Mutations in the gene encoding capillary morphogenesis protein 2 cause juvenile hyaline fibromatosis and infantile systemic hyalinosis

Mutations in the gene encoding capillary morphogenesis protein 2 cause juvenile hyaline fibromatosis and infantile systemic hyalinosis

Hanks S; Adams S; Douglas J; Arbour L; Atherton DJ; Balci S; Bode H; Campbell ME; Feingold M; Keser G; Kleijer W; Mancini G; McGrath JA; Muntoni F; Nanda A; Teare MD; Warman M; Pope FM; Superti-Furga A; Futreal PA; Rahman N

American Journal Of Human Genetics

2003

Female; Humans; Male; Family; Mutation; Animals; Molecular Sequence Data; Non-U.S. Gov't; Research Support; Pedigree; Membrane Proteins/genetics; Base Sequence; Amino Acid Sequence; Amino Acid; DNA Primers; Fibroma/genetics; Genetic Markers; Gingival Hypertrophy/genetics; In Situ Hybridization; Myofibromatosis/genetics; Reverse Transcriptase Polymerase Chain Reaction; Sequence Alignment; Sequence Homology; Skin Neoplasms/genetics

Juvenile hyaline fibromatosis (JHF) and infantile systemic hyalinosis (ISH) are autosomal recessive conditions characterized by multiple subcutaneous skin nodules, gingival hypertrophy, joint contractures, and hyaline deposition. We previously mapped the gene for JHF to chromosome 4q21. We now report the identification of 15 different mutations in the gene encoding capillary morphogenesis protein 2 (CMG2) in 17 families with JHF or ISH. CMG2 is a transmembrane protein that is induced during capillary morphogenesis and that binds laminin and collagen IV via a von Willebrand factor type A (vWA) domain. Of interest, CMG2 also functions as a cellular receptor for anthrax toxin. Preliminary genotype-phenotype analyses suggest that abrogation of binding by the vWA domain results in severe disease typical of ISH, whereas in-frame mutations affecting a novel, highly conserved cytoplasmic domain result in a milder phenotype. These data (1) demonstrate that JHF and ISH are allelic conditions and (2) implicate perturbation of basement-membrane matrix assembly as the cause of the characteristic perivascular hyaline deposition seen in these conditions.

2003

Article information provided for research and reference use only. PedPalASCNET does not hold any rights over the resource listed here. All rights are retained by the journal listed under publisher and/or the creator(s).

Journal Article

Backlog