Get 20M+ Full-Text Papers For Less Than $1.50/day. Start a 7-Day Trial for You or Your Team.

Learn More →

Human Blue‐light Photoreceptor hCRY2 Specifically Interacts with Protein Serine/Threonine Phosphatase 5 and Modulates Its Activity

Human Blue‐light Photoreceptor hCRY2 Specifically Interacts with Protein Serine/Threonine... Abstract— Photolyase/blue‐light photoreceptor family of proteins includes cyclobutane pyrimidine dimer photolyase, (6‐4) photolyase and blue‐light photoreceptors that were recently discovered in Arabidopsis thaliana, Sinapis alba and Chlamydomonas reinhardtii. Recently, we identified two human genes, hCRYl and hCRY2, belonging to this family. The proteins encoded by these genes have no DNA repair activity and therefore were hypothesized to function in human blue‐light response reactions. To identify downstream targets for these putative blue‐light photoreceptors we searched for interacting proteins by the yeast two‐hybrid method. We found that the tetratricopeptide repeat protein 1, Tpr1, and the protein serine/ threonine phosphatase 5 (PP5) that contains the TPR motif specifically interacted with hCRY2. The effect of the hCRY2‐PP5 interaction on the protein phosphatase activity was investigated. We found that hCRY2, but not the highly homologous (6‐4) photolyase, inhibits the phosphatase activity of PP5. This inhibition may be on the pathway of blue‐light signal transduction reaction in humans. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Photochemistry & Photobiology Wiley

Human Blue‐light Photoreceptor hCRY2 Specifically Interacts with Protein Serine/Threonine Phosphatase 5 and Modulates Its Activity

Photochemistry & Photobiology , Volume 66 (5) – Nov 1, 1997

Loading next page...
 
/lp/wiley/human-blue-light-photoreceptor-hcry2-specifically-interacts-with-kp1q8B3Ms0

References (31)

Publisher
Wiley
Copyright
"Copyright © 1997 Wiley Subscription Services, Inc., A Wiley Company"
ISSN
0031-8655
eISSN
1751-1097
DOI
10.1111/j.1751-1097.1997.tb03214.x
Publisher site
See Article on Publisher Site

Abstract

Abstract— Photolyase/blue‐light photoreceptor family of proteins includes cyclobutane pyrimidine dimer photolyase, (6‐4) photolyase and blue‐light photoreceptors that were recently discovered in Arabidopsis thaliana, Sinapis alba and Chlamydomonas reinhardtii. Recently, we identified two human genes, hCRYl and hCRY2, belonging to this family. The proteins encoded by these genes have no DNA repair activity and therefore were hypothesized to function in human blue‐light response reactions. To identify downstream targets for these putative blue‐light photoreceptors we searched for interacting proteins by the yeast two‐hybrid method. We found that the tetratricopeptide repeat protein 1, Tpr1, and the protein serine/ threonine phosphatase 5 (PP5) that contains the TPR motif specifically interacted with hCRY2. The effect of the hCRY2‐PP5 interaction on the protein phosphatase activity was investigated. We found that hCRY2, but not the highly homologous (6‐4) photolyase, inhibits the phosphatase activity of PP5. This inhibition may be on the pathway of blue‐light signal transduction reaction in humans.

Journal

Photochemistry & PhotobiologyWiley

Published: Nov 1, 1997

There are no references for this article.