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Science 24 June 1988:
Vol. 240. no. 4860, pp. 1776 - 1780
DOI: 10.1126/science.2454510
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Articles

Science, Vol 240, Issue 4860, 1776-1780
Copyright © 1988 by American Association for the Advancement of Science

articles

A point mutation in the c-myc locus of a Burkitt lymphoma abolishes binding of a nuclear protein

M Zajac-Kaye, EP Gelmann, and D Levens

Medicine Branch, National Cancer Institute, Bethesda, MD 20892.

A 20-base pair region in the first intron of the human c-myc gene was identified as the binding site of a nuclear protein. This binding site is mutated in five out of seven Burkitt lymphomas sequenced to date. To investigate the protein-recognition region in greater detail, the abnormal c-myc allele from a Burkitt lymphoma line (PA682) that carries a t(8;22) chromosomal translocation was used. A point mutation in the binding region of the PA682 c-myc DNA abolished binding of this nuclear protein. This protein may be an important factor for control of c-myc expression, and mutations in its recognition sequence may be associated with c-myc activation in many cases of Burkitt lymphoma.


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