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Genes encoding human killer-cell Ig-like receptors with D1 and D2 extracellular domains all contain untranslated pseudoexons encoding a third Ig-like domain
- Source :
- Immunogenetics. 51(8-9)
- Publication Year :
- 2000
-
Abstract
- Human killer-cell immunoglobulin-like receptors (KIR) show three types of organization of their extracellular domains: D0-D1-D2 in KIR3D, D1-D2 in the majority of KIR2D, and D0-D2 in KIR2DL4 and the novel KIR2DL5. The gene for a KIR2DL3 variant, which has a D1-D2 structure, has been shown previously to have a nonexpressed region (pseudoexon 3) that is paralogous to the exon encoding the D0 domain of other KIR. This pseudoexon is not expressed because it is skipped during splicing of pre-mRNA. In this study, we demonstrate that all eight genes encoding human KIR with D1-D2 configuration (KIR2DL1-KIR2DL3, KIR2DS1-KIR2DS5) have similarly untranslated pseudoexons. Whereas the pseudoexons of four of these KIR genes bear nonsense mutations and/or altered splicing sites, the pseudoexons in the other four KIR genes have no major structural abnormalities, indicating that other mechanisms are responsible for inactivation of their exons 3. A comparison of the sequences on pseudoexons 3 with the paralogous expressed exons suggests that an exonic splicing enhancer may be necessary for the expression of exon 3 in KIR genes.
- Subjects :
- Adult
DNA, Complementary
Pseudogene
Immunology
Nonsense mutation
Molecular Sequence Data
Exonic splicing enhancer
chemical and pharmacologic phenomena
Biology
KIR2DL4
Exon
KIR2DL1
Receptors, KIR
Sequence Homology, Nucleic Acid
otorhinolaryngologic diseases
Genetics
Tumor Cells, Cultured
Humans
Receptors, Immunologic
Gene
Base Sequence
Exons
Protein Structure, Tertiary
Killer Cells, Natural
Receptors, KIR2DL4
Receptors, KIR2DL3
Protein Biosynthesis
RNA splicing
Receptors, KIR2DL1
Pseudogenes
Subjects
Details
- ISSN :
- 00937711
- Volume :
- 51
- Issue :
- 8-9
- Database :
- OpenAIRE
- Journal :
- Immunogenetics
- Accession number :
- edsair.doi.dedup.....dc2bd6290e9401496c7e993478f15b9c