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Chlorophyll b inhibits the formation of photosystem I trimer in Synechocystis sp. PCC6803
Author(s) -
Satoh Soichirou,
Tanaka Ayumi
Publication year - 2002
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/s0014-5793(02)03320-3
Subject(s) - p700 , photosystem i , chlorophyll , chlorophyll a , light harvesting complexes of green plants , photosystem ii , trimer , chlorophyll b , chlorophyll c , chemistry , synechocystis , chloroplast , chlorophyll fluorescence , photochemistry , photosynthesis , biochemistry , mutant , organic chemistry , dimer , gene
Chlorophyllide a oxygenase (CAO) catalyzes two‐step oxygenation reactions and converts chlorophyllide a to chlorophyllide b . When CAO was introduced into the Synechocystis sp. PCC6803 genome, chlorophyll b was synthesized and incorporated into P700–chlorophyll a –protein complexes. Curve analysis of photosystem I particles showed that Ca687 was decreased with a concomitant increase in Cb652 suggesting that chlorophyll b was incorporated into Ca687‐binding sites. When the level of chlorophyll b was high, Ca704, which is known as red chlorophyll and photosystem I trimers were decreased. Formation of photosystem I trimers is discussed in relation to red chlorophyll and chlorophyll b accumulation.