A Contiguous 60 Kb Genomic Stretch from Barley Reveals Molecular Evidence for Gene Islands in a Monocot Genome

Overview

Journal Nucleic Acids Res

Publisher Oxford University Press

Specialty Biochemistry

Date 1998 Mar 21

PMID 9461468

Citations 54

Authors

R Panstruga

R Buschges

P Piffanelli

P Schulze-Lefert

Affiliations

Soon will be listed here.

Abstract

The contiguous DNA sequence of a 60 kb genomic interval of barley chromosome 4HL has been assembled. The region harbours a single and novel gypsy -like retrotransposon, designated BAGY-1. Only three genes appear to reside in the genomic stretch. One predicts a plant homologue of ribophorin I, a subunit of the oligosaccharyltransferase-protein complex located in the rough endoplasmatic reticulum. The second is similar to the Drosophila g1 gene encoding a ring finger protein involved in developmental processes. The observed gene density is approximately 5-fold lower than in the best characterized dicot genome of Arabidopsis but 6- to 10-fold higher than expected from an equidistant gene distribution in the complex barley genome. Our data suggest that the 60 kb genomic interval represents part of a gene island, a seemingly distinctive feature of grass genomes.

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