Yang R, Fristensky B, Deutch AH, Huang RC, Tan YH, Narang SA, Wu R. The nucleotide sequence of a new human repetitive DNA consists of eight tandem repeats of 66 base pairs.
Gene 1983;
25:59-66. [PMID:
6662363 DOI:
10.1016/0378-1119(83)90167-1]
[Citation(s) in RCA: 19] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Three cloned human DNA fragments obtained from a fibroblast genomic DNA were sequenced and identified as containing members of the well-known 300-bp Alu family of interspersed, middle-repetitive DNA sequences. One of these cloned DNA fragments, p16, also contains members of a new repetitive DNA family, which repeats several thousand times in the human genome. Each member of the new 528-bp family consists of eight tandem repeats of a 66-bp sequence. An AluI recognition site is present at the same location in each repeat, and a 25-bp sequence occurs twice (as a tandem repeat) in each of the eight repeats. There is no sequence homology between the new 528-bp family and the 300-bp Alu family, and the new family lacks the flanking 7- to 20-bp direct repeats as well as the dAMP-rich sequences characteristic of the 300-bp Alu family. Construction of a putative evolutionary tree indicates that six duplication events are needed to give rise to the eight tandemly repeated 66-bp units in the new 528-bp family.
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