X-group (possible homology)

5044 PsbZ-like

Open in classification tree →

Ligands and drugs

435

Member domains

327

with ligand contacts (≤ 4 Å)

75.2% of members

232

with DrugDomain annotations

53.3% of members

226

with a DrugBank compound

52.0% 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	6.3	0	q = 7.4e-4
Lipids and lipid-like molecules	13	1.4	9.11×	not tested
Organoheterocyclic compounds	6	2.0	3.04×	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
DB06755	BCR	Beta carotene	226
DB02133	CLA	Chlorophyll A	62
DB02043	LHG	1,2-Dipalmitoyl-Phosphatidyl-Glycerole	27
DB03193	STE	Stearic acid	14

Most frequently bound compounds

PDB ligand	Name	Domains in contact
CLA	CHLOROPHYLL A	319
BCR	BETA-CAROTENE	312
LMG	1,2-DISTEAROYL-MONOGALACTOSYL-DIGLYCERIDE	133
LHG	1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE	38
STE	STEARIC ACID	16
8CT	(6'R,11cis,11'cis,13cis,15cis)-4',5'-didehydro-5',6'-dihydro-beta,beta-carotene	13
UNL	Unknown ligand	13
CHL	CHLOROPHYLL B	6
KC2	Chlorophyll c2	4
WVN	1,3,3-trimethyl-2-[(1E,3E,5E,7E,9E,11E,13E,15E,17E)-3,7,12,16-tetramethyl-18-[(1R)-2,6,6-trimethylcyclohex-2-en-1-yl]octadeca-1,3,5,7,9,11,13,15,17-nonaenyl]cyclohexene	4
LMU	DODECYL-ALPHA-D-MALTOSIDE	3
A86	(3S,3'S,5R,5'R,6S,6'R,8'R)-3,5'-dihydroxy-8-oxo-6',7'-didehydro-5,5',6,6',7,8-hexahydro-5,6-epoxy-beta,beta-caroten-3'-yl acetate	2
DMU	DECYL-BETA-D-MALTOPYRANOSIDE	2
II0	(1~{R})-3,5,5-trimethyl-4-[(3~{E},5~{E},7~{E},9~{E},11~{E},13~{E},15~{E})-3,7,12,16-tetramethyl-18-[(4~{R})-2,6,6-trimethyl-4-oxidanyl-cyclohexen-1-yl]octadeca-3,5,7,9,11,13,15-heptaen-1,17-diynyl]cyclohex-3-en-1-ol	2
LFA	EICOSANE	1
SQD	1,2-DI-O-ACYL-3-O-[6-DEOXY-6-SULFO-ALPHA-D-GLUCOPYRANOSYL]-SN-GLYCEROL	1