Abstract:
:The LI818 gene from Chlamydomonas encodes a polypeptide that is related to the chlorophyll a/b-binding proteins (CAB) of higher plants and green algae. However, despite this relatedness, LI818 gene expression is not coordinated with that of cab genes and is regulated differently by light, suggesting a different role for LI818 polypeptide. We show here that, in contrast to CAB polypeptides, LI818 polypeptide is not tightly embedded into the thylakoid membranes and is localized in stroma-exposed regions. Moreover, during chloroplast development, LI818 polypeptide accumulates before CAB polypeptides. We also show that the LI818 polypeptide forms with certain chlorophyll a/c-binding proteins (CAC) from the haptophyte Isochrysis galbana and the diatom Cyclotella cryptica a natural group that is distinct from those constituted by CAB, CAC and the chlorophyll a/a-binding proteins (CAA). Such an association suggests a very ancient origin for this group of polypeptides, which predates the division of the early photosynthetic eukaryotes into green (chlorophyte), red (rhodophyte) and brown (chromophyte) algae. Possible roles for the LI818 polypeptide are discussed.
journal_name
Plant Mol Bioljournal_title
Plant molecular biologyauthors
Richard C,Ouellet H,Guertin Mdoi
10.1023/a:1006340308077subject
Has Abstractpub_date
2000-01-01 00:00:00pages
303-16issue
2eissn
0167-4412issn
1573-5028journal_volume
42pub_type
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journal_title:Plant molecular biology
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journal_title:Plant molecular biology
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journal_title:Plant molecular biology
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pub_type: 杂志文章
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journal_title:Plant molecular biology
pub_type: 杂志文章
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更新日期:2003-06-01 00:00:00
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pub_type: 杂志文章
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journal_title:Plant molecular biology
pub_type: 杂志文章
doi:10.1007/s11103-008-9383-8
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pub_type: 杂志文章
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journal_title:Plant molecular biology
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journal_title:Plant molecular biology
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更新日期:1995-12-01 00:00:00
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journal_title:Plant molecular biology
pub_type: 杂志文章
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pub_type: 杂志文章,评审
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更新日期:2002-03-01 00:00:00
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journal_title:Plant molecular biology
pub_type: 杂志文章
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更新日期:2006-09-01 00:00:00
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