquids. GO:0046872 Binding to a metal ion.

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: OuterMembrane
ColabFold pLDDT: 92.57

Selected Druggability evidence

AlphaFold / UniProt 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 0.495

Structure A0A0H3GKA3

Pocket Pocket 11

P2Rank 0.895

Structure A0A0H3GKA3

Pocket Pocket 1

ColabFold model

FPocket 0.678 · Pocket 44

P2Rank 0.945 · Pocket 1

Core conservation Accessory gene

Roary accessory

CoreCruncher accessory

Gut microbiome 103 / 4744 genomes with a hit

Normalized 0.022

Sequence

Primary amino-acid sequence viewer.

Functional Annotations

Enzyme classification and Gene Ontology terms linked to this protein.

8 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:0015420 Enables the transfer of a solute or solutes from one side of a membrane to the other according to the reaction: vitamin B12(out) + ATP + H2O = ADP + an vitamin B12(in) + H+ + phosphate. Vitamin B12 is alkylcob(III)alamin.
GO:0015889 The directed movement of cobalamin (vitamin B12), a water-soluble vitamin characterized by possession of a corrin nucleus containing a cobalt atom, into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore.
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:0046930 A protein complex providing a discrete opening in a membrane that allows the passage of gases and/or liquids.
GO:0046872 Binding to a metal ion.
GO:0015288 Enables the transfer of substances, sized less than 1000 Da, from one side of a membrane to the other. The transmembrane portions of porins consist exclusively of beta-strands which form a beta-barrel. They are found in the outer membranes of Gram-negative bacteria, mitochondria, plastids and possibly acid-fast Gram-positive bacteria.
GO:0006811 The directed movement of a monoatomic ion into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore. Monatomic ions (also called simple ions) are ions consisting of exactly one atom.

Sequence Features

Domain/signature hits from InterPro and related databases.

27 records

Show feature table

Start	End	DB	Term	Name
172	611	Pfam	PF00593	TonB dependent receptor
172	611	InterPro	IPR000531	TonB-dependent receptor-like, beta-barrel
1	22	SignalP_GRAM_POSITIVE	SignalP-TM	SignalP-TM
41	146	Pfam	PF07715	TonB-dependent Receptor Plug Domain
41	146	InterPro	IPR012910	TonB-dependent receptor, plug domain
2	612	Hamap	MF_01531	Vitamin B12 transporter BtuB [btuB].
2	612	InterPro	IPR010101	TonB-dependent vitamin B12 transporter BtuB
5	16	Phobius	SIGNAL_PEPTIDE_H_REGION	Hydrophobic region of a signal peptide.
1	20	Phobius	SIGNAL_PEPTIDE	Signal peptide region
26	612	SUPERFAMILY	SSF56935	Porins
155	612	Gene3D	G3DSA:2.40.170.20	-
155	612	InterPro	IPR036942	TonB-dependent receptor-like, beta-barrel domain superfamily
595	612	ProSitePatterns	PS01156	TonB-dependent receptor proteins signature 2.
595	612	InterPro	IPR010917	TonB-dependent receptor, conserved site
45	612	CDD	cd01347	ligand_gated_channel
1	33	ProSitePatterns	PS00430	TonB-dependent receptor proteins signature 1.
1	33	InterPro	IPR010916	TonB box, conserved site
1	20	SignalP_EUK	SignalP-noTM	SignalP-noTM
13	612	PANTHER	PTHR30069	TONB-DEPENDENT OUTER MEMBRANE RECEPTOR
13	612	InterPro	IPR039426	TonB-dependent receptor-like
17	20	Phobius	SIGNAL_PEPTIDE_C_REGION	C-terminal region of a signal peptide.
19	154	Gene3D	G3DSA:2.170.130.10	-
19	154	InterPro	IPR037066	TonB-dependent receptor, plug domain superfamily
27	150	FunFam	G3DSA:2.170.130.10:FF:000002	Vitamin B12 transporter BtuB
21	612	Phobius	NON_CYTOPLASMIC_DOMAIN	Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
2	612	NCBIfam	TIGR01779	TonB-dependent vitamin B12 receptor
1	4	Phobius	SIGNAL_PEPTIDE_N_REGION	N-terminal region of a signal peptide.

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 + 2

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

Entry	Method	Resolution	Chain	Coverage	Links	Status
AlphaFold AF_A0A0H3GKA3	AlphaFold	—	—	full sequence	—	Viewing
ColabFold KP13_00548	ColabFold	—	—	full sequence	—	Loaded

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
11				0.495
13				0.074
57				0.002
16				0.001

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	29.34	0.895
2	29.08	0.894
3	17.17	0.719
4	15.95	0.687
5	11.45	0.528

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
44				0.678
33				0.513
4				0.423
28				0.332

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	22.98	0.885
2	20.64	0.859
3	7.83	0.415
4	6.87	0.353
5	5.74	0.278

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.

65 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
8SW	5NC3	Q05098	692.6 Da LogP -1.77 TPSA 296.0	3 viol.	Alert	`C#CCNC(=O)C(CNC(=O)C(CNC(=O)CNC(=O)c1cccc(c1O)O…`
8T2	5NC4	Q05098	624.6 Da LogP 1.95 TPSA 237.8	2 viol.	Alert	`c1cc(c(c(c1)O)O)C(=O)NCCCC[C@@H](C(=O)NCCCCNC(=…`
95B	5NR2	Q05098	418.4 Da LogP 1.29 TPSA 176.4	1 viol.	Alert	`c1cc(c(c(c1)O)O)C(=O)NCCCC[C@@H](C(=O)O)NC(=O)c…`
C8E	5FR8	D0C8V9	306.4 Da LogP 2.41 TPSA 57.2	✓ Ro5	✓ Clean	`CCCCCCCCOCCOCCOCCOCCO`
EB4	6I2J	Q05098	669.6 Da LogP -0.74 TPSA 287.6	3 viol.	Alert	`c1cc(c(c(c1)O)O)C(=O)N[C@H]2COC(=O)[C@H](COC(=O…`
FLC	1PO0	P13036	189.1 Da LogP -5.25 TPSA 140.6	✓ Ro5	✓ Clean	`C(C(=O)[O-])C(CC(=O)[O-])(C(=O)[O-])O`
HEX	2GSK	P06129	86.2 Da LogP 2.59 TPSA 0.0	✓ Ro5	✓ Clean	`CCCCCC`
HTO	1KMO	P13036	148.2 Da LogP -0.11 TPSA 60.7	✓ Ro5	✓ Clean	`CCCC[C@H]([C@@H](CO)O)O`
LDA	2HDI	P17315	229.4 Da LogP 4.48 TPSA 23.1	✓ Ro5	✓ Clean	`CCCCCCCCCCCC[N+](C)(C)[O-]`
LP5	6Q5E	Q05098	711.9 Da LogP 4.91 TPSA 212.3	2 viol.	✓ Clean	`CCCCCCCCCCC[C@H](CC(=O)N[C@@H]1[C@H]([C@@H]([C@…`
MPG	2GUF	P06129	356.5 Da LogP 4.92 TPSA 66.8	✓ Ro5	✓ Clean	`CCCCCCCC/C=C\CCCCCCCCOC(=O)[C@@H](CO)O`
MTN	3RGM	P06129	264.4 Da LogP 1.82 TPSA 57.3	✓ Ro5	✓ Clean	`CC1(C=C(C(N1[O])(C)C)CSS(=O)(=O)C)C`
OCT	2GSK	P06129	114.2 Da LogP 3.37 TPSA 0.0	✓ Ro5	✓ Clean	`CCCCCCCC`
OES	2HDF	P17315	206.4 Da LogP 2.09 TPSA 37.3	✓ Ro5	✓ Clean	`CCCCCCCC[S@@](=O)CCO`
OWT	6Y47	Q05098	963.0 Da LogP 1.10 TPSA 299.6	3 viol.	Alert	`CC(=O)NCC1CN(C(=O)O1)c2ccc(c(c2)F)N3CCN(CC3)C(=…`

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
ZINC100014200	1.000	494.7 Da LogP 4.02 TPSA 84.8	✓ Ro5	✓ Clean	`CCCCCCCCCCCCOCCOCCOCCOCCOCCOCCOCCO`
ZINC100070166	1.000	290.4 Da LogP 3.17 TPSA 47.9	✓ Ro5	✓ Clean	`CCCCCCCCCCOCCOCCOCCO`
ZINC100310628	1.000	478.7 Da LogP 4.78 TPSA 75.6	✓ Ro5	✓ Clean	`CCCCCCCCCCCCCCOCCOCCOCCOCCOCCOCCO`
ZINC100365196	1.000	302.5 Da LogP 4.71 TPSA 38.7	✓ Ro5	✓ Clean	`CCCCCCCCCCCCCCOCCOCCO`
ZINC101772322	1.000	434.7 Da LogP 4.76 TPSA 66.4	✓ Ro5	✓ Clean	`CCCCCCCCCCCCCCOCCOCCOCCOCCOCCO`
ZINC103600921	1.000	466.7 Da LogP 3.24 TPSA 84.8	✓ Ro5	✓ Clean	`CCCCCCCCCCOCCOCCOCCOCCOCCOCCOCCO`
ZINC14880431	1.000	378.6 Da LogP 3.20 TPSA 66.4	✓ Ro5	✓ Clean	`CCCCCCCCCCOCCOCCOCCOCCOCCO`
ZINC14881140	1.000	306.4 Da LogP 2.41 TPSA 57.2	✓ Ro5	✓ Clean	`CCCCCCCCOCCOCCOCCOCCO`
ZINC16051619	1.000	350.5 Da LogP 2.42 TPSA 66.4	✓ Ro5	✓ Clean	`CCCCCCCCOCCOCCOCCOCCOCCO`
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-]`
ZINC2584424	1.000	218.3 Da LogP 2.37 TPSA 38.7	✓ Ro5	✓ Clean	`CCCCCCCCOCCOCCO`
ZINC4521877	1.000	234.3 Da LogP 1.61 TPSA 47.9	✓ Ro5	✓ Clean	`CCCCCCOCCOCCOCCO`
ZINC5273610	1.000	322.4 Da LogP 1.64 TPSA 66.4	✓ Ro5	✓ Clean	`CCCCCCOCCOCCOCCOCCOCCO`
ZINC58538366	1.000	392.6 Da LogP 3.59 TPSA 66.4	✓ Ro5	✓ Clean	`CCCCCCCCCCCOCCOCCOCCOCCOCCO`
ZINC58631420	1.000	422.6 Da LogP 3.22 TPSA 75.6	✓ Ro5	✓ Clean	`CCCCCCCCCCOCCOCCOCCOCCOCCOCCO`
ZINC59441819	1.000	318.5 Da LogP 3.95 TPSA 47.9	✓ Ro5	✓ Clean	`CCCCCCCCCCCCOCCOCCOCCO`
ZINC59622400	1.000	274.4 Da LogP 3.93 TPSA 38.7	✓ Ro5	✓ Clean	`CCCCCCCCCCCCOCCOCCO`
ZINC71788551	1.000	334.5 Da LogP 3.19 TPSA 57.2	✓ Ro5	✓ Clean	`CCCCCCCCCCOCCOCCOCCOCCO`
ZINC71788564	1.000	262.4 Da LogP 2.39 TPSA 47.9	✓ Ro5	✓ Clean	`CCCCCCCCOCCOCCOCCO`
ZINC71788567	1.000	406.6 Da LogP 3.98 TPSA 66.4	✓ Ro5	✓ Clean	`CCCCCCCCCCCCOCCOCCOCCOCCOCCO`
ZINC8214594	1.000	362.6 Da LogP 3.97 TPSA 57.2	✓ Ro5	✓ Clean	`CCCCCCCCCCCCOCCOCCOCCOCCO`
ZINC88260008	1.000	390.6 Da LogP 4.75 TPSA 57.2	✓ Ro5	✓ Clean	`CCCCCCCCCCCCCCOCCOCCOCCOCCO`
ZINC95784968	1.000	450.7 Da LogP 4.00 TPSA 75.6	✓ Ro5	✓ Clean	`CCCCCCCCCCCCOCCOCCOCCOCCOCCOCCO`
ZINC95863931	1.000	464.7 Da LogP 4.39 TPSA 75.6	✓ Ro5	✓ Clean	`CCCCCCCCCCCCCOCCOCCOCCOCCOCCOCCO`
ZINC1849711	0.950	202.3 Da LogP 3.14 TPSA 29.5	✓ Ro5	✓ Clean	`CCCCCCCCCCOCCO`
ZINC1850542	0.950	216.4 Da LogP 3.53 TPSA 29.5	✓ Ro5	✓ Clean	`CCCCCCCCCCCOCCO`
ZINC2555269	0.950	220.3 Da LogP 1.22 TPSA 47.9	✓ Ro5	✓ Clean	`CCCCCOCCOCCOCCO`
ZINC59660505	0.950	244.4 Da LogP 4.31 TPSA 29.5	✓ Ro5	✓ Clean	`CCCCCCCCCCCCCOCCO`
ZINC8437287	0.950	230.4 Da LogP 3.92 TPSA 29.5	✓ Ro5	✓ Clean	`CCCCCCCCCCCCOCCO`
ZINC85733754	0.950	258.4 Da LogP 4.70 TPSA 29.5	✓ Ro5	✓ Clean	`CCCCCCCCCCCCCCOCCO`
ZINC1644613	0.810	206.3 Da LogP 0.83 TPSA 47.9	✓ Ro5	✓ Clean	`CCCCOCCOCCOCCO`
ZINC3650087	0.805	418.4 Da LogP 1.29 TPSA 176.4	1 viol.	Alert	`O=C(NCCCC[C@H](NC(=O)c1cccc(O)c1O)C(=O)O)c1cccc…`
ZINC59545536	0.773	258.4 Da LogP 4.70 TPSA 29.5	✓ Ro5	✓ Clean	`CCCCCCCCCCCCCOCCCO`
ZINC95831576	0.773	230.4 Da LogP 3.92 TPSA 29.5	✓ Ro5	✓ Clean	`CCCCCCCCCCOCCCCO`
ZINC1532902	0.700	206.2 Da LogP -0.86 TPSA 132.1	✓ Ro5	✓ Clean	`O=C(O)CC[C@@](O)(CC(=O)O)C(=O)O`
ZINC1627284	0.700	214.4 Da LogP 4.94 TPSA 9.2	✓ Ro5	✓ Clean	`CCCCCCCOCCCCCCC`
ZINC2018106	0.700	206.2 Da LogP -0.86 TPSA 132.1	✓ Ro5	✓ Clean	`O=C(O)CC[C@](O)(CC(=O)O)C(=O)O`
ZINC2564179	0.700	214.4 Da LogP 4.94 TPSA 9.2	✓ Ro5	✓ Clean	`CCCCCCCCOCCCCCC`
ZINC4102415	0.682	404.4 Da LogP 1.20 TPSA 159.3	1 viol.	Alert	`O=C(NCCCC[C@@H](CO)NC(=O)c1cccc(O)c1O)c1cccc(O)…`
ZINC3593496	0.652	206.2 Da LogP -1.16 TPSA 121.1	✓ Ro5	✓ Clean	`COC(=O)C[C@@](O)(CC(=O)O)C(=O)O`
ZINC3593497	0.652	206.2 Da LogP -1.16 TPSA 121.1	✓ Ro5	✓ Clean	`COC(=O)C[C@](O)(CC(=O)O)C(=O)O`
ZINC95933635	0.636	228.3 Da LogP -1.14 TPSA 74.6	✓ Ro5	✓ Clean	`O=[S@@](CCO)CCC[S@@](=O)CCO`
ZINC95933636	0.636	228.3 Da LogP -1.14 TPSA 74.6	✓ Ro5	✓ Clean	`O=[S@@](CCO)CCC[S@](=O)CCO`
ZINC95933637	0.636	228.3 Da LogP -1.14 TPSA 74.6	✓ Ro5	✓ Clean	`O=[S@](CCO)CCC[S@](=O)CCO`
ZINC14686440	0.625	436.4 Da LogP -2.64 TPSA 247.9	1 viol.	✓ Clean	`O=C(O)C[C@](O)(CC(=O)NCCCCNC(=O)C[C@@](O)(CC(=O…`
ZINC14686442	0.625	436.4 Da LogP -2.64 TPSA 247.9	1 viol.	✓ Clean	`O=C(O)C[C@@](O)(CC(=O)NCCCCNC(=O)C[C@](O)(CC(=O…`
ZINC14686444	0.625	436.4 Da LogP -2.64 TPSA 247.9	1 viol.	✓ Clean	`O=C(O)C[C@@](O)(CC(=O)NCCCCNC(=O)C[C@@](O)(CC(=…`

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.