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1b33

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{{STRUCTURE_1b33| PDB=1b33 | SCENE= }}
{{STRUCTURE_1b33| PDB=1b33 | SCENE= }}
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'''STRUCTURE OF LIGHT HARVESTING COMPLEX OF ALLOPHYCOCYANIN ALPHA AND BETA CHAINS/CORE-LINKER COMPLEX AP*LC7.8'''
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===STRUCTURE OF LIGHT HARVESTING COMPLEX OF ALLOPHYCOCYANIN ALPHA AND BETA CHAINS/CORE-LINKER COMPLEX AP*LC7.8===
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==Overview==
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An electrophoretically purified allophycocyanin-linker complex, AP. LC7.8, from phycobilisomes of Mastigocladus laminosus has been crystallized in the orthorhombic space group P212121. Cryocrystallographic x-ray measurements enabled the structural analysis of the complex at a resolution of 2.2 A. The asymmetric unit contains two side-to-side associated "trimeric" (alphabeta)3 allophycocyanin complexes comprising the linker polypeptide in a defined orientation inside the trimer. The linker representing a protein fold related to the prosegment of procarboxypeptidase A is in contact with only two of the three beta-subunits and directly interacts with the corresponding chromophores of these proteins. In addition to a modulation of the chromophores' spectral properties, the linker polypeptide attracts the alphabeta-subcomplexes, thereby bringing the beta-chromophores closer together. These results will enable interpretations of energy-transfer mechanisms within phycobiliproteins.
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{{ABSTRACT_PUBMED_9990029}}
==About this Structure==
==About this Structure==
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[[Category: Light-harvesting protein]]
[[Category: Light-harvesting protein]]
[[Category: Linker polypeptide]]
[[Category: Linker polypeptide]]
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Revision as of 15:07, 30 June 2008

Image:1b33.png

Template:STRUCTURE 1b33

STRUCTURE OF LIGHT HARVESTING COMPLEX OF ALLOPHYCOCYANIN ALPHA AND BETA CHAINS/CORE-LINKER COMPLEX AP*LC7.8

Template:ABSTRACT PUBMED 9990029

About this Structure

1B33 is a Protein complex structure of sequences from Mastigocladus laminosus. Full crystallographic information is available from OCA.

Reference

Structural analysis at 2.2 A of orthorhombic crystals presents the asymmetry of the allophycocyanin-linker complex, AP.LC7.8, from phycobilisomes of Mastigocladus laminosus., Reuter W, Wiegand G, Huber R, Than ME, Proc Natl Acad Sci U S A. 1999 Feb 16;96(4):1363-8. PMID:9990029

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