Abstract
The human neurodegenerative and cancer predisposition condition ataxia-telangiectasia is characterized at the cellular level by radiosensitivity, chromosomal instability, and impaired induction of ionizing radiation-induced cell cycle checkpoint controls. Recent work has revealed that the gene defective in ataxia-telangiectasia, termed ATM , encodes an ≈350-kDa polypeptide, ATM, that is a member of the phosphatidylinositol 3-kinase family. We show that ATM binds DNA and exploit this to purify ATM to near homogeneity. Atomic force microscopy reveals that ATM exists in two populations, with sizes consistent with monomeric and tetrameric states. Atomic force microscopy analyses also show that ATM binds preferentially to DNA ends. This property is similar to that displayed by the DNA-dependent protein kinase catalytic subunit, a phosphatidylinositol 3-kinase family member that functions in DNA damage detection in conjunction with the DNA end-binding protein Ku. Furthermore, purified ATM contains a kinase activity that phosphorylates serine-15 of p53 in a DNA-stimulated manner. These results provide a biochemical assay system for ATM, support genetic data indicating distinct roles for DNA-dependent protein kinase and ATM, and suggest how ATM may signal the presence of DNA damage to p53 and other downstream effectors.
References
38
Referenced
133
10.1016/S0959-437X(97)80125-6
10.1146/annurev.immunol.15.1.177
10.1093/hmg/7.10.1555
10.1016/0092-8674(92)90593-2
- K K Khanna, M F Lavin Oncogene 12, 3307–3312 (1993). / Oncogene by Khanna K K (1993)
10.1101/gad.11.24.3471
10.1126/science.7792600
10.1093/hmg/4.11.2025
10.1038/42648
10.1126/science.270.5233.50
10.1016/0092-8674(95)90463-8
10.1016/0092-8674(95)90482-4
- S P Jackson Cancer Surv 28, 261–279 (1996). / Cancer Surv by Jackson S P (1996)
10.1016/S0021-9258(18)82219-0
10.1016/0092-8674(93)90057-W
10.1093/emboj/16.16.5098
10.1073/pnas.95.2.525
10.1016/S0959-437X(97)80116-5
10.1016/S0968-0004(98)01284-5
10.1101/gad.13.8.916
10.1074/jbc.271.52.33693
- N D Lakin, P Weber, T Stankovic, S T Rottinghaus, A M Taylor, S P Jackson Oncogene 13, 2707–2716 (1996). / Oncogene by Lakin N D (1996)
10.1073/pnas.94.5.1840
10.1038/sj.onc.1201037
10.1126/science.281.5383.1674
10.1126/science.281.5383.1677
10.1038/3882
10.1038/sj.onc.1202973
10.1128/MCB.19.9.6076
10.1073/pnas.94.9.4267
10.1006/jmbi.1998.2212
10.1016/0092-8674(92)90562-Q
10.1016/S0959-440X(05)80107-1
- J N Sarkaria, R S Tibbetts, E C Busby, A P Kennedy, D E Hill, R T Abraham Cancer Res 58, 4375–4382 (1998). / Cancer Res by Sarkaria J N (1998)
- R J Izzard, S P Jackson, G C M Smith Cancer Res 59, 2581–2586 (1999). / Cancer Res by Izzard R J (1999)
10.1073/pnas.91.15.6904
10.1016/S0021-9258(18)53216-6
10.1091/mbc.9.9.2361
Dates
Type | When |
---|---|
Created | 23 years, 1 month ago (July 26, 2002, 10:41 a.m.) |
Deposited | 3 years, 4 months ago (April 13, 2022, 3:51 p.m.) |
Indexed | 1 year, 2 months ago (June 24, 2024, 2:33 p.m.) |
Issued | 25 years, 11 months ago (Sept. 28, 1999) |
Published | 25 years, 11 months ago (Sept. 28, 1999) |
Published Online | 25 years, 11 months ago (Sept. 28, 1999) |
Published Print | 25 years, 11 months ago (Sept. 28, 1999) |
@article{Smith_1999, title={Purification and DNA binding properties of the ataxia-telangiectasia gene product ATM}, volume={96}, ISSN={1091-6490}, url={http://dx.doi.org/10.1073/pnas.96.20.11134}, DOI={10.1073/pnas.96.20.11134}, number={20}, journal={Proceedings of the National Academy of Sciences}, publisher={Proceedings of the National Academy of Sciences}, author={Smith, Graeme C. M. and Cary, Robert B. and Lakin, Nicholas D. and Hann, Byron C. and Teo, Soo-Hwang and Chen, David J. and Jackson, Stephen P.}, year={1999}, month=sep, pages={11134–11139} }