[Bioinformatics studies on photosynthetic system genes in cyanobacteria and chloroplasts].
This study compared homology of base sequences in genes encoding photosynthetic system proteins of cyanobacteria (Synechocystics sp. PCC6803, Nostoc sp. PCC7120) with these of chloroplasts (from Marchantia Polymorpha, Nicotiana tobacum, Oryza sativ, Euglena gracilis, Pinus thunbergii, Zea mays, Odentella sinesis, Cyanophora paradoxa, Porphyra purpurea and Arabidopsis thaliana) by BLAST method. While the gene sequence of Synechocystics sp. PCC6803 was considered as the criterion (100%) the homology of others were compared with it. Among the genes for photosystem I, psaC homology was the highest (90.14%) and the lowest was psaJ (52.24%). The highest ones were psbD (83.71%) for photosystem II, atpB (79.58%) for ATP synthase and petB (81.66%) for cytochrome b6/f complex. The lowest ones were psbN (49.70%) for photosystem II, atpF (26.69%) for ATP synthase and petA (55.27%) for cytochrome b6/f complex. Also, this paper discussed why the homology of gene sequences was the highest or the lowest. No report has been published and this bioinformatics research may provide some evidences for the origin and evolution of chloroplasts.
Shi
Ding-Ji
DJ
College of Marine Sciences & Engineering, Tianjin University of Sciences & Technology, Tianjin 300450, China. cyanoshi@public.bta.net.cn
Zhang
Chao
C
Li
Shi-Ming
SM
Li
Ci-Shan
CS
Zhang
Peng-Peng
PP
Yang
Ming-Li
ML
D025222:Chloroplast Proton-Translocating ATPases / Q000235:genetics; D002736:Chloroplasts / Q000235:genetics* / Q000378:metabolism; D019295:Computational Biology; D000458:Cyanobacteria / Q000235:genetics* / Q000378:metabolism; D045346:Cytochrome b6f Complex / Q000235:genetics; D010788:Photosynthesis; D010940:Plant Proteins / Q000235:genetics
C104657:PetB protein, plant; D010940:Plant Proteins; D045346:Cytochrome b6f Complex; D025222:Chloroplast Proton-Translocating ATPases