X-group (possible homology)

881 Mog1p/PsbP-like

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Ligands and drugs

588

Member domains

with ligand contacts (≤ 4 Å)

9.7% of members

with DrugDomain annotations

9.5% of members

with a DrugBank compound

5.8% 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	9	8.2	1.09×	q = 0.87
Homogeneous non-metal compounds	6	3.6	1.66×	not tested
Organic oxygen compounds	4	3.3	1.20×	not tested
Organic acids and derivatives	1	2.6	0.39×	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
DB02618	NDS	Ethyl Dimethyl Ammonio Propane Sulfonate	2

Most frequently bound compounds

PDB ligand	Name	Domains in contact
CAmetal	CALCIUM ION	5
ZNmetal	ZINC ION	5
CL	CHLORIDE ION	3
AZI	AZIDE ION	2
GLC	alpha-D-glucopyranose	2
LHG	1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE	2
NAmetal	SODIUM ION	2
NDS	ETHYL DIMETHYL AMMONIO PROPANE SULFONATE	2
BR	BROMIDE ION	1
CYS	CYSTEINE	1
HGmetal	MERCURY (II) ION	1
IOD	IODIDE ION	1
L6T	alpha-D-glucopyranosyl 6-O-dodecyl-alpha-D-glucopyranoside	1
MGmetal	MAGNESIUM ION	1
MNmetal	MANGANESE (II) ION	1
P6G	HEXAETHYLENE GLYCOL	1
TBmetal	TERBIUM(III) ION	1