Identification of a PIG-A related processed gene on chromosome 12.

Abstract:

:PIG-A, the gene encoding the glycoinositol phospholipid anchor synthetic element that is defective in paroxysmal nocturnal hemoglobinuria (PNH), resides on the X chromosome. In the course of analyses of PIG-A genetic alterations in PNH patients, polymerase chain reaction (PCR) amplification of reverse-transcribed RNA from affected leukocytes of a patient with diminished PIG-A mRNA expression yielded a PIG-A related sequence with 126 nucleotide substitutions and five deletions. In the present study, the origin of this product was investigated. Selective reverse transcription (RT)/PCR amplifications with primers specific for PIG-A and this variant sequence, analyses of RNA from unaffected cells, and differential endonuclease digestions showed that mRNA with this sequence is coexpressed with PIG-A mRNA in a wide range of cell types. Mapping of genomic DNA from human/rodent hybrids showed that the sequence derives from a processed gene, designated PIG-A-II, that is encoded on chromosome 12.

journal_name

Hum Genet

journal_title

Human genetics

authors

Nagarajan S,Brown CJ,Medof ME

doi

10.1007/BF00209489

subject

Has Abstract

pub_date

1995-06-01 00:00:00

pages

691-7

issue

6

eissn

0340-6717

issn

1432-1203

journal_volume

95

pub_type

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