ECOD
X-group (possible homology)

6037 Subunit VI of Photosystem I reaction centre

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Ligands and drugs

56
Member domains
49
with ligand contacts (≤ 4 Å)
87.5% of members
37
with DrugDomain annotations
66.1% of members
37
with a DrugBank compound
66.1% 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.

13
Proteins with classified ligands
2
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.

SuperclassProteinsExpected
0.25×observed / expected4×
RatioSignificance
Homogeneous metal compounds06.30q = 7.4e-4
Lipids and lipid-like molecules121.48.41×not tested
Organoheterocyclic compounds122.06.08×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

DrugBankPDB ligandNameDomains
DB02133CLAChlorophyll A31
DB06755BCRBeta carotene29
DB03279LMUDodecyl-Alpha-D-Maltoside4
DB02043LHG1,2-Dipalmitoyl-Phosphatidyl-Glycerole3

Most frequently bound compounds

PDB ligandNameDomains in contact
CLACHLOROPHYLL A49
BCRBETA-CAROTENE21
LHG1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE5
LMG1,2-DISTEAROYL-MONOGALACTOSYL-DIGLYCERIDE3
LMUDODECYL-ALPHA-D-MALTOSIDE3
SQD1,2-DI-O-ACYL-3-O-[6-DEOXY-6-SULFO-ALPHA-D-GLUCOPYRANOSYL]-SN-GLYCEROL3
8CT(6'R,11cis,11'cis,13cis,15cis)-4',5'-didehydro-5',6'-dihydro-beta,beta-carotene2
CL0CHLOROPHYLL A ISOMER2
NEX(1R,3R)-6-{(3E,5E,7E,9E,11E,13E,15E,17E)-18-[(1S,4R,6R)-4-HYDROXY-2,2,6-TRIMETHYL-7-OXABICYCLO[4.1.0]HEPT-1-YL]-3,7,12,16-TETRAMETHYLOCTADECA-1,3,5,7,9,11,13,15,17-NONAENYLIDENE}-1,5,5-TRIMETHYLCYCLOHEXANE-1,3-DIOL1