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Related Experiment Video

Updated: Nov 5, 2025

Investigating Tissue- and Organ-specific Phytochrome Responses using FACS-assisted Cell-type Specific Expression Profiling in Arabidopsis thaliana

Investigating Tissue- and Organ-specific Phytochrome Responses using FACS-assisted Cell-type Specific Expression Profiling in Arabidopsis thaliana

Published on: May 29, 2010

Phytochromes in Agrobacterium fabrum.

Tilman Lamparter¹, Peng Xue¹, Afaf Elkurdi¹

¹Botanical Institute, Karlsruhe Institute of Technology KIT, Karlsruhe, Germany.

Frontiers in Plant Science

|May 17, 2021

Summary

This review covers Agrobacterium fabrum phytochromes (Agp1 and Agp2), key regulators of conjugation and gene transfer. Their known structures enable studying the light-induced signal transduction cascade and DNA transfer processes.

Keywords:

bacterial conjugation crystal structure evolution histidine kinase light regulation origin of plant phytochromes plant infection protein conformational changes

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Published on: July 22, 2017

Area of Science:

Microbiology
Molecular Biology
Biochemistry

Background:

Phytochromes are photoreceptors regulating various biological processes.
Agrobacterium fabrum possesses two phytochromes, Agp1 and Agp2, with known crystal structures.

Purpose of the Study:

To review the roles of Agp1 and Agp2 phytochromes in Agrobacterium fabrum.
To highlight the potential of the A. fabrum phytochrome system for studying signal transduction.

Main Methods:

Literature review focusing on Agp1 and Agp2 functions.
Analysis of known crystal structures of A. fabrum phytochromes.
Discussion of the phytochrome-mediated signal transduction pathway.

Main Results:

Agp1 and Agp2 regulate conjugation and gene transfer in A. fabrum.
The known structures facilitate detailed investigation of light-induced conformational changes.
The system allows tracking signal transduction from light perception to DNA transfer.

Conclusions:

The A. fabrum phytochrome system serves as a model for understanding light-regulated biological processes.
Elucidating the complete signal transduction cascade offers insights into bacterial gene transfer mechanisms.