PRDM9
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PR domain[note 1] zinc finger protein 9 is a protein that in humans is encoded by the PRDM9 gene.[5] PRDM9 is responsible for positioning recombination hotspots during meiosis by binding a DNA sequence motif encoded in its zinc finger domain.[6] PRDM9 is the only speciation gene found so far in mammals, and is one of the fastest evolving genes in the genome.[7][8]
Domain Architecture
PRDM9 has multiple domains including KRAB domain, SSXRD, PR/SET domain (H3K4 & H3K36 trimethyltransferase), and an array of C2H2 Zinc Finger domains (DNA binding).[9]
History
In 1974 Jiri Forejt and P. Ivanyi identified a locus which they named Hst1 which controlled hybrid sterility.[10]
In 1982 a haplotype was identified controlling recombination rate wm7,[11] which would later be identified as PRDM9.[12]
In 1991 a protein binding to the minisatelite consensus sequence 5′-CCACCTGCCCACCTCT-3′ was detected and partially purified (named Msbp3 - minisatelite binding protein 3).[13] This would later turn out to be the same PRDM9 protein independently identified later.[14]
In 2005 a gene was identified (named Meisetz) that is required for progression through meiotic prophase and has H3K4 methyltransferase activity.[15]
In 2009 Jiri Forejt and colleagues identified Hst1 as Meisetz/PRDM9 - the first and so far only speciation gene in mammals.[16]
Later in 2009 PRDM9 was identified as one of the fastest evolving genes in the genome.[9][17]
In 2010 three groups independently identified PRDM9 as controlling the positioning of recombination hotspots in humans and mice.[6][18][19][20][21]
in 2012 it was shown that almost all hotspots are positioned by PRDM9 and that in its absence hotspots form near promoters.[22]
In 2014 it was reported that the PRDM9 SET domain could also trimethylate H3K36 in vitro,[23] which was confirmed in vivo in 2016.[24]
In 2016 it was shown that the hybrid sterility caused by PRDM9 can be reversed and that the sterility is caused by asymmetric double strand breaks.[25][26]
Function in Recombination
PRDM9 mediates the process of meiosis by directing the sites of homologous recombination.[27] In humans and mice, recombination does not occur evenly throughout the genome but at particular sites along the chromosomes called recombination hotspots. Hotspots are regions of DNA about 1-2kb in length.[28] There are approximately 30,000 to 50,000 hotspots within the human genome corresponding to one for every 50-100kb DNA on average.[28] In humans, the average number of crossover recombination events per hotspot is one per 1,300 meioses, and the most extreme hotspot has a crossover frequency of one per 110 meioses.[28] These hotspots are binding sites for the PRDM9 Zinc Finger array.[29] Upon binding to DNA, PRDM9 catalyzes trimethylation of Histone 3 at lysine 4 and lysine 36.[30] As a result, local nucleosomes are reorganized and through an unknown mechanism the recombination machinery is recruited to form double strand breaks.
Notes
- ^ positive-regulatory domain
References
- ^ a b c GRCh38: Ensembl release 89: ENSG00000164256 – Ensembl, May 2017
- ^ a b c GRCm38: Ensembl release 89: ENSMUSG00000051977 – 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.
- ^ "Entrez Gene: PR domain containing 9".
- ^ S2CID 206525444.
- ^ "There are millions of different species worldwide. But how do new species first appear, and then remain separate?". royalsociety.org-gb. Retrieved 2017-12-10.
- PMID 21388701.
- ^ PMID 20041164.
- PMID 4452481.
- S2CID 4370624.
- PMID 24449848.
- PMID 2062643.
- PMID 22084420.
- S2CID 4412934.
- S2CID 1065925.
- PMID 19997497.
- PMID 20210982.
- PMID 20044541.
- PMID 20044539.
- PMID 20044538.
- PMID 22660327.
- PMID 24634223.
- PMID 27362481.
- PMID 26840484.
- PMID 26840487.
- PMID 21460839.
- ^ PMID 16856851.
- S2CID 195680901.
- PMID 27362481.
Further reading
- Baudat F, Buard J, Grey C, Fledel-Alon A, Ober C, Przeworski M, Coop G, de Massy B (February 2010). "PRDM9 is a major determinant of meiotic recombination hotspots in humans and mice". Science. 327 (5967): 836–40. PMID 20044539.
- Berg IL, Neumann R, Lam KW, Sarbajna S, Odenthal-Hesse L, May CA, Jeffreys AJ (October 2010). "PRDM9 variation strongly influences recombination hot-spot activity and meiotic instability in humans". Nature Genetics. 42 (10): 859–63. PMID 20818382.
- Irie S, Tsujimura A, Miyagawa Y, Ueda T, Matsuoka Y, Matsui Y, Okuyama A, Nishimune Y, Tanaka H (2009). "Single-nucleotide polymorphisms of the PRDM9 (MEISETZ) gene in patients with nonobstructive azoospermia". Journal of Andrology. 30 (4): 426–31. PMID 19168450.
- Sun XJ, Xu PF, Zhou T, Hu M, Fu CT, Zhang Y, Jin Y, Chen Y, Chen SJ, Huang QH, Liu TX, Chen Z (January 2008). "Genome-wide survey and developmental expression mapping of zebrafish SET domain-containing genes". PLOS ONE. 3 (1): e1499. PMID 18231586.
- Xiao B, Wilson JR, Gamblin SJ (December 2003). "SET domains and histone methylation". Current Opinion in Structural Biology. 13 (6): 699–705. PMID 14675547.
- Wahls WP, Swenson G, Moore PD (June 1991). "Two hypervariable minisatellite DNA binding proteins". Nucleic Acids Research. 19 (12): 3269–74. PMID 2062643.
- Jiang GL, Huang S (January 2000). "The yin-yang of PR-domain family genes in tumorigenesis". Histology and Histopathology. 15 (1): 109–17. PMID 10668202.
- Parvanov ED, Petkov PM, Paigen K (February 2010). "Prdm9 controls activation of mammalian recombination hotspots". Science. 327 (5967): 835. PMID 20044538.
- Myers S, Bowden R, Tumian A, Bontrop RE, Freeman C, MacFie TS, McVean G, Donnelly P (February 2010). "Drive against hotspot motifs in primates implicates the PRDM9 gene in meiotic recombination". Science. 327 (5967): 876–9. PMID 20044541.
- Miyamoto T, Koh E, Sakugawa N, Sato H, Hayashi H, Namiki M, Sengoku K (2008). "Two single nucleotide polymorphisms in PRDM9 (MEISETZ) gene may be a genetic risk factor for Japanese patients with azoospermia by meiotic arrest". Journal of Assisted Reproduction and Genetics. 25 (11–12): 553–7. PMID 18941885.
- Hussin J, Sinnett D, Casals F, Idaghdour Y, Bruat V, Saillour V, Healy J, Grenier JC, de Malliard T, Busche S, Spinella JF, Larivière M, Gibson G, Andersson A, Holmfeldt L, Ma J, Wei L, Zhang J, Andelfinger G, Downing JR, Mullighan CG, Awadalla P (March 2013). "Rare allelic forms of PRDM9 associated with childhood leukemogenesis". Genome Research. 23 (3): 419–30. PMID 23222848.
External links
- PRDM9+protein,+human at the U.S. National Library of Medicine Medical Subject Headings (MeSH)
- UCSC GenomeWiki - PRDM9: Meiosis and Recombination
This article incorporates text from the United States National Library of Medicine, which is in the public domain.