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Inhibition of a Protein Tyrosine Phosphatase Using Mesoporous Oxides

Kapoor, S and Girish, TS and Mandal, SS and Gopal, B and Bhattacharyya, AJ (2010) Inhibition of a Protein Tyrosine Phosphatase Using Mesoporous Oxides. In: Journal of Physical Chemistry B, 114 (9). pp. 3117-3121.

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Official URL: http://pubs.acs.org/doi/abs/10.1021/jp910166h


The feasibility of utilizing mesoporous matrices of alumina and silica for the inhibition of enzymatic activity is presented here. These studies were performed on a protein tyrosine phosphatase by the name chick retinal tyrosine phosphotase-2 (CRYP-2), a protein that is identical in sequence to the human glomerular epithelial protein-1 and involved in hepatic carcinoma. The inhibition of CRYP-2 is of tremendous therapeutic importance. Inhibition of catalytic activity was examined using the Sustained delivery of p-nitrocatechol sulfate (pNCS) from bare and amine functionalized mesoporous silica (MCM-48) and mesoporous alumina (Al2O3). Among the various mesoporous matrices employed, amine functionalized MCM-48 exhibited the best release of pNCS and also inhibition of CRYP-2. The maximum speed of reaction nu(max) (= 160 +/- 10 mu mol/mnt/mg) and inhibition constant K-i (=85.0 +/- 5.0 mu mol) estimated using a competitive inhibition model were Found to be very similar to inhibition activities of protein tyrosine phosphatases using other methods.

Item Type: Journal Article
Publication: Journal of Physical Chemistry B
Publisher: American Chemical Society.
Additional Information: Copyright of this article belongs to American Chemical Society.
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited: 23 Mar 2010 07:04
Last Modified: 19 Sep 2010 05:57
URI: http://eprints.iisc.ac.in/id/eprint/26397

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