Receptor names:
G Protein complexes
⬤ Gαs ⬤ Gαi/o ⬤ Gαq/11 ⬤ Gα12/13 ⬤ GPa1

Class A
(Rhodopsin)

Class A
(Orphans)

Class B1
(Secretin)

Class B2
(Adhesion)

Class C
(Glutamate)

Class F
(Frizzled)

Class T
(Taste 2)

Gs Gi/o Gq/11 G12/13 GPa1 Total
Class A (Rhodopsin) 45 98 54 7 0 204
Class B1 (Secretin) 14 0 1 0 0 15
Class B2 (Adhesion) 5 3 2 2 0 12
Class C (Glutamate) 0 10 0 0 0 10
Class D1 (Ste2-like fungal pheromone) 0 0 0 0 1 1
Class F (Frizzled) 3 1 1 0 0 5
Class O1 (Olfactory/extra-nasal 1) 4 0 0 0 0 4
Class O2 (Olfactory/extra-nasal 2) 8 0 0 0 0 8
Class T2 (Taste 2) 0 5 0 0 0 5
Class V (Vomeronasal) 0 0 0 0 0 0
Class U (Unclassified) 0 0 0 0 0 0
Total Complexes 81 119 55 8 1 264
G protein only 2 5 2 2 0 11
Total 83 124 57 10 1 275
Gs Gi/o Gq/11 G12/13 GPa1 Total
Class A (Rhodopsin) 292 674 230 13 0 1209
Class B1 (Secretin) 158 3 5 0 0 166
Class B2 (Adhesion) 21 6 5 10 0 42
Class C (Glutamate) 1 20 6 0 0 27
Class D1 (Ste2-like fungal pheromone) 0 0 0 0 1 1
Class F (Frizzled) 4 5 1 0 0 10
Class O1 (Olfactory/extra-nasal 1) 4 0 0 0 0 4
Class O2 (Olfactory/extra-nasal 2) 13 0 0 0 0 13
Class T2 (Taste 2) 0 31 0 0 0 31
Class V (Vomeronasal) 0 0 0 0 0 0
Class U (Unclassified) 0 0 0 0 0 0
Total Complexes 493 739 247 23 1 1503
G protein only 32 83 15 5 0 135
Total 525 822 262 28 1 1638

Specific sets of structures can be downloaded from the Structures page.
The latest released structure is from 2026-07-15.