X-group (possible homology)

6036 Subunit N of Photosystem I reaction centre

Ligands and drugs

9
Member domains
5
with ligand contacts (≤ 4 Å)
55.6% of members
4
with DrugDomain annotations
44.4% of members
4
with a DrugBank compound
44.4% 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.

4
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
Lipids and lipid-like molecules40.49.11×not tested
Organoheterocyclic compounds20.63.29×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
DB03279LMUDodecyl-Alpha-D-Maltoside3
DB02133CLAChlorophyll A2
DB03426DGDDigalactosyl Diacyl Glycerol (Dgdg)1
DB06755BCRBeta carotene1

Most frequently bound compounds

PDB ligandNameDomains in contact
CLACHLOROPHYLL A3
LMUDODECYL-ALPHA-D-MALTOSIDE3
BCRBETA-CAROTENE2
CHLCHLOROPHYLL B2
LMG1,2-DISTEAROYL-MONOGALACTOSYL-DIGLYCERIDE2
DGDDIGALACTOSYL DIACYL GLYCEROL (DGDG)1
HTGheptyl 1-thio-beta-D-glucopyranoside1
LHG1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE1