DNMT3B
DNK (citozin-5)-metiltransferaza 3 beta, je enzim koji je kod ljudi kodiran DNMT3B genom.[4] Mutacije ovog gena su asocirane sa imunodeficijencijom, nestabilnosti centromera i sindromom anomalija lica.[5]
Funkcija
уредиCpG metilacija je epigenetska modifikacija koja je važna za embrionalni razvoj, utiskivanje i inaktivaciju X-hromozoma. Studije na miševima su pokazale da je metilacija DNK potrebna za razvoj sisara. Ovaj gen kodira DNK metiltransferazu za koju se smatra da funkcioniše u de novo metilaciji, a ne u održavanju metilacije. Protein se prvenstveno lokalizuje u jedru i njegova ekspresija je razvojno regulisana. Opisano je osam alternativno spojenih varijanti transkripta. Sekvence pune dužine varijanti 4 i 5 nisu određene.[4]
Klinički značaj
уредиSindrom imunodeficijencije-centromerne nestabilnosti-anomalije lica (ICF) je rezultat defekata u sazrevanju limfocita koji su rezultat aberantne metilacije DNK uzrokovane mutacijama u genu DNMT3B.[5]
Varijante ovog gena takođe mogu doprineti zavisnosti od nikotina.[6]
Interakcije
уредиPokazano je da DNMT3B formira interakcije sa:
Reference
уреди- ^ а б в GRCm38: Ensembl release 89: ENSMUSG00000027478 - Ensembl, May 2017
- ^ „Human PubMed Reference:”. National Center for Biotechnology Information, U.S. National Library of Medicine.
- ^ „Mouse PubMed Reference:”. National Center for Biotechnology Information, U.S. National Library of Medicine.
- ^ а б „Entrez Gene: DNMT3B DNA (cytosine-5-)-methyltransferase 3 beta”.
- ^ а б Ehrlich M (октобар 2003). „The ICF syndrome, a DNA methyltransferase 3B deficiency and immunodeficiency disease”. Clinical Immunology. 109 (1): 17—28. PMID 14585272. doi:10.1016/S1521-6616(03)00201-8.
- ^ Hancock DB, Guo Y, Reginsson GW, Gaddis NC, Lutz SM, Sherva R, et al. (октобар 2017). „Genome-wide association study across European and African American ancestries identifies a SNP in DNMT3B contributing to nicotine dependence”. Molecular Psychiatry. 23 (9): 1911—1919. PMC 5882602 . PMID 28972577. doi:10.1038/mp.2017.193.
- ^ а б в Lehnertz B, Ueda Y, Derijck AA, Braunschweig U, Perez-Burgos L, Kubicek S, Chen T, Li E, Jenuwein T, Peters AH (јул 2003). „Suv39h-mediated histone H3 lysine 9 methylation directs DNA methylation to major satellite repeats at pericentric heterochromatin”. Current Biology. 13 (14): 1192—200. PMID 12867029. S2CID 2320997. doi:10.1016/s0960-9822(03)00432-9 .
- ^ а б Kim GD, Ni J, Kelesoglu N, Roberts RJ, Pradhan S (август 2002). „Co-operation and communication between the human maintenance and de novo DNA (cytosine-5) methyltransferases”. The EMBO Journal. 21 (15): 4183—95. PMC 126147 . PMID 12145218. doi:10.1093/emboj/cdf401.
- ^ Ling Y, Sankpal UT, Robertson AK, McNally JG, Karpova T, Robertson KD (2004). „Modification of de novo DNA methyltransferase 3a (Dnmt3a) by SUMO-1 modulates its interaction with histone deacetylases (HDACs) and its capacity to repress transcription”. Nucleic Acids Research. 32 (2): 598—610. PMC 373322 . PMID 14752048. doi:10.1093/nar/gkh195.
- ^ а б в Geiman TM, Sankpal UT, Robertson AK, Chen Y, Mazumdar M, Heale JT, Schmiesing JA, Kim W, Yokomori K, Zhao Y, Robertson KD (2004). „Isolation and characterization of a novel DNA methyltransferase complex linking DNMT3B with components of the mitotic chromosome condensation machinery”. Nucleic Acids Research. 32 (9): 2716—29. PMC 419596 . PMID 15148359. doi:10.1093/nar/gkh589.
- ^ а б Kang ES, Park CW, Chung JH (децембар 2001). „Dnmt3b, de novo DNA methyltransferase, interacts with SUMO-1 and Ubc9 through its N-terminal region and is subject to modification by SUMO-1”. Biochemical and Biophysical Research Communications. 289 (4): 862—8. PMID 11735126. doi:10.1006/bbrc.2001.6057.
Literatura
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- Rhee I, Bachman KE, Park BH, Jair KW, Yen RW, Schuebel KE, Cui H, Feinberg AP, Lengauer C, Kinzler KW, Baylin SB, Vogelstein B (април 2002). „DNMT1 and DNMT3b cooperate to silence genes in human cancer cells”. Nature. 416 (6880): 552—6. PMID 11932749. S2CID 4397868. doi:10.1038/416552a.
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- Deplus R, Brenner C, Burgers WA, Putmans P, Kouzarides T, de Launoit Y, Fuks F (септембар 2002). „Dnmt3L is a transcriptional repressor that recruits histone deacetylase”. Nucleic Acids Research. 30 (17): 3831—8. PMC 137431 . PMID 12202768. doi:10.1093/nar/gkf509.
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