Blue light-dependent regulator that is the input of the circadian feedback loop. Has no photolyase activity for cyclobutane pyrimidine dimers or 6-4 photoproducts. Regulation of expression by light suggests a role in photoreception for locomotor activity rhythms. Functions, together with per, as a transcriptional repressor required for the oscillation of peripheral circadian clocks and for the correct specification of clock cells. Genes directly activated by the transcription factors Clock (Clk) and cycle (cyc) are repressed by cry. Aedes aegypti (taxid: 7159)
Blue light-dependent regulator that is the input of the circadian feedback loop. Has no photolyase activity for cyclobutane pyrimidine dimers or 6-4 photoproducts. Regulation of expression by light suggests a role in photoreception for locomotor activity rhythms. Functions, together with per, as a transcriptional repressor required for the oscillation of peripheral circadian clocks and for the correct specification of clock cells. Genes directly activated by the transcription factors Clock (Clk) and cycle (cyc) are repressed by cry.
Blue light-dependent regulator that is the input of the circadian feedback loop. Has no photolyase activity for cyclobutane pyrimidine dimers or 6-4 photoproducts. Regulation of expression by light suggests a role in photoreception for locomotor activity rhythms. Functions, together with per, as a transcriptional repressor required for the oscillation of peripheral circadian clocks and for the correct specification of clock cells. Genes directly activated by the transcription factors Clock (Clk) and cycle (cyc) are repressed by cry. Necessary for light-dependent magnetosensitivity, an intact circadian system is not required for the magnetoreception mechanism to operate. Required for both the naive and trained responses to magnetic field, consistent with the notion that cry is in the input pathway of magnetic sensing.
Blue light-dependent regulator that is the input of the circadian feedback loop. Has no photolyase activity for cyclobutane pyrimidine dimers or 6-4 photoproducts. Regulation of expression by light suggests a role in photoreception for locomotor activity rhythms. Light induces the degradation of cry, likely due to conformational change in the photoreceptor leading to targeting to the proteasome. Under circadian regulation, expression is influenced by the clock pacemaker genes period, timeless, Clock and cycle. Binding to tim irreversibly commits tim to proteasomal degradation. Functions, together with per, as a transcriptional repressor required for the oscillation of peripheral circadian clocks and for the correct specification of clock cells. Genes directly activated by the transcription factors Clock (Clk) and cycle (cyc) are repressed by cry. Necessary for light-dependent magnetosensitivity, an intact circadian system is not required for the magnetoreception mechanism to operate. Required for both the naive and trained responses to magnetic field, consistent with the notion that Cry is in the input pathway of magnetic sensing.
Involved in repair of UV radiation-induced DNA damage. Catalyzes the photoreactivation of pyrimidine [6-4] pyrimidone photoproduct (6-4 products). Binds specifically to DNA containing 6-4 products and repairs these lesions in a visible light-dependent manner. Not required for repair of cyclobutane pyrimidine dimer (CPD).
Blue light-dependent regulator of the circadian feedback loop. Inhibits CLOCK|NPAS2-ARNTL E box-mediated transcription. Acts, in conjunction with CRY2, in maintaining period length and circadian rhythmicity. Has no photolyase activity. Capable of translocating circadian clock core proteins such as PER proteins to the nucleus. May inhibit CLOCK|NPAS2-ARNTL transcriptional activity through stabilizing the unphosphorylated form of ARNTL.
Blue light-dependent regulator of the circadian feedback loop. Inhibits CLOCK|NPAS2-ARNTL E box-mediated transcription. Acts, in conjunction with CRY2, in maintaining period length and circadian rhythmicity. Has no photolyase activity. Capable of translocating circadian clock core proteins such as PER proteins to the nucleus. May inhibit CLOCK|NPAS2-ARNTL transcriptional activity through stabilizing the unphosphorylated form of ARNTL.
Sylvia borin (taxid: 73324)
Close Homologs in the Non-Redundant Database Detected by BLAST
Photolyases and cryptochromes are related flavoproteins. Photolyases harness the energy of blue light to repair DNA damage by removing pyrimidine dimers. Cryptochromes do not repair DNA and are presumed to act instead in some other (possibly unknown) process such as entraining circadian rhythms. This model describes the cryptochrome DASH subfamily, one of at least five major subfamilies, which is found in plants, animals, marine bacteria, etc. Members of this family bind both folate and FAD. They may show weak photolyase activity in vitro but have not been shown to affect DNA repair in vivo. Rather, DASH family cryptochromes have been shown to bind RNA (Vibrio cholerae VC1814), or DNA, and seem likely to act in light-responsive regulatory processes [Cellular processes, Adaptations to atypical conditions, Regulatory functions, DNA interactions]. Length = 429
>gnl|CDD|131813 TIGR02766, crypt_chrom_pln, cryptochrome, plant family
At least five major families of cryptochomes and photolyases share FAD cofactor binding, sequence homology, and the ability to react to short wavelengths of visible light. Photolysases are responsible for light-dependent DNA repair by removal of two types of uv-induced DNA dimerizations. Cryptochromes have other functions, often regulatory and often largely unknown, which may include circadian clock entrainment and control of development. Members of this subfamily are known so far only in plants; they may show some photolyase activity in vitro but appear mostly to be regulatory proteins that respond to blue light. Length = 475
>gnl|CDD|223492 COG0415, PhrB, Deoxyribodipyrimidine photolyase [DNA replication, recombination, and repair]
; InterPro: IPR006050 DNA photolyases are enzymes that bind to DNA containing pyrimidine dimers: on absorption of visible light, they catalyse dimer splitting into the constituent monomers, a process called photoreactivation []. This is a DNA repair mechanism, repairing mismatched pyrimidine dimers induced by exposure to ultra-violet light []. The precise mechanisms involved in substrate binding, conversion of light energy to the mechanical energy needed to rupture the cyclobutane ring, and subsequent release of the product are uncertain []. Analysis of DNA lyases has revealed the presence of an intrinsic chromophore, all monomers containing a reduced FAD moiety, and, in addition, either a reduced pterin or 8-hydroxy-5-diazaflavin as a second chromophore [, ]. Either chromophore may act as the primary photon acceptor, peak absorptions occurring in the blue region of the spectrum and in the UV-B region, at a wavelength around 290nm []. This domain binds a light harvesting cofactor.; GO: 0003913 DNA photolyase activity, 0006281 DNA repair; PDB: 3UMV_A 2J07_A 1IQU_A 2J09_A 2J08_A 1IQR_A 1DNP_A 3FY4_B 2VTB_A 2J4D_B ....
Photolyases and cryptochromes are related flavoproteins. Photolyases harness the energy of blue light to repair DNA damage by removing pyrimidine dimers. Cryptochromes do not repair DNA and are presumed to act instead in some other (possibly unknown) process such as entraining circadian rhythms. This model describes the cryptochrome DASH subfamily, one of at least five major subfamilies, which is found in plants, animals, marine bacteria, etc. Members of this family bind both folate and FAD. They may show weak photolyase activity in vitro but have not been shown to affect DNA repair in vivo. Rather, DASH family cryptochromes have been shown to bind RNA (Vibrio cholerae VC1814), or DNA, and seem likely to act in light-responsive regulatory processes.
>TIGR02766 crypt_chrom_pln cryptochrome, plant family
At least five major families of cryptochomes and photolyases share FAD cofactor binding, sequence homology, and the ability to react to short wavelengths of visible light. Photolysases are responsible for light-dependent DNA repair by removal of two types of uv-induced DNA dimerizations. Cryptochromes have other functions, often regulatory and often largely unknown, which may include circadian clock entrainment and control of development. Members of this subfamily are known so far only in plants; they may show some photolyase activity in vitro but appear mostly to be regulatory proteins that respond to blue light.
All proteins in this family for which functions are known are DNA-photolyases used for the direct repair of UV irradiation induced DNA damage. Some repair 6-4 photoproducts while others repair cyclobutane pyrimidine dimers. This family is based on the phylogenomic analysis of JA Eisen (1999, Ph.D. Thesis, Stanford University).
This model describes a narrow clade of cyanobacterial deoxyribodipyrimidine photo-lyase. This group, in contrast to several closely related proteins, uses a chromophore that, in other lineages is modified further to become coenzyme F420. This chromophore is called 8-HDF in most articles on the DNA photolyase and FO in most literature on coenzyme F420.
>COG0415 PhrB Deoxyribodipyrimidine photolyase [DNA replication, recombination, and repair]
>1dnp_A DNA photolyase; DNA repair, electron transfer, excitation energy transfer, carbon-carbon, lyase (carbon-carbon); HET: DNA FAD MHF; 2.30A {Escherichia coli} SCOP: a.99.1.1 c.28.1.1
