Protein
ATP-dependent zinc metalloprotease FtsH 2
Organism
Synechocystis sp. (strain PCC 6803 / Kazusa)
Function
Plays a role in the selective replacement of photosystem II (PSII) protein D1 in the PSII repair cycle following visible-light and UV-B induced damage. If damaged D1 is not removed then new D1 cannot be inserted to restore the PSII reaction center. Seems to also degrade damaged and/or unassembled PSII proteins D2 and PsbB (CP47). May recognize D1 via its first 20 amino acids, as deletion of these prevents the PSII repair cycle. Also seems to degrade cytoplasmic GGPS, glucosylglycerol-phosphate synthase.
Similarity
In the C-terminal section; belongs to the peptidase M41 family.
Sequence
MKFSWRTALLWSLPLLVVGFFFWQGSFGGADANLGSNTANTRMTYGRFLEYVDAGRITSVDLYENGRTAIVQVSDPEVDRTLRSRVDLPTNAPELIARLRDSNIRLDSHPVRNNGMVWGFVGNLIFPVLLIASLFFLFRRSSNMPGGPGQAMNFGKSKARFQMDAKTGVMFDDVAGIDEAKEELQEVVTFLKQPERFTAVGAKIPKGVLLVGPPGTGKTLLAKAIAGEAGVPFFSISGSEFVEMFVGVGASRVRDLFKKAKENAPCLIFIDEIDAVGRQRGAGIGGGNDEREQTLNQLLTEMDGFEGNTGIIIIAATNRPDVLDSALMRPGRFDRQVMVDAPDYSGRKEILEVHARNKKLAPEVSIDSIARRTPGFSGADLANLLNEAAILTARRRKSAITLLEIDDAVDRVVAGMEGTPLVDSKSKRLIAYHEVGHAIVGTLLKDHDPVQKVTLIPRGQAQGLTWFTPNEEQGLTTKAQLMARIAGAMGGRAAEEEVFGDDEVTTGAGGDLQQVTEMARQMVTRFGMSNLGPISLESSGGEVFLGGGLMNRSEYSEEVATRIDAQVRQLAEQGHQMARKIVQEQREVVDRLVDLLIEKETIDGEEFRQIVAEYAEVPVKEQLIPQL