PetG and PetN, but not PetL, are essential subunits of the cytochrome b6f complex from Synechocystis PCC 6803.
The cytochrome b(6)f complex consists of four large core subunits and an additional four low molecular weight subunits, the function of which is elusive thus far. Here we sought to determine whether small subunits PetG, PetL, and PetN are essential for a cyanobacterial cytochrome b(6)f complex. We found that only PetL is dispensable, whereas PetG and PetN appear to be essential. Possible roles of the small cytochrome b(6)f complex subunits are discussed, and observations from our study are compared with previous findings.
Schneider
Dirk
D
Institut für Biochemie und Molekularbiologie, Albert-Ludwigs-Universität Freiburg, Stefan-Meier-Strasse 19, 79104 Freiburg, Germany.
Volkmer
Thomas
T
Rögner
Matthias
M
D001426:Bacterial Proteins / Q000737:chemistry* / Q000378:metabolism; D002734:Chlorophyll / Q000096:biosynthesis; D045346:Cytochrome b6f Complex / Q000737:chemistry* / Q000378:metabolism; D017353:Gene Deletion; D017434:Protein Structure, Tertiary; D021122:Protein Subunits / Q000235:genetics / Q000502:physiology*; D046939:Synechocystis / Q000201:enzymology*
D001426:Bacterial Proteins; D021122:Protein Subunits; D002734:Chlorophyll; D045346:Cytochrome b6f Complex