Chromosomal evolution of the PKD1 gene family in primates
© Kirsch et al; licensee BioMed Central Ltd. 2008
Received: 11 December 2007
Accepted: 26 September 2008
Published: 26 September 2008
The autosomal dominant polycystic kidney disease (ADPKD) is mostly caused by mutations in the PKD1 (polycystic kidney disease 1) gene located in 16p13.3. Moreover, there are six pseudogenes of PKD1 that are located proximal to the master gene in 16p13.1. In contrast, no pseudogene could be detected in the mouse genome, only a single copy gene on chromosome 17. The question arises how the human situation originated phylogenetically. To address this question we applied comparative FISH-mapping of a human PKD1-containing genomic BAC clone and a PKD1-cDNA clone to chromosomes of a variety of primate species and the dog as a non-primate outgroup species.
Comparative FISH with the PKD1-cDNA clone clearly shows that in all primate species studied distinct single signals map in subtelomeric chromosomal positions orthologous to the short arm of human chromosome 16 harbouring the master PKD1 gene. Only in human and African great apes, but not in orangutan, FISH with both BAC and cDNA clones reveals additional signal clusters located proximal of and clearly separated from the PKD1 master genes indicating the chromosomal position of PKD1 pseudogenes in 16p of these species, respectively. Indeed, this is in accordance with sequencing data in human, chimpanzee and orangutan. Apart from the master PKD1 gene, six pseudogenes are identified in both, human and chimpanzee, while only a single-copy gene is present in the whole-genome sequence of orangutan. The phylogenetic reconstruction of the PKD1-tree reveals that all human pseudogenes are closely related to the human PKD1 gene, and all chimpanzee pseudogenes are closely related to the chimpanzee PKD1 gene. However, our statistical analyses provide strong indication that gene conversion events may have occurred within the PKD1 family members of human and chimpanzee, respectively.
PKD1 must have undergone amplification very recently in hominid evolution. Duplicative transposition of the PKD1 gene and further amplification and evolution of the PKD1 pseudogenes may have arisen in a common ancestor of Homo, Pan and Gorilla ~8 MYA. Reticulate evolutionary processes such as gene conversion and non-allelic homologous recombination (NAHR) may have resulted in concerted evolution of PKD1 family members in human and chimpanzee and, thus, simulate an independent evolution of the PKD1 pseudogenes from their master PKD1 genes in human and chimpanzee.
Autosomal dominant polycystic kidney disease (ADPKD) is a late onset systemic disorder characterised by the progressive development of multiple fluid filled cysts in the kidney, ultimately leading to renal failure . Peters and Sandkuijl  estimated that in affected individuals of European descent approximately 85% of ADPKD is due to mutations in the gene PKD1 (polycystic kidney disease 1), located on chromosome 16p13.3. About 50 kb of the PKD1 region in 16p13.3 is inserted and reiterated in several copies in 16p13.1, comprising six pseudogenes [3–5]. Only 3.5 kb of the PKD1 transcript, located at the 3'end of the gene, is unique to PKD1 . In contrast to the human situation there is only one Pkd1 gene on mouse chromosome 17 and no further pseudogenes could be detected . The question arose how the human situation originated phylogenetically. Besides single-base-pair mutations, sequence duplications and chromosomal rearrangements are the primary forces by which any genome evolves over time [8, 9]. Various models of genomic duplications, e.g. the duplicative transposition or the endoduplication, have been documented. The duplicative transposition of a genomic block of material (1–100 kb) leads to segmental duplications within a chromosome/genome , which are also known as low copy repeat sequences, that mediate recurrent chromosomal structural rearrangements . These segmental duplications are often harbouring a part of a gene containing intron and exon structures, which leads to the accumulation of unprocessed pseudogenes. Such duplications appear to have arisen in very recent evolutionary time (during the last 35 Myr), as judged by the high sequence identity (90–100%) seen both in introns and exons [4, 9]. Interestingly, human chromosome 16 is one of the most enriched chromosomes for segmental duplications. They are particularly clustered along the p arm of the chromosome . In contrast to duplicative transpositions, endoduplications originate from tandem duplication events of local chromosomal regions mediated by unequal crossover. In the case of PKD1 both models of genomic duplications can be implicated. First, the duplicative transposition as a hallmark for the separation of the pseudogenes from the PKD1 gene and second, the endoduplication among the pseudogenes as some of them are located next to each other in the same orientation, indicating a tandem duplication event [3, 11].
Fluorescence in situ hybridization (FISH) is the main physical mapping tool to identify chromosomal rearrangements among closely related species . Therefore we applied comparative FISH-mapping of a human PKD1-containing BAC clone and a PKD1-cDNA clone to chromosomes of human, great apes, gibbon, Old World and New World monkeys, lemurs and the dog as a non-primate outgroup species. Here we report the localization of the PKD1 gene and its pseudogenes. Moreover, with the advent of whole-genome sequencing, a highly accurate human genome sequence  and draft sequences of the chimpanzee , the orangutan , the rhesus macaque  and the common marmoset  genome have been generated. This offers the possibility for phylogenetic and comparative analyses of human and chimpanzee sequences of PKD1 genes and pseudogenes taking the rhesus macaque as an outgroup.
Blood samples of chimpanzee (Pan troglodytes, PTR), pygmy chimpanzee (Pan paniscus, PPA), lowland gorilla (Gorilla gorilla gorilla, GGO), Sumatran orangutan (Pongo pygmaeus abelii, PPYsu), and Bornean orangutan (Pongo pygmaeus pygmaeus, PPYbo) were obtained from the Zoologisch-Botanischer Garten Wilhelma in Stuttgart, Germany, the Zoologischer Garten Berlin, Germany, and the Zoologischer Garten Leipzig, Germany. Blood samples of the lar gibbon (Hylobates lar, HLA), the proboscis monkey (Nasalis larvatus, NLA), and the black-handed spider monkey (Ateles geoffroyi, AGE) were also obtained from the Zoologisch-Botanischer Garten Wilhelma in Stuttgart, Germany. Blood probes of the Mueller's or grey gibbon (Hylobates muelleri, HMU), the rhesus macaque (Macaca mulatta, MMU), the pig-tailed macaque (Macaca nemestrina, MNE), and the ring-tailed lemur (Lemur catta, LCA) were received from the Zoologischer Garten Münster, Germany, the Zoologischer Garten Antwerpen, Belgium, and the Deutsches Primatenzentrum in Göttingen, Germany. From Prof. Dr. Y. Rumpler in Strasbourgh, France, we received blood samples from the ring-tailed lemur (Lemur catta, LCA), and the brown lemur (Eulemur fulvus, EFU). Blood probes from the domestic dog (Canis lupus f. familiaris, CFA) we got from Dr. R. Stanyon in Firenze, Italy.
Standard chromosome preparation methods were applied to peripheral lymphocyte cultures of human, primates and the domestic dog .
Fluorescence in situ hybridization (FISH)
Prior to FISH, the slides were treated with RNase followed by pepsin digestion as described in . FISH followed essentially the methods already described in . Chromosome in situ suppression was applied to the probes BAC RP11-304L19 (Ensembl release 47: [AC009065]; Chr 16: 2,081,103 – 2,267,413) which harbours the complete PKD1 gene and several additional genes. The BAC was originally purchased from Research Genetics, Inc., (Huntsville, Ala, USA now Invitrogen GmbH, Germany) and a 6.5 kb long partial PKD1-cDNA clone covering the exons 15–31 of the PKD1 gene (generously provided by Peter Harris; Division of Nephrology and Hypertension, Mayo Clinic College of Medicine, Rochester, MN, USA). In our FISH-experiments BAC clone RP11-304L19 was referred to as "BAC", the PKD1-cDNA clone as "cDNA". After FISH the slides were counterstained with DAPI (0.14 μg/ml) and mounted in Vectashield (Vector Laboratories).
Fluorescence microscopy and imaging
Preparations were evaluated using a Zeiss Axiophot epifluorescence microscope equipped with single-band pass filters for excitation of red, green and blue (Chroma Technologies, Brattleboro, VT). During exposures, only excitation filters were changed allowing for pixel-shift-free image recording. Images of high magnification and resolution were obtained using a black-and-white CCD camera (Photometrics Kodak KAF 1400; Tucson, AZ) connected to the Axiophot. Camera control and digital image acquisition involved the use of an Apple Macintosh Quadra 950 computer.
Sequence conservation analyses
Sequences orthologous to human PKD1 intron 30 were identified in the whole genome assemblies of the rat (rn4), mouse (NCBI Build 37; mm9), cat (felCat3), dog (canFam2), horse (equCab1), and opossum (monDom4) by using human intron 30 anchored with flanking exons as a query sequence. All mammalian sequences were extracted and multiple sequence alignments carried out using CLUSTALW 2.0 . Pairwise identities for intron 30 were calculated directly from the CLUSTALW alignments.
Human sequences paralogous to the human PKD1 master gene genomic locus (NC_000016: bp 2,078,712 – 2,125,900) were obtained from GenBank as follows: PKD1P1: NG_002797; PKD1P2: NG_002795; PKD1P3: NG_002796; PKD1P4: NG_002800; PKD1P5: NG_002798; PKD1P6: NG_002799. Phylogenetic analysis was focused on the largest intron (> 1.5 kb) common for all gene loci (intron 30). Subsequently, primate sequences orthologous and paralogous to the human intron 30 sequence were identified in the whole genome sequence assemblies of the chimpanzee (panTro2), orangutan (ponAbe2), and rhesus macaque (rheMac2). Sequences were extracted, multiple sequence alignments generated using CLUSTALW 2.0  and gap-containing positions removed. Pairwise identities of all sequences were based on the CLUSTALW alignments. MODELTEST  was used to select the model of nucleotide substitution best fitting the sequences. The nucleotide sequence phylogeny was built using an ML model for nucleotide data with the parameters defined by MODELTEST (PAUP* 4.0; ). The PKD1 intron 30 topology was initially assessed using parsimony and distance-related nonparametric bootstrapping. No topological differences were noted for the nucleotide phylogenies.
Dnaml analysis of matched pairs of human/chimpanzee genes/pseudogenes
Branching point to
Approx. Confidence limits
0.00553 0.02032 **
0.00603 0.02124 **
0.00462 0.01719 **
0.00488 0.01753 **
0.00297 0.01430 **
0.00526 0.01820 **
0.00333 0.01641 **
0.02301 0.04728 **
0.00241 0.01347 **
0.00769 0.02250 **
0.00106 0.01102 **
0.00653 0.02132 **
0.00597 0.01937 **
0.00572 0.01887 **
Human and chimpanzee PKD1 intron 30 sequences were further analyzed using GENECONV 1.81 . Fragments shared by a pair of DNA sequences in a multiple alignment presenting more consecutive identical polymorphic sites in common than expected by chance are identified. Evidence for gene conversion is indicated when a fragment had a p-value less than 0.05 after multiple correction of the p-values.
The chromosomal location of PKD1 sequences was defined by applying one- and two-colour fluorescence in situ hybridisation (FISH) of two human-derived probes, the PKD1-containing BAC clone RP11-304L19 and the PKD1-cDNA clone HG 31918N2, to prometaphase or metaphase chromosomes of human, great apes, gibbon, Old World and New World monkeys, lemurs and the dog as a non-primate outgroup species. During our search for PKD1 sequences in primates and one representative of the carnivores, the orthologous regions to the human short arm chromosome 16 could be identified with the assistance of several published chromosomal painting papers. Presenting our comparative FISH-results in human and great apes we applied the system of orthologous numbering of human and great ape chromosomes .
Comparative mapping in human and great apes
For both chimpanzee and bonobo chromosomes 16 identical FISH-results were obtained. Three clearly separated PKD1-signals could be detected with the BAC clone, showing a strong PKD1-signal in distal 16p15, weaker signals in proximal 16p15 and a third distinct signal in 16p13, distal to the short arm heterochromatin (Fig. 1d+f). Detection with the cDNA clone could confirm these three localizations, but showed weaker PKD1-signals in distal 16p15 (Fig. 1e+f). According to our results the DAPI-bright heterochromatin of both the chimpanzee and the bonobo chromosome 16 maps to the proximal short arm on the side of the PKD1-signals, but not to the proximal long arm as presented in the ideogrammatic drawing in ISCN . Indeed, this pericentric inversion bringing the DAPI-bright heterochromatin to the proximal short arm of chimpanzee chromosome 16 was recently established by means of molecular breakpoint analysis .
A different situation is given for the chromosome 16 of the orangutan subspecies from Sumatra. Our FISH results obtained with the BAC clone revealed strong PKD1-signals in distal 16p14 (Fig. 2d+f). Hybridizations with the cDNA clone confirmed this result, however, weaker PKD1-signals were detected (Fig. 2e+f). The same results we achieved for the Bornean orangutan (data not shown).
Comparative mapping in gibbons and Old World monkeys
Comparative mapping in a New World monkey, lemurs and the dog
Comparative sequence and phylogenetic analyses
Based on the current genome reference sequence assemblies of human (NCBI build 36.3), chimpanzee (panTro2), orangutan (ponAbe2), rhesus macaque (rheMac2), and common marmoset (calJac1) we identified the master gene and 6 pseudogenes for PKD1 in human (HSA PKD1P1-P6) and chimpanzee (PTR PKD1P1 [NW_001226536], PTR PKD1P2 [NW_001225854], PTR PKD1P3 [NW_001225858], PTR PKD1P4 [NW_001226562], PTR PKD1P5 [NW_001225880], PTR PKD1P6 [NW_001226561]), respectively, while only a single-copy PKD1 gene was present in orangutan, rhesus macaque and common marmoset. Pairwise sequence comparisons of all pseudogene copies with the corresponding master gene revealed intron 30 as the longest stretch (> 1.5 kb) of non-coding DNA present in all genes/pseudogenes. It was previously shown that intron 45 of the PKD1 master gene shows a remarkable sequence conservation . To assess the sequence conservation of intron 30, we performed multiple pairwise sequence comparisons of sequences orthologous to human intron 30 from six mammalian species (mouse, rat, cat, dog, human, opossum). Except for the mouse-rat pairwise alignment (83% nucleotide sequence identity), all other percent identities ranged from 45% to 56% indicating no sequence conservation. To analyze the phylogenetic relationships of master genes and pseudogenes, we compared all intron 30 sequences by carrying out a CLUSTALW alignment. Irrespective of the model of nucleotide substitution determined by MODELTEST  and the criteria used to analyze the sequence data in PAUP*4.0b , phylogenetic reconstruction of PKD1 using intron 30 always indicated that all human pseudogenes are closely related to the human PKD1 gene, and all chimpanzee pseudogenes are closely related to the chimpanzee PKD1 gene (Additional File 1). From an evolutionary point of view, and also with regard to our FISH results in human and great apes, it seems very unlikely that PKD1 pseudogenes originated independently in human and chimpanzee lineages. In addition, bearing in mind previous reports on pseudogene-mediated gene conversion to PKD1 [37–39], this prompted us to search for indications of concerted evolution in the PKD1 family members in human and chimpanzee.
Indications for concerted evolution
In a first approach we made use of the phylogenetic tree of PKD1 intron 30 rooted on the rhesus macaque (Additional File 1). Based on the topology of this tree we matched seven pairs of orthologous PKD1-loci from human and chimpanzee (Table 1). Seven phylograms independently created with the PKD1 master genes of orangutan and rhesus macaque together with one pair of orthologous PKD1 loci from human and chimpanzee showed for all PKD1 loci, with the exception of human PKD1P3, almost identical branch lengths (expected number of nucleotide substitutions/site) of 0.020–0.027. This indicates that these pseudogenes may have originated before the human and chimpanzee lineages diverged.
Subsequently, we calculated the pairwise nucleotide sequence identities among all pseudogenes and the master genes of human, chimp, orangutan and rhesus macaque (Additional file 2).
In general, the human paralogous pseudogenes as well as the chimpanzee paralogous pseudogenes are more closely related among each other, respectively, than are the orthologous PKD1 master genes of both species. As reviewed in Chen et al.  this result is a clear indication that gene conversion may have occurred among PKD1 pseudogenes in human and chimpanzee, respectively.
In addition, the human and chimpanzee PKD1 intron 30 sequences were scanned for potential recombinant sequences by GENECONV analysis, which is a well-established method for detecting partial gene conversion . In human, four DNA-fragments ranging in size from 522 bp to 637 bp were identified which are significantly more similar to each other than would be expected by chance, even after correction for multiple testing (Additional file 2). Thus, GENECONV indicates partial gene conversion between human PKD1 pseudogenes P2 and P3, P1 and P4, P3 and P4, as well as P1 and P2, respectively. Surprisingly, in the chimpanzee, a gene conversion between the PKD1 master gene and pseudogene 2 is indicated (Additional file 3).
Taken together, our three-pronged approach yielded substantial evidence for, at least, concerted evolution between PKD1 pseudogene copies in human.
Discussion and conclusion
We applied comparative FISH-mapping with two human derived probes, the PKD1-containing genomic BAC clone RP11-304L19 and the PKD1-cDNA clone HG 31918N2, to localize PKD1-sequences on chromosomes of a variety of primates, including humans, and the dog as a non-primate outgroup-species.
Interestingly, in both orangutan subspecies from Sumatra and Borneo, and in all phylogenetically more distant species investigated only single PKD1-signals were detected at chromosomal sites orthologous to human chromosome 16. Thus, we may infer a single-copy PKD1 gene for all these species. Indeed, only a single PKD1 gene is present in the current genome sequence assembly of the orangutan , the rhesus macaque , and the common marmoset . Due to the limited resolution of the FISH-technique we cannot exclude a duplication/amplification of PKD1 at the chromosomal signal sites of the other primates investigated.
In conclusion, with regard to our comparative FISH-data it seems very likely, that the original duplication of the PKD1 gene and further amplification and evolution of the PKD1 pseudogenes may have occurred in a common ancestor of Homo, Pan and Gorilla ~8MYA.
Our combinatorial phylogenetic tree analysis using intron 30 from human and chimpanzee PKD1-loci, with orangutan and macaque as outgroup species, raises the impression of an independent evolution of the PKD1 pseudogenes from their master PKD1 genes in human and chimpanzee (Additional File 1). However, it should be noted that a complex genome architecture with all PKD1 pseudogenes being embedded in segmental duplications has been documented for the short arm of human  and chimpanzee  chromosome 16. Indeed, several studies have shown that reticulate evolutionary processes, such as nonallelic homologous recombination (NAHR) and gene conversion occur within specific duplicon families, and molecular clock analysis and calculations based on sequence comparisons are confounded by these processes [40, 44–46]. Interestingly, there are several reports presenting evidence that mutations in human PKD1 are caused via pseudogene-mediated gene conversion leading to ADPKD [37, 39], . Our own statistical analyses provided clear indications for gene conversion and/or NAHR that may have occurred among PKD1 family members in human and chimpanzee, respectively. One further aspect to be considered is the use of intron 30 for our sequence analysis and phylogenetic tree building. Our decision to focus on intron 30 was directed by the fact that the PKD1 exons are densely packed on the genomic level and intron 30 is the largest intron (> 1.5 kb) present in all PKD1 loci in human and chimpanzee, respectively. On the other hand, the evolutionarily highly conserved last intron (intron 45) of PKD1  raises the question of whether there are other forces affecting intron 30 evolution. However, we did not find evidence of high sequence conservation in intron 30.
In conclusion, notwithstanding our results using intron 30 for phylogenetic tree building, it seems more likely that all six PKD1-pseudogenes evolved in a common ancestor of human and chimpanzee. After separation of both lineages there was internal correction of the genes/pseudogenes resulting in co-evolution of these genes within each species. By inference from an equally complex FISH-signal pattern of PKD1 shown in gorilla 16p, the species gorilla may well be included in this scenario of PKD1 evolution, suggesting that the original duplication of PKD1 may have occurred before gorillas and humans diverged ~8MYA.
autosomal dominant polycystic kidney disease
bacterial artificial chromosome
Fluorescence in situ hybridization
International system for human cytogenetic nomenclature
million years ago
non-allelic homologous recombination
- PKD1 :
polycystic kidney disease 1.
Supported by grants of the Deutsche Forschungsgemeinschaft Sche 214/8-1
- Gabow PA: Autosomal dominant polycystic kidney disease: more than a renal disease. Am J Kidney Dis. 1990, 16: 403-413.View ArticlePubMedGoogle Scholar
- Peters DJM, Sandkuijl LA: Genetic heterogeneity of polycystic kidney disease in Europe. Contribution to Nephrology 97: Polycystic Kidney Disease". Edited by: Breuning MH, Devoto M, Romeo G. 1992, Basel: Karger, 128-139.View ArticleGoogle Scholar
- Bogdanova N, Markoff A, Gerke V, McClusky M, Horst J, Dworniczak B: Homologous to the first gene for autosomal dominant polycystic kidney disease are pseudogenes. Genomics. 2001, 74: 333-341. 10.1006/geno.2001.6568.View ArticlePubMedGoogle Scholar
- The International Human Genome Sequencing Consortium: Finishing the euchromatic sequence of the human genome. Nature. 2004, 431: 931-945. 10.1038/nature03001.View ArticleGoogle Scholar
- Martin J, Han C, Gordon LA, Terry A, Prabhakar S, She X, Xie G, Hellsten U, Chan YM, Altherr M, Couronne O, Aerts A, Bajorek E, Black S, Blumer H, Branscomb E, Brown NC, Bruno WJ, Buckingham JM, Callen DF, Campbell CS, Campbell ML, Campbell EW, Caoile C, Challacombe JF, Chasteen LA, Chertkov O, Chi HC, Christensen M, Clark LM, Cohn JD, Denys M, Detter JC, Dickson M, Dimitrijevic-Bussod M, Escobar J, Fawcett JJ, Flowers D, Fotopulos D, Glavina T, Gomez M, Gonzales E, Goodstein D, Goodwin LA, Grady DL, Grigoriev I, Groza M, Hammon N, Hawkins T, Haydu L, Hildebrand CE, Huang W, Israni S, Jett J, Jewett PB, Kadner K, Kimball H, Kobayashi A, Krawczyk MC, Leyba T, Longmire JL, Lopez F, Lou Y, Lowry S, Ludeman T, Manohar CF, Mark GA, McMurray KL, Meincke LJ, Morgan J, Moyzis RK, Mundt MO, Munk AC, Nandkeshwar RD, Pitluck S, Pollard M, Predki P, Parson-Quintana B, Ramirez L, Rash S, Retterer J, Ricke DO, Robinson DL, Rodriguez A, Salamov A, Saunders EH, Scott D, Shough T, Stallings RL, Stalvey M, Sutherland RD, Tapia R, Tesmer JG, Thayer N, Thompson LS, Tice H, Torney DC, Tran-Gyamfi M, Tsai M, Ulanovsky LE, Ustaszewska A, Vo N, White PS, Williams AL, Wills PL, Wu JR, Wu K, Yang J, Dejong P, Bruce D, Doggett NA, Deaven L, Schmutz J, Grimwood J, Richardson P, Rokhsar DS, Eichler EE, Gilna P, Lucas SM, Myers RM, Rubin EM, Pennacchio LA: The sequence and analysis of duplication-rich human chromosome 16. Nature. 2004, 432: 988-994. 10.1038/nature03187.View ArticlePubMedGoogle Scholar
- The European Polycystic Kidney Disease Consortium: The polycystic kidney disease 1 gene encodes a 14 kb transcript and lies within a duplicated region on chromosome 16. Cell. 1994, 77: 881-894. 10.1016/0092-8674(94)90137-6.View ArticleGoogle Scholar
- Olsson PG, Löhning C, Horsley S, Jearney L, Harris PC, Frischauf AM: The mouse homologue of the polycystic kidney disease gene (Pkd1) is a single-copy gene. Genomics. 1996, 34: 233-235. 10.1006/geno.1996.0273.View ArticlePubMedGoogle Scholar
- Ohno S: Evolution by gene duplication. 1970, New York: SpringerView ArticleGoogle Scholar
- Samonte RV, Eichler EE: Segmental duplications and the evolution of the primate genome. Nature Rev Genet. 2002, 3: 65-72. 10.1038/nrg705.View ArticlePubMedGoogle Scholar
- Eichler EE: Recent duplication, domain accretion and the dynamic mutation of the human genome. Trends Genet. 2001, 17: 661-669. 10.1016/S0168-9525(01)02492-1.View ArticlePubMedGoogle Scholar
- Loftus BJ, Kim UJ, Sneddon VP, Kalush F, Brandon R, Fuhrmann J, Mason T, Crosby ML, Barnstead M, Cronin L, Deslattes Mays A, Cao Y, Xu RX, Kang HL, Mitchell S, Eichler EE, Harris PC, Venter JC, Adams MD: Genome duplications and other features in 12 Mb of DNA sequence from human chromosome 16p and 16q. Genomics. 1999, 60: 295-308. 10.1006/geno.1999.5927.View ArticlePubMedGoogle Scholar
- The Chimpanzee Sequencing and Analysis Consortium: Initial sequence of the chimpanzee genome and comparison with the human genome. Nature. 2005, 437: 69-87. 10.1038/nature04072.View ArticleGoogle Scholar
- Jul. 2007 Pongo pygmaeus abelii (ponAbe2) draft assembly. [http://genome.wustl.edu/pub/organism/Primates/Pongo_pygmaeus_abelii/assembly/Pongo_pygmaeus_abelii-2.0.2/]
- The Rhesus Macaque Genome Sequencing and Analysis Consortium: Evolutionary and biomedical insights from the rhesus macaque genome. Science. 2007, 316: 222-234. 10.1126/science.1139247.View ArticleGoogle Scholar
- Jun. 2007 Callithrix jacchus (calJac1) draft assembly. [http://genome.wustl.edu/pub/organism/Primates/Callithrix_jacchus/assembly/Callithrix_jacchus-2.0.2/]
- 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: 227-234. 10.1007/BF00713047.View ArticlePubMedGoogle Scholar
- Ried T, Lengauer C, Cremer T, Wiegant J, Raap AK, Ploeg van der M, Groitl P, Lipp M: Specific metaphase and interphase detection of the breakpoint region in 8q24 of Burkitt lymphoma cells by triple-colour fluorescent in situ hybridisation. Genes Chrom Cancer. 1992, 4: 69-74. 10.1002/gcc.2870040109.View ArticlePubMedGoogle Scholar
- Thompson JD, Higgins DG, Gibson TJ: CLUSTALW: improving the sensitivity of progressive multiple sequence alignment through sequence weighting, position-specific gap penalties and weight matrix choice. Nucleic Acids Res. 1994, 22: 4673-4680. 10.1093/nar/22.22.4673.PubMed CentralView ArticlePubMedGoogle Scholar
- Posada D, Crandall KA: Modeltest: testing the model of DNA substitution. Bioinformatics. 1998, 14: 817-818. 10.1093/bioinformatics/14.9.817.View ArticlePubMedGoogle Scholar
- Swofford DL: PAUP*:Phylogenetic analysis using parsimony (*and other methods). Version 4.0b4a. 2000, Sinauer Associates, Sunderland, MassachusettsGoogle Scholar
- Felsenstein J: Evolutionary trees from DNA sequences: a maximum likelihood approach. J Mol Evol. 1981, 17: 368-376. 10.1007/BF01734359.View ArticlePubMedGoogle Scholar
- Sawyer S: Statistical tests for detecting gene conversion. Mol Biol Evol. 1989, 6: 526-538.PubMedGoogle Scholar
- McConkey EH: Orthologous numbering of great ape and human chromosomes is essential for comparative genomics. Cytogenet Genome Res. 2004, 105: 157-158. 10.1159/000078022.View ArticlePubMedGoogle Scholar
- ISCN: An international system for human cytogenetic nomenclature. Edited by: Harnden DG, Klinger HP. 1985, published in collaboration with Cytogenet Cell Genet, Basel: KargerGoogle Scholar
- Goidts V, Szamalek JM, de Jong PJ, Cooper DN, Chuzhanova N, Hameister H, Kehrer-Sawatzki H: Independant intrachromosomal recombination events underlie the pericentric inversions of chimpanzee and gorilla chromosomes homologous to human chromosome 16. Genome Res. 2005, 15: 1232-1242. 10.1101/gr.3732505.PubMed CentralView ArticlePubMedGoogle Scholar
- Jauch A, Wienberg J, Stanyon R, Arnold N, Tofanelli S, Ishida T, Cremer T: Reconstruction of genomic rearrangements in great apes and gibbons by chromosome painting. Proc Natl Acad Sci USA. 1992, 89: 8611-8615. 10.1073/pnas.89.18.8611.PubMed CentralView ArticlePubMedGoogle Scholar
- Müller S, Neusser M, Wienberg J: Towards unlimited colours for fluorescence in situ hybridization (FISH). Chromosome Res. 2002, 10: 223-232. 10.1023/A:1015296122470.View ArticlePubMedGoogle Scholar
- De Vries GF, De France HF, Schevers JAM: Identical Giemsa banding pattern of two Macaca species: Macaca mulatta and Macaca fascicularis. A densiometric study. Cytogenet Cell Genet. 1975, 14: 26-3. 10.1159/000130316.View ArticlePubMedGoogle Scholar
- Stanyon R, Fantini C, Camperio-Ciani A, Chiarelli B, Ardito G: Banded karyotypes of 20 papionini species reveal no necessary correlation with speciation. Am J Primatol. 1988, 16: 3-17. 10.1002/ajp.1350160103.View ArticleGoogle Scholar
- Wienberg J, Stanyon R, Jauch A, Cremer T: Homologies in human and Macaca fuscata chromosomes revealed by in situ suppression hybridization with human chromosome specific DNA libraries. Chromosoma. 1992, 101: 265-270. 10.1007/BF00346004.View ArticlePubMedGoogle Scholar
- Bigoni F, Stanyon R, Wimmer R, Schempp W: Chromosome painting shows that the proboscis monkey (Nasalis larvatus) has a derived karyotype and is phylogenetically nested within Asian Colobines. Am J Primatol. 2003, 60: 85-93. 10.1002/ajp.10095.View ArticlePubMedGoogle Scholar
- Morescalchi MA, Schempp W, Consigliere S, Bigoni F, Wienberg J, Stanyon R: Mapping chromosomal homology between humans and the black-handed spider monkey by fluorescence in situ hybridization. Chromosome Res. 1997, 5: 527-536. 10.1023/A:1018489602312.View ArticlePubMedGoogle Scholar
- Müller S, O'Brien PCM, Ferguson-Smith MA, Wienberg J: Reciprocal chromosome painting between human and prosimians (Eulemur macaco macaco and E. fulvus mayottensis). Cytogenet Cell Genet. 1997, 78: 260-271. 10.1159/000134669.View ArticlePubMedGoogle Scholar
- Cardone MF, Ventura M, Tempesta S, Rocchi M, Archidiacono N: Analysis of chromosome conservation in Lemur catta studied by chromosome paints and BAC/PAC probes. Chromosoma. 2002, 111: 348-356. 10.1007/s00412-002-0215-3.View ArticlePubMedGoogle Scholar
- Yang F, Graphodatsky AS, O'Brien PCM, Colabella A, Solanky N, Squire M, Sargan DR, Ferguson-Smith MA: Reciprocal chromosome painting illuminates the history of genome evolution of the domestic cat, dog and human. Chromosome Res. 2000, 8: 393-404. 10.1023/A:1009210803123.View ArticlePubMedGoogle Scholar
- Rodova M, Islam MR, Peterson KR, Calvet JP: Remarkable sequence conservation of the last intron in the PKD1 gene. Mol Biol Evol. 2003, 20: 1669-1674. 10.1093/molbev/msg191.View ArticlePubMedGoogle Scholar
- Watnik TJ, Gandolph MA, Weber H, Neumann HPH, Germino GG: Gene gonversion is a likely cause of mutation in PKD1. Hum Mol Genet. 1998, 7: 1239-1243. 10.1093/hmg/7.8.1239.View ArticleGoogle Scholar
- Afzal AR, Florencio RN, Taylor R, Patton MA, Saggar-Malik A, Jeffery S: Novel mutations in the duplicated region of the polycystic kidnea disease 1 (PKD1) gene provides supporting evidence for gene conversion. Genet Test. 2000, 4: 365-370. 10.1089/109065700750065108.View ArticlePubMedGoogle Scholar
- Inoue S, Inoue K, Utsunomiya M, Nozaki J, Yamada Y, Iwasa T, Mori E, Yoshinaga T, Koizumi A: Mutation analysis in PKD1 of Japanese autosomal dominant polycystic kidney disease patients. Hum Mutat. 2002, 19: 622-628. 10.1002/humu.10080.View ArticlePubMedGoogle Scholar
- Chen J-M, Cooper DN, Chuzhanova N, Férec C, Patrinos GP: Gene conversion: mechanisms, evolution and human disease. Nature Rev Genet. 2007, 8: 762-775. 10.1038/nrg2193.View ArticlePubMedGoogle Scholar
- Posada D: Evaluation of methods for detecting recombination from DNA sequences: empirical data. Mol Biol Evol. 2002, 19: 708-717.View ArticlePubMedGoogle Scholar
- Dackowski WR, Luderer HF, Manavalan P, Bukanov NO, Russo RJ, Roberts BL, Klinger KW, Ibraghimov-Beskrovnaya O: Canine PKD1 is a single-copy gene: Genomic organization and comparative analysis. Genomics. 2002, 80: 105-112. 10.1006/geno.2002.6804.View ArticlePubMedGoogle Scholar
- Misceo D, Ventura M, Eder V, Rocchi M, Archidiacono N: Human chromosome 16 conservation in primates. Chromosome Res. 2003, 11: 323-326. 10.1023/A:1024087823030.View ArticlePubMedGoogle Scholar
- Jackson MS, Oliver K, Loveland J, Humphray S, Dunham I, Rocchi M, Viggiano L, Park JP, Hurles ME, Santibanez-Koref M: Evidence for widespread reticulate evolution within human duplicons. Am J Hum Genet. 2005, 77: 824-840. 10.1086/497704.PubMed CentralView ArticlePubMedGoogle Scholar
- Stankiewicz P, Shaw CJ, Withers M, Inoue K, Lupski JR: Serial segmental duplications during primate evolution results in complex human genome architecture. Genome Res. 2004, 14: 2209-2220. 10.1101/gr.2746604.PubMed CentralView ArticlePubMedGoogle Scholar
- Woelk CH, Frost SDW, Richman DD, Higley PE, Kosakovsky Pond SL: Evolution of the interferon alpha gene family in eutherian mammals. Gene. 2007, 397: 38-50. 10.1016/j.gene.2007.03.018.PubMed CentralView ArticlePubMedGoogle Scholar
- Switonski M, Reimann N, Bosma AA, Long S, Bartnitzke S, Pienkowska A, Moreno-Milan MM, Fischer P: Report on the progress of standardization of the G-banded canine (Canis familiaris) karyotypes. Chromosome Res. 1996, 4: 306-309. 10.1007/BF02263682.View ArticlePubMedGoogle Scholar
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