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The human archain gene, ARCN1, has highly conserved homologs in rice and Drosophila.

Radice P., Pensotti V., Jones C., Perry H., Pierotti M.A., Tunnacliffe A.

A novel human gene, ARCN1, has been identified in chromosome band 11q23.3. It maps approximately 50 kb telomeric to MLL, a gene that is disrupted in a number of leukemia-associated translocation chromosomes. cDNA clones representing ARCN1 hybridize to 4-kb mRNA species present in all tissues tested. Sequencing of cDNAs suggests that at least two forms of mRNA with alternative 5' ends are present within the cell. The mRNA with the longest open reading frame gives rise to a protein of 57 kDa. Although the sequence reported is novel, remarkable similarity is observed with two predicted protein sequences from partial DNA sequences generated by rice (Oryza sativa) and fruit fly (Drosophila melanogaster) genome projects. The degree of sequence conservation is comparable to that observed for highly conserved structural proteins, such as heat shock protein HSP70, and is greater than that of gamma-tubulin and heat shock protein HSP60. A more distant relationship to the group of clathrin-associated proteins suggests a possible role in vesicle structure or trafficking. In view of its ancient pedigree and a potential involvement in cellular architecture, we propose that the ARCN1 protein be named archain.

Genomics 26:101-106(1995) [PubMed] [Europe PMC]

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