KpATCC43816 Protein target profile

srmB, DEAD-box RNA helicase

Accession: VK055_4600

Gene: AIK83134.1 3D evidence: AlphaFold DB model + ColabFold model Metabolism Not in network UniProt A0A0H3GWV4
Length 443
Pocket druggability (P2Rank · AlphaFold DB model) 0.85
Direct ligand evidence 0 58 total records
Functional annotation 1 EC 6 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 (%)
56.452 Lower values reduce human off-target concern.
Human E-value
2.89e-14
Gut microbiome similarity
3.1% of screened genomes Lower prevalence suggests narrower overlap with the screened gut microbiome.

Essentiality

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

Structure confidence

ColabFold pLDDT
85.79 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) 0.85
Structure A0A0H3GWV4
Pocket Pocket 1
Druggability (FPocket) 0.181
Structure A0A0H3GWV4
Pocket Pocket 7
ColabFold model
P2Rank 0.919 · Pocket 1
FPocket 0.566 · Pocket 33
Core conservation Conserved core gene
Roary core
CoreCruncher core
Gut microbiome 146 / 4744 genomes with a hit
Prevalence 3.1%

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.

MTVTTFSELELDENLLEALQDKGFTRPTAIQAAAIPPALDGRDILGSAPTGTGKTAAYLLPALQHLLDFPRKKSGPPRILILTPTRELAMQVADHARELAKHTHLDIATITGGVAYMNHAEVFSENQDIVVATTGRLLQYIKEENFDCRAVETLILDEADRMLDMGFAQDIETIAGETRWRKQTMLFSATLEGDAIKDFAERLLEEPVEVSANPSTRERKKIHQWYYRADDIEHKTKLLVNLLQQPEATRAIVFVRKRERVHELANWLREAGINTCWLEGEMVQAKRNEAIKRLTDGRVNVLIATDVAARGIDIPDVSHVFNFDMPRTADTYLHRIGRTGRAGKKGTAISLVEAHDHLLLGKIGRYIEEPLKARVIDELRPTTHAPSEKLTGKPSKKVLAKRAQKKKDEKEKPRVKKRHRDTKNIGKRRKPSAAGTPSASSDE

Functional annotations

Enzyme classification and Gene Ontology terms linked to this protein.

1 EC 6 GO

Subcellular localization

Localization
Cytoplasmic

Enzyme Commission (EC)

1

Gene Ontology (GO)

6
  • GO:0000027 The aggregation, arrangement and bonding together of constituent RNAs and proteins to form the large ribosomal subunit.
  • GO:0005524 Binding to ATP, adenosine 5'-triphosphate, a universally important coenzyme and enzyme regulator.
  • GO:0003676 Binding to a nucleic acid.
  • GO:0003724 Unwinding of an RNA helix, driven by ATP hydrolysis.
  • GO:0005829 The part of the cytoplasm that does not contain organelles but which does contain other particulate matter, such as protein complexes.
  • 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.

Sequence domains and features

Domain and signature matches imported from InterPro and related databases.

31 records
Show feature table
Start End DB Term Name
222 352 CDD cd18787 SF2_C_DEAD
411 426 MobiDBLite mobidb-lite consensus disorder prediction
219 388 Gene3D G3DSA:3.40.50.300 -
219 388 InterPro IPR027417 P-loop containing nucleoside triphosphate hydrolase
219 388 FunFam G3DSA:3.40.50.300:FF:000555 ATP-dependent RNA helicase SrmB
382 443 MobiDBLite mobidb-lite consensus disorder prediction
28 198 Pfam PF00270 DEAD/DEAH box helicase
28 198 InterPro IPR011545 DEAD/DEAH box helicase domain
262 343 SMART SM00490 helicmild6
262 343 InterPro IPR001650 Helicase, C-terminal
1 213 FunFam G3DSA:3.40.50.300:FF:000291 ATP-dependent RNA helicase SrmB
5 412 PANTHER PTHR47959 ATP-DEPENDENT RNA HELICASE RHLE-RELATED
4 427 Hamap MF_00967 ATP-dependent RNA helicase SrmB [srmB].
4 427 InterPro IPR028621 ATP-dependent RNA helicase SrmB
235 343 Pfam PF00271 Helicase conserved C-terminal domain
235 343 InterPro IPR001650 Helicase, C-terminal
234 387 ProSiteProfiles PS51194 Superfamilies 1 and 2 helicase C-terminal domain profile.
234 387 InterPro IPR001650 Helicase, C-terminal
23 223 SMART SM00487 ultradead3
23 223 InterPro IPR014001 Helicase superfamily 1/2, ATP-binding domain
1 213 Gene3D G3DSA:3.40.50.300 -
1 213 InterPro IPR027417 P-loop containing nucleoside triphosphate hydrolase
76 358 SUPERFAMILY SSF52540 P-loop containing nucleoside triphosphate hydrolases
76 358 InterPro IPR027417 P-loop containing nucleoside triphosphate hydrolase
20 211 CDD cd00268 DEADc
155 163 ProSitePatterns PS00039 DEAD-box subfamily ATP-dependent helicases signature.
155 163 InterPro IPR000629 ATP-dependent RNA helicase DEAD-box, conserved site
4 32 ProSiteProfiles PS51195 DEAD-box RNA helicase Q motif profile.
4 32 InterPro IPR014014 RNA helicase, DEAD-box type, Q motif
35 209 ProSiteProfiles PS51192 Superfamilies 1 and 2 helicase ATP-binding type-1 domain profile.
35 209 InterPro IPR014001 Helicase superfamily 1/2, ATP-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.

Download VMD script Full viewer

Loading 3D structure...

Drag to rotate — click the view, then scroll to zoom.

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
0.85
Show in viewer
Surrounding area
Pocket 2 P2Rank #2
0.351
Show in viewer
Surrounding area
Pocket 3 P2Rank #3
0.07
Show in viewer
Surrounding area
Pocket 4 P2Rank #4
0.061
Show in viewer
Surrounding area
Pocket 5 P2Rank #5
0.033
Show in viewer
Surrounding area
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_A0A0H3GWV4
AlphaFold DB full sequence Viewing
ColabFold VK055_4600
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.

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
8OD PDB via homolog 443.2 Da · LogP -2.45 · TPSA 252.6 Open detail RCSB PDB
8OP PDB via homolog Detail RCSB PDB
8OX PDB via homolog Detail RCSB PDB
ANP PDB via homolog Detail RCSB PDB
BEF 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
8OD RCSB PDB Q72GF3 443.2 Da LogP -2.45 TPSA 252.6 2 viol. ✓ Clean c1nc(c2c(n1)N(C(=O)N2)[C@H]3[C@@H]([C@@H]([C@H]…
8OP RCSB PDB Q72GF3 363.2 Da LogP -2.57 TPSA 206.0 1 viol. ✓ Clean c1nc(c2c(n1)N(C(=O)N2)[C@H]3[C@@H]([C@@H]([C@H]…
8OX RCSB PDB Q72GF3 283.2 Da LogP -2.69 TPSA 159.5 ✓ Ro5 ✓ Clean c1nc(c2c(n1)N(C(=O)N2)[C@H]3[C@@H]([C@@H]([C@H]…
ANP RCSB PDB O01378 506.2 Da LogP -2.06 TPSA 281.9 3 viol. ✓ Clean c1nc(c2c(n1)n(cn2)[C@H]3[C@@H]([C@@H]([C@H](O3)…
BEF RCSB PDB Q92841 66.0 Da LogP 0.88 TPSA 0.0 ✓ Ro5 ✓ Clean [Be-](F)(F)F
CXS RCSB PDB Q9BUQ8 221.3 Da LogP 1.19 TPSA 66.4 ✓ Ro5 ✓ Clean C1CCC(CC1)NCCCS(=O)(=O)O
IHP RCSB PDB Q9BUQ8 660.0 Da LogP -3.13 TPSA 400.6 3 viol. ✓ Clean C1(C(C(C(C(C1OP(=O)(O)O)OP(=O)(O)O)OP(=O)(O)O)O…
M7M RCSB PDB Q9BUQ8 487.3 Da LogP -2.28 TPSA 218.4 2 viol. ✓ Clean CN1CN(C2=C1C(=O)N=C(N2)N(C)C)[C@H]3[C@@H]([C@@H…

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.