Kinetic analysis of demetalation of bacteriochlorophyll  c  and  e  homologs purified from green sulfur photosynthetic bacteria | Zendy

Saga Yoshitaka | Zendy; Hirai Yuki | Zendy; Tamiaki Hitoshi | Zendy

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Kinetic analysis of demetalation of bacteriochlorophyll c and e homologs purified from green sulfur photosynthetic bacteria

Author(s) -

Saga Yoshitaka,

Hirai Yuki,

Tamiaki Hitoshi

Publication year - 2007

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/j.febslet.2007.03.079

Subject(s) - bacteriochlorophyll , kinetics , chlorin , chemistry , sulfur , substituent , green sulfur bacteria , chlorosome , photosynthesis , photochemistry , methyl group , bacteria , stereochemistry , biochemistry , organic chemistry , biology , photosensitizer , group (periodic table) , physics , quantum mechanics , genetics

Substituent‐dependent demetalation kinetics of natural bacteriochlorophyll (BChl) c and e homologs purified from two green sulfur photosynthetic bacteria was first studied. Separated BChl e homologs, which possessed a formyl group at the 7‐position of their chlorin macrocycles, exhibited a significantly slow removal of central magnesium to free‐base bacteriopheophytins in acidic aqueous acetone compared with the corresponding BChl c homologs, which possessed a methyl group at the 7‐position. Additional methyl groups at the 8 2 ‐position of both BChl c and e molecules had little effect on the demetalation kinetics.

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