KpATCC43816 Protein target profile

peptide chain release factor 3

Accession: VK055_2600

Gene: prfC AIK81197.1 3D evidence: AlphaFold DB model + ColabFold model Metabolism Not in network UniProt A0A0H3GMW6
Length 529
Pocket druggability (P2Rank · AlphaFold DB model) 0.712
Direct ligand evidence 0 56 total records
Functional annotation 0 EC 9 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.

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 (%)
42.857 Lower values reduce human off-target concern.
Human E-value
6.08e-07
Gut microbiome similarity
17.7% of screened genomes Lower prevalence suggests narrower overlap with the screened gut microbiome.

Essentiality

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

Structure confidence

ColabFold pLDDT
88.65 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) 0.712
Structure A0A0H3GMW6
Pocket Pocket 1
Druggability (FPocket) 0.289
Structure A0A0H3GMW6
Pocket Pocket 1
ColabFold model
P2Rank 0.655 · Pocket 1
FPocket 0.72 · Pocket 2
Core conservation Conserved core gene
Roary core
CoreCruncher core
Gut microbiome 840 / 4744 genomes with a hit
Prevalence 17.7%

Metabolic context

Reactions catalyzed, pathway membership, and centrality in the genome-scale metabolic network.

This protein is not associated with the imported metabolic network for this genome.

Browse the genome's metabolic network

Imported from KpATCC43816.sbml · 2026-07-09

Sequence

Primary amino-acid sequence viewer.

MTLSPYLQEVAKRRTFAIISHPDAGKTTITEKVLLFGQAIQTAGTVKGRGSSQHAKSDWMEMEKQRGISITTSVMQFPYHDCLVNLLDTPGHEDFSEDTYRTLTAVDCCLMVIDAAKGVEDRTRKLMEVTRLRDTPILTFMNKLDRDIRDPMELLDEVENELKIGCAPITWPIGCGKLFKGVYHLYKDETYLYQTGKGHTIQEVRIVKGLNNPDLDAAVGEDLAQQLRDELELVQGASNEFDKDLFLAGEITPVFFGTALGNFGVDHMLDGLVEWAPAPMPRNTDTREVTATEEKFTGFVFKIQANMDPKHRDRVAFMRVVSGKYEKGMKLRQVRIGKDVVISDALTFMAGDRSHVEEAYPGDIIGLHNHGTIQIGDTFTQGEMMKFTGIPNFAPELFRRIRLKDPLKQKQLLKGLVQLSEEGAVQVFRPIANNDLIVGAVGVLQFDVVVARLKSEYNVEAIYESVNVATARWVESTDVKKFEEFKRKNEVQLALDGGDNLTYIAPTMVNLNLTQERYPDVVFRKTREH

Functional annotations

Enzyme classification and Gene Ontology terms linked to this protein.

9 GO

Subcellular localization

Localization
Cytoplasmic

Gene Ontology (GO)

9
  • GO:0005525 Binding to GTP, guanosine triphosphate.
  • GO:0006415 The process resulting in the release of a polypeptide chain from the ribosome, usually in response to a termination codon (UAA, UAG, or UGA in the universal genetic code).
  • GO:0005737 The contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures.
  • GO:0003924 Catalysis of the reaction: GTP + H2O = GDP + H+ + phosphate.
  • GO:0005829 The part of the cytoplasm that does not contain organelles but which does contain other particulate matter, such as protein complexes.
  • GO:0097216 Binding to guanosine tetraphosphate (5'-ppGpp-3'), a guanosine bisphosphate having diphosphate groups at both the 3' and 5'-positions.
  • GO:0016150 A translation release factor that is not specific to particular codons; binds to guanine nucleotides.
  • GO:0016149 A translation release factor that is specific for one or more particular termination codons; acts at the ribosomal A-site and require polypeptidyl-tRNA at the P-site.
  • GO:0006449 Any process that modulates the frequency, rate or extent of translational termination.

Sequence domains and features

Domain and signature matches imported from InterPro and related databases.

50 records
Show feature table
Start End DB Term Name
12 279 CDD cd04169 RF3
12 279 InterPro IPR041732 Peptide chain release factor 3, GTP-binding domain
280 390 FunFam G3DSA:2.40.30.10:FF:000040 Peptide chain release factor 3
395 464 CDD cd16259 RF3_III
7 528 PANTHER PTHR43556 PEPTIDE CHAIN RELEASE FACTOR RF3
7 528 InterPro IPR004548 Peptide chain release factor 3
10 277 SUPERFAMILY SSF52540 P-loop containing nucleoside triphosphate hydrolases
10 277 InterPro IPR027417 P-loop containing nucleoside triphosphate hydrolase
18 77 Gene3D G3DSA:3.40.50.300 -
18 77 InterPro IPR027417 P-loop containing nucleoside triphosphate hydrolase
110 275 Gene3D G3DSA:3.40.50.300 -
110 275 InterPro IPR027417 P-loop containing nucleoside triphosphate hydrolase
3 529 NCBIfam TIGR00503 peptide chain release factor 3
3 529 InterPro IPR004548 Peptide chain release factor 3
15 156 NCBIfam TIGR00231 small GTP-binding protein domain
15 156 InterPro IPR005225 Small GTP-binding protein domain
262 393 SUPERFAMILY SSF50447 Translation proteins
262 393 InterPro IPR009000 Translation protein, beta-barrel domain superfamily
78 378 Gene3D G3DSA:3.40.50.300 -
78 378 InterPro IPR027417 P-loop containing nucleoside triphosphate hydrolase
393 468 SUPERFAMILY SSF54980 EF-G C-terminal domain-like
393 468 InterPro IPR035647 EF-G domain III/V-like
18 77 FunFam G3DSA:3.40.50.300:FF:000253 Peptide chain release factor 3
110 275 FunFam G3DSA:3.40.50.300:FF:000184 Peptide chain release factor 3
58 73 ProSitePatterns PS00301 Translational (tr)-type guanine nucleotide-binding (G) domain signature.
58 73 InterPro IPR031157 Tr-type G domain, conserved site
390 529 Gene3D G3DSA:3.30.70.3280 Peptide chain release factor 3, domain III
390 529 InterPro IPR038467 Peptide chain release factor 3, domain III superfamily
296 382 CDD cd03689 RF3_II
4 527 Hamap MF_00072 Peptide chain release factor 3 [prfC].
4 527 InterPro IPR004548 Peptide chain release factor 3
387 514 Pfam PF16658 Class II release factor RF3, C-terminal domain
387 514 InterPro IPR032090 Peptide chain release factor 3, C-terminal
390 529 FunFam G3DSA:3.30.70.3280:FF:000001 Peptide chain release factor 3
101 112 PRINTS PR00315 GTP-binding elongation factor signature
101 112 InterPro IPR000795 Translational (tr)-type GTP-binding domain
15 28 PRINTS PR00315 GTP-binding elongation factor signature
15 28 InterPro IPR000795 Translational (tr)-type GTP-binding domain
137 146 PRINTS PR00315 GTP-binding elongation factor signature
137 146 InterPro IPR000795 Translational (tr)-type GTP-binding domain
85 95 PRINTS PR00315 GTP-binding elongation factor signature
85 95 InterPro IPR000795 Translational (tr)-type GTP-binding domain
65 73 PRINTS PR00315 GTP-binding elongation factor signature
65 73 InterPro IPR000795 Translational (tr)-type GTP-binding domain
314 380 Pfam PF03144 Elongation factor Tu domain 2
314 380 InterPro IPR004161 Translation elongation factor EFTu-like, domain 2
13 277 Pfam PF00009 Elongation factor Tu GTP binding domain
13 277 InterPro IPR000795 Translational (tr)-type GTP-binding domain
11 280 ProSiteProfiles PS51722 Translational (tr)-type guanine nucleotide-binding (G) domain profile.
11 280 InterPro IPR000795 Translational (tr)-type GTP-binding domain

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
0.712
Likely same site as FPocket 1 0.4 Å 15 shared residues 100% of smaller site
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Surrounding area
Pocket 2 P2Rank #2
0.384
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Surrounding area
Pocket 3 P2Rank #3
0.138
Likely same site as FPocket 7 0.6 Å 11 shared residues 100% of smaller site
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Surrounding area
Pocket 4 P2Rank #4
0.111
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Surrounding area
Pocket 5 P2Rank #5
0.069
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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 #1
0.289
Likely same site as P2Rank 1 0.4 Å 15 shared residues 100% of smaller site
Show in viewer
Surrounding area
Pocket 2 FPocket #7
0.2
Likely same site as P2Rank 3 0.6 Å 11 shared residues 100% of smaller site
Show in viewer
Surrounding area
Residue sets
UniProt: Binding site:142-145
UniProt: Binding site:20-27
UniProt: Binding site:88-92
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_A0A0H3GMW6
AlphaFold DB full sequence Viewing
ColabFold VK055_2600
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.

56 records
Chemistry signal

Structural ligand evidence is available for this target.

Direct evidence 0 same-protein records
Transferred evidence 6 records from similar proteins
Structural ligands 6 0 loaded crystals
Measured bioactivity 0 direct and transferred ChEMBL records
Proposed compounds 50 similarity-based ZINC candidates
Best available ligand signal
5GP PDB via homolog 363.2 Da · LogP -2.57 · TPSA 206.0 Open detail RCSB PDB
FUA PDB via homolog Detail RCSB PDB
G4P PDB via homolog Detail RCSB PDB
GCP PDB via homolog Detail RCSB PDB
GNP PDB via homolog Detail RCSB PDB

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
5GP RCSB PDB Q96RP9 363.2 Da LogP -2.57 TPSA 206.0 1 viol. ✓ Clean c1nc2c(n1[C@H]3[C@@H]([C@@H]([C@H](O3)COP(=O)(O…
FUA RCSB PDB Q5SHN5 516.7 Da LogP 5.67 TPSA 104.1 2 viol. ✓ Clean C[C@H]1[C@@H]2CC[C@]3([C@H]([C@]2(CC[C@H]1O)C)[…
G4P RCSB PDB B8DIL5 603.2 Da LogP -2.22 TPSA 345.6 3 viol. ✓ Clean c1nc2c(n1[C@H]3[C@@H]([C@@H]([C@H](O3)CO[P@](=O…
GCP RCSB PDB B1XFI4 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 P0A7I4 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…
SPM RCSB PDB Q96RP9 202.3 Da LogP -0.36 TPSA 76.1 ✓ Ro5 ✓ Clean C(CCNCCCN)CNCCCN

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.