NCBI Accession #
NP_001031534.1
NCBI GenBank Nucleotide #
NM_001036457.3
NCBI Official Full Name
protein phosphatase 5.2
NCBI Official Symbol
PP5.2
NCBI Official Synonym Symbols
Arabidopsis thaliana protein phosphatase 5; AtPP5; F7D19.19; F7D19_19; PAPP5; Phytochrome-Associated Protein Phosphatase 5; PP5; PROTEIN PHOSPHATASE 5; protein phosphatase 5.2
NCBI Protein Information
protein phosphatase 5.2
NCBI Summary
Encodes a phytochrome-specific type 5 serine/threonine protein phosphatase. It dephosphorylates active Pfr-phytochromes. Controls light signal flux by enhancing phytochrome stability and affinity for a signal transducer. The gene is alternately spliced. This variant is an integral membrane protein localized to the ER and nuclear envelope. Belongs to one of the 36 carboxylate clamp (CC)-tetratricopeptide repeat (TPR) proteins (Prasad 2010, Pubmed ID: 20856808) with potential to interact with Hsp90/Hsp70 as co-chaperones. It also regulates tetrapyrrole biosynthesis through the accumulation of Mg-ProtoIX and acts as a negative regulator of photosynthesis associated nuclear gene expression during chloroplast biogenesis and development.
UniProt Synonym Gene Names
PP5
UniProt Protein Name
Serine/threonine-protein phosphatase 5
UniProt Primary Accession #
Q84XU2
UniProt Secondary Accession #
Q56X87; Q8RXU0; Q8W581; Q9SJH5
UniProt Related Accession #
Q84XU2
UniProt Comments
Isoform 2 dephosphorylates phosphorylated phytochromes, with a preference toward Pfr forms, and enhances phytochrome-mediated photoresponses, probably by enhancing their stability and their binding affinity for light signal transducers such as NDPK2. Can use para-nitrophenylphosphate (pNPP) as substrate.