TY - JOUR
T1 - A novel 3.5 kDa protein component of cyanobacterial photosystem I complexes
AU - Ikeuchi, Masahiko
AU - Sonoike, Kintake
AU - Koike, Hiroyuki
AU - Pakrasi, Himadri B.
AU - Inoue, Yorinao
N1 - Funding Information:
The authors thank Drs. D.A. Bryant and V.L. Stirewalt (Pennsylvania State University, U.S.A.) for kindly providing their unpublished sequence data from Cyanophora paradoxa. This work was supported by a Grant on Photosynthetic Sciences from the Science and Technology Agency (to RIKEN) and a Grant-in-Aid (no. 03454013) from the Ministry of Education, Science and Culture of Japan (to M.I.). H.B.P.'s visit to RIKEN was supported by the U.S.-Japan Cooperation Program on Photoconver-sion and Photosynthesis.
PY - 1992/12
Y1 - 1992/12
N2 - A novel protein component of 3.5 kDa was detected in photosystem I complexes prepared from several cyanobacteria, viz. Synechococcus vulcanus, Synechococcus elongotus BP-1, Synechococcus sp. FCC 7002 and Synechocystis sp. FCC 6803. The complete amino acid sequence of this component was determined by direct protein sequencing. The sequences of the 3.5 kDa proteins from these four organisms were highly homologous to each other, featuring a hydrophobic domain in the middle. The cyanobacterial consensus sequence exhibits significant homology to the presumed product of ORF32 in the chloroplast DNA of liverwort (Marchantia polymorpha), but no homologous ORF is present in the chloroplast DNA of tobacco or rice. Since this protein appears to interact strongly with the PS I reaction center complex, it may play some role in the function and maintenance of the structure of PS I.
AB - A novel protein component of 3.5 kDa was detected in photosystem I complexes prepared from several cyanobacteria, viz. Synechococcus vulcanus, Synechococcus elongotus BP-1, Synechococcus sp. FCC 7002 and Synechocystis sp. FCC 6803. The complete amino acid sequence of this component was determined by direct protein sequencing. The sequences of the 3.5 kDa proteins from these four organisms were highly homologous to each other, featuring a hydrophobic domain in the middle. The cyanobacterial consensus sequence exhibits significant homology to the presumed product of ORF32 in the chloroplast DNA of liverwort (Marchantia polymorpha), but no homologous ORF is present in the chloroplast DNA of tobacco or rice. Since this protein appears to interact strongly with the PS I reaction center complex, it may play some role in the function and maintenance of the structure of PS I.
KW - Cyanobacteria
KW - Photosystem I
KW - PsaM
KW - Synecho coccus elongatus
KW - Synechococcus sp. PCC 7002
KW - Synechococcus vulcanus
KW - Synechocystis sp. PCC 6803
UR - http://www.scopus.com/inward/record.url?scp=0000863044&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:0000863044
SN - 0032-0781
VL - 33
SP - 1057
EP - 1063
JO - Plant and Cell Physiology
JF - Plant and Cell Physiology
IS - 8
ER -