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Go to the GPCR, ligand, or experimental data tables.
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GPCR

Name	Alpha-1B adrenergic receptor
Species	Rattus norvegicus (Rat)
Gene	Adra1b
Synonym	adrenergic receptor alpha 1B-adrenoceptor alpha 1B-adrenoreceptor adrenergic alpha 1B receptor Alpha-1B adrenoceptor Alpha-1B adrenoreceptor alpha1B-adrenergic receptor alpha1B-adrenoceptor [ Show all ]
Disease	N/A for non-human GPCRs
Length	515
Amino acid sequence	MNPDLDTGHNTSAPAHWGELKDDNFTGPNQTSSNSTLPQLDVTRAISVGLVLGAFILFAIVGNILVILSVACNRHLRTPTNYFIVNLAIADLLLSFTVLPFSATLEVLGYWVLGRIFCDIWAAVDVLCCTASILSLCAISIDRYIGVRYSLQYPTLVTRRKAILALLSVWVLSTVISIGPLLGWKEPAPNDDKECGVTEEPFYALFSSLGSFYIPLAVILVMYCRVYIVAKRTTKNLEAGVMKEMSNSKELTLRIHSKNFHEDTLSSTKAKGHNPRSSIAVKLFKFSREKKAAKTLGIVVGMFILCWLPFFIALPLGSLFSTLKPPDAVFKVVFWLGYFNSCLNPIIYPCSSKEFKRAFMRILGCQCRGGRRRRRRRRLGACAYTYRPWTRGGSLERSQSRKDSLDDSGSCMSGTQRTLPSASPSPGYLGRGTQPPVELCAFPEWKPGALLSLPEPPGRRGRLDSGPLFTFKLLGDPESPGTEGDTSNGGCDTTTDLANGQPGFKSNMPLAPGHF
UniProt	P15823
Protein Data Bank	N/A
GPCR-HGmod model	N/A
3D structure model	No available structures or models
BioLiP	N/A
Therapeutic Target Database	N/A
ChEMBL	CHEMBL315
IUPHAR	23
DrugBank	N/A

Ligand

Name	prazosin
Molecular formula	C19H21N5O4
IUPAC name	[4-(4-amino-6,7-dimethoxyquinazolin-2-yl)piperazin-1-yl]-(furan-2-yl)methanone
Molecular weight	383.408
Hydrogen bond acceptor	8
Hydrogen bond donor	1
XlogP	2.0
Synonyms	SBI-0051487.P003 Spectrum4_000483 Tocris-0623 Z275127478 [4-(4-amino-6,7-dimethoxy-quinazolin-2-yl)piperazin-1-yl]-(2-furyl)methanone Prazosin [INN:BAN] Pressin KB-207710 2-[4-(furan-2-carbonyl)piperazin-1-yl]-6,7-dimethoxyquinazolin-4-amine KBio3_000731 6,7-dimethoxy-4-amino-2-[4-(2-furoyl)piperazin-1-yl]quinazoline L000666 AN-15618 NCGC00016740-01 Bio1_001343 NCGC00016740-09 BSPBio_000914 NCGC00016740-19 NCGC00024324-10 DB00457 Piperazine, 1-(4-amino-6,7-dimethoxy-2-quinazolinyl)-4-(2-furoyl)-(8CI) Furazosin (4-(4-Amino-6,7-dimethoxyquinazolin-2-yl)-piperazin-1-yl)(furan-2-yl)methanone HMS3403D17 1-(4-Amino-6,7-dimethoxy-2-quinazolinyl)4-(2-furoyl)piperazine SMR001550197 ST075549 UNII-XM03YJ541D [3H]-Minipress [4-(4-amino-6,7-dimethoxyquinazolin-2-yl)piperazin-1-yl]-furan-2-ylmethanone Prazosina [INN-Spanish] Prestwick2_000947 KBio2_001302 237P844 KBioGR_000376 AB00053528_20 MCULE-8104643269 BCBcMAP01_000227 NCGC00016740-04 BPBio1_001006 NCGC00016740-12 C07368 NCGC00024324-05 CS-2088 Oprea1_314778 DSSTox_GSID_49082 H961 1-(3-Amino-6,7-dimethoxy-2- quinazolinyl)-4-(2-furanyl-carbonyl)piperazine hydrochloride Hypovase (TN) 2-(4-(2-FUROYL)-1-PIPERAZINYL)-6,7-DIMETHOXY-4-QUINAZOLINAMINE SB17351 Spectrum2_001289 TL8001573 XM03YJ541D [3H]prazosin Prazosinum 2-[4-(2-Furoyl)piperazin-1-yl]-4-amino-6,7-dimethoxyquinazoline KBio2_005512 5-25-13-00365 (Beilstein Handbook Reference) KBioSS_001302 AF-0052 MLS006011888 Bio1_000365 NCGC00016740-07 BRD-K49111258-003-16-4 NCGC00016740-15 CAS-19237-84-4 NCGC00024324-08 D0WV3U Piperazine, 1-(4-amino-6,7-dimethoxy-2-quinazolinyl)-4-(2-furoyl)- EINECS 242-885-8 HMS1990D17 1-(4-Amino-6,7-dimethoxy-2-quinazolinyl)-4-(2-furanylcarbonyl)piperazine IENZQIKPVFGBNW-UHFFFAOYSA-N SCHEMBL26524 Spectrum5_001365 Tox21_113646 ZINC95616601 [4-(4-amino-6,7-dimethoxyquinazolin-2-yl)piperazin-1-yl](furan-2-yl)methanone PRAZOSIN, Prazosin Hydrochloride Prestwick0_000947 KBio1_000375 2-[4-(Furan-2-Ylcarbonyl)piperazin-1-Yl]-6,7-Dimethoxyquinazolin-4-Amine KBio3_000732 AB00053528 Lentopres AN-18022 NCGC00016740-02 Bio2_000358 NCGC00016740-10 BSPBio_001036 NCGC00024324-02 CHEMBL2 NCI60_002417 DivK1c_000375 Piperazine,1-(4-amino-6,7-dimethoxy-2-quinazolinyl)-4-(2-furanylcarbonyl)-(9CI) GTPL503 (4-(4-Amino-6,7-dimethoxyquinazolin-2-yl)piperazin-1-yl)(furan-2-yl)methanone HSDB 3298 1-(4-amino-6,7-dimethoxy-2-quinazolinyl-4-(2-furanylcarbonyl)) piperrazine SPBio_001297 ST24038261 Vasoflex (TN) [3H]-Pratsiol Prazosine Prestwick3_000947 2-(4-(2-Furoyl)piperazin-1-yl)-4-amino-6,7-dimethoxyquinazoline KBio2_002944 KBioGR_000965 AB00053528_21 Minipress BCP14556 NCGC00016740-05 BRD-K49111258-001-02-8 NCGC00016740-13 C19H21N5O4 NCGC00024324-06 CTK7A0338 Piperazine, 1-(4-amino-6,7-dimethoxy-2-quinazolinyl)-4-(2-furanylcarbonyl)- DSSTox_RID_83272 HMS1362D17 1-(3-Amino-6,7-dimethoxy-2-quinazolinyl)-4-(2-furanyl-carbonyl)piperazine hydrochloride IDI1_000375 SBB032268 Spectrum3_000551 TNP00312 XRA [4-(4-Amino-6,7-dimethoxy-2-quinazolinyl)-1-piperazinyl](2-furyl)methanone Prazosin (INN) Prazosinum [INN-Latin] 2-[4-(2-furoyl)piperazin-1-yl]-6,7-dimethoxyquinazolin-4-amine KBio2_006438 KS-00002WRN AKOS000310009 MolPort-000-891-036 Bio1_000854 NCGC00016740-08 BRN 0768345 NCGC00016740-18 CHEBI:8364 NCGC00024324-09 Piperazine, 1-(4-amino-6,7-dimethoxy-2-quinazolinyl)-4-(2-furoyl)- (8CI) FT-0630457 HMS2089G09 1-(4-Amino-6,7-dimethoxy-2-quinazolinyl)-4-(2-furoyl)piperazine Justac SMP1_000063 Spectrum_000822 Tox21_113646_1 [3H]-Furazosin [4-(4-amino-6,7-dimethoxyquinazolin-2-yl)piperazin-1-yl]-(furan-2-yl)methanone Prazosina Prestwick1_000947 KBio2_000376 2-{4-[(furan-2-yl)carbonyl]piperazin-1-yl}-6,7-dimethoxyquinazolin-4-amine KBio3_001721 AB00053528-19 LS-140002 BBL028799 NCGC00016740-03 Bio2_000838 NCGC00016740-11 BSPBio_002221 NCGC00024324-04 CP-12299 NINDS_000375 DSSTox_CID_29008 Prazocin GTPL5385 HY-B0193 19216-56-9 Quinazoline, 4-amino-6,7-dimethoxy-2-(4-(2-furoyl)piperazin-1-yl)- SPBio_003073 STK301545 W-107722 [3H]-Prazosin Prazosine [INN-French] 2-[4-(2-Furoyl)-1-piperazinyl]-6,7-dimethoxy-4-quinazolinamine # KBio2_003870 4-(4-Amino-6,7-dimethoxyquinazolin-2-yl)piperazinyl 2-furyl ketone KBioSS_000376 AC1L1J6T Minipress (TN) BDBM29568 NCGC00016740-06 BRD-K49111258-003-05-7 NCGC00016740-14 CAS-19216-56-9 NCGC00024324-07 D08411 Piperazine, 1-(4-amino-6,7-dimethoxy-2-quinazolinyl)-4-(2-furanylcarbonyl)- (9CI) DTXSID4049082 HMS1792D17 1-(4-Amino-6,7-dimethoxy-2-quinazolinyl)-4-(2-furanylcarbonyl) piperazine IDI1_002113 [ Show all ]
Inchi Key	IENZQIKPVFGBNW-UHFFFAOYSA-N
Inchi ID	InChI=1S/C19H21N5O4/c1-26-15-10-12-13(11-16(15)27-2)21-19(22-17(12)20)24-7-5-23(6-8-24)18(25)14-4-3-9-28-14/h3-4,9-11H,5-8H2,1-2H3,(H2,20,21,22)
PubChem CID	4893
ChEMBL	CHEMBL2
IUPHAR	503
BindingDB	29568
DrugBank	DB00457
Structure SDF download
Lipinski's druglikeness	This ligand satisfies Lipinski's rule of five.

Experimental Data

Parameter	Value	Reference	Database source
IC50	0.178 nM	DrugMatrix in vitro pharmacology data	ChEMBL
IC50	0.19 nM	PMID19788200	BindingDB
IC50	0.27 nM	PMID23403082	ChEMBL
IC50	0.851 nM	PMID21549456	BindingDB
IC50	0.8511 nM	PMID21549456	ChEMBL
Inhibition	11.0 %	PMID23403082	ChEMBL
Kd	0.977 nM	PMID15633998	BindingDB
Kd	0.9772 nM	PMID15633998	ChEMBL
Kd	1.02 nM	PMID9822553	BindingDB
Kd	1.023 nM	PMID9871765, PMID9822553	ChEMBL
Ki	0.099 nM	DrugMatrix in vitro pharmacology data	ChEMBL
Ki	0.1 nM	PMID16723224	BindingDB,ChEMBL
Ki	0.15 nM	PMID23403082, PMID10602703	BindingDB,ChEMBL
Ki	0.2 nM	PMID9548811	BindingDB,ChEMBL
Ki	0.55 nM	PMID21549456	BindingDB,ChEMBL
Ki	0.56 nM	PMID1706716	BindingDB
Ki	2.93 nM	PMID9572880	BindingDB,ChEMBL
pKb	8.74 -	PMID11462977	ChEMBL
pKB	9.06 -	PMID14584940	ChEMBL

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