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In vitro reconstruction of the Aspergillus (= Emericella) nidulans genome

Author:
Prade, R.A., Griffith, J., Kochut, K., Arnold, J., Timberlake, W.E.
Source:
Proceedings of the National Academy of Sciences of the United States of America 1997 v.94 no.26 pp. 14564-14569
ISSN:
0027-8424
Subject:
Aspergillus nidulellus, chromosome mapping, genome, repetitive sequences
Abstract:
A physical map of the 31-megabase Aspergillus nidulans genome is reported, in which 94% of 5,134 cosmids are assigned to 49 contiguous segments. The physical map is the result of a two-way ordering process, in which clones and probes were ordered simultaneously on a binary DNA/DNA hybridization matrix. Compression by elimination of redundant clones resulted in a minimal map, which is a chromosome walk. Repetitive DNA is nonrandomly dispersed in the A. nidulans genome, reminiscent of heterochromatic banding patterns of higher eukaryotes. We hypothesize gene clusters may arise by horizontal transfer and spread by transposition to explain the nonrandom pattern of repeats along chromosomes.
Agid:
2356777