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Semin Cell Biol. 1993 Feb;4(1):45-52.

The 70 kDa peroxisomal membrane protein: an ATP-binding cassette transporter protein involved in peroxisome biogenesis.

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  • 1Department of Pediatrics, Johns Hopkins School of Medicine, Baltimore, MD 21205.


The 70 kDa peroxisomal membrane protein (PMP70) is a major component of peroxisomal membranes. cDNAs for human and rat PMP70 have been cloned and sequenced and the gene mapped to human chromosome 1p21-22. The predicted amino acid sequence showed homology to members of the ATP-binding cassette transporter family. In humans, mutations in the PMP70 gene have been found in a subset of patients with Zellweger syndrome, a lethal inborn error of peroxisome biogenesis. These results suggest that PMP70 functions in transporting molecules or possibly peptides across the peroxisomal membrane and has an important role in peroxisome assembly.

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