X-group (possible homology)

876 ParB/Sulfiredoxin

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Ligands and drugs

383

Member domains

104

with ligand contacts (≤ 4 Å)

27.2% of members

with DrugDomain annotations

24.8% of members

with a DrugBank compound

23.2% 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
Organic salts	1	0.0	98×	not tested
Nucleosides, nucleotides, and analogues	6	2.7	2.20×	not tested
Homogeneous metal compounds	8	4.8	1.65×	not tested
Organic oxygen compounds	2	2.0	1.02×	not tested
Homogeneous non-metal compounds	2	2.1	0.94×	not tested
Organoheterocyclic compounds	1	1.5	0.66×	not tested
Organic acids and derivatives	1	1.5	0.66×	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
DB04555	CDP	Cytidine-5'-Diphosphate	8
DB00131	AMP	Adenosine phosphate	6
DB00171	ATP	ATP	6
DB16833	ADP	Adenosine disphosphate	5
DB02431	CTP	Cytidine-5'-Triphosphate	4
DB04522	SEP	Dexfosfoserine	2

Most frequently bound compounds

PDB ligand	Name	Domains in contact
MGmetal	MAGNESIUM ION	16
CTP	CYTIDINE-5'-TRIPHOSPHATE	10
CDP	CYTIDINE-5'-DIPHOSPHATE	8
CL	CHLORIDE ION	7
AMP	ADENOSINE MONOPHOSPHATE	6
ATP	ADENOSINE-5'-TRIPHOSPHATE	6
COmetal	COBALT (II) ION	6
ADP	ADENOSINE-5'-DIPHOSPHATE	5
CAmetal	CALCIUM ION	4
TS6	Monothiophosphate	4
SEP	PHOSPHOSERINE	2
UFQ	Cytosine 5'-[gamma-thio]triphosphate	2
7WF	2-hydroxy-3-[4-(2-hydroxy-3-sulfopropyl)piperazin-1-yl]propane-1-sulfonic acid	1
AUC	GOLD (I) CYANIDE ION	1
NAmetal	SODIUM ION	1