Alpha heavy chain disease of patient MAL: structure of the non-functional rearranged alpha gene translocated on chromosome 9.

Abstract

Alpha heavy chain diseases (HCD) are lymphoproliferative disorders characterized by the production of truncated alpha immunoglobulin heavy chain without associated light chains, alpha HCD MAL is featured by multiple structural alterations of the alpha 1 productive gene and on original t(9;14)(p11;q32) translocation involving the other rearranged alpha 1 allele. We present here the structure of the der(9) chromosome. Sequence analysis provides evidence that the translocation occurred after local pairing of the two chromosomes mediated by an almost perfect nonameric sequence, followed by a staggered double-strand break of chromosome 14. This translocation occurred on a V(D)J rearranged locus; unexpectedly, there were a deletion of the 3' part of the VH gene, several insertions of non-immunoglobulin-related genes and multiple mutations, i.e. alterations reminiscent of those occurring on the HCD productive genes.

• Authors: P Pellet, A Tsapis, J C Brouet
• Journal: European journal of immunology (Eur J Immunol) Vol. 20 Issue 12 Pg. 2731-5 (Dec 1990) ISSN: 0014-2980 [Print] Germany
• PMID: 2125275 (Publication Type: Case Reports, Journal Article)

Chemical References

• Immunoglobulin alpha-Chains

Topics

• B-Lymphocytes (physiology)
• Base Sequence
• Chromosomes, Human, Pair 14
• Chromosomes, Human, Pair 9
• Cloning, Molecular
• Gene Rearrangement, B-Lymphocyte, Heavy Chain
• Genes, Immunoglobulin
• Humans
• Immunoglobulin alpha-Chains (genetics)
• Immunoproliferative Small Intestinal Disease (genetics)
• Molecular Sequence Data
• Restriction Mapping
• Translocation, Genetic