X-group (possible homology)

3010 C-terminal subdomain in Lon-related proteases catalytic domains

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Ligands and drugs

821

Member domains

with ligand contacts (≤ 4 Å)

11.9% of members

with DrugDomain annotations

10.7% of members

with a DrugBank compound

8.2% 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	2	0.2	11×	not tested
Organic acids and derivatives	6	1.4	4.37×	not tested
Organic nitrogen compounds	1	0.3	3.53×	not tested
Homogeneous metal compounds	3	4.4	0.69×	not tested
Organic oxygen compounds	1	1.8	0.57×	not tested
Homogeneous non-metal compounds	1	1.9	0.52×	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
DB00188	BO2	Bortezomib	22
DB03345	BME	Mercaptoethanol	5
DB00536	GAI	Guanidine	4
DB00139	SIN	Succinic acid	2
DB03904	URE	Urea	1

Most frequently bound compounds

PDB ligand	Name	Domains in contact
BO2	N-[(1R)-1-(DIHYDROXYBORYL)-3-METHYLBUTYL]-N-(PYRAZIN-2-YLCARBONYL)-L-PHENYLALANINAMIDE	31
4KZ	N-[(1R)-1-(dihydroxyboranyl)-2-phenylethyl]-Nalpha-(pyrazin-2-ylcarbonyl)-L-phenylalaninamide	11
GAI	GUANIDINE	6
BME	BETA-MERCAPTOETHANOL	5
CAmetal	CALCIUM ION	2
MGmetal	MAGNESIUM ION	2
NAmetal	SODIUM ION	2
SIN	SUCCINIC ACID	2
UFY	N-[(1R)-1-borono-3-methylbutyl]-Nalpha-(pyrazine-2-carbonyl)-D-phenylalaninamide	2
UKS	[(1R)-4-phenyl-1-{[N-(pyrazine-2-carbonyl)-D-norvalyl]amino}butyl]boronic acid	2
CIX	N-[(benzyloxy)carbonyl]-L-leucyl-N-[(1R)-1-(dihydroxyboranyl)-3-methylbutyl]-L-leucinamide	1
CL	CHLORIDE ION	1
SLA	Omuralide, open form	1
URE	UREA	1