PMID- 10394929 OWN - NLM STAT- MEDLINE DCOM- 19990723 LR - 20220317 IS - 0340-6717 (Print) IS - 0340-6717 (Linking) VI - 104 IP - 5 DP - 1999 May TI - The mutation spectrum of the bestrophin protein--functional implications. PG - 383-9 AB - Best's macular dystrophy (BMD), also known as vitelliform macular degeneration type 2 (VMD2; OMIM 153700), is an autosomal dominant form of macular degeneration with mainly juvenile onset. BMD is characterized by the accumulation of lipofuscin within and beneath the retinal pigment epithelium. The gene causing the disease has been localized to 11q13 by recombination breakpoint mapping. Recently, we have identified the causative gene encoding a protein named bestrophin, and mutations have been found mainly to affect residues that are conserved from a family of genes in Caenorhabditis elegans. The function of bestrophin is so far unknown, and no reliable predictions can be made from sequence comparisons. We have investigated the bestrophin gene in 14 unrelated Swedish, Dutch, Danish, and Moroccan families affected with BMD and found eight new mutations. Including the previously published mutations, 15 different missense mutations have now been detected in 19 of the 22 families with BMD investigated by our laboratory. Interestingly, the mutations cluster in certain regions, and no nonsense mutations or mutations causing frame-shifts have been identified. Computer simulations of the structural elements in the bestrophin protein show that this protein is probably membrane bound, with four putative transmembrane regions. FAU - Bakall, B AU - Bakall B AD - Department of Genetics and Pathology, University Hospital, Uppsala, Sweden. benjamin.bakall@klingen.uu.se FAU - Marknell, T AU - Marknell T FAU - Ingvast, S AU - Ingvast S FAU - Koisti, M J AU - Koisti MJ FAU - Sandgren, O AU - Sandgren O FAU - Li, W AU - Li W FAU - Bergen, A A AU - Bergen AA FAU - Andreasson, S AU - Andreasson S FAU - Rosenberg, T AU - Rosenberg T FAU - Petrukhin, K AU - Petrukhin K FAU - Wadelius, C AU - Wadelius C LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - Germany TA - Hum Genet JT - Human genetics JID - 7613873 RN - 0 (BEST1 protein, human) RN - 0 (Bestrophins) RN - 0 (Chloride Channels) RN - 0 (DNA Primers) RN - 0 (Eye Proteins) SB - IM MH - Amino Acid Sequence MH - Amino Acid Substitution MH - Animals MH - Base Sequence MH - Bestrophins MH - Caenorhabditis elegans/genetics MH - Chloride Channels MH - Chromosome Mapping MH - *Chromosomes, Human, Pair 11 MH - Confidence Intervals MH - DNA Primers MH - Exons MH - Eye Proteins/chemistry/*genetics MH - Humans MH - Macular Degeneration/*genetics MH - Molecular Sequence Data MH - *Mutation, Missense MH - Protein Conformation MH - Recombination, Genetic MH - Reference Values MH - Sequence Alignment MH - Sequence Homology, Amino Acid EDAT- 1999/07/08 00:00 MHDA- 1999/07/08 00:01 CRDT- 1999/07/08 00:00 PHST- 1999/07/08 00:00 [pubmed] PHST- 1999/07/08 00:01 [medline] PHST- 1999/07/08 00:00 [entrez] AID - 10.1007/s004390050972 [doi] PST - ppublish SO - Hum Genet. 1999 May;104(5):383-9. doi: 10.1007/s004390050972.