MsrB1, ATMSRB1, METHIONINE SULFOXIDE REDUCTASE B 1
Background:
Methionine sulfoxide reductase B1 (MSRB1) catalytically reduces the R-enantiomer of MetSO. The other role is in the tolerance to oxidative damage. In Arabidopsis, there are two chloroplastic MsrB proteins, MsrB1 (AT1G53670) and MsrB2 (AT4G25330).
Plastid terminal oxidase (PTOX) is a plastoquinol oxidase in thylakoid membranes. It acts early in chloroplast biogenesis as a component of a redox chain responsible for phytoene desaturation.
Two types of small GTP-binding proteins, ADP-ribosylation factor (Arf) and secretion-associated and Ras-related (Sar), are major regulators of vesicle biogenesis in intracellular traffic and are founding members of a growing family that also includes Arf-relatedproteins (Arp) and Arf-like (Arl) proteins. Sar1 functions as a molecular switch to control the assembly of protein coats (COPII) that direct vesicle budding from ER.
CPFTSY is a homolog of the α-subunit of mammalian signal recognition particle (SRP) receptor, and is essential for protein translocation and vegetative cell growth.