NCBI Accession #
NP_195270.1
NCBI GenBank Nucleotide #
NM_119710.5
NCBI Official Full Name
ankyrin repeat-containing protein 2
NCBI Official Symbol
AKR2
NCBI Official Synonym Symbols
AFT; AKR2A; ankyrin repeat-containing protein 2; F15J1.20; F15J1_20
NCBI Protein Information
ankyrin repeat-containing protein 2
NCBI Summary
Involved in targeting of chloroplast outer membrane proteins to the chloroplast. Double mutants of AKR2A and the highly homologous AKR2B have yellow leaves, significantly reduced chloroplast proteins, and no thylakoid membranes.
UniProt Synonym Gene Names
AtAKR2
UniProt Protein Name
Ankyrin repeat domain-containing protein 2A
UniProt Primary Accession #
Q9SAR5
UniProt Secondary Accession #
O81128; Q9SVX0
UniProt Related Accession #
Q9SAR5
UniProt Comments
Exhibits chaperone activity toward chloroplast outer envelope membrane, mitochondrion outer membrane, endoplasmic reticulum membrane and peroxisomal proteins, by recruiting specific proteins containing a single transmembrane associated with an AKR2A-binding sequence (ABS) and subsequently binding glycolipids (e.g. monogalactosyldiacylglycerol (MGDG) and phosphatidylglycerol (PG)) present in the membrane of the target organelle (PubMed:18193034, PubMed:20215589, PubMed:25203210). Seems to be involved in the regulation of hydrogen peroxide levels during biotic and abiotic stresses by optimizing the ascorbate peroxidase 3 (APX3) hydrogen peroxide-degrading activity. This regulation might be monitored by GRF6. Cytosolic targeting factor for chloroplast outer membrane (COM) proteins that mediates sorting and targeting of nascent chloroplast outer envelope membrane (OEM) proteins to the chloroplast. Facilitates the targeting of OEP7 to chloroplasts (PubMed:18193034). Facilitates the targeting of APX3 to peroxisomes. Involved in cellular metabolism (e.g. peroxisome activity) and required for plant growth and development (PubMed:20215589).