Substrate-recognition component of the SCF(FBXL21) E3 ubiquitin ligase complex involved in circadian rhythm function. Plays a key role in the maintenance of both the speed and the robustness of the circadian clock oscillation. The SCF(FBXL21) complex mainly acts in the cytosol and mediates ubiquitination of CRY proteins (CRY1 and CRY2), leading to CRY proteins stabilization. The SCF(FBXL21) complex counteracts the activity of the SCF(FBXL3) complex and protects CRY proteins from degradation. Involved in the hypothalamic suprachiasmatic nucleus (SCN) clock regulating temporal organization of the daily activities.

434 amino acids

MKRNRLSFMNKVLLSSPAVKQPRLGCCSPLSQAHMRAARLDWGSLPHRVVLCVFQYLPLIDRARASSVCRRWNEVFHIPDLWRKFEFELNQSATSYFNSTHPDLIQQIIKKHAAHLQYVSFKVDSSTESAEAACGILSQLVNCSTQTLGLISTAKPSFMTMSKSHFVSALTVLFVNSKSLSSIKIEDTPVDDPSLSILVANNSDTLRRLKMSSCPHVSSDGILCVADHCQGLRELALNYYMLSDELLLALSNETHVNLEHLRIDVVSENPGQIEFHSIKRQSWDALIKHSPGVNVVMYFFLYEEEMETFFKEETPVTHLYFGRSVSKGILGRLSLNCPRLVELVVCANGIQVIDNELICIAEHCKNLTALGLSECEVSCTAFIEFVRLCGRKLTHLSIMEDVLIPDDVCSLDEIHTEVSKYLGRIWFPDVMPVW

49 kDa

(Note: Representative image - actual molecular weight may vary depending on tag type and expression method)

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