Item type:Thesis, Open Access

Photolyase/Cryptochrom-Homologe aus Synechocystis sp. PCC 6803 und Arabidopsis thaliana: Funktion, Lokalisation und biochemische Eigenschaften

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Date

2003-07-23

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Philipps-Universität Marburg
DOI

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Abstract

Cryptochromes (CRY) are blue/UV-A photoreceptors related to the DNA-repair enzyme DNA-photolyase. So far, they have been found in plants, animals and humans. However, their evolutionary origin is unclear. Sequence comparisons indicated that cryptochromes may have arisen twice during evolution, the plant photoreceptors from the class I CPD DNA-photolyases, and the animal cryptochromes from (6-4) photolyases (Kobayashi et al., 2000). Here we show that the Synechocystis gene sll1629 encodes a cryptochrome type photoreceptor. Thus, cryptochromes already exist in cyanobacteria. Closely related to sll1629 is the Arabidopsis gene At5g24850. Its encoded protein carries a dual transit sequence and is targeted to chloroplasts and mitochondria. Thus, CRYs may have been transferred to plants from the photosynthetic endosymbiont. However, Arabidopsis CRY1 and CRY2 are only distantly related to sll1629 but more closely to sequences in ? -proteobacteria, which indicates that plants may have received the cryptochromes by a dual horizontal gene transfer.

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Dates
Created: 2003Issued: 2003-07-23Updated: 2011-08-10
DOI
https://doi.org/10.17192/z2003.0135
Faculty
Fachbereich Biologie
Publisher
Philipps-Universität Marburg
Language
ger
Data types
DoctoralThesis
Keywords
Synechocystisorganelle targetingphotoreceptor evolutionCryptochrome, ArabidopsisOrganellen-Targeting
DFG-subjects
SynechocystisDeoxyribodipyrimidin-PhotolyaseAckerschmalwandCryptochromEvolution
DDC-Numbers
570
License
https://rightsstatements.org/vocab/InC-NC/1.0/
URI
https://open.uni-marburg.de/handle/10.17192/z2003.0135
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Kleine, Tatjana (124865569): Photolyase/Cryptochrom-Homologe aus Synechocystis sp. PCC 6803 und Arabidopsis thaliana: Funktion, Lokalisation und biochemische Eigenschaften. : Philipps-Universität Marburg 2003-07-23. DOI: https://doi.org/10.17192/z2003.0135.

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This item has been published with the following license: In Copyright