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The molecular topography of phytochrome: Chromophore and apoprotein

โœ Scribed by Pill-Soon Song

Publisher
Elsevier Science
Year
1988
Tongue
English
Weight
991 KB
Volume
2
Category
Article
ISSN
1011-1344

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โœฆ Synopsis

Phytochrome serves as the photochromic receptor for a number of morphogenic and developmental responses to red light in higher plants. The photoreversible phototransformation of 124 kDa oat phytochrome involves several structural changes in the chromophore and the apoprotein, including a configurational/conformational isomerization and secondary/tertiary structural changes respectively. For example, there appears to be a specific interaction between the chromophore and the amino terminus segment in the Pfr form of phytochrome, which results in a photoreversible peptide folding of the amino terminus peptide chain. Other structural changes also accompany the phototransformation, as has been probed by peptide mapping, phosphorylation, and monoclonal antibodies.

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