Probable Evolutionary History of Cryptomonad Algae

Douglas, Susan E.

doi:10.1007/978-1-4615-2818-0_14

Cited by 7 publications

(1 citation statement)

References 79 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The origin of GAPCp in cryptomonads is proposed to be proteobacterial, while that of their chloroplasts is evidently cyanobacterial, as indicated by sequences of several plastid-encoded genes, including 16S rRNAs and tufA (Delwiche et al 1995;Douglas 1993;Giovannoni et al 1993). In dinoflagellates RuBisCO is also reported to be proteobacterial in origin (Morse et al 1995;Rowan et al 1996;Watson and Tabita 1997), while the intrinsic peridinin-chlorophyll binding protein (iPCP) is of cyanobacterial origin [part of a larger gene family encompassing the fucoxanthin-chlorophyll proteins of the chromophytes and the chlorophyll a/b-binding proteins of the land plants (Durnford et al 1996)].…”

Section: Resultsmentioning

confidence: 99%

The Phylogeny of Glyceraldehyde-3-Phosphate Dehydrogenase Indicates Lateral Gene Transfer from Cryptomonads to Dinoflagellates

1998

View full text Add to dashboard Cite

Sequence analysis of two nuclear-encoded glyceraldehyde-3-phosphate dehydrogenase (GAPDH) genes isolated from the dinoflagellate Gonyaulax polyedra distinguishes them as cytosolic and chloroplastic forms of the enzyme. Distance analysis of the cytosolic sequence shows the Gonyaulax gene branching early within the cytosolic clade, consistent with other analyses. However, the plastid sequence forms a monophyletic group with the plastid isoforms of cryptomonads, within an otherwise cytosolic clade, distinct from all other plastid GAPDHs. This is attributed to lateral gene transfer from an ancestral cryptomonad to a dinoflagellate, providing the first example of genetic exchange accompanying symbiotic associations between the two, which are common in present day cells.

show abstract