Protein
Peptide chain release factor PrfB3, chloroplastic
Organism
Arabidopsis thaliana
Function
Involved in the light- and stress-dependent regulation of stability of 3' processed petB transcripts, thus regulating cytochrome b6 accumulation, a rate-limiting step in photosynthetic electron transport. May be recruited to specifically protect petB transcripts against 3'-5' exonucleolytic attack by masking the 3' ends. Does not function as release factor.
Similarity
Belongs to the prokaryotic/mitochondrial release factor family.
Sequence
MAAKIIGGCCSWRRFYRKRTSSRFLIFSVRASSSMDDMDTVYKQLGLFSLKKKIKDVVLKAEMFAPDALELEEEQWIKQEETMRYFDLWDDPAKSDEILLKLADRAKAVDSLKDLKYKAEEAKLIIQLGEMDAIDYSLFEQAYDSSLDVSRSLHHYEMSKLLRDQYDAEGACMIIKSGSPGAKSQIWTEQVVSMYIKWAERLGQNARVAEKCSLLSNKSGVSSATIEFEFEFAYGYLLGERGVHRLIISSTSNEECSATVDIIPLFLRASPDFEVKEGDLIVSYPAKEDHKIAENMVCIHHIPSGVTLQSSGERNRFANRIKALNRLKAKLLVIAKEQKVSDVNKIDSKNILEPREETRSYVSKGHKMVVDRKTGLEILDLKSVLDGNIGPLLGAHISMRRSIDAI