PMID- 10660331 OWN - NLM STAT- MEDLINE DCOM- 20000201 LR - 20041117 IS - 1059-7794 (Print) IS - 1059-7794 (Linking) VI - 12 IP - 3 DP - 1998 TI - A common beta ig-h3 gene mutation (delta f540) in a large cohort of Sardinian Reis Bucklers corneal dystrophy patients. Mutations in brief no. 180. Online. PG - 215-6 AB - Reis-Bucklers' corneal dystrophy (RBCD) is a relatively rare autosomal dominant disease originating in the Bowman's membrane, which causes severe visual impairment. Recently RBCD, together with lattice corneal dystrophy type I (LCDI), granular corneal dystrophy (CDGG1) and Avellino stromal dystrophy (ASD), all mapped on 5q31, were found to be associated to four different mutations in the beta ig-h3 gene which codify for kerato-epithelin. We identified several cases of RBCD in Sardinia. We reconstructed through genealogical search two eight generation-families, originating from the same village (Arbus), indicating a common ancestor for RBCD in Sardinia. Linkage studies on these families confirmed the association of the disease with the 5q31 region. Sequence analysis of beta ig-h3 gene revealed a trinucleotide deletion in exon 12, corresponding to the loss of F540 in the protein sequence (delta F540). Our data describe a new mutation in the beta ig-h3 gene causing RBCD. This dominant negative mutation is located in the fourth internal repeat of kerato-epithelin which is a protein domain highly conserved across species. This suggests the basic role of this domain in maintaining the proper kerato-epithelin structure which when altered can cause the typical precipitates in the RBCD cornea. FAU - Rozzo, C AU - Rozzo C AD - Istituto di Genetica Molecolare, C.N.R., Alghero, Italy. cr@igm.ss.cnr.it FAU - Fossarello, M AU - Fossarello M FAU - Galleri, G AU - Galleri G FAU - Sole, G AU - Sole G FAU - Serru, A AU - Serru A FAU - Orzalesi, N AU - Orzalesi N FAU - Serra, A AU - Serra A FAU - Pirastu, M AU - Pirastu M LA - eng PT - Journal Article PL - United States TA - Hum Mutat JT - Human mutation JID - 9215429 RN - 0 (Extracellular Matrix Proteins) RN - 0 (Neoplasm Proteins) RN - 0 (Transforming Growth Factor beta) RN - 148710-76-3 (betaIG-H3 protein) SB - IM MH - Chromosomes, Human, Pair 5/genetics MH - Corneal Dystrophies, Hereditary/*genetics MH - *Extracellular Matrix Proteins MH - Humans MH - Mutation/*genetics MH - Neoplasm Proteins/*genetics MH - Transforming Growth Factor beta/genetics EDAT- 2000/02/05 00:00 MHDA- 2000/02/05 00:01 CRDT- 2000/02/05 00:00 PHST- 2000/02/05 00:00 [pubmed] PHST- 2000/02/05 00:01 [medline] PHST- 2000/02/05 00:00 [entrez] PST - ppublish SO - Hum Mutat. 1998;12(3):215-6.