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El-Shora, H., Hegazy, R. (2014). EFFECT OF AMINO ACIDS AND ALDEHYDES ON TYROSINASE ACTIVITY FROM MARROW. Journal of Plant Production, 5(2), 295-303. doi: 10.21608/jpp.2014.53642
H. M. El-Shora; Rania M. Hegazy. "EFFECT OF AMINO ACIDS AND ALDEHYDES ON TYROSINASE ACTIVITY FROM MARROW". Journal of Plant Production, 5, 2, 2014, 295-303. doi: 10.21608/jpp.2014.53642
El-Shora, H., Hegazy, R. (2014). 'EFFECT OF AMINO ACIDS AND ALDEHYDES ON TYROSINASE ACTIVITY FROM MARROW', Journal of Plant Production, 5(2), pp. 295-303. doi: 10.21608/jpp.2014.53642
El-Shora, H., Hegazy, R. EFFECT OF AMINO ACIDS AND ALDEHYDES ON TYROSINASE ACTIVITY FROM MARROW. Journal of Plant Production, 2014; 5(2): 295-303. doi: 10.21608/jpp.2014.53642

EFFECT OF AMINO ACIDS AND ALDEHYDES ON TYROSINASE ACTIVITY FROM MARROW

Article 9, Volume 5, Issue 2, February 2014, Page 295-303  XML PDF (643.38 K)
Document Type: Original Article
DOI: 10.21608/jpp.2014.53642
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Authors
H. M. El-Shora; Rania M. Hegazy
Botany Department, Faculty of Science, Mansoura University
Abstract
Tyrosinase (monophenol, O-diphenol: oxygen oxidoreductase, EC 1.14.18.1) is a copper-containing protein widely distributed in animals, plants and microorganisms. The enzyme was extracted from Cucurbitapepovar. cylindrica, (marrow, family:Cucurbitaceae). Proline, tryptophane, aspartic acid, cysteine, histidine, glycine, β-alanine and valinewere assayed for their effect on tyrosinase activity in different concentrations (2.5, 5, 7.5, 10 and 12.5 mM)in vitro. Histidine, aspartic acid, glycine and β-alanine induced tyrosinase activity gradually from 2.5 to 10 mM after which there was a decline in the enzyme activity. Tryptophane, valine and cysteine induced the activity up to 5 mM, while proline induced the activity from 2.5 to 7.5mM. Also, tyrosinase activity was assayed in presence of benzaldehyde, anisaldehyde (P-methoxybenzaldehyde) and acetaldehyde (0.1, 0.2, 0.3, 0.4 and 0.5 mM).It was found that the enzyme activity was inhibited by the three tested aldehydes.
Keywords
Tyrosinase; Tyrosine; Amino acids; Benzaldehyde; Anisaldehyde; Acetaldehyde
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