Relationship of different nomenclature systems to TAAR families
| TAAR Nomenclature | Previous Nomenclatures | Maximum Functional Isoforms | Possible Pseudogenes | Ligand Tuning | Notes |
|---|---|---|---|---|---|
| TAAR1 | TRAR1, TA1, TAR1, TA1 | 1 | 2 | Primary amines | Two pseudogenes only reported in the bottlenose dolphin |
| The elephant shark is the only other species with multiple isoforms reported (one functional, one pseudogene) | |||||
| TAAR2 | GPR58 | 2 | 2 (lesser hedgehog tennec), 1 (multiple species) | Primary amines | TAAR2 is the only tetrapod TAAR gene to contain multiple (2) exons |
| The chicken is the only species reported to have two functional TAAR2 genes | |||||
| TAAR3 | GPR57P | 1 | 1 | Primary amines | |
| TAAR4 | TA2P, 5-HT4P, TA2 | 5 | 2 | Primary amines | |
| TAAR5 | PNR | 2 | 1 | Tertiary amines | The horse is the only species reported to have multiple functional isoforms |
| TAAR6 | TRAR4, TA4 | 5 | 6 | Tertiary amines | |
| Diamine binding pocket | |||||
| TAAR7 | TA12 (TAAR7a) | 16 | 4 | Tertiary amines | |
| TA15 (TAAR7d) | |||||
| TA14 (TAAR7e) | |||||
| TA13P (TAAR7f) | |||||
| TA9 (TAAR 7g) | |||||
| TA6 (TAAR7h) | |||||
| TAAR8 | TRAR5, TA5, TAR5, GPR102 | 3 | 3 | Tertiary amines | |
| TA11 (TAAR8a) | Diamine binding pocket | ||||
| TA7 (TAAR8b) | |||||
| TA10 (TAAR8c) | |||||
| TAAR9 | TRAR3, TA3, TAR3 | 7 | 1 | Tertiary amines | |
| TAAR E1 | 2 | 2 | Novel family recently proposed | ||
| TAAR M1 | 1 | 1 | Novel family recently proposed. Only present in marsupials | ||
| TAAR M2 | 9 | 2 | Novel family recently proposed. Only present in marsupials | ||
| TAAR M3 | 5 | 1 | Novel family recently proposed. Only present in marsupials | ||
| Teleost-specific isoforms | Up to 24 species-specific pseudogenes are present but individual pseudogene isoforms have rarely been reported | ||||
| TAAR10 | 5 | ||||
| TAAR11 | zTA1a | 1 | |||
| TAAR12 | zTA69 (TAAR12b) | 13 | |||
| zTA71 (TAAR12d) | |||||
| zTA72 (TAAR12f) | |||||
| zTA73 (TAAR12k) | |||||
| TAAR13 | zTA64 (TAAR13b) | 5 | Diamines (TAAR13c) | ||
| zTA65 (TAAR13c) | |||||
| zTA66 (TAAR13e) | |||||
| TAAR14 | zTA70 (TAAR14d) | 12 | Diamine binding pocket in some isoforms | ||
| zTA68 (TAAR14i) | |||||
| zTA67 (TAAR14k) | |||||
| TAAR15 | 2 | ||||
| TAAR16 | zTA63 (TAAR16c) | 7 | |||
| zTA62 (TAAR16e) | |||||
| zTA36 (TAAR16f) | |||||
| zTA35 (TAAR16g) | |||||
| TAAR17 | zTA48 (TAAR17a) | 3 | |||
| zTA47 (TAAR17b) | |||||
| zTA49 (TAAR17c) | |||||
| TAAR18 | zTA28 (TAAR18d) | 11 | |||
| zTA61 (TAAR18f) | |||||
| zTA27 (TAAR18g) | |||||
| zTA18 (TAAR18h) | |||||
| zTA19 (TAAR18i) | |||||
| zTA20 (TAAR18j) | |||||
| TAAR19 | zTA54 (TAAR19c) | 22 | |||
| zTA34 (TAAR19d) | |||||
| zTA59 (TAAR19f) | |||||
| zTA33 (TAAR19g) | |||||
| zTA50 (TAAR19h) | |||||
| zTA31 (TAAR19i) | |||||
| zTA32 (TAAR19l) | |||||
| zTA51 (TAAR19o) | |||||
| zTA29 (TAAR19q) | |||||
| zTA30 (TAAR19s) | |||||
| zTA16 (TAAR19u) | |||||
| TAAR20 | zTA44 (TAAR20a) | 30 | |||
| zTA23 (TAAR20a1) | |||||
| zTA39 (TAAR20b) | |||||
| zTA21 (TAAR20b1) | |||||
| zTA45 (TAAR20c) | |||||
| zTA40 (TAAR20d) | |||||
| zTA38 (TAAR20e) | |||||
| zTA41 (TAAR20f) | |||||
| zTA43 (TAAR20i) | |||||
| zTA53 (TAAR20j) | |||||
| zTA25 (TAAR20k) | |||||
| zTA57 (TAAR20l) | |||||
| zTA24 (TAAR20m) | |||||
| zTA42 (TAAR20o) | |||||
| zTA90+ (TAAR20p) | |||||
| zTA91+ (TAAR20q) | |||||
| zTA37 (TAAR20r) | |||||
| zTA56 (TAAR20t) | |||||
| zTA55 (TAAR20u) | |||||
| zTA46 (TAAR20w) | |||||
| zTA26 (TAAR20x) | |||||
| zTA22 (TAAR20y) | |||||
| zTA52 (TAAR20z) | |||||
| TAAR21 | 6 | ||||
| TAAR22 | 6 | ||||
| TAAR23 | 15 | ||||
| TAAR24 | 3 | ||||
| TAAR25 | 12 | ||||
| TAAR26 | 28 | ||||
| TAAR27 | 6 | ||||
| TAAR28 | 8 | ||||
| Lamprey outgroups | |||||
| TAAR-like | 25 | 17 |
GPR57, G protein–coupled receptor 57; GPR58, G protein–coupled receptor 58; PNR, putative neurotransmitter receptor.