Leukotriene receptor

The leukotriene (LT) receptors are G protein-coupled receptors that bind and are activated by the leukotrienes. They include the following proteins:

Leukotriene B4 receptors (BLTRs) - bind to and are activated by LTB4:
- BLT₁ (Leukotriene B₄ receptor 1) - LTB4R
- BLT₂ (Leukotriene B₄ receptor 2) - LTB4R2
Cysteinyl leukotriene receptors (CysLTRs) - bind to and are activated by LTC4, LTD4, and LTE4:
- CysLT₁ (Cysteinyl leukotriene receptor 1) - CYSLTR1
- CysLT₂ (Cysteinyl leukotriene receptor 2) - CYSLTR2

The recently elucidated CysLT_E, represented by GPR99/OXGR1, may constitute a third CysLTR.^[1]

References

↑ Kanaoka Y, Maekawa A, Austen KF (2013). "Identification of GPR99 protein as a potential third cysteinyl leukotriene receptor with a preference for leukotriene E4 ligand". J. Biol. Chem. 288 (16): 10967–72. doi:10.1074/jbc.C113.453704. PMC 3630866. PMID 23504326.

External links

IUPHAR GPCR Database - Leukotriene receptors
Leukotriene Receptors at the US National Library of Medicine Medical Subject Headings (MeSH)

Membrane proteins, receptors: cell surface receptors

G protein-coupled receptor

Class A	Eicosanoid receptor (Prostaglandin receptor) Protease-activated receptor Neurotransmitter receptor Purinergic receptor Biogenic amine receptor Olfactory receptor

Class B	Secretin receptor

Class C	Metabotropic glutamate receptor

Class D	Pheromone receptor

Class E	cAMP receptor

Class F	Frizzled/smoothened

Ligand-gated ion channel

Purinergic receptor

Enzyme-linked receptor

Other/ungrouped

Cell surface receptor: G protein-coupled receptors

Class A: Rhodopsin like

Neurotransmitter

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

Adhesion	ADGRG (1 2 3 4 5 6 7)

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

Leukotriene signaling

Receptor
(ligands)

BLT

BLT₁	Agonists: 12-HETE 20-Hydroxy-LTB₄ Leukotriene B₄ LY-255283 Antagonists: 20-Carboxy-LTB₄ Amelubant CGS-23131 (LY-223982) CGS-25019C CP-105696 CP-195543 Etalocib LY-293111 Moxilubant ONO-4057 RG-14893 RP-69698 SB-209247 SC-53228 Ticolubant U-75302 ZK-158252

BLT₂	Agonists: 12-HETE 12-HHT 12-HpETE 15-HETE 15-HpETE 20-Hydroxy-LTB₄ Leukotriene B₄ Antagonists: CP-195543 LY-255283 ZK-158252

CysLT

CysLT₁	Agonists: Leukotriene C₄ Leukotriene D₄ Leukotriene E₄ Antagonists: Ablukast BAYu9773 BAYu9916 BAYx7195 Cinalukast FPL-55712 ICI-198615 Iralukast LY-170680 Masilukast MK-571 Montelukast ONO-1078 Pobilukast Pranlukast Ritolukast SKF-104353 SR-2640 Sulukast Tipelukast Tomelukast Verlukast Zafirlukast ZD-3523

CysLT₂	Agonists: Leukotriene C₄ Leukotriene D₄ Leukotriene E₄ Antagonists: BAYu9773 BAYu9916

CysLT_E	Agonists: Leukotriene E₄

Enzyme
(inhibitors)

5-Lipoxygenase	2-TEDC Baicalein BW-A4C BW-B70C Caffeic acid CDC CJ-13610 Curcumin Hyperforin Hypericum perforatum (St. John's Wort) Meclofenamic acid (meclofenamate) Minocycline N-Stearoyldopamine Timegadine Zileuton FLAP inhibitors: AM-103 AM-679 BAYx1005 MK-591 MK-886

12-Lipoxygenase	2-TEDC 3-Methoxytropolone Baicalein CDC

15-Lipoxygenase	2-TEDC CDC Luteolin PD-146176

LTA₄ hydrolase	Captopril DG-051 Fosinoprilat JNJ-26993135 SA-6541 SC-57461A Ubenimex (bestatin)

LTB₄ ω-hydroxylase	17-Octadecynoic acid

LTC₄ synthase	Azelastine MK-886

LTC₄ hydrolase	Acivicin Serine-borate complex

LTD₄ hydrolase	Cilastatin Ubenimex (bestatin)

Others

See also: Prostanoids

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