Expression cloning of multiple human cDNAs that complement the phenotypic defects of ataxia-telangiectasia group D fibroblasts.
Expression cloning of multiple human cDNAs that complement the phenotypic defects of ataxia-telangiectasia group D fibroblasts.
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多个人类 cDNA 的表达克隆,可补充共济失调毛细血管扩张 D 组成纤维细胞的表型缺陷。
DOI:
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发表时间:
1993
影响因子:
9.8
通讯作者:
L. B. Herzing
中科院分区:
文献类型:
--
作者:
M. Meyn;J. Lu;L. B. Herzing
Ataxia-telangiectasia (A-T) is an inherited human disease of unknown etiology associated with neurologic degeneration, immune dysfunction, cancer risk, and genetic instability. A-T cells are sensitive to ionizing radiation and radiomimetic drugs, offering the possibility of cloning A-T genes by phenotypic complementation. We have used this sensitivity to isolate the first human cDNAs reported to complement A-T cells in culture. Complementation group D A-T fibroblasts were transfected with an episomal vector-based human cDNA library, approximately 610,000 resultant transformants were treated with the radiomimetic drug streptonigrin-resistant, and nine unrelated cDNAs were recovered from 29 surviving streptonigrin-resistant clones. Five cDNAs were mapped, but none localized to 11q23, the site of A-T complementation group A and C loci. Four of the mapped cDNAs conferred mutagen resistance to A-T D fibroblasts on secondary transfection. One cDNA was identified as a fragment of dek, a gene involved in acute myeloid leukemia. The dek cDNA fragment and pCAT4.5, a 4.5-kb cDNA that mapped to 17p11, independently complemented three different phenotypic abnormalities of A-T D fibroblasts (mutagen sensitivity, hyper-recombination, and radio-resistant DNA synthesis). The pCAT4.5 cDNA did not complement the mutagen sensitivity of an A-T group C fibroblast line, suggesting that it represents a candidate disease gene for group D A-T. Our results indicate that phenotypic complementation alone is insufficient evidence to prove that a candidate cDNA is an A-T disease gene. The complementing cDNAs may represent previously uncharacterized genes that function in the same pathway as does the A-T gene product(s) in the regulation of cellular responses to DNA damage.
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DOI:
10.1073/pnas.88.13.5907
发表时间:
1991
影响因子:
11.1
作者:
Lambert,C;Schultz,RA;Smith,M;Wagner-McPherson,C;McDaniel,LD;Donlon,T;Stanbridge,EJ;Friedberg,EC
通讯作者:
Friedberg,EC
影响因子:
9.8
作者:
Leon N. Kapp;Robert B. Painter;Yu Lc;N. vanLoon;Richard Cw rd;Michael R. James;David Cox;J. Murnane
通讯作者:
Leon N. Kapp;Robert B. Painter;Yu Lc;N. vanLoon;Richard Cw rd;Michael R. James;David Cox;J. Murnane
影响因子:
56.9
作者:
LICHTER, P;TANG, CJC;WARD, DC
通讯作者:
WARD, DC
影响因子:
5.3
作者:
Wake,CT;Gudewicz,T;Porter,T;White,A;Wilson,JH
通讯作者:
Wilson,JH
DOI:
10.1101/sqb.1991.056.01.049
发表时间:
1991
期刊:
Cold Spring Harbor symposia on quantitative biology
影响因子:
--
作者:
Schimke,RT;Kung,AL;Rush,DF;Sherwood,SW
通讯作者:
Sherwood,SW