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ID: 125175.0, MPI für Pflanzenzüchtungsforschung / Dept. Molecular Plant Genetics (Heinz Saedler)
Ancestry and diversity of BEL1-like homeobox genes revealed by gymnosperm (Gnetum gnemon) homologs
Authors:Becker, A.; Bey, M.; Burglin, T. R.; Saedler, H.; Theissen, G.
Date of Publication (YYYY-MM-DD):2002-10
Title of Journal:Development Genes and Evolution
Journal Abbrev.:Dev. Genes Evol.
Issue / Number:9
Start Page:452
End Page:457
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:BELL-like homeobox genes encode plant-specific transcription factors, at least some of which are important for ovule development. Here we report MELBEL1-MELBEL4, the first BELT- like genes from a non-flowering plant, the gymnosperm Gnetum gnemon. Our analyses suggest that there was already at least one BELL-like gene present in the most recent common ancestor of extant seed plants about 300 million years ago. Multiple sequence alignments revealed that since this time, not only the DNA-binding homeodomain, but also a protein-protein interaction domain upstream of the homeodomain, termed the BEL domain, has been highly conserved. Sequence comparison of the BEL domain with upstream domains that have been conserved in other TALE homeodomain proteins, i.e. MEIS, KNOX, and PBC, revealed only weak sequence similarity. However, since homology has been shown for MEIS, KNOX, and PBC domains and since KNOX and BEL domains directly interact in vivo, it appears likely that the BEL domain was also derived from an ancestral upstream (MEINOX) domain. Electronic Supplementary Material is available if you access this article at http://dx.doi.org/10.1007/s00427-002- 0259-7. On that page (frame on the left side), a link takes you directly to the supplementary material.
Free Keywords:Gnetum gnemon; homeobox; BEL1; evolution; TALE homeodomain
Comment of the Author/Creator:Date: 2002, OCT
External Publication Status:published
Document Type:Article
Communicated by:N.N.
Affiliations:MPI für Pflanzenzüchtungsforschung
External Affiliations:Max Planck Inst Breeding Res, Dept Plant Mol Genet, Carl von; Linne Weg 10, D-50829 Cologne, Germany; Max Planck Inst Breeding Res, Dept Plant Mol Genet, D-50829 Cologne, Germany; Karolinska Inst, Dept Biosci, Novum, S-14189 Huddinge, Sweden
Identifiers:ISI:000179033300006 [ID No:1]
ISSN:0949-944X [ID No:2]
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