Protein target profile

HT085_RS00105

TonB-dependent iron piracy receptor TdfF

Genome: NZ_AP023069.1 Gene: TUM19854C_00170 tdfF 3D evidence: ColabFold model

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Length 725

Direct ligand evidence 0 58 total records

Functional annotation 0 EC 0 GO

Target summary

Target candidate with partial support; inspect missing evidence before prioritizing.

Automated synthesis of the evidence currently loaded. Review the underlying records before prioritizing this protein.

Main supporting evidence

No similar human protein detected The current BLAST sequence screen did not find a significant human match, lowering apparent off-target risk. Structure available ColabFold model Ligand evidence via structure/bioactivity 8 structural and 0 bioactivity records.

Risks to review

No major risk signal surfaced in the loaded evidence.

Evidence gaps

No metabolic context No SBML/network-derived reaction evidence is loaded for this protein. No FPocket pocket score No selected computational pocket-druggability value is available.

Terms and data sources used on this page

PDB: experimentally determined structures from the Protein Data Bank. These are the strongest structural evidence, but may cover only part of the protein.

AlphaFold DB model: a precomputed predicted structure downloaded from AlphaFold Database/UniProt, not an experiment performed here.

ColabFold model: a predicted structure generated for this workspace; interpret it with coverage and confidence.

pLDDT: confidence score for predicted structures. High values support local geometry; low values mean the region should not drive pocket interpretation.

FPocket / P2Rank: software tools that predict possible ligand-binding pockets on a 3D structure. They are useful screening signals, not experimental validation.

Druggability: a pocket-based estimate of whether a small molecule could bind productively. It does not mean a drug already exists.

PDB ligand: a compound observed in an experimental structure. Direct same-protein records are stronger than homolog-transferred records.

ChEMBL: a public database of measured compound bioactivity. Direct entries are stronger than entries transferred from similar proteins.

ZINC: a purchasable-compound database. Here it marks proposed candidates from chemical similarity, not measured binders.

LigQ / LigQ_2: an internal Target pipeline step that gathers PDB, ChEMBL, and ZINC ligand evidence for each protein.

Off-target: sequence similarity to proteins we prefer not to hit, such as human proteins or beneficial gut microbiome proteins.

DEG: Database of Essential Genes. A match suggests the protein resembles genes known to be essential in other organisms.

Roary / CoreCruncher: pan-genome tools used to decide whether a gene is core across analyzed strains or accessory/strain-specific.

EC / GO: functional annotations: EC describes enzyme reactions; GO describes biological process, molecular function, or cellular component.

KEGG pathway: a curated metabolic route label used here to group reactions imported from the metabolic model.

Chokepoint: a metabolic reaction that is the only producer or consumer of a metabolite in the imported model.

Prioritization evidence

Selectivity, essentiality, structural confidence, conservation, and predicted binding-site evidence.

Off-target risk

Human off-target: No hit
Gut microbiome off-target: Hit

Essentiality

Essential (DEG): N

Localization

Localization: OuterMembrane

Binding-site evidence

The selected pocket score is the FPocket value used for ranking after applying the curated structure priority. It estimates small-molecule pocket quality; it is not experimental binding evidence. The 3D viewer may show a different loaded structure, so visible pockets can differ.

FPocket Low

Structure –

Pocket –

Sequence

Primary amino-acid sequence viewer.

MTRFKYSLLFAALLPVYAQADVSVSDDPKPQESTELPTITVTADRTASSNDGYTVSGTHTPFGLPMTLREIPQSVSVITSQQMRDQNIKTLDRALLQATGTSRQIYGSDRAGYNYLFARGSRIANYQINGIPVADALADTGNANTAAYERVEVVRGVAGLPDGTGEPSATVNLVRKHPTRKPLFEVRAEAGNRKHFGLGADVSGSLNAEGTLRGRLVSTFGRGDSWRQLERSRDAELYGILEYDIAPQTRVHAGMDYQQAKETADAPLSYAVYDSQGYATAFGPKDNPATNWSNSRNRALNLFAGIEHRFNQDWKLKAEYDYTRSRFRQPYGVAGVLSIDHSTAATDLIPGYWHADPRTHSASMSLTGKYRLFGREHDLIAGINGYKYASNKYGERSIIPNAIPNAYEFSRTGAYPQPSSFAQTIPQYDTRRQIGGYLATRFRAADNLSLILGGRYSRYRAGSYNSRTQGMTYVSANRFTPYTGIVFDLTGNLSLYGSYSSLFVPQLQKDEHGSYLKPVTGNNLEADIKGEWLEGRLNASAAVYRARKNNLATAAGRDQSGNTYYRAANQAKTHGWEIEVGGRITPEWQIQAGYSQSKPRDQDGSRLNPDSVPERSFKLFTAYHFAPEAPSGRTIGAGVRRQGETHTDPAALRIPNPAAKARAADNSRQKAYAVADIMARYRFNPRTELSLNVDNLFNKHYRTQPDRHSHGALRTVNAAFTYRFK

Functional annotations

Enzyme classification and Gene Ontology terms linked to this protein.

No GO or EC annotations are currently loaded for this protein.

Sequence domains and features

Domain and signature matches imported from InterPro and related databases.

22 records

Show feature table

Start	End	DB	Term	Name
15	18	Phobius	SIGNAL_PEPTIDE_C_REGION	C-terminal region of a signal peptide.
181	724	Gene3D	G3DSA:2.40.170.20	-
181	724	InterPro	IPR036942	TonB-dependent receptor-like, beta-barrel domain superfamily
70	724	NCBIfam	TIGR01783	TonB-dependent siderophore receptor
70	724	InterPro	IPR010105	TonB-dependent siderophore receptor
7	14	Phobius	SIGNAL_PEPTIDE_H_REGION	Hydrophobic region of a signal peptide.
1	18	Phobius	SIGNAL_PEPTIDE	Signal peptide region
255	705	Pfam	PF00593	TonB dependent receptor
255	705	InterPro	IPR000531	TonB-dependent receptor-like, beta-barrel
1	20	SignalP_EUK	SignalP-noTM	SignalP-noTM
589	611	MobiDBLite	mobidb-lite	consensus disorder prediction
1	6	Phobius	SIGNAL_PEPTIDE_N_REGION	N-terminal region of a signal peptide.
1	20	SignalP_GRAM_POSITIVE	SignalP-TM	SignalP-TM
30	180	Gene3D	G3DSA:2.170.130.10	-
30	180	InterPro	IPR037066	TonB-dependent receptor, plug domain superfamily
74	724	CDD	cd01347	ligand_gated_channel
19	725	Phobius	NON_CYTOPLASMIC_DOMAIN	Region of a membrane-bound protein predicted to be outside the membrane, in the extracellular region.
68	165	Pfam	PF07715	TonB-dependent Receptor Plug Domain
68	165	InterPro	IPR012910	TonB-dependent receptor, plug domain
25	724	PANTHER	PTHR32552	FERRICHROME IRON RECEPTOR-RELATED
25	724	InterPro	IPR039426	TonB-dependent receptor-like
31	724	SUPERFAMILY	SSF56935	Porins

3D structure

Selected loaded structure. Experimental PDB entries may cover only a portion of the sequence; AlphaFold DB and ColabFold models typically cover the full protein but remain computational predictions.

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Pocket score High Medium Low

How colors and pocket overlays are used

Uniform protein color marks the displayed model as a single molecular object.

Experimental PDB structures may be colored by chain to distinguish subunits or copies present in the file.

Pocket colors and alpha spheres are evidence overlays for predicted binding cavities; they are not alternative protein chains.

'Alpha spheres' is FPocket's own cavity-shape geometry, imported when available and aligned with the loaded structure.

'Pocket atoms'/'Predicted site atoms' show the pocket's residue atoms instead: P2Rank reports residues rather than alpha spheres, and FPocket falls back to this when alpha-sphere geometry is unavailable or doesn't align.

'No pocket geometry' means neither alpha spheres nor residue-position data could be found for that pocket; the layer just highlights the same residues as 'Nearby residues'.

Pocket details Inspect a specific pocket, or open the full viewer

Binding pockets · FPocket

Druggability: high ≥ 0.7 · medium 0.4–0.69 · low < 0.4

Site 1 FPocket #2

0.232

Show in viewer

Surrounding area

All structural evidence 0 experimental · 1 predicted

Structural evidence

0 + 1

Experimental PDB entries plus predicted AlphaFold DB or ColabFold models. Click Switch to display a different loaded structure in the viewer.

Entry	Method	Resolution	Chain	Coverage	Links	Status
ColabFold HT085_RS00105	ColabFold	—	—	full sequence	—	Viewing

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

Chemistry signal

Structural ligand evidence is available for this target.

Direct evidence 0 same-protein records

Transferred evidence 8 records from similar proteins

Structural ligands 8 0 loaded crystals

Measured bioactivity 0 direct and transferred ChEMBL records

Proposed compounds 50 similarity-based ZINC candidates

Best available ligand signal

6L0 PDB via homolog 598.7 Da · LogP 0.63 · TPSA 208.9 Open detail RCSB PDB

C8E PDB via homolog Detail RCSB PDB

DPO PDB via homolog Detail RCSB PDB

EFE PDB via homolog Detail RCSB PDB

FTT PDB via homolog Detail RCSB PDB

Highest-confidence structural evidence: ligands co-crystallized with this exact protein. If the source PDB is loaded in Target, 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
6L0 RCSB PDB	6Z8A	Q9I116	598.7 Da LogP 0.63 TPSA 208.9	2 viol.	✓ Clean	`C1CCNC(=O)CCC(=O)N(CCCCCNC(=O)CCC(=O)N(C/C=C/CC…`
C8E RCSB PDB	6I98	Q9I116	306.4 Da LogP 2.41 TPSA 57.2	✓ Ro5	✓ Clean	`CCCCCCCCOCCOCCOCCOCCO`
DPO RCSB PDB	1QJQ	P06971	173.9 Da LogP -3.34 TPSA 135.6	✓ Ro5	✓ Clean	`[O-]P(=O)([O-])OP(=O)([O-])[O-]`
EFE RCSB PDB	3QLB	C5I2D9	378.3 Da LogP 1.23 TPSA 38.5	✓ Ro5	✓ Clean	`C[N@+]12[C@@H]3CS[C@H]1[C@@H]4CSC5=[N+]4[Fe@]2(…`
FTT RCSB PDB	1QJQ	P06971	244.4 Da LogP 3.74 TPSA 57.5	✓ Ro5	✓ Clean	`CCCCCCCCCCC[C@H](CC(=O)O)O`
LDA RCSB PDB	1XKW	P42512	229.4 Da LogP 4.48 TPSA 23.1	✓ Ro5	✓ Clean	`CCCCCCCCCCCC[N+](C)(C)[O-]`
N8E RCSB PDB	2W16	P48632	350.5 Da LogP 2.42 TPSA 66.4	✓ Ro5	✓ Clean	`CCCCCCCCOCCOCCOCCOCCOCCO`
OES RCSB PDB	1BY3	P06971	206.4 Da LogP 2.09 TPSA 37.3	✓ Ro5	✓ Clean	`CCCCCCCC[S@@](=O)CCO`

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 ZINC	1.000	494.7 Da LogP 4.02 TPSA 84.8	✓ Ro5	✓ Clean	`CCCCCCCCCCCCOCCOCCOCCOCCOCCOCCOCCO`
ZINC100070166 ZINC	1.000	290.4 Da LogP 3.17 TPSA 47.9	✓ Ro5	✓ Clean	`CCCCCCCCCCOCCOCCOCCO`
ZINC100305273 ZINC	1.000	286.5 Da LogP 4.91 TPSA 57.5	✓ Ro5	✓ Clean	`CCCCCCCCCCCCCC[C@H](O)CC(=O)O`
ZINC100305277 ZINC	1.000	286.5 Da LogP 4.91 TPSA 57.5	✓ Ro5	✓ Clean	`CCCCCCCCCCCCCC[C@@H](O)CC(=O)O`
ZINC100310628 ZINC	1.000	478.7 Da LogP 4.78 TPSA 75.6	✓ Ro5	✓ Clean	`CCCCCCCCCCCCCCOCCOCCOCCOCCOCCOCCO`
ZINC100365196 ZINC	1.000	302.5 Da LogP 4.71 TPSA 38.7	✓ Ro5	✓ Clean	`CCCCCCCCCCCCCCOCCOCCO`
ZINC100500540 ZINC	1.000	230.3 Da LogP 3.35 TPSA 57.5	✓ Ro5	✓ Clean	`CCCCCCCCCC[C@@H](O)CC(=O)O`
ZINC100500548 ZINC	1.000	258.4 Da LogP 4.13 TPSA 57.5	✓ Ro5	✓ Clean	`CCCCCCCCCCCC[C@H](O)CC(=O)O`
ZINC100500553 ZINC	1.000	258.4 Da LogP 4.13 TPSA 57.5	✓ Ro5	✓ Clean	`CCCCCCCCCCCC[C@@H](O)CC(=O)O`
ZINC101772322 ZINC	1.000	434.7 Da LogP 4.76 TPSA 66.4	✓ Ro5	✓ Clean	`CCCCCCCCCCCCCCOCCOCCOCCOCCOCCO`
ZINC103600921 ZINC	1.000	466.7 Da LogP 3.24 TPSA 84.8	✓ Ro5	✓ Clean	`CCCCCCCCCCOCCOCCOCCOCCOCCOCCOCCO`
ZINC14880431 ZINC	1.000	378.6 Da LogP 3.20 TPSA 66.4	✓ Ro5	✓ Clean	`CCCCCCCCCCOCCOCCOCCOCCOCCO`
ZINC14881140 ZINC	1.000	306.4 Da LogP 2.41 TPSA 57.2	✓ Ro5	✓ Clean	`CCCCCCCCOCCOCCOCCOCCO`
ZINC16051619 ZINC	1.000	350.5 Da LogP 2.42 TPSA 66.4	✓ Ro5	✓ Clean	`CCCCCCCCOCCOCCOCCOCCOCCO`
ZINC16051927 ZINC	1.000	216.3 Da LogP 2.96 TPSA 57.5	✓ Ro5	✓ Clean	`CCCCCCCCC[C@@H](O)CC(=O)O`
ZINC1849937 ZINC	1.000	201.4 Da LogP 3.70 TPSA 23.1	✓ Ro5	✓ Clean	`CCCCCCCCCC[N+](C)(C)[O-]`
ZINC2008702 ZINC	1.000	243.4 Da LogP 4.87 TPSA 23.1	✓ Ro5	✓ Clean	`CCCCCCCCCCCCC[N+](C)(C)[O-]`
ZINC2039068 ZINC	1.000	244.4 Da LogP 3.74 TPSA 57.5	✓ Ro5	✓ Clean	`CCCCCCCCCCC[C@H](O)CC(=O)O`
ZINC2039069 ZINC	1.000	244.4 Da LogP 3.74 TPSA 57.5	✓ Ro5	✓ Clean	`CCCCCCCCCCC[C@@H](O)CC(=O)O`
ZINC2039372 ZINC	1.000	229.4 Da LogP 4.48 TPSA 23.1	✓ Ro5	✓ Clean	`CCCCCCCCCCCC[N+](C)(C)[O-]`
ZINC2504625 ZINC	1.000	216.3 Da LogP 2.96 TPSA 57.5	✓ Ro5	✓ Clean	`CCCCCCCCC[C@H](O)CC(=O)O`
ZINC2516963 ZINC	1.000	215.4 Da LogP 4.09 TPSA 23.1	✓ Ro5	✓ Clean	`CCCCCCCCCCC[N+](C)(C)[O-]`
ZINC2558055 ZINC	1.000	202.3 Da LogP 2.57 TPSA 57.5	✓ Ro5	✓ Clean	`CCCCCCCC[C@H](O)CC(=O)O`
ZINC2558056 ZINC	1.000	230.3 Da LogP 3.35 TPSA 57.5	✓ Ro5	✓ Clean	`CCCCCCCCCC[C@H](O)CC(=O)O`
ZINC2584424 ZINC	1.000	218.3 Da LogP 2.37 TPSA 38.7	✓ Ro5	✓ Clean	`CCCCCCCCOCCOCCO`
ZINC32838984 ZINC	1.000	272.4 Da LogP 4.52 TPSA 57.5	✓ Ro5	✓ Clean	`CCCCCCCCCCCCC[C@@H](O)CC(=O)O`
ZINC32838986 ZINC	1.000	272.4 Da LogP 4.52 TPSA 57.5	✓ Ro5	✓ Clean	`CCCCCCCCCCCCC[C@H](O)CC(=O)O`
ZINC4521877 ZINC	1.000	234.3 Da LogP 1.61 TPSA 47.9	✓ Ro5	✓ Clean	`CCCCCCOCCOCCOCCO`
ZINC5273610 ZINC	1.000	322.4 Da LogP 1.64 TPSA 66.4	✓ Ro5	✓ Clean	`CCCCCCOCCOCCOCCOCCOCCO`
ZINC58538366 ZINC	1.000	392.6 Da LogP 3.59 TPSA 66.4	✓ Ro5	✓ Clean	`CCCCCCCCCCCOCCOCCOCCOCCOCCO`
ZINC58631420 ZINC	1.000	422.6 Da LogP 3.22 TPSA 75.6	✓ Ro5	✓ Clean	`CCCCCCCCCCOCCOCCOCCOCCOCCOCCO`
ZINC59441819 ZINC	1.000	318.5 Da LogP 3.95 TPSA 47.9	✓ Ro5	✓ Clean	`CCCCCCCCCCCCOCCOCCOCCO`
ZINC59622400 ZINC	1.000	274.4 Da LogP 3.93 TPSA 38.7	✓ Ro5	✓ Clean	`CCCCCCCCCCCCOCCOCCO`
ZINC71788551 ZINC	1.000	334.5 Da LogP 3.19 TPSA 57.2	✓ Ro5	✓ Clean	`CCCCCCCCCCOCCOCCOCCOCCO`
ZINC71788564 ZINC	1.000	262.4 Da LogP 2.39 TPSA 47.9	✓ Ro5	✓ Clean	`CCCCCCCCOCCOCCOCCO`
ZINC71788567 ZINC	1.000	406.6 Da LogP 3.98 TPSA 66.4	✓ Ro5	✓ Clean	`CCCCCCCCCCCCOCCOCCOCCOCCOCCO`
ZINC8214594 ZINC	1.000	362.6 Da LogP 3.97 TPSA 57.2	✓ Ro5	✓ Clean	`CCCCCCCCCCCCOCCOCCOCCOCCO`
ZINC85915165 ZINC	1.000	202.3 Da LogP 2.57 TPSA 57.5	✓ Ro5	✓ Clean	`CCCCCCCC[C@@H](O)CC(=O)O`
ZINC88260008 ZINC	1.000	390.6 Da LogP 4.75 TPSA 57.2	✓ Ro5	✓ Clean	`CCCCCCCCCCCCCCOCCOCCOCCOCCO`
ZINC95784968 ZINC	1.000	450.7 Da LogP 4.00 TPSA 75.6	✓ Ro5	✓ Clean	`CCCCCCCCCCCCOCCOCCOCCOCCOCCOCCO`
ZINC95863931 ZINC	1.000	464.7 Da LogP 4.39 TPSA 75.6	✓ Ro5	✓ Clean	`CCCCCCCCCCCCCOCCOCCOCCOCCOCCOCCO`
ZINC1849711 ZINC	0.950	202.3 Da LogP 3.14 TPSA 29.5	✓ Ro5	✓ Clean	`CCCCCCCCCCOCCO`
ZINC1850542 ZINC	0.950	216.4 Da LogP 3.53 TPSA 29.5	✓ Ro5	✓ Clean	`CCCCCCCCCCCOCCO`
ZINC2555269 ZINC	0.950	220.3 Da LogP 1.22 TPSA 47.9	✓ Ro5	✓ Clean	`CCCCCOCCOCCOCCO`
ZINC59660505 ZINC	0.950	244.4 Da LogP 4.31 TPSA 29.5	✓ Ro5	✓ Clean	`CCCCCCCCCCCCCOCCO`
ZINC8437287 ZINC	0.950	230.4 Da LogP 3.92 TPSA 29.5	✓ Ro5	✓ Clean	`CCCCCCCCCCCCOCCO`
ZINC85733754 ZINC	0.950	258.4 Da LogP 4.70 TPSA 29.5	✓ Ro5	✓ Clean	`CCCCCCCCCCCCCCOCCO`
ZINC1644613 ZINC	0.810	206.3 Da LogP 0.83 TPSA 47.9	✓ Ro5	✓ Clean	`CCCCOCCOCCOCCO`
ZINC31159540 ZINC	0.778	204.3 Da LogP 1.15 TPSA 77.8	✓ Ro5	✓ Clean	`CCCCC[C@@H](O)C[C@@H](O)CC(=O)O`
ZINC31159544 ZINC	0.778	204.3 Da LogP 1.15 TPSA 77.8	✓ Ro5	✓ Clean	`CCCCC[C@H](O)C[C@@H](O)CC(=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.