PMID- 10332040 OWN - NLM STAT- MEDLINE DCOM- 19990708 LR - 20190513 IS - 0964-6906 (Print) IS - 0964-6906 (Linking) VI - 8 IP - 6 DP - 1999 Jun TI - Nonsense and temperature-sensitive mutations in PEX13 are the cause of complementation group H of peroxisome biogenesis disorders. PG - 1077-83 AB - Peroxisome biogenesis disorders, including Zellweger syndrome (ZS), neonatal adrenoleukodystrophy (NALD) and infantile Refsum disease, are lethal hereditary diseases caused by abnormalities in peroxisomal assembly. To date, 12 genotypes have been identified. We now have evidence that the complete human cDNA encoding Pex13p, an SH3 protein of a docking factor for the peroxisome targeting signal 1 receptor (Pex5p), rescues peroxisomal matrix protein import and its assembly in fibroblasts from PBD patients of complementation group H. In addition, we detected mutations on the human PEX13 cDNA in two patients of group H. A severe phenotype of a ZS patient (H-02) was homozygous for a nonsense mutation, W234ter, which results in the loss of not only the SH3 domain but also the putative transmembrane domain of Pex13p. A more mildly affected NALD patient (H-01), whose fibroblasts showed the temperature-sensitive (TS) phenotype, was homozygous for a missense mutation in the SH3 domain of Pex13p, I326T. This mutant PEX13 cDNA expression in a PEX13-defective CHO mutant showed I326T to be a TS mutation and thus suggested that Pex13p with the I326T mutation in the SH3 domain is stable at 30 degrees C but is somewhat unstable at 37 degrees C. FAU - Shimozawa, N AU - Shimozawa N AD - Department of Pediatrics, Gifu University School of Medicine, 40 Tsukasa-machi, Gifu 500-8076, Japan. nshim@cc.gifu-u.ac.jp FAU - Suzuki, Y AU - Suzuki Y FAU - Zhang, Z AU - Zhang Z FAU - Imamura, A AU - Imamura A FAU - Toyama, R AU - Toyama R FAU - Mukai, S AU - Mukai S FAU - Fujiki, Y AU - Fujiki Y FAU - Tsukamoto, T AU - Tsukamoto T FAU - Osumi, T AU - Osumi T FAU - Orii, T AU - Orii T FAU - Wanders, R J AU - Wanders RJ FAU - Kondo, N AU - Kondo N LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - England TA - Hum Mol Genet JT - Human molecular genetics JID - 9208958 RN - 0 (Membrane Proteins) RN - 0 (PEX13 protein, human) RN - 0 (Peroxisome-Targeting Signal 1 Receptor) RN - 0 (Receptors, Cytoplasmic and Nuclear) RN - 0 (Recombinant Fusion Proteins) RN - 9007-49-2 (DNA) SB - IM MH - Amino Acid Sequence MH - Amino Acid Substitution MH - Animals MH - Base Sequence MH - CHO Cells MH - Cricetinae MH - DNA/chemistry/genetics MH - DNA Mutational Analysis MH - Fibroblasts/cytology/metabolism MH - Genetic Complementation Test MH - Humans MH - Membrane Proteins/*genetics MH - Microbodies/metabolism MH - Mutation MH - Mutation, Missense MH - Peroxisomal Disorders/*genetics/metabolism/pathology MH - Peroxisome-Targeting Signal 1 Receptor MH - Phenotype MH - Point Mutation MH - Receptors, Cytoplasmic and Nuclear/metabolism MH - Recombinant Fusion Proteins/genetics MH - Zellweger Syndrome/genetics/metabolism/pathology EDAT- 1999/05/20 00:00 MHDA- 1999/05/20 00:01 CRDT- 1999/05/20 00:00 PHST- 1999/05/20 00:00 [pubmed] PHST- 1999/05/20 00:01 [medline] PHST- 1999/05/20 00:00 [entrez] AID - ddc124 [pii] AID - 10.1093/hmg/8.6.1077 [doi] PST - ppublish SO - Hum Mol Genet. 1999 Jun;8(6):1077-83. doi: 10.1093/hmg/8.6.1077.