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Gene Review:

psaB - photosystem I P700 chlorophyll a...

Prochlorococcus marinus subsp. pastoris str. CCMP1986

van der Staay, G.W. et al.

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Disease relevance of psaB

Rapid evolutionary divergence of Photosystem I core subunits PsaA and PsaB in the marine prokaryote Prochlorococcus [1].
Divergence of these sequences from those of both freshwater cyanobacteria and higher plants was remarkably high, given the conserved nature of PsaA and PsaB proteins [1].
The nucleotide sequences of the genes coding for the subunits of the Photosystem I (PS I) core, PsaA and PsaB were determined for the marine prokaryotic oxyphototrophs Prochlorococcus sp. MED4 (CCMP1378), P. marinus SS120 (CCMP1375) and Synechococcus sp. WH7803 [1].

High impact information on psaB

Even in between the two Prochlorococcus strains, which correspond to two genetically different ecotypes with shifted growth irradiance optima, the sequence identity was only 80.2% for PsaA and 88.9% for PsaB [1].

References

Rapid evolutionary divergence of Photosystem I core subunits PsaA and PsaB in the marine prokaryote Prochlorococcus. van der Staay, G.W., Moon-van der Staay, S.Y., Garczarek, L., Partensky, F. Photosyn. Res. (2000) [Pubmed]

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