Protein profile

VK055_0059

arginine--tRNA ligase

Genome: KpATCC43816

Gene: AIK78687.1 argS Structure source: AlphaFold + ColabFold UniProt A6TB43

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Amino acids 577

Annotations 7

Features 41

PDB binders 2

Druggability 0.198

Overview

Basic information about this protein and its source genome.

Accession: VK055_0059
Assembly: Klebsiella pneumoniae subsp. pneumoniae strain ATCC 43816 KPPR1, complete genome
Gene: AIK78687.1 argS
Status: annotated
Amino acids: 577
Structure source: AlphaFold + ColabFold

GO:0005524 Binding to ATP, adenosine 5'-triphosphate, a universally important coenzyme and enzyme regulator. GO:0004812 Catalysis of the formation of aminoacyl-tRNA from ATP, amino acid, and tRNA with the release of diphosphate and AMP. GO:0000166 Binding to a nucleotide, any compound consisting of a nucleoside that is esterified with (ortho)phosphate or an oligophosphate at any hydroxyl group on the ribose or deoxyribose. GO:0006418 The synthesis of aminoacyl tRNA by the formation of an ester bond between the 3'-hydroxyl group of the most 3' adenosine of the tRNA and the alpha carboxylic acid group of an amino acid, to be used in ribosome-mediated polypeptide synthesis. GO:0006420 The process of coupling arginine to arginyl-tRNA, catalyzed by arginyl-tRNA synthetase. The arginyl-tRNA synthetase is a class-I synthetase. The activated amino acid is transferred to the 2'-OH group of an alanine accetping tRNA. The 2'-O-aminoacyl-tRNA will ultimately migrate to the 3' position via transesterification. GO:0004814 Catalysis of the reaction: ATP + L-arginine + tRNA(Arg) = AMP + diphosphate + L-arginyl-tRNA(Arg).

Target profile

Computed evidence for target prioritization.

Human off-target: hit
Human identity (%): 63.333
Human E-value: 3.06e-18
Gut microbiome off-target: hit
Essential (DEG): Y
DEG identity (%): 92.201
DEG E-value: 0.0
Localization: Cytoplasmic
ColabFold pLDDT: 94.24

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 0.198

Structure A6TB43

Pocket Pocket 9

P2Rank 0.766

Structure A6TB43

Pocket Pocket 1

ColabFold model

FPocket 0.08 · Pocket 2

P2Rank 0.772 · Pocket 1

Core conservation Conserved core gene

Roary core

CoreCruncher core

Gut microbiome 178 / 4744 genomes with a hit

Normalized 0.038

Sequence

Primary amino-acid sequence viewer.

Functional Annotations

Enzyme classification and Gene Ontology terms linked to this protein.

7 GO

Gene Ontology (GO)

GO:0005524 Binding to ATP, adenosine 5'-triphosphate, a universally important coenzyme and enzyme regulator.
GO:0004812 Catalysis of the formation of aminoacyl-tRNA from ATP, amino acid, and tRNA with the release of diphosphate and AMP.
GO:0000166 Binding to a nucleotide, any compound consisting of a nucleoside that is esterified with (ortho)phosphate or an oligophosphate at any hydroxyl group on the ribose or deoxyribose.
GO:0006418 The synthesis of aminoacyl tRNA by the formation of an ester bond between the 3'-hydroxyl group of the most 3' adenosine of the tRNA and the alpha carboxylic acid group of an amino acid, to be used in ribosome-mediated polypeptide synthesis.
GO:0006420 The process of coupling arginine to arginyl-tRNA, catalyzed by arginyl-tRNA synthetase. The arginyl-tRNA synthetase is a class-I synthetase. The activated amino acid is transferred to the 2'-OH group of an alanine accetping tRNA. The 2'-O-aminoacyl-tRNA will ultimately migrate to the 3' position via transesterification.
GO:0004814 Catalysis of the reaction: ATP + L-arginine + tRNA(Arg) = AMP + diphosphate + L-arginyl-tRNA(Arg).
GO:0005737 The contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures.

Sequence Features

Domain/signature hits from InterPro and related databases.

41 records

Show feature table

Start	End	DB	Term	Name
1	106	FunFam	G3DSA:3.30.1360.70:FF:000001	Arginine--tRNA ligase
110	453	Gene3D	G3DSA:3.40.50.620	HUPs
110	453	InterPro	IPR014729	Rossmann-like alpha/beta/alpha sandwich fold
454	577	SUPERFAMILY	SSF47323	Anticodon-binding domain of a subclass of class I aminoacyl-tRNA synthetases
454	577	InterPro	IPR009080	Aminoacyl-tRNA synthetase, class Ia, anticodon-binding
1	101	SUPERFAMILY	SSF55190	Arginyl-tRNA synthetase (ArgRS), N-terminal 'additional' domain
1	101	InterPro	IPR036695	Arginyl tRNA synthetase N-terminal domain superfamily
460	577	Pfam	PF05746	DALR anticodon binding domain
460	577	InterPro	IPR008909	DALR anticodon binding
5	577	Hamap	MF_00123	Arginine--tRNA ligase [argS].
5	577	InterPro	IPR001278	Arginine-tRNA ligase
454	577	FunFam	G3DSA:1.10.730.10:FF:000001	Arginine--tRNA ligase
109	454	SUPERFAMILY	SSF52374	Nucleotidylyl transferase
114	385	CDD	cd00671	ArgRS_core
114	385	InterPro	IPR035684	Arginyl-tRNA synthetase, catalytic core domain
122	133	ProSitePatterns	PS00178	Aminoacyl-transfer RNA synthetases class-I signature.
122	133	InterPro	IPR001412	Aminoacyl-tRNA synthetase, class I, conserved site
3	577	NCBIfam	TIGR00456	arginine--tRNA ligase
3	577	InterPro	IPR001278	Arginine-tRNA ligase
96	446	Pfam	PF00750	tRNA synthetases class I (R)
96	446	InterPro	IPR035684	Arginyl-tRNA synthetase, catalytic core domain
422	577	CDD	cd07956	Anticodon_Ia_Arg
1	106	Gene3D	G3DSA:3.30.1360.70	-
1	106	InterPro	IPR036695	Arginyl tRNA synthetase N-terminal domain superfamily
4	577	PANTHER	PTHR11956	ARGINYL-TRNA SYNTHETASE
4	577	InterPro	IPR001278	Arginine-tRNA ligase
7	87	Pfam	PF03485	Arginyl tRNA synthetase N terminal domain
7	87	InterPro	IPR005148	Arginyl tRNA synthetase N-terminal domain
454	577	Gene3D	G3DSA:1.10.730.10	-
153	166	PRINTS	PR01038	Arginyl-tRNA synthetase signature
153	166	InterPro	IPR001278	Arginine-tRNA ligase
129	145	PRINTS	PR01038	Arginyl-tRNA synthetase signature
129	145	InterPro	IPR001278	Arginine-tRNA ligase
114	129	PRINTS	PR01038	Arginyl-tRNA synthetase signature
114	129	InterPro	IPR001278	Arginine-tRNA ligase
303	324	PRINTS	PR01038	Arginyl-tRNA synthetase signature
303	324	InterPro	IPR001278	Arginine-tRNA ligase
460	577	SMART	SM00836	dalr_1_4
109	453	FunFam	G3DSA:3.40.50.620:FF:000030	Arginine--tRNA ligase
1	87	SMART	SM01016	Arg_tRNA_synt_N_2
1	87	InterPro	IPR005148	Arginyl tRNA synthetase N-terminal domain

3D Structure

Selected loaded structure. Experimental PDB entries may cover only a portion of the sequence; predicted models typically cover the full protein.

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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_A6TB43	AlphaFold	—	—	full sequence	—	Viewing
ColabFold VK055_0059	ColabFold	—	—	full sequence	—	Loaded

Pocket details FPocket · P2Rank — toggle visibility and zoom from here, or open full viewer

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	9.86	0.53
2	2.49	0.069
3	2.33	0.06
4	2.31	0.059
5	1.92	0.039

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	7.23	0.377
2	2.56	0.073
3	2.26	0.056
4	2.25	0.056
5	1.81	0.034

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

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
ANP	2ZUE	O59147	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)…`
GGB	4Q2X	P54136	176.2 Da LogP -1.80 TPSA 134.5	✓ Ro5	✓ Clean	`[H]/N=C(\N)/NOCC[C@@H](C(=O)O)N`

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).

Ligand	UniProt (homolog)	pchembl	MW · LogP · TPSA	Lipinski	PAINS	SMILES
CHEMBL1160244	P54136	8.35	502.5 Da LogP -4.00 TPSA 279.7	3 viol.	✓ Clean	`N=C(N)NCCC[C@H](N)C(=O)NS(=O)(=O)OC[C@H]1O[C@@H…`
CHEMBL434782	P54136	8.12	489.4 Da LogP -2.25 TPSA 263.0	2 viol.	✓ Clean	`N=C(N)NCCC[C@H](N)COP(=O)(O)OC[C@H]1O[C@@H](n2c…`

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
ZINC12360002	0.810	427.2 Da LogP -1.75 TPSA 232.6	2 viol.	✓ Clean	`Nc1ncnc2c1ncn2[C@@H]1O[C@H](CO[P@@](=O)(O)OP(=O…`
ZINC12360703	0.810	427.2 Da LogP -1.75 TPSA 232.6	2 viol.	✓ Clean	`Nc1ncnc2c1ncn2[C@@H]1O[C@H](CO[P@@](=O)(O)OP(=O…`
ZINC12503599	0.810	427.2 Da LogP -1.75 TPSA 232.6	2 viol.	✓ Clean	`Nc1ncnc2c1ncn2[C@@H]1O[C@H](CO[P@@](=O)(O)OP(=O…`
ZINC16546165	0.810	427.2 Da LogP -1.75 TPSA 232.6	2 viol.	✓ Clean	`Nc1ncnc2c1ncn2[C@H]1O[C@H](CO[P@](=O)(O)OP(=O)(…`
ZINC31977053	0.810	427.2 Da LogP -1.75 TPSA 232.6	2 viol.	✓ Clean	`Nc1ncnc2c1ncn2[C@H]1O[C@@H](CO[P@](=O)(O)OP(=O)…`
ZINC4806433	0.810	427.2 Da LogP -1.75 TPSA 232.6	2 viol.	✓ Clean	`Nc1ncnc2c1ncn2[C@@H]1O[C@H](CO[P@@](=O)(O)OP(=O…`
ZINC53683898	0.810	427.2 Da LogP -1.75 TPSA 232.6	2 viol.	✓ Clean	`Nc1ncnc2c1ncn2[C@@H]1O[C@@H](CO[P@@](=O)(O)OP(=…`
ZINC8586019	0.810	427.2 Da LogP -1.75 TPSA 232.6	2 viol.	✓ Clean	`Nc1ncnc2c1ncn2[C@H]1O[C@@H](CO[P@](=O)(O)OP(=O)…`
ZINC8586020	0.810	427.2 Da LogP -1.75 TPSA 232.6	2 viol.	✓ Clean	`Nc1ncnc2c1ncn2[C@@H]1O[C@@H](CO[P@@](=O)(O)OP(=…`
ZINC8586021	0.810	427.2 Da LogP -1.75 TPSA 232.6	2 viol.	✓ Clean	`Nc1ncnc2c1ncn2[C@H]1O[C@@H](CO[P@@](=O)(O)OP(=O…`
ZINC8586022	0.810	427.2 Da LogP -1.75 TPSA 232.6	2 viol.	✓ Clean	`Nc1ncnc2c1ncn2[C@@H]1O[C@@H](CO[P@@](=O)(O)OP(=…`
ZINC13518964	0.741	347.2 Da LogP -1.86 TPSA 186.1	✓ Ro5	✓ Clean	`Nc1ncnc2c1ncn2[C@@H]1O[C@@H](COP(=O)(O)O)[C@H](…`
ZINC1532515	0.741	347.2 Da LogP -1.86 TPSA 186.1	✓ Ro5	✓ Clean	`Nc1ncnc2c1ncn2[C@H]1O[C@@H](COP(=O)(O)O)[C@H](O…`
ZINC1571045	0.741	347.2 Da LogP -1.86 TPSA 186.1	✓ Ro5	✓ Clean	`Nc1ncnc2c1ncn2[C@@H]1O[C@@H](COP(=O)(O)O)[C@@H]…`
ZINC1842158	0.741	347.2 Da LogP -1.86 TPSA 186.1	✓ Ro5	✓ Clean	`Nc1ncnc2c1ncn2[C@H]1O[C@@H](COP(=O)(O)O)[C@H](O…`
ZINC2046931	0.741	347.2 Da LogP -1.86 TPSA 186.1	✓ Ro5	✓ Clean	`Nc1ncnc2c1ncn2[C@@H]1O[C@@H](COP(=O)(O)O)[C@H](…`
ZINC2126310	0.741	347.2 Da LogP -1.86 TPSA 186.1	✓ Ro5	✓ Clean	`Nc1ncnc2c1ncn2[C@@H]1O[C@H](COP(=O)(O)O)[C@@H](…`
ZINC3201891	0.741	347.2 Da LogP -1.86 TPSA 186.1	✓ Ro5	✓ Clean	`Nc1ncnc2c1ncn2[C@@H]1O[C@@H](COP(=O)(O)O)[C@@H]…`
ZINC3201893	0.741	347.2 Da LogP -1.86 TPSA 186.1	✓ Ro5	✓ Clean	`Nc1ncnc2c1ncn2[C@H]1O[C@@H](COP(=O)(O)O)[C@@H](…`
ZINC3830180	0.741	347.2 Da LogP -1.86 TPSA 186.1	✓ Ro5	✓ Clean	`Nc1ncnc2c1ncn2[C@H]1O[C@@H](COP(=O)(O)O)[C@@H](…`
ZINC3860156	0.741	347.2 Da LogP -1.86 TPSA 186.1	✓ Ro5	✓ Clean	`Nc1ncnc2c1ncn2[C@@H]1O[C@H](COP(=O)(O)O)[C@@H](…`
ZINC3977897	0.741	347.2 Da LogP -1.86 TPSA 186.1	✓ Ro5	✓ Clean	`Nc1ncnc2c1ncn2[C@H]1O[C@H](COP(=O)(O)O)[C@@H](O…`
ZINC4806442	0.741	347.2 Da LogP -1.86 TPSA 186.1	✓ Ro5	✓ Clean	`Nc1ncnc2c1ncn2[C@@H]1O[C@H](COP(=O)(O)O)[C@H](O…`
ZINC8613167	0.741	347.2 Da LogP -1.86 TPSA 186.1	✓ Ro5	✓ Clean	`Nc1ncnc2c1ncn2[C@@H]1O[C@H](COP(=O)(O)O)[C@H](O…`
ZINC4096224	0.729	346.2 Da LogP -1.90 TPSA 191.9	✓ Ro5	✓ Clean	`Nc1ncnc2c1ncn2[C@@H]1O[C@H](CO[P@](N)(=O)O)[C@@…`
ZINC12503850	0.726	427.3 Da LogP -2.04 TPSA 229.4	1 viol.	✓ Clean	`Nc1ncnc2c1ncn2[C@@H]1O[C@H](CO[P@](=O)(O)OS(=O)…`
ZINC141161066	0.726	427.3 Da LogP -2.04 TPSA 229.4	1 viol.	✓ Clean	`Nc1ncnc2c1ncn2[C@@H]1O[C@H](CO[P@](=O)(O)OS(=O)…`
ZINC141163786	0.726	427.3 Da LogP -2.04 TPSA 229.4	1 viol.	✓ Clean	`Nc1ncnc2c1ncn2[C@@H]1O[C@H](CO[P@](=O)(O)OS(=O)…`
ZINC4228246	0.726	427.3 Da LogP -2.04 TPSA 229.4	1 viol.	✓ Clean	`Nc1ncnc2c1ncn2[C@@H]1O[C@H](CO[P@@](=O)(O)OS(=O…`
ZINC105372833	0.712	345.3 Da LogP -1.93 TPSA 197.6	✓ Ro5	✓ Clean	`Nc1ncnc2c1ncn2[C@@H]1O[C@H](COP(N)(N)=O)[C@H](O…`
ZINC105372837	0.712	345.3 Da LogP -1.93 TPSA 197.6	✓ Ro5	✓ Clean	`Nc1ncnc2c1ncn2[C@@H]1O[C@H](COP(N)(N)=O)[C@H](O…`
ZINC17107643	0.712	345.3 Da LogP -1.93 TPSA 197.6	✓ Ro5	✓ Clean	`Nc1ncnc2c1ncn2[C@@H]1O[C@H](COP(N)(N)=O)[C@@H](…`
ZINC204538551	0.712	345.3 Da LogP -1.93 TPSA 197.6	✓ Ro5	✓ Clean	`Nc1ncnc2c1ncn2[C@@H]1O[C@H](COP(N)(N)=O)[C@@H](…`
ZINC31475423	0.703	434.3 Da LogP -2.99 TPSA 238.4	2 viol.	✓ Clean	`Nc1ncnc2c1ncn2[C@H]1O[C@H](CO[P@@](=O)(O)OC(=O)…`
ZINC105469665	0.694	425.2 Da LogP -1.64 TPSA 223.4	2 viol.	✓ Clean	`Nc1ncnc2c1ncn2[C@@H]1O[C@H](CO[P@@](=O)(O)CP(=O…`
ZINC13527614	0.694	425.2 Da LogP -1.64 TPSA 223.4	2 viol.	✓ Clean	`Nc1ncnc2c1ncn2[C@@H]1O[C@H](CO[P@](=O)(O)CP(=O)…`
ZINC219330894	0.694	425.2 Da LogP -1.64 TPSA 223.4	2 viol.	✓ Clean	`Nc1ncnc2c1ncn2[C@@H]1O[C@H](CO[P@](=O)(O)CP(=O)…`
ZINC3873852	0.694	425.2 Da LogP -1.64 TPSA 223.4	2 viol.	✓ Clean	`Nc1ncnc2c1ncn2[C@H]1O[C@@H](CO[P@](=O)(O)CP(=O)…`
ZINC3873853	0.694	425.2 Da LogP -1.64 TPSA 223.4	2 viol.	✓ Clean	`Nc1ncnc2c1ncn2[C@@H]1O[C@@H](CO[P@](=O)(O)CP(=O…`
ZINC3873854	0.694	425.2 Da LogP -1.64 TPSA 223.4	2 viol.	✓ Clean	`Nc1ncnc2c1ncn2[C@H]1O[C@@H](CO[P@](=O)(O)CP(=O)…`
ZINC3873855	0.694	425.2 Da LogP -1.64 TPSA 223.4	2 viol.	✓ Clean	`Nc1ncnc2c1ncn2[C@@H]1O[C@@H](CO[P@](=O)(O)CP(=O…`
ZINC5615251	0.677	375.3 Da LogP -0.55 TPSA 164.1	1 viol.	✓ Clean	`COP(=O)(OC)OC[C@H]1O[C@@H](n2cnc3c(N)ncnc32)[C@…`
ZINC5615253	0.677	375.3 Da LogP -0.55 TPSA 164.1	1 viol.	✓ Clean	`COP(=O)(OC)OC[C@@H]1O[C@@H](n2cnc3c(N)ncnc32)[C…`
ZINC5615258	0.677	375.3 Da LogP -0.55 TPSA 164.1	1 viol.	✓ Clean	`COP(=O)(OC)OC[C@H]1O[C@@H](n2cnc3c(N)ncnc32)[C@…`
ZINC5615263	0.677	375.3 Da LogP -0.55 TPSA 164.1	1 viol.	✓ Clean	`COP(=O)(OC)OC[C@@H]1O[C@@H](n2cnc3c(N)ncnc32)[C…`
ZINC31516918	0.672	446.4 Da LogP -1.33 TPSA 218.2	1 viol.	✓ Clean	`CC(C)[C@H](N)C(=O)O[P@](=O)(O)OC[C@H]1O[C@@H](n…`
ZINC1582675	0.667	403.3 Da LogP 0.23 TPSA 164.1	1 viol.	✓ Clean	`CCOP(=O)(OCC)OC[C@H]1O[C@@H](n2cnc3c(N)ncnc32)[…`
ZINC5486730	0.667	403.3 Da LogP 0.23 TPSA 164.1	1 viol.	✓ Clean	`CCOP(=O)(OCC)OC[C@H]1O[C@@H](n2cnc3c(N)ncnc32)[…`
ZINC5486734	0.667	403.3 Da LogP 0.23 TPSA 164.1	1 viol.	✓ Clean	`CCOP(=O)(OCC)OC[C@@H]1O[C@@H](n2cnc3c(N)ncnc32)…`
ZINC5486740	0.667	403.3 Da LogP 0.23 TPSA 164.1	1 viol.	✓ Clean	`CCOP(=O)(OCC)OC[C@@H]1O[C@@H](n2cnc3c(N)ncnc32)…`

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.