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  • Title: GPC6, a novel member of the glypican gene family, encodes a product structurally related to GPC4 and is colocalized with GPC5 on human chromosome 13.
    Author: Paine-Saunders S, Viviano BL, Saunders S.
    Journal: Genomics; 1999 May 01; 57(3):455-8. PubMed ID: 10329016.
    Abstract:
    Glypicans are a family of cell surface heparan sulfate proteoglycans that appear to play an important role in cellular growth control and differentiation, as is supported by the observation that mutations in GPC3 are responsible for Simpson-Golabi-Behmel syndrome (SGBS) in humans. Recently it has been shown that the GPC4 gene is tightly clustered with GPC3 on the X chromosome and that some patients with SGBS apparently have deletions affecting both genes. We report here the identification of a human cDNA encoding a novel glypican family member, glypican-6. This cDNA encodes a predicted protein of 554 amino acids and is structurally analogous to other members of the glypican gene family, but most highly related to glypican-4. A single GPC6 mRNA of 6.2 kb is detected most abundantly in the ovary, liver, and kidney, with lower levels of mRNA expression also detected in a wide range of other adult tissues. Radiation hybrid analysis mapped the GPC6 gene to human chromosome 13 very near the GPC5 gene, a member of the glypican family bearing strong similarity to GPC3.
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