TY - JOUR
T1 - Isolation and characterization of a major tandem repeat family from the human X chromosome
AU - Willard, Huntington F.
AU - Smith, Kirby D.
AU - Sutherland, Joanne
N1 - Funding Information:
We thank B. Schmeckpeper for helpful comments and various colleagues mentioned in the text for providing cell lines. H.F.W. thanks U. Tzetis Holmes and V. E. Powers for expert technical assistance, R. Worton for providing DNAs, and E. Chan-Erickson for typing the manuscript. This work was supported in part by grants from the National Institutes of Health (K.D.S.) and the Medical Research Council of Canada (H.F.f.). During a portion of this work, H.F.W. was funded by National Institutes of Health Postdoctoral Fellowship GMO7471 at Johns Hopkins University.
PY - 1983/4/11
Y1 - 1983/4/11
N2 - We report the Identification and characterization of a family of repeated restriction fragments whose molecular organization is apparently specific to the human X chromosome. This fragment, identified as an ethidium bromide-staining 2.0 kilobase (kb) band in BamHI-digested DNA from a Chinese hamstser-human somatic cell hybrid containing a human X chromosome, has been cloned into pBR325 and characterized. The 2.0 kb repeated family has been assigned to the Xpll→ Xql2 region on the X by Southern blot analysis of somatic cell hybrids and is predominantly arranged in tandem clusters of up to seven 2.0 kb monomers. Homologous DNA sequence, not organized as 2.0 kb BamHI fragments, are found elsewhere on the X chromosome and on at least some autosomes, but are not found on the Y chromosome. From a dosing experiment using various amounts of the cloned repeat, we estimate that there are 5,000 - 7,500 copies of the 2.0 kb BamHI repeat per haploid genome. Since the vast majority, if not all, of these are confined to the X chromosome, this repeated DNA family must account for 5-10% of all X chromosome DNA and Bust constitute the major sequence component of the pericentromeric region of the X.
AB - We report the Identification and characterization of a family of repeated restriction fragments whose molecular organization is apparently specific to the human X chromosome. This fragment, identified as an ethidium bromide-staining 2.0 kilobase (kb) band in BamHI-digested DNA from a Chinese hamstser-human somatic cell hybrid containing a human X chromosome, has been cloned into pBR325 and characterized. The 2.0 kb repeated family has been assigned to the Xpll→ Xql2 region on the X by Southern blot analysis of somatic cell hybrids and is predominantly arranged in tandem clusters of up to seven 2.0 kb monomers. Homologous DNA sequence, not organized as 2.0 kb BamHI fragments, are found elsewhere on the X chromosome and on at least some autosomes, but are not found on the Y chromosome. From a dosing experiment using various amounts of the cloned repeat, we estimate that there are 5,000 - 7,500 copies of the 2.0 kb BamHI repeat per haploid genome. Since the vast majority, if not all, of these are confined to the X chromosome, this repeated DNA family must account for 5-10% of all X chromosome DNA and Bust constitute the major sequence component of the pericentromeric region of the X.
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U2 - 10.1093/nar/11.7.2017
DO - 10.1093/nar/11.7.2017
M3 - Article
C2 - 6300789
AN - SCOPUS:0021100775
SN - 0305-1048
VL - 11
SP - 2017
EP - 2034
JO - Nucleic acids research
JF - Nucleic acids research
IS - 7
ER -