Tachykinin receptor 2

Identifiers

TACR2 Gene

Gene Ontology
Molecular function	• substance K receptor activity
Cellular component	• integral to plasma membrane
Biological process	• positive regulation of uterine smooth muscle contraction
Sources: QuickGO

RNA expression pattern

Substance-K receptor is a protein that in humans is encoded by the TACR2 gene.^[1]

This gene belongs to a family of genes that function as receptors for tachykinins. Receptor affinities are specified by variations in the 5'-end of the sequence. The receptors belonging to this family are characterized by interactions with G proteins and 7 hydrophobic transmembrane regions. This gene encodes the receptor for the tachykinin neuropeptide substance K, also referred to as neurokinin A.^[1]

1 Selective Ligands
- 1.1 Agonists
- 1.2 Antagonists
2 See also
3 References
4 External links
5 Further reading

Selective Ligands

Several selective ligands for NK₂ are now available, and although most of the compounds developed so far are peptides, one small-molecule antagonist Saredutant is currently in clinical trials as an anxiolytic and antidepressant.

Agonists

GR-64349 - potent and selective agonist, EC₅₀ 3.7nM, 7-amino acid polypeptide chain. CAS# 137593-52-3

Antagonists

Ibodutant
Saredutant
GR-159,897
MEN-10376 - potent and selective antagonist, 7-amino acid polypeptide chain. CAS# 135306-85-3

References

External links

Adrenergic	α1 (A B D) α2 (A B C) β1 β2 β3

Purinergic	Adenosine (A1 A2A A2B A3) P2Y (1 2 4 5 6 8 9 10 11 12 13 14)

Serotonin	(all but 5-HT3) 5-HT1 (A B D E F) 5-HT2 (A B C) 5-HT (4 5A 6 7)

Other	Acetylcholine (M1 M2 M3 M4 M5) Dopamine (D1 D2 D3 D4 D5) Histamine (H1 H2 H3 H4) Melatonin (1A 1B 1C) TAAR (1 2 3 5 6 8 9)

Metabolites and
signaling molecules

Eicosanoid	CysLT (1 2) LTB4 (1 2) FPRL1 OXE Prostaglandin (DP (1 2), EP (1 2 3 4), FP) Prostacyclin Thromboxane

Other	Bile acid Cannabinoid (CB1 CB2, GPR (18 55 119)) EBI2 Estrogen Free fatty acid (1 2 3 4) Lactate Lysophosphatidic acid (1 2 3 4 5 6) Lysophospholipid (1 2 3 4 5 6 7 8) Niacin (1 2) Oxoglutarate PAF Sphingosine-1-phosphate (1 2 3 4 5) Succinate

Peptide

Neuropeptide	B/W (1 2) FF (1 2) S Y (1 2 4 5) Neuromedin (B U (1 2)) Neurotensin (1 2)

Other	Anaphylatoxin (C3a C5a) Angiotensin (1 2) Apelin Bombesin (BRS3 GRPR NMBR) Bradykinin (B1 B2) Chemokine Cholecystokinin (A B) Endothelin (A B) Formyl peptide (1 2 3) FSH Galanin (1 2 3) GHB receptor Gonadotropin-releasing hormone (1 2) Ghrelin Kisspeptin Luteinizing hormone/choriogonadotropin MAS (1 1L D E F G X1 X2 X3 X4) Melanocortin (1 2 3 4 5) MCHR (1 2) Motilin Opioid (Delta Kappa Mu Nociceptin & Zeta, but not Sigma) Orexin (1 2) Oxytocin Prokineticin (1 2) Prolactin-releasing peptide Relaxin (1 2 3 4) Somatostatin (1 2 3 4 5) Tachykinin (1 2 3) Thyrotropin Thyrotropin-releasing hormone Urotensin-II Vasopressin (1A 1B 2)

Miscellaneous

Orphan	GPR (1 3 4 6 12 15 17 18 19 20 21 22 23 25 26 27 31 32 33 34 35 37 39 42 44 45 50 52 55 61 62 63 65 68 75 77 78 81 82 83 84 85 87 88 92 101 103 109A 109B 119 120 132 135 137B 139 141 142 146 148 149 150 151 152 153 160 161 162 171 173 174 176 177 182 183)

Other	Adrenomedullin Olfactory Opsin (3 4 5 1LW 1MW 1SW RGR RRH) Protease-activated (1 2 3 4) SREB (1 2 3)

Class B: Secretin like

Orphan	GPR (56 64 97 98 110 111 112 113 114 115 116 123 124 125 126 128 133 143 144 155 157)

Other	Brain-specific angiogenesis inhibitor (1 2 3) Cadherin (1 2 3) Calcitonin CALCRL CD97 Corticotropin-releasing hormone (1 2) EMR (1 2 3) Glucagon (GR GIPR GLP1R GLP2R) Growth hormone releasing hormone PACAPR1 GPR Latrophilin (1 2 3 ELTD1) Methuselah-like proteins Parathyroid hormone (1 2) Secretin Vasoactive intestinal peptide (1 2)

Class C: Metabotropic
glutamate / pheromone

Taste	TAS1R (1 2 3) TAS2R (1 3 4 5 7 8 9 10 13 14 16 19 20 30 31 38 39 40 41 42 43 45 46 50 60)

Other	Calcium-sensing receptor GABA B (1 2) Glutamate receptor (Metabotropic glutamate (1 2 3 4 5 6 7 8)) GPRC6A GPR (156 158 179) RAIG (1 2 3 4)

Class F:
Frizzled / Smoothened

Frizzled	Frizzled (1 2 3 4 5 6 7 8 9 10)

Smoothened	Smoothened

Neuropeptidergics

Cholecystokinin

CCK_A	Agonists: Cholecystokinin CCK-4 Antagonists: Asperlicin Proglumide Lorglumide Devazepide Dexloxiglumide

CCK_B	Agonists: Cholecystokinin CCK-4 Gastrin Antagonists: Proglumide CI-988

CRH

CRF₁	Agonists: Corticotropin releasing hormone Antagonists: Antalarmin CP-154,526 Pexacerfont

CRF₂	Agonists: Corticotropin releasing hormone

Galanin

GAL₁	Agonists: Galanin Galanin-like peptide Galmic Galnon

GAL₂	Agonists: Galanin Galanin-like peptide Galmic Galnon

GAL₃	Agonists: Galanin Galmic Galnon

Ghrelin

GnRH

MCH

MCH₁	Agonists: Melanin concentrating hormone Antagonists: ATC-0175 GW-803,430 NGD-4715 SNAP-7941 SNAP-94847

MCH₂	Agonists: Melanin concentrating hormone

Melanocortin

MC₁	Agonists: alpha-MSH Afamelanotide BMS-470,539 Bremelanotide Melanotan II Antagonists: Agouti signalling peptide

MC₂	Agonists: ACTH Cosyntropin Tetracosactide

MC₃	Agonists: alpha-MSH Bremelanotide Melanotan II

MC₄	Agonists: alpha-MSH Bremelanotide Melanotan II PF-00446687 THIQ Antagonists: Agouti-related peptide

MC₅	Agonists: alpha-MSH Melanotan II

Neuropeptide S

Agonists: Neuropeptide S
Antagonists: SHA-68

Neuropeptide Y

Y₁	Agonists: Neuropeptide Y Peptide YY Antagonists: BIBP-3226

Y₂	Agonists: Neuropeptide Y Peptide YY Antagonists: BIIE-0246

Y₄	Agonists: Neuropeptide Y Pancreatic polypeptide Peptide YY Antagonists: UR-AK49

Y₅	Agonists: Neuropeptide Y Peptide YY Antagonists: Lu AA-33810

Neurotensin

NTS₁	Agonists: Neurotensin Neuromedin N Antagonists: SR-48692 SR-142,948

NTS₂	Agonists: Neurotensin Antagonists: Levocabastine SR-142,948

Orexin

OX₁	Agonists: Orexin-A Antagonists: Almorexant SB-334,867 SB-408,124 SB-649,868 Suvorexant

OX₂	Agonists: Orexin-A Antagonists: Almorexant SB-649,868 Suvorexant TCS-OX2-29

Oxytocin

Agonists: Carbetocin
Demoxytocin
Oxytocin
WAY-267,464
Antagonists: Atosiban
Epelsiban
L-371,257
L-368,899
Retosiban

Tachykinin

NK₁	Agonists: Substance P Antagonists: Aprepitant Befetupitant Casopitant CI-1021 CP-96,345 CP-99,994 CP-122,721 Dapitant Ezlopitant FK-888 Fosaprepitant GR-203,040 GW-597,599 HSP-117 L-733,060 L-741,671 L-743,310 L-758,298 Lanepitant LY-306,740 Maropitant Netupitant NKP-608 Nolpitantium Orvepitant RP-67,580 SDZ NKT 343 Vestipitant Vofopitant

NK₂	Agonists: Neurokinin A Antagonists: GR-159,897 Ibodutant Saredutant

NK₃	Agonists: Neurokinin B Antagonists: Osanetant Talnetant

Vasopressin

V_1A	Agonists: Desmopressin Felypressin Ornipressin Terlipressin Vasopressin Antagonists: Conivaptan Demeclocycline Relcovaptan

V_1B	Agonists: Felypressin Ornipressin Terlipressin Vasopressin Antagonists: Demeclocycline Nelivaptan

V₂	Agonists: Desmopressin Ornipressin Vasopressin Antagonists: Conivaptan Demeclocycline Lixivaptan Mozavaptan Satavaptan Tolvaptan

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Tachykinin receptor 2