Substrate-recognition component of the SCF (SKP1-CUL1-F-box protein)-type E3 ubiquitin ligase complex that is implicated in the control of various cellular processes such as cell cycle control, transcriptional regulation, DNA damage repair, and apoptosis. Promotes the proteasome-dependent degradation of key sarcomeric proteins, such as alpha-actinin (ACTN2) and filamin-C (FLNC), essential for maintenance of normal contractile function. Acts as a key regulator of histone methylation marks namely H3K9 and H3K36 methylation through the regulation of histone demethylase KDM4A protein levels (PubMed:21768309). In complex with KDM4A, also regulates the abundance of TP53 by targeting methylated TP53 for degradation at the late senescent stage (PubMed:26868148). Under oxidative stress, promotes the ubiquitination and degradation of BACH1. Mechanistically, reactive oxygen species (ROS) covalently modify cysteine residues on the bZIP domain of BACH1, leading to its release from chromatin and making it accessible to FBXO22 (PubMed:39504958). Upon amino acid depletion, mediates ''Lys-27''-linked ubiquitination of MTOR and thereby inhibits substrate recruitment to mTORC1 (PubMed:37979583). Also inhibits SARS-CoV-2 replication by inducing NSP5 degradation (PubMed:39223933).

F-box only protein 22 (F-box protein FBX22p44)
FBXO22 FBX22 FBX22; FISTC1

Q8NEZ5

Human, Mouse, Rat

WB

WB 1:500-2000

44.3 kDa

Mouse

Human recombinant protein fragment corresponding to amino acids 1-220 of human FBXO22 (NP_671717) produced in E.coli.

Monoclonal

Purified from mouse ascites fluids or tissue culture supernatant by affinity chromatography (protein A/G)

PBS (pH 7.3) containing 1% BSA, 50% glycerol and 0.02% sodium azide.

Store at -20 °C. Stable for 12 months from date of receipt.