PMID- 7717399 OWN - NLM STAT- MEDLINE DCOM- 19950515 LR - 20200824 IS - 0002-9297 (Print) IS - 1537-6605 (Electronic) IS - 0002-9297 (Linking) VI - 56 IP - 4 DP - 1995 Apr TI - Insertion of an Alu sequence in the Ca(2+)-sensing receptor gene in familial hypocalciuric hypercalcemia and neonatal severe hyperparathyroidism. PG - 880-6 AB - Missense mutations in the calcium-sensing receptor (CaR) gene have previously been identified in patients with familial hypocalciuric hypercalcemia (FHH) and neonatal severe hyperparathyroidism (NSHPT). We studied family members of a Nova Scotian deme expressing both FHH and NSHPT and found, by PCR amplification of CaR gene exons, that FHH individuals were heterozygous and NSHPT individuals were homozygous for an abnormally large exon 7. This is due to an insertion at codon 877 of an Alu-repetitive element of the predicted-variant/human-specific-1 subfamily. It is in the opposite orientation to the CaR gene and contains an exceptionally long poly(A) tract. Stop signals are introduced in all reading frames within the Alu sequence, leading to a predicted shortened mutant CaR protein. The loss of the majority of the CaR carboxyl-terminal intracellular domain would dramatically impair its signal transduction capability. Identification of the specific mutation responsible for the FHH/NSHPT phenotype in this community will allow rapid testing of at-risk individuals. FAU - Janicic, N AU - Janicic N AD - Department of Medicine, McGill University, Montreal, Canada. FAU - Pausova, Z AU - Pausova Z FAU - Cole, D E AU - Cole DE FAU - Hendy, G N AU - Hendy GN LA - eng SI - GENBANK/S77605 PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Am J Hum Genet JT - American journal of human genetics JID - 0370475 RN - 0 (DNA Transposable Elements) RN - 0 (Receptors, Calcium-Sensing) RN - 0 (Receptors, Cell Surface) SB - IM MH - Base Sequence MH - DNA Mutational Analysis MH - DNA Transposable Elements MH - Exons MH - Female MH - Haplotypes MH - Humans MH - Hypercalcemia/*genetics MH - Hyperparathyroidism/*genetics MH - Male MH - Molecular Sequence Data MH - Pedigree MH - Receptors, Calcium-Sensing MH - Receptors, Cell Surface/*genetics MH - *Repetitive Sequences, Nucleic Acid MH - Sequence Analysis, DNA PMC - PMC1801194 EDAT- 1995/04/01 00:00 MHDA- 1995/04/01 00:01 PMCR- 1995/10/01 CRDT- 1995/04/01 00:00 PHST- 1995/04/01 00:00 [pubmed] PHST- 1995/04/01 00:01 [medline] PHST- 1995/04/01 00:00 [entrez] PHST- 1995/10/01 00:00 [pmc-release] PST - ppublish SO - Am J Hum Genet. 1995 Apr;56(4):880-6.