NCBI Accession #
NP_565444.2
NCBI GenBank Nucleotide #
NM_127448.2
NCBI Official Full Name
LOV KELCH protein 2
NCBI Official Symbol
LKP2
NCBI Official Synonym Symbols
ADAGIO 2; ADO2; LOV KELCH protein 2
NCBI Protein Information
LOV KELCH protein 2
NCBI Summary
encodes a member of F-box proteins that includes two other proteins in Arabidopsis (ZTL and FKF1). These proteins contain a unique structure containing a PAS domain at their N-terminus, an F-box motif, and 6 kelch repeats at their C-terminus. Overexpression results in arrhythmic phenotypes for a number of circadian clock outputs in both constant light and constant darkness, long hypocotyls under multiple fluences of both red and blue light, and a loss of photoperiodic control of flowering time. Although this the expression of this gene itself is not regulated by circadian clock, it physically interacts with Dof transcription factors that are transcriptionally regulated by circadian rhythm. LKP2 interacts with Di19, CO/COL family proteins.
UniProt Synonym Gene Names
FKL1; LKP2; FBX2c; FKF1-like protein 1
UniProt Protein Name
Adagio protein 2
UniProt Synonym Protein Names
F-box only protein 2c; FBX2c; Flavin-binding kelch repeat F-box protein 1-like protein 1; FKF1-like protein 1; LOV kelch protein 2
UniProt Primary Accession #
Q8W420
UniProt Secondary Accession #
Q9C5S6; B5X4Z7
UniProt Related Accession #
Q8W420
UniProt Comments
Component of an E3 ubiquitin ligase complex that plays a central role in blue light-dependent circadian cycles. Acts as a blue light photoreceptor, due to the presence of FMN, that mediates light-regulated protein degradation of critical clock components by targeting them to the proteasome complex. The SCF(ADO2) E3 ubiquitin ligase complex is involved in the regulation of circadian clock-dependent processes including the transition to flowering time, hypocotyl elongation, cotyledons and leaf movement rhythms. APRR1/TOC1 and APRR5 seem to be substrates of the SCF(ADO2) complex. ADO2 interacts with ADO3 and export it to cytoplasmic speckles, preventing the interaction of ADO3 with CDF1. Ubiquitination of ADO2 is not involved in this recruitment.