KpKP13 Protein target profile

Signal recognition particle protein

Accession: KP13_02426

Gene: ffh AHE43138.1 3D evidence: AlphaFold DB model + ColabFold model UniProt A0A0H3GX08
Length 454
Pocket druggability (P2Rank · AlphaFold DB model) 0.484
Direct ligand evidence 0 54 total records
Functional annotation 1 EC 6 GO
Target summary

Promising target candidate with multiple supporting evidence streams.

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

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
Hit
Human identity (%)
34.393 Lower values reduce human off-target concern.
Human E-value
1.41e-54
Gut microbiome similarity
48.9% of screened genomes Lower prevalence suggests narrower overlap with the screened gut microbiome.

Essentiality

Essential (DEG)
Y
DEG identity (%)
96.916 Higher values support similarity to known essential genes.
DEG E-value
0.0 Smaller values mean stronger essential-gene similarity.

Structure confidence

ColabFold pLDDT
82.82 0-100 confidence; >70 supports local structural interpretation.

Binding-site evidence

AlphaFold DB / UniProt model

P2Rank's binding-site probability is the primary druggability signal shown across the app; FPocket's druggability score is shown alongside it for comparison. Both estimate small-molecule pocket quality after applying the curated structure priority — neither is experimental binding evidence. The 3D viewer may show a different loaded structure, so visible pockets can differ.

Druggability (P2Rank) 0.484
Structure A0A0H3GX08
Pocket Pocket 1
Druggability (FPocket) 0.728
Structure A0A0H3GX08
Pocket Pocket 4
ColabFold model
P2Rank 0.491 · Pocket 1
FPocket 0.593 · Pocket 3
Core conservation Conserved core gene
Roary core
CoreCruncher core
Gut microbiome 2318 / 4744 genomes with a hit
Prevalence 48.9%

Sequence

Primary amino-acid sequence viewer.

MFDNLTDRLSRTLRNISGRGRLTEDNIKDTLREVRMALLEADVALPVVRDFISRVKESAVGHEVNKSLTPGQEFVKIVRNELVAAMGEENQTLDLAAQPPAVVLMAGLQGAGKTTSVGKLGKFLREKHKKKVLVVSADVYRPAAIKQLETLAEQVGVDFFPSDVGQKPVDIVNAALKEAKLKFYDVLLVDTAGRLHVDEAMMDEIKHVHAAINPVETLFVVDAMTGQDAANTAKAFNEALPLTGVVLTKVDGDARGGAALSIRHITGKPIKFLGVGEKTEALEPFHPDRVASRILGMGDVLSLIEDIESKVDRAQAEKLASKLKKGDGFDLTDFLEQLRQMKNMGGMASLMGKLPGMGQIPDNVKAQMDDKVLVRMEAIINSMTLKERAKPEIIKGSRKRRIAAGCGMQVQDVNRLLKQFDDMQRMMKKMKSKGGMMKMMRGMKGMMPPGFPGR

Functional annotations

Enzyme classification and Gene Ontology terms linked to this protein.

1 EC 6 GO

Subcellular localization

Localization
Unknown

Enzyme Commission (EC)

1

Gene Ontology (GO)

6
  • GO:0016887 Catalysis of the reaction: ATP + H2O = ADP + H+ phosphate. ATP hydrolysis is used in some reactions as an energy source, for example to catalyze a reaction or drive transport against a concentration gradient.
  • GO:0003924 Catalysis of the reaction: GTP + H2O = GDP + H+ + phosphate.
  • GO:0048500 A complex of protein and RNA which facilitates translocation of proteins across membranes.
  • GO:0006614 The targeting of proteins to a membrane that occurs during translation and is dependent upon two key components, the signal-recognition particle (SRP) and the SRP receptor. SRP is a cytosolic particle that transiently binds to the endoplasmic reticulum (ER) signal sequence in a nascent protein, to the large ribosomal unit, and to the SRP receptor in the ER membrane.
  • GO:0005525 Binding to GTP, guanosine triphosphate.
  • GO:0008312 Binding to a 7S RNA, the RNA component of the signal recognition particle (SRP).

Sequence domains and features

Domain and signature matches imported from InterPro and related databases.

35 records
Show feature table
Start End DB Term Name
2 429 NCBIfam TIGR00959 signal recognition particle protein
2 429 InterPro IPR004780 Signal recognition particle protein
42 354 SUPERFAMILY SSF52540 P-loop containing nucleoside triphosphate hydrolases
42 354 InterPro IPR027417 P-loop containing nucleoside triphosphate hydrolase
101 294 CDD cd18539 SRP_G
1 443 PANTHER PTHR11564 SIGNAL RECOGNITION PARTICLE 54K PROTEIN SRP54
1 443 InterPro IPR022941 Signal recognition particle, SRP54 subunit
1 86 SMART SM00963 SRP54_N_2
1 86 InterPro IPR013822 Signal recognition particle SRP54, helical bundle
269 282 ProSitePatterns PS00300 SRP54-type proteins GTP-binding domain signature.
269 282 InterPro IPR000897 Signal recognition particle, SRP54 subunit, GTPase domain
329 431 SUPERFAMILY SSF47446 Signal peptide-binding domain
329 431 InterPro IPR036891 Signal recognition particle, SRP54 subunit, M-domain superfamily
100 296 SMART SM00962 SRP54_3
100 296 InterPro IPR000897 Signal recognition particle, SRP54 subunit, GTPase domain
4 96 FunFam G3DSA:1.20.120.140:FF:000001 Signal recognition particle GTPase
99 247 SMART SM00382 AAA_5
99 247 InterPro IPR003593 AAA+ ATPase domain
304 324 Coils Coil Coil
329 427 Pfam PF02978 Signal peptide binding domain
329 427 InterPro IPR004125 Signal recognition particle, SRP54 subunit, M-domain
5 82 Pfam PF02881 SRP54-type protein, helical bundle domain
5 82 InterPro IPR013822 Signal recognition particle SRP54, helical bundle
90 285 Gene3D G3DSA:3.40.50.300 -
90 285 InterPro IPR027417 P-loop containing nucleoside triphosphate hydrolase
328 452 Gene3D G3DSA:1.10.260.30 -
328 452 InterPro IPR036891 Signal recognition particle, SRP54 subunit, M-domain superfamily
100 296 Pfam PF00448 SRP54-type protein, GTPase domain
3 305 Gene3D G3DSA:1.20.120.140 -
3 305 InterPro IPR042101 Signal recognition particle SRP54, N-terminal domain superfamily
413 433 Coils Coil Coil
5 440 Hamap MF_00306 Signal recognition particle 54 kDa protein [srp54].
5 440 InterPro IPR022941 Signal recognition particle, SRP54 subunit
90 285 FunFam G3DSA:3.40.50.300:FF:000022 Signal recognition particle 54 kDa subunit
328 452 FunFam G3DSA:1.10.260.30:FF:000001 Signal recognition particle protein

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 · P2Rank

Druggability (P2Rank): high ≥ 0.5 · medium 0.2–0.49 · low < 0.2

Pocket 1 P2Rank #1
0.484
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Surrounding area
Pocket 2 P2Rank #2
0.35
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Surrounding area
Pocket 3 P2Rank #3
0.297
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Surrounding area
Pocket 4 P2Rank #4
0.125
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Surrounding area
Pocket 5 P2Rank #5
0.026
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Surrounding area

Binding pockets · FPocket

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

Pocket 1 FPocket #4
0.728
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Surrounding area
Pocket 2 FPocket #38
0.572 Unusual size
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Surrounding area
Pocket 3 FPocket #13
0.205
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Surrounding area
Residue sets
UniProt: Binding site:107-114
UniProt: Binding site:190-194
UniProt: Binding site:248-251
All structural evidence 0 experimental · 2 predicted

Structural evidence

0 + 2

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
AlphaFold DB AF_A0A0H3GX08
AlphaFold DB full sequence Viewing
ColabFold KP13_02426
ColabFold full sequence Loaded

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.

54 records
Chemistry signal

Structural ligand evidence is available for this target.

Direct evidence 0 same-protein records
Transferred evidence 4 records from similar proteins
Structural ligands 4 0 loaded crystals
Measured bioactivity 0 direct and transferred ChEMBL records
Proposed compounds 50 similarity-based ZINC candidates
Best available ligand signal
ALF PDB via homolog 103.0 Da · LogP 1.30 · TPSA 0.0 Open detail RCSB PDB
GCP PDB via homolog Detail RCSB PDB
GNP PDB via homolog Detail RCSB PDB
OXY PDB via homolog Detail RCSB PDB
ZINC104869865 ZINC proposed compound · Tanimoto 0.850 Detail ZINC

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.

Show only:
Ligand Source crystal UniProt (homolog) MW · LogP · TPSA Lipinski PAINS SMILES
ALF RCSB PDB P0AGD7 103.0 Da LogP 1.30 TPSA 0.0 ✓ Ro5 ✓ Clean F[Al-](F)(F)F
GCP RCSB PDB P0AGD7 521.2 Da LogP -2.22 TPSA 289.9 3 viol. ✓ Clean c1nc2c(n1[C@H]3[C@@H]([C@@H]([C@H](O3)CO[P@](=O…
GNP RCSB PDB P0AGD7 522.2 Da LogP -2.76 TPSA 301.9 3 viol. ✓ Clean c1nc2c(n1[C@H]3[C@@H]([C@@H]([C@H](O3)CO[P@](=O…
OXY RCSB PDB O07347 32.0 Da LogP 0.07 TPSA 34.1 ✓ Ro5 ✓ Clean 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.

Cross-references

External database identifiers for this protein, its structures, ligands, and metabolic reactions.