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. 1993 May 15;90(10):4738–4742. doi: 10.1073/pnas.90.10.4738

Structure and expression of the human trithorax-like gene 1 involved in acute leukemias.

P Parry 1, M Djabali 1, M Bower 1, J Khristich 1, M Waterman 1, B Gibbons 1, B D Young 1, G Evans 1
PMCID: PMC46588  PMID: 8506328

Abstract

The human trithorax-like gene 1 (Htrx1 gene) is disrupted in 11q23 translocations that are associated with acute leukemias. Sequencing of a partial human cDNA revealed an open reading frame encoding 1012 amino acids with extensive homology to the Drosophila trithorax protein, particularly in the zinc finger-like domains. Htrx1 gene appears to be unique in the human genome and has been conserved during evolution. Use of the human cDNA as a probe demonstrates that this gene is interrupted in both infant and adult acute myeloid (AML) and lymphoid (ALL) leukemia patients with 11q23 translocations. The structure of the Htrx1 gene around the breakpoints shows that this part of the human gene is interrupted by nine introns. As a result of the rearrangement, zinc finger domains are translocated in both ALL and AML patients. Expression studies reveal that the Htrx1 gene differentially expresses three transcripts within the normal lymphocyte cell lineage.

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