Structure and chromosomal localization of the GPI-anchor synthesis gene PIGF and its pseudogene {Psi}PIGF

Journal Article · Tue Oct 10 04:00:00 EDT 1995 · Genomics

DOI:https://doi.org/10.1006/geno.1995.9929· OSTI ID:443888

Ohishi, Kazuhito; Inoue, Norimitsu; Endo, Yuichi ^[1]

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1. Osaka Univ. (Japan); and others

Posttranslational modification by the GPI glycolipid anchor is essential for the surface expression of many membrane proteins. Defect of GPI biosynthesis due to somatic mutation in the hematopoietic stem cell is the basis for an acquired genetic disease, paroxysmal nocturnal hemoglobinuria (PNH). Previously, an X-linked gene PIGA (phosphatidylinositol glycan class A), which participates in the first step of the biosynthesis, was shown to be mutated in abnormal cells from all 60 patients with PNH. The cDNA of another GPI synthesis gene PIGF was previously cloned, but it is not involved in pathogenesis of PNH. In the present study, we have analyzed PIGF genomic clones. The PIGF gene contained six exons spanning about 40 kb and was located to the short arm of chromosome 2 at 2p16-p21. The frequency of mutations on both alleles of PIGF should be much lower than that of mutation in the X-linked PIGA, accounting for a lack of involvement of PIGF in PNH. We also identified the processed pseudogene of PIGF ({psi}PIGF) and mapped it to 5q35. 13 refs., 3 figs.

• Sponsoring Organization: USDOE
• OSTI ID: 443888
• Journal Information: Genomics, Journal Name: Genomics Journal Issue: 3 Vol. 29; ISSN GNMCEP; ISSN 0888-7543
• Country of Publication: United States
• Language: English

Related Subjects

55 BIOLOGY AND MEDICINE
BASIC STUDIES
AMINO ACID SEQUENCE
BIOSYNTHESIS
DNA HYBRIDIZATION
DNA-CLONING
FLUORESCENCE
GENE MUTATIONS
GENETIC MAPPING
GLYCOLIPIDS
HEMIC DISEASES
HEREDITARY DISEASES
HUMAN CHROMOSOME 2
HUMAN CHROMOSOME 5
HUMAN X CHROMOSOME
MEMBRANE PROTEINS
MUTATION FREQUENCY
SOMATIC MUTATIONS
STEM CELLS
STRUCTURE-ACTIVITY RELATIONSHIPS