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The organization, localization and nucleotide sequence of the histone genes of the midgeChironomus thummi

✍ Scribed by Thomas Hankeln; Erwin R. Schmidt

Publisher: Springer
Year: 1991
Tongue: English
Weight: 924 KB
Volume: 101
Category: Article
ISSN: 0009-5915
DOI: 10.1007/bf00360683

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✦ Synopsis

Several histone gene repeating units containing the genes for histones H1, H2A, H2B, H3 and H4 were isolated by screening a genomic DNA library from the midge Chironomus thummi ssp. thummi. The nucleotide sequence of one complete histone gene repeating unit was determined. This repeating unit contains one copy of each of the five histone genes in the order and orientation (H3 H4) (H2A H2B) H1). The overall length is 6262 bp. The orientation, nucleotide sequence and inferred amino acid sequence as well as the chromosomal arrangement and localization are different from those reported for Drosophila melanogaster. The codon usage also shows marked differences between Chironornus and Drosophila. Thus the histone gene structure reported for Drosophila is not typical of all insects.

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