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Chromosome Dynamics Regulating Genomic Dispersion and Alteration of Nucleolus Organizer Regions (NORs). Cells 2020; 9:cells9040971. [PMID: 32326514 PMCID: PMC7227013 DOI: 10.3390/cells9040971] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Revised: 04/09/2020] [Accepted: 04/13/2020] [Indexed: 02/06/2023] Open
Abstract
The nucleolus organizer regions (NORs) demonstrate differences in genomic dispersion and transcriptional activity among all organisms. I postulate that such differences stem from distinct genomic structures and their interactions from chromosome observations using fluorescence in situ hybridization and silver nitrate staining methods. Examples in primates and Australian bulldog ants indicate that chromosomal features indeed play a significant role in determining the properties of NORs. In primates, rDNA arrays that are located on the short arm of acrocentrics frequently form reciprocal associations ("affinity"), but they lack such associations ("non-affinity") with other repeat arrays-a binary molecular effect. These "rules" of affinity vs. non-affinity are extrapolated from the chromosomal configurations of meiotic prophase. In bulldog ants, genomic dispersions of rDNA loci expand much more widely following an increase in the number of acrocentric chromosomes formed by centric fission. Affinity appears to be a significantly greater force: associations likely form among rDNA and heterochromatin arrays of acrocentrics-thus, more acrocentrics bring about more rDNA loci. The specific interactions among NOR-related genome structures remain unclear and require further investigation. Here, I propose that there are limited and non-limited genomic dispersion systems that result from genomic affinity rules, inducing specific chromosomal configurations that are related to NORs.
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Chen Y, Xu Y, Cao X, Zheng C, Lin L, Zhu Z, Hu J. Three patients with 46,X,inv(Y)(p11.2q11.2)pat/45,X and their pedigree analysis. Ann Hum Genet 2020; 84:331-338. [PMID: 32162681 PMCID: PMC7318165 DOI: 10.1111/ahg.12381] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Revised: 01/09/2020] [Accepted: 01/10/2020] [Indexed: 11/29/2022]
Abstract
The present study aimed to perform chromosome examination and pedigree analysis on three patients with semen abnormality who had undergone in vitro fertilization–embryo transfer (IVF‐ET). Peripheral blood cell culture and chromosome karyotyping were performed on 4,200 individuals who had undergone chromosome examination. Among them, 155 pregnant women who had successfully conceived were subjected to amniotic cell culture and chromosome karyotyping and those with abnormal chromosome karyotype were further subjected to C‐banding and whole‐genome sequencing. Mosaicism for a 46,X,inv(Y)(p11.2q11.2)pat/45,X karyotype was identified in the probands and immediate adult male relatives. The incidence of this mosaicism in the study population was only 0.07% (3/4,200), which is reported for the first time. For the proband of pedigree A, the results of whole‐genome sequencing and other tests were normal, and the chromosome karyotype of IVF fetuses was 46,X,inv(Y)(p11.2q11.2)pat. All the male members of three pedigrees have normal phenotypes, with no features of Turner's syndrome (45,X) or hermaphroditism (45,X/46,XY), suggesting that the inverted Y chromosome is extremely unstable and particularly susceptible to loss in somatic cells. So we speculate this karyotype may be a unique type of inverted Y chromosome in somatic cells.
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Affiliation(s)
- Yunchun Chen
- Department of Laboratory Medicine, Haikou Branch of Yue Yang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine (Haikou Hospital of Traditional Chinese Medicine), Hainan, Haikou, China
| | - Yuni Xu
- Department of Laboratory Medicine, Second Affiliated Hospital of Hainan Medical University, Hainan, Haikou, China
| | - Xiaoqiang Cao
- Department of Laboratory Medicine, Second Affiliated Hospital of Hainan Medical University, Hainan, Haikou, China
| | - Chunqiao Zheng
- Department of Laboratory Medicine, Second Affiliated Hospital of Hainan Medical University, Hainan, Haikou, China
| | - Liying Lin
- Department of Laboratory Medicine, Second Affiliated Hospital of Hainan Medical University, Hainan, Haikou, China
| | - Zhongyuan Zhu
- Department of Laboratory Medicine, Second Affiliated Hospital of Hainan Medical University, Hainan, Haikou, China
| | - Jiandong Hu
- Internal Medicine, Haikou Branch of Yue Yang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine (Haikou Hospital of Traditional Chinese Medicine), Hainan, Haikou, China
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Abstract
The great apes (orangutans, gorillas, chimpanzees, bonobos and humans) descended from a common ancestor around 13 million years ago, and since then their sex chromosomes have followed very different evolutionary paths. While great-ape X chromosomes are highly conserved, their Y chromosomes, reflecting the general lability and degeneration of this male-specific part of the genome since its early mammalian origin, have evolved rapidly both between and within species. Understanding great-ape Y chromosome structure, gene content and diversity would provide a valuable evolutionary context for the human Y, and would also illuminate sex-biased behaviours, and the effects of the evolutionary pressures exerted by different mating strategies on this male-specific part of the genome. High-quality Y-chromosome sequences are available for human and chimpanzee (and low-quality for gorilla). The chromosomes differ in size, sequence organisation and content, and while retaining a relatively stable set of ancestral single-copy genes, show considerable variation in content and copy number of ampliconic multi-copy genes. Studies of Y-chromosome diversity in other great apes are relatively undeveloped compared to those in humans, but have nevertheless provided insights into speciation, dispersal, and mating patterns. Future studies, including data from larger sample sizes of wild-born and geographically well-defined individuals, and full Y-chromosome sequences from bonobos, gorillas and orangutans, promise to further our understanding of population histories, male-biased behaviours, mutation processes, and the functions of Y-chromosomal genes.
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Jahan I, Hirai Y, Rahman ZMM, Islam MA, Hirai H. The first finding of chromosome variations in wild-born western hoolock gibbons. Primates 2013; 54:335-40. [DOI: 10.1007/s10329-013-0382-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2013] [Accepted: 08/02/2013] [Indexed: 12/23/2022]
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A ZZ/ZW microchromosome system in the spiny softshell turtle, Apalone spinifera, reveals an intriguing sex chromosome conservation in Trionychidae. Chromosome Res 2013; 21:137-47. [DOI: 10.1007/s10577-013-9343-2] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2013] [Revised: 02/19/2013] [Accepted: 02/21/2013] [Indexed: 12/22/2022]
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Greve G, Alechine E, Pasantes JJ, Hodler C, Rietschel W, Robinson TJ, Schempp W. Y-Chromosome variation in hominids: intraspecific variation is limited to the polygamous chimpanzee. PLoS One 2011; 6:e29311. [PMID: 22216243 PMCID: PMC3246485 DOI: 10.1371/journal.pone.0029311] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2011] [Accepted: 11/25/2011] [Indexed: 11/23/2022] Open
Abstract
Background We have previously demonstrated that the Y-specific ampliconic fertility genes DAZ (deleted in azoospermia) and CDY (chromodomain protein Y) varied with respect to copy number and position among chimpanzees (Pan troglodytes). In comparison, seven Y-chromosomal lineages of the bonobo (Pan paniscus), the chimpanzee's closest living relative, showed no variation. We extend our earlier comparative investigation to include an analysis of the intraspecific variation of these genes in gorillas (Gorilla gorilla) and orangutans (Pongo pygmaeus), and examine the resulting patterns in the light of the species' markedly different social and mating behaviors. Methodology/Principal Findings Fluorescence in situ hybridization analysis (FISH) of DAZ and CDY in 12 Y-chromosomal lineages of western lowland gorilla (G. gorilla gorilla) and a single lineage of the eastern lowland gorilla (G. beringei graueri) showed no variation among lineages. Similar findings were noted for the 10 Y-chromosomal lineages examined in the Bornean orangutan (Pongo pygmaeus), and 11 Y-chromosomal lineages of the Sumatran orangutan (P. abelii). We validated the contrasting DAZ and CDY patterns using quantitative real-time polymerase chain reaction (qPCR) in chimpanzee and bonobo. Conclusion/Significance High intraspecific variation in copy number and position of the DAZ and CDY genes is seen only in the chimpanzee. We hypothesize that this is best explained by sperm competition that results in the variant DAZ and CDY haplotypes detected in this species. In contrast, bonobos, gorillas and orangutans—species that are not subject to sperm competition—showed no intraspecific variation in DAZ and CDY suggesting that monoandry in gorillas, and preferential female mate choice in bonobos and orangutans, probably permitted the fixation of a single Y variant in each taxon. These data support the notion that the evolutionary history of a primate Y chromosome is not simply encrypted in its DNA sequences, but is also shaped by the social and behavioral circumstances under which the specific species has evolved.
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Affiliation(s)
- Gabriele Greve
- Institute of Human Genetics, University of Freiburg, Freiburg, Germany
| | - Evguenia Alechine
- Institute of Human Genetics, University of Freiburg, Freiburg, Germany
- Servicio de Huellas Digitales Genéticas, School of Pharmacy and Biochemistry, University of Buenos Aires, Buenos Aires, Argentina
| | - Juan J. Pasantes
- Institute of Human Genetics, University of Freiburg, Freiburg, Germany
- Department of Biochemistry, Genetics and Immunology, University of Vigo, Vigo, Spain
| | - Christine Hodler
- Institute of Human Genetics, University of Freiburg, Freiburg, Germany
| | | | - Terence J. Robinson
- Evolutionary Genomics Group, Department of Botany and Zoology, University of Stellenbosch, Stellenbosch, South Africa
| | - Werner Schempp
- Institute of Human Genetics, University of Freiburg, Freiburg, Germany
- * E-mail:
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Kirsch S, Münch C, Jiang Z, Cheng Z, Chen L, Batz C, Eichler EE, Schempp W. Evolutionary dynamics of segmental duplications from human Y-chromosomal euchromatin/heterochromatin transition regions. Genome Res 2008; 18:1030-42. [PMID: 18445620 DOI: 10.1101/gr.076711.108] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Human chromosomal regions enriched in segmental duplications are subject to extensive genomic reorganization. Such regions are particularly informative for illuminating the evolutionary history of a given chromosome. We have analyzed 866 kb of Y-chromosomal non-palindromic segmental duplications delineating four euchromatin/heterochromatin transition regions (Yp11.2/Yp11.1, Yq11.1/Yq11.21, Yq11.23/Yq12, and Yq12/PAR2). Several computational methods were applied to decipher the segmental duplication architecture and identify the ancestral origin of the 41 different duplicons. Combining computational and comparative FISH analysis, we reconstruct the evolutionary history of these regions. Our analysis indicates a continuous process of transposition of duplicated sequences onto the evolving higher primate Y chromosome, providing unique insights into the development of species-specific Y-chromosomal and autosomal duplicons. Phylogenetic sequence comparisons show that duplicons of the human Yp11.2/Yp11.1 region were already present in the macaque-human ancestor as multiple paralogs located predominantly in subtelomeric regions. In contrast, duplicons from the Yq11.1/Yq11.21, Yq11.23/Yq12, and Yq12/PAR2 regions show no evidence of duplication in rhesus macaque, but map to the pericentromeric regions in chimpanzee and human. This suggests an evolutionary shift in the direction of duplicative transposition events from subtelomeric in Old World monkeys to pericentromeric in the human/ape lineage. Extensive chromosomal relocation of autosomal-duplicated sequences from euchromatin/heterochromatin transition regions to interstitial regions as demonstrated on the pygmy chimpanzee Y chromosome support a model in which substantial reorganization and amplification of duplicated sequences may contribute to speciation.
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Affiliation(s)
- Stefan Kirsch
- Institute of Human Genetics, University of Freiburg, 79106 Freiburg, Germany
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Wimmer R, Kirsch S, Rappold GA, Schempp W. The evolution of the azoospermia factor region AZFa in higher primates. Cytogenet Genome Res 2004; 108:211-6. [PMID: 15545732 DOI: 10.1159/000080818] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2003] [Accepted: 12/08/2003] [Indexed: 11/19/2022] Open
Abstract
Clones of a PAC contig encompassing the human AZFa region in Yq11.21 were comparatively FISH mapped to great ape Y chromosomes. While the orthologous AZFa locus in the chimpanzee, the bonobo and the gorilla maps to the long arm of their Y chromosomes in Yq12.1-->q12.2, Yq13.1-->q13.2 and Yq11.2, respectively, it is found on the short arm of the orang-utan subspecies of Borneo and Sumatra, in Yp12.3 and Yp13.2, respectively. Regarding the order of PAC clones and genes within the AZFa region, no differences could be detected between apes and man, indicating a strong evolutionary stability of this non-recombining region.
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Affiliation(s)
- R Wimmer
- Institute of Human Genetics and Anthropology, University of Freiburg, Germany
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Tsend-Ayush E, Grützner F, Yue Y, Grossmann B, Hänsel U, Sudbrak R, Haaf T. Plasticity of human chromosome 3 during primate evolution. Genomics 2004; 83:193-202. [PMID: 14706448 DOI: 10.1016/j.ygeno.2003.08.012] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Comparative mapping of more than 100 region-specific clones from human chromosome 3 in Bornean and Sumatran orangutans, siamang gibbon, and Old and New World monkeys allowed us to reconstruct ancestral simian and hominoid chromosomes. A single paracentric inversion derives chromosome 1 of the Old World monkey Presbytis cristata from the simian ancestor. In the New World monkey Callithrix geoffroyi and siamang, the ancestor diverged on multiple chromosomes, through utilizing different breakpoints. One shared and two independent inversions derive Bornean orangutan 2 and human 3, implying that neither Bornean orangutans nor humans have conserved the ancestral chromosome form. The inversions, fissions, and translocations in the five species analyzed involve at least 14 different evolutionary breakpoints along the entire length of human 3; however, particular regions appear to be more susceptible to chromosome reshuffling. The ancestral pericentromeric region has promoted both large-scale and micro-rearrangements. Small segments homologous to human 3q11.2 and 3q21.2 were repositioned intrachromosomally independent of the surrounding markers in the orangutan lineage. Breakage and rearrangement of the human 3p12.3 region were associated with extensive intragenomic duplications at multiple orangutan and gibbon subtelomeric sites. We propose that new chromosomes and genomes arise through large-scale rearrangements of evolutionarily conserved genomic building blocks and additional duplication, amplification, and/or repositioning of inherently unstable smaller DNA segments contained within them.
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Affiliation(s)
- Enkhjargal Tsend-Ayush
- Comparative Genomics Group, Research School of Biological Sciences, Australian National University, Canberra ACT 2601, Australia
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Gläser B, Grützner F, Willmann U, Stanyon R, Arnold N, Taylor K, Rietschel W, Zeitler S, Toder R, Schempp W. Simian Y chromosomes: species-specific rearrangements of DAZ, RBM, and TSPY versus contiguity of PAR and SRY. Mamm Genome 1998; 9:226-31. [PMID: 9501307 DOI: 10.1007/s003359900730] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The three human male specific expressed gene families DAZ, RBM, and TSPY are known to be repetitively clustered in the Y-specific region of the human Y Chromosome (Chr). RBM and TSPY are Y-specifically conserved in simians, whereas DAZ cannot be detected on the Y chromosomes of New World monkeys. The proximity of SRY to the pseudoautosomal region (PAR) is highly conserved and thus most effectively stabilizes the pseudoautosomal boundary on the Y (PABY) in simians. In contrast, the non-recombining part of the Y Chrs, including DAZ, RBM, and TSPY, was exposed to species-specific amplifications, diversifications, and rearrangements. Evolutionary fast fixation of any of these variations was possible as long as they did not interfere with male fertility.
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Affiliation(s)
- B Gläser
- Institute of Human Genetics and Anthropology, University of Freiburg, Germany
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Gläser B, Grützner F, Taylor K, Schiebel K, Meroni G, Tsioupra K, Pasantes J, Rietschel W, Toder R, Willmann U, Zeitler S, Yen P, Ballabio A, Rappold G, Schempp W. Comparative mapping of Xp22 genes in hominoids--evolutionary linear instability of their Y homologues. Chromosome Res 1997; 5:167-76. [PMID: 9246409 DOI: 10.1023/a:1018490713273] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Several genes located within or proximal to the human PAR in Xp22 have homologues on the Y chromosome and escape, or partly escape, inactivation. To study the evolution of Xp22 genes and their Y homologues, we applied multicolour fluorescence in situ hybridization (FISH) to comparatively map DNA probes for the genes ANT3, XG, ARSD, ARSE (CDPX), PRK, STS, KAL and AMEL to prometaphase chromosomes of the human species and hominoid apes. We demonstrate that the genes residing proximal to the PAR have a highly conserved order on the higher primate X chromosomes but show considerable rearrangements on the Y chromosomes of hominoids. These rearrangements cannot be traced back to a simple model involving only a single or a few evolutionary events. The linear instability of the Y chromosomes gives some insight into the evolutionary isolation of large parts of the Y chromosomes and thus might reflect the isolated evolutionary history of the primate species over millions of years.
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Affiliation(s)
- B Gläser
- Institute of Human Genetics and Anthropology, University of Freiburg, Germany
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Xu X, Arnason U. The mitochondrial DNA molecule of Sumatran orangutan and a molecular proposal for two (Bornean and Sumatran) species of orangutan. J Mol Evol 1996; 43:431-7. [PMID: 8875856 DOI: 10.1007/bf02337514] [Citation(s) in RCA: 80] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
The complete mitochondrial DNA (mtDNA) molecule of Sumatran orangutan, plus the complete mitochondrial control region of another Sumatran specimen and the control regions and five protein-coding genes of two specimens of Bornean orangutan were sequenced and compared with a previously reported complete mtDNA of Bornean orangutan. The two orangutans are presently separated at the subspecies level. Comparison with five different species pairs-namely, harbor seal/grey seal, horse/donkey, fin whale/blue whale, common chimpanzee/pygmy chimpanzee, and Homo/common chimpanzee-showed that the molecular difference between Sumatran and Bornean orangutan is much greater than that between the seals, and greater than that between the two chimpanzees, but similar to that between the horse and the donkey and the fin and blue whales. Considering their limited morphological distinction the comparison revealed unexpectedly great molecular difference between the two orangutans. The nucleotide difference between the orangutans is about 75% of that between Homo and the common chimpanzee, whereas the amino acid difference exceeds that between Homo and the common chimpanzee. On the basis of their molecular distinction we propose that the two orangutans should be recognized as different species, Pongo pygmaeus, Bornean orangutan, and P. abelii, Sumatran orangutan.
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Affiliation(s)
- X Xu
- Division of Evolutionary Molecular Systematics, University of Lund, Sölvegatan 29, S-223 62 Lund, Sweden
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Schempp W, Binkele A, Arnemann J, Gläser B, Ma K, Taylor K, Toder R, Wolfe J, Zeitler S, Chandley AC. Comparative mapping of YRRM- and TSPY-related cosmids in man and hominoid apes. Chromosome Res 1995; 3:227-34. [PMID: 7606360 DOI: 10.1007/bf00713047] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Using chromosomal in situ hybridization it has been demonstrated that specific members of the YRRM and the TSPY families are multicopy and Y chromosome specific in hominoids. After hybridization with the YRRM-related cosmid A5F and the TSPY-related cosmids cos36 and cY91, a reverse and complementary pattern of main and secondary signals is detected on the Y chromosomes of the human, the pygmy chimpanzee and the gorilla, while the location of signals coincides on the Y chromosomes of the chimpanzee, both orang-utan subspecies and the white hand gibbon. This complementary distribution of YRRM and TSPY sequences on the hominoid Y chromosomes possibly originates from a similar sequence motif that is shared by and evolutionarily conserved between certain members of both gene families and/or repeated elements flanking those genes. Otherwise this complementary distribution could go back to a common organization of these genes next to each other on an ancient Y chromosome which was disrupted by chromosomal rearrangements and amplification of one or other of the genes at each of the locations.
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Affiliation(s)
- W Schempp
- Institute of Human Genetics and Anthropology, University of Freiburg, Germany
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Toder R, Zeitler S, Goodfellow PN, Schempp W. Comparative mapping of SRY in the great apes. Chromosome Res 1993; 1:117-20. [PMID: 8143095 DOI: 10.1007/bf00710034] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Cytogenetic studies of the primate Y chromosomes have suggested that extensive rearrangements have occurred during evolution of the great apes. We have used in situ hybridization to define these rearrangements at the molecular level. pHU-14, a probe including sequences from the sex determining gene SRY, hybridizes close to the early replicating pseudoautosomal segment in a telomeric or subtelomeric position of the Y chromosomes of all great apes. The low copy repeat detected by the probe Fr35-II is obviously included in Y chromosomal rearrangements during hominid evolution. These results, combined with previous studies, suggest that the Y chromosome in great apes has a conserved region including the pseudoautosomal region and the testis-determining region. The rest of the Y chromosome has undergone several rearrangements in the different great apes.
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Affiliation(s)
- R Toder
- Institut für Humangenetik und Anthropologie, Universität Freiburg, Germany
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