1ztu

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[[Image:1ztu.gif|left|200px]]
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{{STRUCTURE_1ztu| PDB=1ztu | SCENE= }}
{{STRUCTURE_1ztu| PDB=1ztu | SCENE= }}
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'''Structure of the chromophore binding domain of bacterial phytochrome'''
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===Structure of the chromophore binding domain of bacterial phytochrome===
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==Overview==
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Phytochromes are red/far-red light photoreceptors that direct photosensory responses across the bacterial, fungal and plant kingdoms. These include photosynthetic potential and pigmentation in bacteria as well as chloroplast development and photomorphogenesis in plants. Phytochromes consist of an amino-terminal region that covalently binds a single bilin chromophore, followed by a carboxy-terminal dimerization domain that often transmits the light signal through a histidine kinase relay. Here we describe the three-dimensional structure of the chromophore-binding domain of Deinococcus radiodurans phytochrome assembled with its chromophore biliverdin in the Pr ground state. Our model, refined to 2.5 A resolution, reaffirms Cys 24 as the chromophore attachment site, locates key amino acids that form a solvent-shielded bilin-binding pocket, and reveals an unusually formed deep trefoil knot that stabilizes this region. The structure provides the first three-dimensional glimpse into the photochromic behaviour of these photoreceptors and helps to explain the evolution of higher plant phytochromes from prokaryotic precursors.
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The line below this paragraph, {{ABSTRACT_PUBMED_16292304}}, adds the Publication Abstract to the page
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(as it appears on PubMed at http://www.pubmed.gov), where 16292304 is the PubMed ID number.
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{{ABSTRACT_PUBMED_16292304}}
==About this Structure==
==About this Structure==
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[[Category: Pa]]
[[Category: Pa]]
[[Category: Phytochrome]]
[[Category: Phytochrome]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 18:04:12 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jul 28 17:41:22 2008''

Revision as of 14:41, 28 July 2008

Image:1ztu.png

Template:STRUCTURE 1ztu

Structure of the chromophore binding domain of bacterial phytochrome

Template:ABSTRACT PUBMED 16292304

About this Structure

1ZTU is a Single protein structure of sequence from Deinococcus radiodurans. Full crystallographic information is available from OCA.

Reference

A light-sensing knot revealed by the structure of the chromophore-binding domain of phytochrome., Wagner JR, Brunzelle JS, Forest KT, Vierstra RD, Nature. 2005 Nov 17;438(7066):325-31. PMID:16292304

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