• Product nameAnti-Cryptochrome I antibody
    See all Cryptochrome I primary antibodies
  • Description
    Mouse monoclonal to Cryptochrome I
  • Tested applicationsSuitable for: WB, ICC/IF, IHC-P, Flow Cytmore details
  • Species reactivity
    Reacts with: Human
  • Immunogen

    Recombinant full length protein, corresponding to amino acids 1-587 of Human Cryptochrome I



Our Abpromise guarantee covers the use of ab54649 in the following tested applications.

The application notes include recommended starting dilutions; optimal dilutions/concentrations should be determined by the end user.

Application Abreviews Notes
WB Use a concentration of 1 - 5 µg/ml. Predicted molecular weight: 66 kDa.
ICC/IF Use a concentration of 10 µg/ml.
IHC-P Use a concentration of 5 µg/ml.
Flow Cyt Use 1µg for 106 cells. ab170190-Mouse monoclonal IgG1, is suitable for use as an isotype control with this antibody.


  • FunctionTranscriptional repressor which forms a core component of the circadian clock. The circadian clock, an internal time-keeping system, regulates various physiological processes through the generation of approximately 24 hour circadian rhythms in gene expression, which are translated into rhythms in metabolism and behavior. It is derived from the Latin roots 'circa' (about) and 'diem' (day) and acts as an important regulator of a wide array of physiological functions including metabolism, sleep, body temperature, blood pressure, endocrine, immune, cardiovascular, and renal function. Consists of two major components: the central clock, residing in the suprachiasmatic nucleus (SCN) of the brain, and the peripheral clocks that are present in nearly every tissue and organ system. Both the central and peripheral clocks can be reset by environmental cues, also known as Zeitgebers (German for 'timegivers'). The predominant Zeitgeber for the central clock is light, which is sensed by retina and signals directly to the SCN. The central clock entrains the peripheral clocks through neuronal and hormonal signals, body temperature and feeding-related cues, aligning all clocks with the external light/dark cycle. Circadian rhythms allow an organism to achieve temporal homeostasis with its environment at the molecular level by regulating gene expression to create a peak of protein expression once every 24 hours to control when a particular physiological process is most active with respect to the solar day. Transcription and translation of core clock components (CLOCK, NPAS2, ARNTL/BMAL1, ARNTL2/BMAL2, PER1, PER2, PER3, CRY1 and CRY2) plays a critical role in rhythm generation, whereas delays imposed by post-translational modifications (PTMs) are important for determining the period (tau) of the rhythms (tau refers to the period of a rhythm and is the length, in time, of one complete cycle). A diurnal rhythm is synchronized with the day/night cycle, while the ultradian and infradian rhythms have a period shorter and longer than 24 hours, respectively. Disruptions in the circadian rhythms contribute to the pathology of cardiovascular diseases, cancer, metabolic syndromes and aging. A transcription/translation feedback loop (TTFL) forms the core of the molecular circadian clock mechanism. Transcription factors, CLOCK or NPAS2 and ARNTL/BMAL1 or ARNTL2/BMAL2, form the positive limb of the feedback loop, act in the form of a heterodimer and activate the transcription of core clock genes and clock-controlled genes (involved in key metabolic processes), harboring E-box elements (5'-CACGTG-3') within their promoters. The core clock genes: PER1/2/3 and CRY1/2 which are transcriptional repressors form the negative limb of the feedback loop and interact with the CLOCK
    ARNTL2/BMAL2 heterodimer inhibiting its activity and thereby negatively regulating their own expression. This heterodimer also activates nuclear receptors NR1D1/2 and RORA/B/G, which form a second feedback loop and which activate and repress ARNTL/BMAL1 transcription, respectively. CRY1 and CRY2 have redundant functions but also differential and selective contributions at least in defining the pace of the SCN circadian clock and its circadian transcriptional outputs. More potent transcriptional repressor in cerebellum and liver than CRY2, though more effective in lengthening the period of the SCN oscillator. On its side, CRY2 seems to play a critical role in tuning SCN circadian period by opposing the action of CRY1. With CRY2, is dispensable for circadian rhythm generation but necessary for the development of intercellular networks for rhythm synchrony. Capable of translocating circadian clock core proteins such as PER proteins to the nucleus. Interacts with CLOCK-ARNTL/BMAL1 independently of PER proteins and is found at CLOCK-ARNTL/BMAL1-bound sites, suggesting that CRY may act as a molecular gatekeeper to maintain CLOCK-ARNTL/BMAL1 in a poised and repressed state until the proper time for transcriptional activation. Represses the CLOCK-ARNTL/BMAL1 induced transcription of BHLHE40/DEC1. Represses the CLOCK-ARNTL/BMAL1 induced transcription of ATF4, MTA1, KLF10 and NAMPT (By similarity). May repress circadian target genes expression in collaboration with HDAC1 and HDAC2 through histone deacetylation. Mediates the clock-control activation of ATR and modulates ATR-mediated DNA damage checkpoint. In liver, mediates circadian regulation of cAMP signaling and gluconeogenesis by binding to membrane-coupled G proteins and blocking glucagon-mediated increases in intracellular cAMP concentrations and CREB1 phosphorylation. Besides its role in the maintenance of the circadian clock, is also involved in the regulation of other processes. Represses glucocorticoid receptor NR3C1/GR-induced transcriptional activity by binding to glucocorticoid response elements (GREs). Plays a key role in glucose and lipid metabolism modulation, in part, through the transcriptional regulation of genes involved in these pathways, such as LEP or ACSL4.
  • Sequence similaritiesBelongs to the DNA photolyase class-1 family.
    Contains 1 photolyase/cryptochrome alpha/beta domain.
  • Post-translational
    Phosphorylation on Ser-247 by MAPK is important for the inhibition of CLOCK-ARNTL/BMAL1-mediated transcriptional activity. Phosphorylation by CSNK1E requires interaction with PER1 or PER2. Phosphorylation at Ser-71 and Ser-280 by AMPK decreases protein stability. Phosphorylation at Ser-568 exhibits a robust circadian rhythm with a peak at CT8, increases protein stability, prevents SCF(FBXL3)-mediated degradation and is antagonized by interaction with PRKDC.
    Ubiquitinated by the SCF(FBXL3) and SCF(FBXL21) complexes, regulating the balance between degradation and stabilization. The SCF(FBXL3) complex is mainly nuclear and mediates ubiquitination and subsequent degradation of CRY1. In contrast, cytoplasmic SCF(FBXL21) complex-mediated ubiquitination leads to stabilize CRY1 and counteract the activity of the SCF(FBXL3) complex. The SCF(FBXL3) and SCF(FBXL21) complexes probably mediate ubiquitination at different Lys residues. Ubiquitination at Lys-11 and Lys-107 are specifically ubiquitinated by the SCF(FBXL21) complex but not by the SCF(FBXL3) complex. Ubiquitination may be inhibited by PER2.
  • Cellular localizationCytoplasm. Nucleus. Translocated to the nucleus through interaction with other clock proteins such as PER2 or ARNTL/BMAL1.
  • Information by UniProt
  • Database links
  • Alternative names
    • Cry1 antibody
    • CRY1_HUMAN antibody
    • Cryptochrome 1 (photolyase like) antibody
    • Cryptochrome 1 antibody
    • Cryptochrome-1 antibody
    • PHLL1 antibody
    • Photolyase 1 antibody
    • Photolyase-like antibody
    see all

Anti-Cryptochrome I antibody images

  • Cryptochrome I antibody (ab54649) used in immunofluorescence at 10ug/ml on HeLa cells.
  • Cryptochrome I antibody (ab54649) used in immunohistochemistry at 5ug/ml on formalin fixed and paraffin embedded human colon adenocarcinoma tissue.

  • Predicted band size : 66 kDa
  • Overlay histogram showing HeLa cells stained with ab54649 (red line). The cells were fixed with 80% methanol (5 min) and then permeabilized with 0.1% PBS-Tween for 20 min. The cells were then incubated in 1x PBS / 10% normal goat serum / 0.3M glycine to block non-specific protein-protein interactions followed by the antibody (ab54649, 1µg/1x106 cells) for 30 min at 22°C. The secondary antibody used was DyLight® 488 goat anti-mouse IgG (H+L) (ab96879) at 1/500 dilution for 30 min at 22°C. Isotype control antibody (black line) was mouse IgG1 [ICIGG1] (ab91353, 2µg/1x106 cells) used under the same conditions. Acquisition of >5,000 events was performed. This antibody gave a positive signal in HeLa cells fixed with 4% paraformaldehyde/permeabilized in 0.1% PBS-Tween used under the same conditions.

References for Anti-Cryptochrome I antibody (ab54649)

This product has been referenced in:
  • Yu H  et al. Cryptochrome 1 overexpression correlates with tumor progression and poor prognosis in patients with colorectal cancer. PLoS One 8:e61679 (2013). IHC-P ; Human . Read more (PubMed: 23626715) »

See 1 Publication for this product

Product Wall

Application Immunohistochemistry (PFA perfusion fixed frozen sections)
Sample Hamster Tissue sections (heart)
Antigen retrieval step None
Permeabilization No
Specification heart
Blocking step Serum as blocking agent for 30 minute(s) · Concentration: 10% · Temperature: 21°C
Fixative Paraformaldehyde

Abcam user community

Verified customer

Submitted Nov 11 2016

Thank you for confirming these details and for your cooperation. The details provided enable us to closely monitor the quality of our products.
As requested, I have issued a free of charge replacement with ab114543 with the order number x.

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I am sorry to hear you have been experiencing problems with our Cryptochrome antibodies. The quality of our products is important to us and I would like to reassure you that we investigate all customer complaints.
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Application Western blot
Sample Mouse Tissue lysate - whole (brain)
Loading amount 25 µg
Specification brain
Gel Running Conditions Reduced Denaturing (10% gel)
Blocking step Milk as blocking agent for 1 hour(s) and 0 minute(s) · Concentration: 5% · Temperature: 25°C

Abcam user community

Verified customer

Submitted Oct 31 2011

Abcam guarantees this product to work in the species/application used in this Abreview.
Application Immunocytochemistry/ Immunofluorescence
Sample Human Cell (pooled primary human keratinocytes)
Specification pooled primary human keratinocytes
Fixative Paraformaldehyde
Permeabilization Yes - 0.1% Triton-X-100
Blocking step BSA as blocking agent for 1 hour(s) and 0 minute(s) · Concentration: 1% · Temperature: 25°C

Dr. Joerg Liebmann

Verified customer

Submitted May 18 2010