Haplotype-specific sequence encoding the protein kinase, interferon-inducible double-stranded RNA-dependent activator in the human leukocyte antigen class II region.

Abstract:

:The protein kinase, interferon-inducible double-stranded (ds)RNA-dependent activator (PRKRA) is a dsRNA-binding protein which activates a protein kinase participating in the antiviral activity of interferon. Our previous studies indicated that the nucleotide sequence encoding PRKRA, which appeared to be an intronless gene, was present in PAC HS265J14 containing the human leukocyte antigen (HLA) DR subregion. In this study, we further investigated and characterized the PRKRA gene on the human genome by means of Southern blotting and polymerase chain reaction with homozygous typing cell lines for HLA genes. Results indicated that the presence of PRKRA in the DR subregion was dependent on the DR53 group. Consistently, fluorescence in situ hybridization profiles with PRKRA as a probe showed that the hybridization signal on Chromosome (Chr) 6p21.3 was seen only in the samples carrying the DR haplotypes that belonged to the DR53 group. Interestingly, another hybridization signal, which was mapped on Chr 2q31.2-q32.1, was always detected in the samples examined, i.e., even in the samples negative for the DR53 group. The outcome of a sequence-database homology search further indicated that the PRKRA gene with introns appeared to be present in a recently opened draft-sequence, RP11-65L3 (GenBank accession number AC009948), which is located between D2S335 and D2S2257. Together, the data presented here indicate that the PRKRA gene in the DR subregion is a processed pseudogene (PRKRApsi), which could have been generated only on the DR53 common ancestor's genome, and that the master copy of PRKRApsi is most probably present on Chr 2q31.2-q32.1.

journal_name

Immunogenetics

journal_title

Immunogenetics

authors

Chida S,Hohjoh H,Hirai M,Tokunaga K

doi

10.1007/s002510000270

subject

Has Abstract

pub_date

2001-01-01 00:00:00

pages

186-94

issue

3-4

eissn

0093-7711

issn

1432-1211

journal_volume

52

pub_type

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