5020 Subunit VIII of photosystem I reaction centre, PsaI
Ligands and drugs
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.
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 | 0.25×observed / expected4× | Ratio | Significance |
|---|---|---|---|---|---|
| Homogeneous metal compounds | 0 | 13.1 | 0 | q < 0.0001 | |
| Homogeneous non-metal compounds | 0 | 5.7 | 0 | q = 7.0e-3 | |
| Nucleosides, nucleotides, and analogues | 0 | 7.4 | 0 | q = 8.2e-4 | |
| Organic oxygen compounds | 0 | 5.3 | 0 | q = 0.01 | |
| Lipids and lipid-like molecules | 26 | 3.0 | 8.77× | not tested | |
| Organoheterocyclic compounds | 23 | 4.1 | 5.61× | not tested |
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 | 153 |
| DB02133 | CLA | Chlorophyll A | 112 |
| DB02043 | LHG | 1,2-Dipalmitoyl-Phosphatidyl-Glycerole | 46 |
| DB01022 | PQN | Phylloquinone | 5 |
| DB03279 | LMU | Dodecyl-Alpha-D-Maltoside | 5 |
| DB12148 | 1L3 | Menatetrenone | 3 |
| DB00137 | LUT | (3R,3'R,6S)-4,5-DIDEHYDRO-5,6-DIHYDRO-BETA,BETA-CAROTENE-3,3'-DIOL | 1 |
| DB03426 | DGD | Digalactosyl Diacyl Glycerol (Dgdg) | 1 |
Most frequently bound compounds
| PDB ligand | Name | Domains in contact |
|---|---|---|
| CLA | CHLOROPHYLL A | 211 |
| BCR | BETA-CAROTENE | 199 |
| LHG | 1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE | 60 |
| LMG | 1,2-DISTEAROYL-MONOGALACTOSYL-DIGLYCERIDE | 43 |
| SQD | 1,2-DI-O-ACYL-3-O-[6-DEOXY-6-SULFO-ALPHA-D-GLUCOPYRANOSYL]-SN-GLYCEROL | 18 |
| UNL | Unknown ligand | 14 |
| PQN | PHYLLOQUINONE | 13 |
| F6C | Chlorophyll F | 12 |
| ECH | beta,beta-caroten-4-one | 8 |
| EQ3 | (3'R)-3'-hydroxy-beta,beta-caroten-4-one | 8 |
| 8CT | (6'R,11cis,11'cis,13cis,15cis)-4',5'-didehydro-5',6'-dihydro-beta,beta-carotene | 7 |
| 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 | 6 |
| LUT | (3R,3'R,6S)-4,5-DIDEHYDRO-5,6-DIHYDRO-BETA,BETA-CAROTENE-3,3'-DIOL | 5 |
| AJP | Digitonin | 4 |
| CL7 | CHLOROPHYLL D | 4 |
| LMU | DODECYL-ALPHA-D-MALTOSIDE | 4 |
| 1L3 | Menaquinone-4 | 3 |
| IHT | (1~{R})-3,5,5-trimethyl-4-[(3~{E},5~{E},7~{E},9~{E},11~{E},13~{E},15~{E},17~{E})-3,7,12,16-tetramethyl-18-(2,6,6-trimethylcyclohexen-1-yl)octadeca-3,5,7,9,11,13,15,17-octaen-1-ynyl]cyclohex-3-en-1-ol | 3 |
| 3PH | 1,2-DIACYL-GLYCEROL-3-SN-PHOSPHATE | 2 |
| DGD | DIGALACTOSYL DIACYL GLYCEROL (DGDG) | 2 |