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BioAssay: AID 305777

Activation of human recombinant carbonic anhydrase 5B by stopped-flow CO2 hydrase method

The mitochondrial isozymes of human carbonic anhydrase (hCA, EC 4.2.1.1), hCA VA and hCA VB, were investigated for activation with a series of amino acids and amines. D-His, L-DOPA, histamine, dopamine, and 4-(2-aminoethyl)morpholine were excellent hCA VA activators, with KAs in the range of 10-130 nM. Good hCA VB activating effects were identified for L-His, D-Phe, D-DOPA, L-Trp, L-Tyr, more ..
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 Tested Compounds
 Tested Compounds
All(17)
 
 
Active(17)
 
 
 Tested Substances
 Tested Substances
All(17)
 
 
Active(17)
 
 
AID: 305777
Data Source: ChEMBL (453803)
Depositor Category: Literature, Extracted
BioAssay Version:
Deposit Date: 2010-05-25
Modify Date: 2014-08-24

Data Table ( Complete ):           View Active Data    View All Data
Target
Sequence: RecName: Full=Carbonic anhydrase 5B, mitochondrial; AltName: Full=Carbonate dehydratase VB; AltName: Full=Carbonic anhydrase VB; Short=CA-VB; Flags: Precursor
Description ..   
Protein Family: alpha_CA
Comment ..   

Gene:CA5B     Related Protein 3D Structures     More BioActivity Data..
BioActive Compounds: 17
Description:
Title: Carbonic anhydrase activators: an activation study of the human mitochondrial isoforms VA and VB with amino acids and amines.

Abstract: The mitochondrial isozymes of human carbonic anhydrase (hCA, EC 4.2.1.1), hCA VA and hCA VB, were investigated for activation with a series of amino acids and amines. D-His, L-DOPA, histamine, dopamine, and 4-(2-aminoethyl)morpholine were excellent hCA VA activators, with KAs in the range of 10-130 nM. Good hCA VB activating effects were identified for L-His, D-Phe, D-DOPA, L-Trp, L-Tyr, serotonin, and 2-(2-aminoethyl)-pyridine, with KAs in the range of 44-110 nM. All these activators enhanced kcat, having no effect on KM, favoring thus the rate-determining step in the catalytic cycle, the proton transfer reactions between the active site and environment. The activation pattern of the two mitochondrial isoforms is very different from each other and as compared to those of the cytosolic isoforms hCA I and II.
(PMID: 17174092)
Comment
Compounds with activity <= 50uM or explicitly reported as active by ChEMBL are flagged as active in this PubChem assay presentation.
Categorized Comment - additional comments and annotations
From BioAssay Depositor:
Assay Type: Binding
Target Type: Target is a single protein chain
Assay Data Source: Scientific Literature
Protein Target Class: enzyme lyase
Result Definitions
TIDNameDescriptionHistogramTypeUnit
OutcomeThe BioAssay activity outcomeOutcome
1KA activity commentKA activity commentString
2KA standard flagKA standard flagInteger
3KA qualifierKA qualifierString
4KA published valueKA published valueFloatμM
5KA standard valueKA standard valueFloatnM

Data Table (Concise)
Data Table ( Complete ):     View Active Data    View All Data
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