X-group (possible homology)

612 Retroviral matrix proteins

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Ligands and drugs

306

Member domains

246

with ligand contacts (≤ 4 Å)

80.4% of members

129

with DrugDomain annotations

42.2% of members

121

with a DrugBank compound

39.5% 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
Homogeneous metal compounds	0	5.8	0	q = 1.4e-3
Lipids and lipid-like molecules	8	1.3	6.07×	not tested
Organic oxygen compounds	4	2.4	1.70×	not tested
Benzenoids	1	0.9	1.16×	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
DB08231	MYR	Myristic acid	61
DB14981	IHP	Phytic acid	21
DB03401	I3P	1D-myo-inositol 1,4,5-trisphosphate	1

Most frequently bound compounds

PDB ligand	Name	Domains in contact
MYR	MYRISTIC ACID	178
PIO	[(2R)-2-octanoyloxy-3-[oxidanyl-[(1R,2R,3S,4R,5R,6S)-2,3,6-tris(oxidanyl)-4,5-diphosphonooxy-cyclohexyl]oxy-phosphoryl]oxy-propyl] octanoate	25
IHP	INOSITOL HEXAKISPHOSPHATE	20
P6G	HEXAETHYLENE GLYCOL	7
PBU	(2R)-3-{[(R)-HYDROXY{[(1R,2R,3S,4R,5R,6S)-2,3,6-TRIHYDROXY-4,5-BIS(PHOSPHONOOXY)CYCLOHEXYL]OXY}PHOSPHORYL]OXY}PROPANE-1,2-DIYL DIBUTANOATE	3
12P	DODECAETHYLENE GLYCOL	2
7PE	2-(2-(2-(2-(2-(2-ETHOXYETHOXY)ETHOXY)ETHOXY)ETHOXY)ETHOXY)ETHANOL	2
1ML	5-{4-[(4-methoxybenzoyl)amino]phenoxy}-2-{[(trans-4-methylcyclohexyl)carbonyl](propan-2-yl)amino}benzoic acid	1
8SP	O-[(R)-{[(2R)-2,3-bis(octanoyloxy)propyl]oxy}(hydroxy)phosphoryl]-L-serine	1
FGV	(1R,2S,3r,4R,5S,6s)-2,4,6-trihydroxycyclohexane-1,3,5-triyl tris[dihydrogen (phosphate)]	1
I3P	D-MYO-INOSITOL-1,4,5-TRIPHOSPHATE	1
PC8	1,2-DIOCTANOYL-SN-GLYCERO-3-PHOSPHOCHOLINE	1