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New insights into the evolution of chromosome 1

Weise A. · Starke H. · Mrasek K. · Claussen U. · Liehr T.
Institut für Humangenetik und Anthropologie, Jena (Germany) Cytogenet Genome Res 108:217–222 (2005) (DOI:10.1159/000080819)


A complex low-repetitive human DNA probe (BAC RP11-35B4) together with two microdissection-derived region-specific probes of the multicolor banding (MCB) probe-set for chromosome 1 were used to re-analyze the evolution of human chromosome 1 in comparison to four ape species. BAC RP11-35B4 derives from 1q21 and contains 143 kb of non-repetitive DNA; however, it produces three specific FISH signals in 1q21, 1p12 and 1p36.1 of Homo sapiens (HSA). Human chromosome 1 was studied in comparison to its homologues in Hylobates lar (HLA), Pongo pygmaeus (PPY), Gorilla gorilla (GGO) and Pan troglodytes (PTR). A duplication of sequences homologous to human 1p36.1 could be detected in PPY plus an additional signal on PPY 16q. The region homologous to HSA 1p36.1 is also duplicated in HLA, and split onto chromosomes 7q and 9p; the region homologous to HSA 1q21/1p12 is present as one region on 5q. Additionally, the breakpoint of a small pericentric inversion in the evolution of human chromosome 1 compared to other great ape species could be refined. In summary, the results obtained here are in concordance with previous reports; however, there is evidence for a deletion of regions homologous to human 1p34.2→p34.1 during evolution in the Pongidae branch after separation of PPY.   


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