Rabbit PER2 Polyclonal Antibody | anti-PER2 antibody

Phospho-PER2 (Ser662) Antibody

Cat. Num. AAA9613102

• Gene Names: PER2; FASPS; FASPS1
• Reactivity: Human, Mouse, Rat; Predicted Reactivity: Pig (90%), Horse (90%), Rabbit (89%), Dog (89%), Chicken (80%)
• Applications: Western Blot, Immunohistochemistry, ELISA
• Purity: The antibody is from purified rabbit serum by affinity purification via sequential chromatography on phospho-peptide and non-phospho-peptide affinity columns.
• Synonyms: PER2; Polyclonal Antibody; Phospho-PER2 (Ser662) Antibody; Circadian clock protein PERIOD 2; FASPS; FASPS1; hPER 2; hPER2; KIAA0347; OTTHUMP00000164476; PER 2; PER2_HUMAN; Period 2; Period 2 isoform 1; Period circadian clock 2; Period circadian protein 2; Period circadian protein homolog 2; Period homolog 2 (Drosophila); Period homolog 2; Period; Drosophila; homolog of; 2; Period2; anti-PER2 antibody

• Host: Rabbit
• Reactivity: Human, Mouse, Rat; Predicted Reactivity: Pig (90%), Horse (90%), Rabbit (89%), Dog (89%), Chicken (80%)
• Clonality: Polyclonal
• Isotype: Rabbit IgG
• Specificity: Phospho-PER2 (Ser662) Antibody detects endogenous levels of PER2 only when phosphorylated at Ser662.; Tissue Specificity: Widely expressed. Found in heart, brain, placenta, lung, liver, skeleatal muscle, kidney and pancreas. High levels in skeletal muscle and pancreas. Low levels in lung. Isoform 2 is expressed in keratinocytes (at protein level).
• Purity/Purification: The antibody is from purified rabbit serum by affinity purification via sequential chromatography on phospho-peptide and non-phospho-peptide affinity columns.
• Form/Format: Liquid. Rabbit IgG in phosphate buffered saline, pH7.4, 150mM NaCl, 0.02% sodium azide and 50% glycerol.
• Concentration: 1mg/ml (varies by lot)

• Applicable Applications for anti-PER2 antibody: Western Blot (WB), Immunohistochemistry (IHC), Peptide ELISA (EIA)
• Application Notes: WB: 1:500-1:2000; IHC: 1:50-1:200; Peptide ELISA: 1:20,000-1:40,000
• Immunogen: A synthesized peptide derived from human PER2 around the phosphorylation site of Ser662.
• Conjugation: Unconjugated
• Fragment: Fab fragment
• Post Translational Modifications: Acetylated. Deacetylated by SIRT1, resulting in decreased protein stability.Phosphorylated by CSNK1E and CSNK1D. Phosphorylation results in PER2 protein degradation. May be dephosphorylated by PP1.Ubiquitinated, leading to its proteasomal degradation. Ubiquitination may be inhibited by CRY1.
• Subunit Structure: Homodimer. Component of the circadian core oscillator, which includes the CRY proteins, CLOCK or NPAS2, ARTNL/BMAL1 or ARTNL2/BMAL2, CSNK1D and/or CSNK1E, TIMELESS, and the PER proteins. Interacts with CLOCK-ARNTL/BMAL1 (off DNA).Interacts with ARNTL2/BMAL2. Interacts directly with PER1 and PER3, and through a C-terminal domain, with CRY1 and CRY2. Interacts, via its second PAS domain, with TIMELESS in vitro. Interacts with NFIL3. Different large complexes have been identified with different repressive functions. The core of PER complexes is composed of at least PER1, PER2, PER3, CRY1, CRY2, CSNK1D and/or CSNK1E. The large PER complex involved in the repression of transcriptional termination is composed of at least PER2, CDK9, DDX5, DHX9, NCBP1 and POLR2A (active). The large PER complex involved in the histone deacetylation is composed of at least HDAC1, PER2, SFPQ and SIN3A. The large PER complex involved in the histone methylation is composed of at least PER2, CBX3, TRIM28, SUV39H1 and/or SUV39H2; CBX3 mediates the formation of the complex. Interacts with SETX; the interaction inhibits termination of circadian target genes. Interacts with the nuclear receptors HNF4A, NR1D1, NR4A2, RORA, PPARA, PPARG and THRA; the interaction with at least PPARG is ligand dependent. Interacts with PML. Interacts (phosphorylated) with BTRC and FBXW11; the interactions trigger proteasomal degradation. Interacts with NONO and SFPQ. Interacts with SIRT1 and CAVIN3 (By similarity). Interacts with MAGEL2 (By similarity). Interacts with MAP1LC3B (By similarity). Interacts with HNF4A.
• Subcellular Location: Nucleus. Cytoplasm. Cytoplasm>Perinuclear region.; Note: Nucleocytoplasmic shuttling is effected by interaction with other circadian core oscillator proteins and/or by phosphorylation. Translocate to the nucleus after phosphorylation by CSNK1D or CSNK1E. Also translocated to the nucleus by CRY1 or CRY2. PML regulates its nuclear localization.Nucleus>Nucleolus.
• Preparation and Storage: Store at -20 degree C. Stable for 12 months from date of receipt.

Western Blot (WB)

(Western blot analysis of extracts from Mouse lung, using Phospho-PER2 (Ser662) Antibody. The lane on the left was treated with blocking peptide.)

Western Blot (WB)

(Western blot analysis of extracts from HeLa  , using Phospho-PER2(Ser662) Antibody. Lane1 was treated with phospho-blocking peptide, Lane2 was treated with non-phospho-blocking peptide.)

Immunohistochemistry (IHC)

(At 1/100 staining Mouse ovarian tissue by IHC-P. The sample was formaldehyde fixed and a heat mediated antigen retrieval step in citrate buffer was performed. The sample was then blocked and incubated with the primary antibody at 4 degree C overnight. An HRP conjugated anti-Rabbit antibody was used as the secondary antibody.)

Related Product Information for anti-PER2 antibody

Transcriptional 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 syndrome 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|NPAS2-ARNTL/BMAL1|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. PER1 and PER2 proteins transport CRY1 and CRY2 into the nucleus with appropriate circadian timing, but also contribute directly to repression of clock-controlled target genes through interaction with several classes of RNA-binding proteins, helicases and others transcriptional repressors. PER appears to regulate circadian control of transcription by at least three different modes. First, interacts directly with the CLOCK-ARTNL/BMAL1 at the tail end of the nascent transcript peak to recruit complexes containing the SIN3-HDAC that remodel chromatin to repress transcription. Second, brings H3K9 methyltransferases such as SUV39H1 and SUV39H2 to the E-box elements of the circadian target genes, like PER2 itself or PER1. The recruitment of each repressive modifier to the DNA seems to be very precisely temporally orchestrated by the large PER complex, the deacetylases acting before than the methyltransferases. Additionally, large PER complexes are also recruited to the target genes 3' termination site through interactions with RNA-binding proteins and helicases that may play a role in transcription termination to regulate transcription independently of CLOCK-ARTNL/BMAL1 interactions. Recruitment of large PER complexes to the elongating polymerase at PER and CRY termination sites inhibited SETX action, impeding RNA polymerase II release and thereby repressing transcriptional reinitiation. May propagate clock information to metabolic pathways via the interaction with nuclear receptors. Coactivator of PPARA and corepressor of NR1D1, binds rhythmically at the promoter of nuclear receptors target genes like ARNTL or G6PC. Directly and specifically represses PPARG proadipogenic activity by blocking PPARG recruitment to target promoters and thereby inhibiting transcriptional activation. Required for fatty acid and lipid metabolism, is involved as well in the regulation of circulating insulin levels. Plays an important role in the maintenance of cardiovascular functions through the regulation of NO and vasodilatatory prostaglandins production in aortas. Controls circadian glutamate uptake in synaptic vesicles through the regulation of VGLUT1 expression. May also be involved in the regulation of inflammatory processes. Represses the CLOCK-ARNTL/BMAL1 induced transcription of BHLHE40/DEC1 and ATF4. Negatively regulates the formation of the TIMELESS-CRY1 complex by competing with TIMELESS for binding to CRY1.

NCBI and Uniprot Product Information

• NCBI GI #: 12707562
• NCBI GeneID: 8864
• NCBI Accession #: NP_073728.1
• NCBI GenBank Nucleotide #: NM_022817.2
• UniProt Accession #: O15055; Q4ZG49; Q9UQ45; A2I2P7
• Molecular Weight: 136,579 Da
• NCBI Official Full Name: period circadian protein homolog 2
• NCBI Official Synonym Full Names: period circadian clock 2
• NCBI Official Symbol: PER2
• NCBI Official Synonym Symbols: FASPS; FASPS1
• NCBI Protein Information: period circadian protein homolog 2; hPER2; period 2; period homolog 2; period circadian protein 2; circadian clock protein PERIOD 2
• UniProt Protein Name: Period circadian protein homolog 2
• Protein Family: Period circadian protein
• UniProt Gene Name: PER2
• UniProt Synonym Gene Names: KIAA0347; hPER2
• UniProt Entry Name: PER2_HUMAN

NCBI Description

This gene is a member of the Period family of genes and is expressed in a circadian pattern in the suprachiasmatic nucleus, the primary circadian pacemaker in the mammalian brain. Genes in this family encode components of the circadian rhythms of locomotor activity, metabolism, and behavior. Circadian expression in the suprachiasmatic nucleus continues in constant darkness, and a shift in the light/dark cycle evokes a proportional shift of gene expression in the suprachiasmatic nucleus. The specific function of this gene is not yet known. [provided by RefSeq, Jul 2008]

Uniprot Description

PER2: a transcription factor belonging to the basic helix-loop-helix (bHLH) family. A member of the Period family of genes and is expressed in a circadian pattern in the suprachiasmatic nucleus, the primary circadian pacemaker in the mammalian brain. Genes in this family encode components of the circadian rhythms of locomotor activity, metabolism, and behavior. Circadian expression in the suprachiasmatic nucleus continues in constant darkness, and a shift in the light/dark cycle evokes a proportional shift of gene expression in the suprachiasmatic nucleus. Behaves as a negative element in circadian transcriptional loop. Does not appear to bind DNA, suggesting indirect transcriptional inhibition. Expression oscillates with a 24 hr rhythm in the suprachiasmatic nucleus and the whole eyes. Oscillations are maintained under constant darkness and are responsive to changes of the light/dark cycles. There is a 4 hour time delay between per1 and per2 oscillations. The expression rhythms appear to originate from retina.

Protein type: Nucleolus; Transcription factor; Nuclear receptor co-regulator

Chromosomal Location of Human Ortholog: 2q37.3

Cellular Component: nucleoplasm; perinuclear region of cytoplasm; cytoplasm; nucleolus; nucleus

Molecular Function: ubiquitin binding; signal transducer activity; protein binding; histone deacetylase binding; transcription coactivator activity; kinase binding; nuclear hormone receptor binding

Biological Process: circadian rhythm; glycogen biosynthetic process; transcription, DNA-dependent; regulation of cell cycle; negative regulation of transcription from RNA polymerase II promoter; fatty acid metabolic process; regulation of circadian rhythm; signal transduction; regulation of glutamate uptake during transmission of nerve impulse; gluconeogenesis; regulation of neurogenesis; regulation of vasoconstriction; white fat cell differentiation; lactate biosynthetic process; negative regulation of protein ubiquitination; negative regulation of circadian rhythm; circadian regulation of gene expression; negative regulation of transcription, DNA-dependent; regulation of insulin secretion

Disease: Advanced Sleep Phase Syndrome, Familial, 1