Nucleotide sequence analysis of a candidate gene for ataxia-telangiectasia group D (ATDC)

Journal Article · Sat Jan 01 04:00:00 EST 1994 · Genomics; (United States)

DOI:https://doi.org/10.1006/geno.1994.1022· OSTI ID:6574008

Leonhardt, E A; Kapp, L N; Young, B R; Murnane, J P ^[1]

---

1. Univ. of California, San Francisco, CA (United States)

A radioresistant cell clone (1B3) was previously isolated after transfection of an ataxia-telangiectasia (AT) group D cell line with a human cosmid library. A cosmid rescued from the integration site in 1B3 contained human DNA from chromosome position 11q23, the same region shown by both genetic linkage and chromosome transfer to contain the genes for AT complementation groups A/B, C, and D. A gene within the cosmid (ATDC) was found to produce mRNAs of different sizes. A cDNA for one of the most abundant mRNAs (3.0 kb) was isolated from a HeLa cell library. In the present study, the authors sequenced the 3.0-kb cDNA and the surrounding intron DNA in the cosmids. They used polymerase chain reaction, with primers in the introns, to confirm the number of exons and to analyze DNA from AT group D cells for mutations within this gene. Although no mutations were found, they do not rule out the possibility that mutations may be present within the regulatory sequences or coding sequences found in other mRNAs specific for this gene. From the sequence analysis, they found that the ATDC gene product is one of a group of proteins that share multiple zinc finger motifs and an adjacent leucine zipper motif. These proteins have been proposed to form homo- or hetero-dimers involved in nucleic acid binding, consistent with the fact that many of these proteins appear to be transcriptional regulatory factors involved in carcinogenesis and/or differentiation. The likelihood that the ATDC gene product is involved in transcriptional regulation could explain the pleiomorphic characteristics of AT, including abnormal cell cycle regulation. 36 refs., 5 figs., 2 tabs.

• DOE Contract Number: AC03-76SF01012
• OSTI ID: 6574008
• Journal Information: Genomics; (United States), Journal Name: Genomics; (United States) Vol. 19:1; ISSN GNMCEP; ISSN 0888-7543
• Country of Publication: United States
• Language: English

Related Subjects

550400* -- Genetics
59 BASIC BIOLOGICAL SCIENCES
BIOTECHNOLOGY
BODY
BRAIN
CENTRAL NERVOUS SYSTEM
CEREBELLUM
CLONING
DISEASES
DNA HYBRIDIZATION
DNA SEQUENCING
DNA-CLONING
GENES
GENETIC ENGINEERING
HEREDITARY DISEASES
HYBRIDIZATION
NERVOUS SYSTEM
NUCLEIC ACID HYBRIDIZATION
ORGANS
STRUCTURAL CHEMICAL ANALYSIS
TRANSCRIPTION FACTORS