X-group (possible homology)

808 Arterivirus nucleocapsid protein

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Ligands and drugs

157

Member domains

with ligand contacts (≤ 4 Å)

38.9% of members

with DrugDomain annotations

40.1% of members

with a DrugBank compound

33.1% of members

Aggregated over all current member domains of this group. Drug annotations come from DrugDomain; buffers and crystallization additives are excluded from the tables below.

Chemical profile

ClassyFire chemical superclasses of the ligands bound by this X-group's proteins, from DrugDomain annotations.

Proteins with classified ligands

Superclasses bound (of 23)

—

Superclasses per 20 proteins

fewer than 20 proteins: too few to compare at equal depth

The raw number of superclasses rises with the number of proteins sampled; the per-20 value compares X-groups at equal depth.

Superclass	Proteins	Expected	Ratio	Significance
Organosulfur compounds	1	0.1	16×	not tested
Organic nitrogen compounds	1	0.1	11×	not tested
Homogeneous non-metal compounds	3	0.6	4.71×	not tested
Organoheterocyclic compounds	1	0.5	2.20×	not tested
Organic acids and derivatives	1	0.5	2.19×	not tested
Organic oxygen compounds	1	0.6	1.70×	not tested
Nucleosides, nucleotides, and analogues	1	0.8	1.22×	not tested
Homogeneous metal compounds	1	1.5	0.69×	not tested

enriched (q < 0.05)depleted (q < 0.05)not significantnot tested (expected < 5)

Unit: a protein (UniProt accession) with a ligand-binding domain in this X-group, counted once per superclass. Expected counts use each superclass's frequency across all ligand-binding X-groups; significance is Fisher's exact test with Benjamini–Hochberg correction. Buffers and crystallization additives are excluded. ECOD v295.2; the method follows the ECOD 2027 update, whose published figures used a slightly different artifact filter.

DrugBank compounds

DrugBank	PDB ligand	Name	Domains
DB04137	GTP	Guanosine-5'-Triphosphate	6
DB01972	5GP	Guanosine-5'-Monophosphate	4
DB02377	GUN	Guanine	3
DB02857	GMP	Guanosine	2
DB04447	DTT	1,4-Dithiothreitol	2

Most frequently bound compounds

PDB ligand	Name	Domains in contact
CL	CHLORIDE ION	17
GTP	GUANOSINE-5'-TRIPHOSPHATE	6
Kmetal	POTASSIUM ION	6
NAmetal	SODIUM ION	6
5GP	GUANOSINE-5'-MONOPHOSPHATE	4
GUN	GUANINE	3
TMO	trimethylamine oxide	3
DTT	2,3-DIHYDROXY-1,4-DITHIOBUTANE	2
GMP	GUANOSINE	2
GKP	(2R,3R)-2,3-bis{[(2E)-3-(3,4-dihydroxyphenyl)prop-2-enoyl]oxy}butanedioic acid	1
LFI	1-[3,5-bis(3-bromanylpropanoyl)-1,3,5-triazinan-1-yl]-3-bromanyl-propan-1-one	1
MGmetal	MAGNESIUM ION	1
SCN	THIOCYANATE ION	1