Biosynthesis of proteins by the retina. Inactivation by near-ultraviolet light and the effects of tryptophan, epinephrine, and catalase.

Abstract:

:Postmitochondrial supernatant, cytosol, and microsomes were exposed to near-ultraviolet light and assayed for incorporation of (3H)leucine. The results indicate that near-ultraviolet light decreased the incorporation of radioactivity into the aminoacyl-tRNA fraction and into proteins. This effect depended on the wavelength of irradiation and the concentration of exposed protein. Tryptophan and epinephrine potentiated the effect of near-ultraviolet light, but catalase prevented this effect. Hydrogen peroxide decreased protein synthesis when it was added to unirradiated postmitochondrial supernatant. The results suggest that near-ultraviolet light would decrease protein synthesis by generating hydrogen peroxide from tryptophan and epinephrine.

authors

Matuk Y,Lou P,Parker JA

subject

Has Abstract

pub_date

1977-12-01 00:00:00

pages

1104-9

issue

12

eissn

0146-0404

issn

1552-5783

journal_volume

16

pub_type

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