Bookmark and Share
BioAssay: AID 537012

Ratio of compound Ki to angiotensin 4 Ki for human recombinant IRAP expressed in HEK293 cells

The insulin-regulated aminopeptidase (IRAP) localized in areas of the brain associated with memory and learning is emerging as a new promising therapeutic target for the treatment of memory dysfunctions. The angiotensin II metabolite angiotensin IV (Ang IV, Val(1)-Tyr(2)-Ile(3)-His(4)-Pro(5)-Phe(6)) binds with high affinity to IRAP and inhibits this aminopeptidase (K(i) = 62.4 nM). Furthermore, more ..
_
   
 Tested Compounds
 Tested Compounds
All(1)
 
 
Unspecified(1)
 
 
 Tested Substances
 Tested Substances
All(1)
 
 
Unspecified(1)
 
 
 Related BioAssays
 Related BioAssays
AID: 537012
Data Source: ChEMBL (684893)
Depositor Category: Literature, Extracted
BioAssay Version:
Deposit Date: 2011-09-18
Modify Date: 2014-05-25

Data Table ( Complete ):           All
Target
Sequence: RecName: Full=Leucyl-cystinyl aminopeptidase; Short=Cystinyl aminopeptidase; AltName: Full=Insulin-regulated membrane aminopeptidase; AltName: Full=Insulin-responsive aminopeptidase; Short=IRAP; AltName: Full=Oxytocinase; Short=OTase; AltName: Full=Placental leucine aminopeptidase; Short=P-LAP; Contains: RecName: Full=Leucyl-cystinyl aminopeptidase, pregnancy serum form
Description ..   
Protein Family: Peptidase M1 Aminopeptidase N family incudes tricorn interacting factor F3, Endoplasmic reticulum aminopeptidase 1 (ERAP1), Aminopeptidase Q (APQ)
Comment ..   

Gene:LNPEP     Related Protein 3D Structures     More BioActivity Data..
Tested Compound:
Description:
Title: Disulfide cyclized tripeptide analogues of angiotensin IV as potent and selective inhibitors of insulin-regulated aminopeptidase (IRAP).

Abstract: The insulin-regulated aminopeptidase (IRAP) localized in areas of the brain associated with memory and learning is emerging as a new promising therapeutic target for the treatment of memory dysfunctions. The angiotensin II metabolite angiotensin IV (Ang IV, Val(1)-Tyr(2)-Ile(3)-His(4)-Pro(5)-Phe(6)) binds with high affinity to IRAP and inhibits this aminopeptidase (K(i) = 62.4 nM). Furthermore, Ang IV has been demonstrated to enhance cognition in animal models and is believed to play an important role in cognitive processes. It is herein reported that displacement of the C-terminal tripeptide His(4)-Pro(5)-Phe(6) with a phenylacetic acid functionality combined with a constrained macrocyclic system in the N-terminal affords potent IRAP inhibitors that are less peptidic in character than the hexapeptide Ang IV. Configurational analysis of three pairs of diastereomeric Ang IV analogues was performed using a combination of solution NMR spectroscopic methods, Monte Carlo conformational searches, and NAMFIS calculations. The compounds encompassing l-amino acids only (4, 8, and 12) showed significantly higher bioactivity compared to their lld-epimers (5, 9, and 13). The best inhibitors in the series, compounds 8 and 12, incorporating a 13- and 14-membered disulfide ring system, respectively, and both with a beta(3)-homotyrosine residue (beta(3)hTyr) replacing Tyr(2), exhibit K(i) values of 3.3 and 5.2 nM, respectively.
(PMID: 21047126)
Categorized Comment
Assay Type: Binding

Assay Data Source: Scientific Literature

BAO: Assay Format: cell-based format

Assay Cell Type: HEK293

Target Type: Target is a single protein chain

Result Definitions
TIDNameDescriptionHistogramTypeUnit
OutcomeThe BioAssay activity outcomeOutcome
1Ratio Ki activity commentRatio Ki activity commentString
2Ratio Ki standard flagRatio Ki standard flagInteger
3Ratio Ki qualifierRatio Ki qualifierString
4Ratio Ki published valueRatio Ki published valueFloat
5Ratio Ki standard valueRatio Ki standard valueFloat

Data Table (Concise)
Classification
PageFrom: