Structural highlights
Function
[DEGP1_ARATH] Serine protease that is required at high temperature. May be involved in the degradation of damaged proteins. In vivo, can degrade beta-casein.
Publication Abstract from PubMed
Deg1 is a chloroplastic protease involved in maintaining the photosynthetic machinery. Structural and biochemical analyses reveal that the inactive Deg1 monomer is transformed into the proteolytically active hexamer at acidic pH. The change in pH is sensed by His244, which upon protonation, repositions a specific helix to trigger oligomerization. This system ensures selective activation of Deg1 during daylight, when acidification of the thylakoid lumen occurs and photosynthetic proteins are damaged.
Structural adaptation of the plant protease Deg1 to repair photosystem II during light exposure.,Kley J, Schmidt B, Boyanov B, Stolt-Bergner PC, Kirk R, Ehrmann M, Knopf RR, Naveh L, Adam Z, Clausen T Nat Struct Mol Biol. 2011 Jun;18(6):728-31. Epub 2011 May 1. PMID:21532594[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Kley J, Schmidt B, Boyanov B, Stolt-Bergner PC, Kirk R, Ehrmann M, Knopf RR, Naveh L, Adam Z, Clausen T. Structural adaptation of the plant protease Deg1 to repair photosystem II during light exposure. Nat Struct Mol Biol. 2011 Jun;18(6):728-31. Epub 2011 May 1. PMID:21532594 doi:10.1038/nsmb.2055
