Premium
Histone and ribosomal RNA repetitive gene clusters of the boll weevil are linked in a tandem array
Author(s) -
Roehrdanz R.,
Heilmann L.,
Senechal P.,
Sears S.,
Evenson P.
Publication year - 2010
Publication title -
insect molecular biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.955
H-Index - 93
eISSN - 1365-2583
pISSN - 0962-1075
DOI - 10.1111/j.1365-2583.2010.01006.x
Subject(s) - biology , genetics , histone , ribosomal rna , 18s ribosomal rna , ribosomal dna , gene cluster , 28s ribosomal rna , anthonomus , gene , rna , botany , ribosome , phylogenetics , curculionidae
Histones are the major protein component of chromatin structure. The histone family is made up of a quintet of proteins, four core histones (H2A, H2B, H3 & H4) and the linker histones (H1). Spacers are found between the coding regions. Among insects this quintet of genes is usually clustered and the clusters are tandemly repeated. Ribosomal DNA contains a cluster of the rRNA sequences 18S, 5.8S and 28S. The rRNA genes are separated by the spacers ITS1, ITS2 and IGS. This cluster is also tandemly repeated. We found that the ribosomal RNA repeat unit of at least two species of Anthonomine weevils, Anthonomus grandis and Anthonomus texanus (Coleoptera: Curculionidae), is interspersed with a block containing the histone gene quintet. The histone genes are situated between the rRNA 18S and 28S genes in what is known as the intergenic spacer region (IGS). The complete reiterated Anthonomus grandis histone‐ribosomal sequence is 16 248 bp.