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Genome. 1989 Apr;32(2):190-5.

Identification of a heat-shock pseudogene from Caenorhabditis elegans.

Author information

1
Department of Biological Sciences, Simon Fraser University, Burnaby, B.C., Canada.

Abstract

While characterizing the hsp70 gene family from Caenorhabditis elegans we encountered an unusual member of this family. Sequence data reveal that the hsp-2ps gene is a pseudogene of the constitutively expressed, heat-inducible hsp-1 gene. Two stop codons generated near the 5' end of the sequence as well as several frameshift mutations and a large internal deletion confirm the identification of hsp-2ps as a pseudogene. The nucleotide substitution rate of the third codon position was twice that of the first and second codon positions, suggesting that the hsp-2ps gene was nonfunctional since the time of the duplication event. The hsp-2ps gene duplicates a region of the hsp-1 gene that lies exclusively within the transcribed region and retains the introns. We feel that the hsp-2ps gene was produced by a transpositional duplication event, which occurred approximately 8.5 million years ago.

PMID:
2744444
DOI:
10.1139/g89-428
[Indexed for MEDLINE]

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