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Vitelli, F. et al.

Identification and characterization of a highly conserved protein absent in the Alport syndrome (A), mental retardation (M), midface hypoplasia (M), and elliptocytosis (E) contiguous gene deletion syndrome (AMME).

We recently described a novel contiguous gene deletion syndrome (AMME) in Xq22.3 that includes Alport syndrome (A), mental retardation (M), midface hypoplasia (M), and elliptocytosis (E). While the Alport syndrome is due to deletion of the COL4A5 gene, no other genes are known in the region with the exception of our recent finding of the FACL4 gene. In our effort to isolate additional genes from the deleted region, we have identified the gene named AMMECR1 (Alport syndrome, mental retardation, midface hypoplasia, and elliptocytosis chromosomal region gene 1). RACE experiments and screening of cDNA libraries enabled us to obtain the entire ORF of the gene (1002 bp) followed by about 2 kb of 3'UTR. AMMECR1 is composed of six exons, shows a ubiquitous 6.5-kb transcript, and codes for a protein with a molecular mass of 35.5 kDa. Sequence analysis revealed that this gene is conserved in several species ranging from Caenorhabditis elegans and yeast to micro-organisms. Exon 2 of AMMECR1 encodes a domain consisting of six amino acids identically conserved throughout the course of evolution and whose function is as yet unknown. Analysis of the predicted protein product using ExPAsy tools raises the possibility that the gene may code for a regulatory factor potentially involved in the development of AMME contiguous gene deletion syndrome.[1]

References

Identification and characterization of a highly conserved protein absent in the Alport syndrome (A), mental retardation (M), midface hypoplasia (M), and elliptocytosis (E) contiguous gene deletion syndrome (AMME). Vitelli, F., Piccini, M., Caroli, F., Franco, B., Malandrini, A., Pober, B., Jonsson, J., Sorrentino, V., Renieri, A. Genomics (1999) [Pubmed]

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