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Immunogen sequence: RPRMNANSL LASPTGLSPY LRFGCLSCRL FYFKLTDLYK KVKKNSSPPL SLYGQLLWRE FFYTAATNNP RFDKMEGNPI CVQIPWDKNP EALAKWAEGR TGFPWIDAIM TQLRQEGWIH HLARHAVACF LTRGDLWISW EEGMKVFEEL LLDADWSINA GSWMWLSCSS FFQQFFHCYC PVGFGRRTDP NGDYIRRYLP VLRGFPAKYI YDPWNAPEGI QKVAKCLIGV NYPKPMVNHA EASRLNIERM KQIYQQLSRY RGLGLLASVP SNPNGNGGFM GYSAENIPGC SSSGSCSQGS GILHYAHGDS QQTHLLKQGR SSMGTGLSGG KRPSQEEDTQ SIGPKVQRQS TN (236-586 aa encoded by BC030519)
Various biochemical, physiological and behavioral processes display circadian rhythms controlled by an internal biological clock. The central "gears" driving this clock appear to be composed of an autoregulatory transcription/post translation-based feedback loop. Cryptochrome 1 (CRY1) and 2 (CRY2) are DNA-binding flavoproteins that bear some homology to blue-light receptors and photolyases. In Drosophila, CRY is a photoreceptor for the circadian clock where it binds to the clock component TIM in a light-dependent fashion and blocks its function. Mammalian CRY1 and CRY2 function via light-independent interactions with circadian genes CLOCK and BMAL1, as well as with PER1, PER2, and TIM. They seem to act as light-independent components of the circadian clock and likely regulate Per1 transcriptional cycling via interactions with both the activator and its feedback inhibitors. Mutant mice not expressing the Cry1 or Cry2 protein display accelerated and delayed periodicity of locomotor activity, respectively. It appears that the combination of both proteins working together is essential to synchronize the organism to circadian phases. A critical balance between Cry1 and Cry2 is required for proper clock function; in complete darkness, double-mutant mice present with instantaneous arrhythmicity, indicating the absence of an internal circadian clock.
For Research Use Only. Not for use in diagnostic procedures. Not for resale without express authorization.
Protein Aliases: cryptochrome 1 (photolyase-like); Cryptochrome-1
Gene Aliases: AU020726; AU021000; CRY1; PHLL1
UniProt ID: (Human) Q16526, (Rat) Q32Q86, (Mouse) P97784
Entrez Gene ID: (Human) 1407, (Rat) 299691, (Mouse) 12952
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