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  Two ancient classes of MIKC-type MADS-box genes are present in the moss Physcomitrella patens

Henschel, K., Kofuji, R., Hasebe, M., Saedler, H., Munster, T., & Theissen, G. (2002). Two ancient classes of MIKC-type MADS-box genes are present in the moss Physcomitrella patens. Molecular Biology and Evolution, 19(6), 801-814.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0012-3DCF-9 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0012-3DD0-3
Genre: Journal Article

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 Creators:
Henschel, K., Author
Kofuji, R., Author
Hasebe, M., Author
Saedler, H.1, Author              
Munster, T.1, Author              
Theissen, G.1, Author              
Affiliations:
1Dept. of Molecular Plant Genetics (Heinz Saedler), MPI for Plant Breeding Research, Max Planck Society, ou_1113568              

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Free keywords: MADS-box gene; Physcomitrella; moss; evolution
 Abstract: Characterization of seven MADS-box genes, termed PPM1-PPM4 and PpMADS1-PIWADS3, from the moss model species Physcomitrella patens is reported. Phylogeny reconstructions and comparison of exon-intron structures revealed that the genes described here represent two different classes of homologous, yet distinct, MIKC-type MADS-box genes, termed MIKCc-type genes-"(c)"stands for "classic"-(PPM1, PPM2, PpMADS/) and MIKC*type genes (PPM3, PPM4, PpMADS2. PpMADS3). The two gene classes deviate from each other in a characteristic way, especially in a sequence stretch termed intervening region, MIKCc-type genes are abundantly present in all land plants which have been investigated in this respect. and give rise to well-known gene types such as floral meristem and organ identity genes. In contrast, L4MB1 from the clubmoss Lycopodium annotintan was identified as the only other MIKC*-Lype gene published so far. Our findings strongly suggest that the most recent common ancestor of mosses and vascular plants contained at least one MIKCc-type and one MIKC*-type gene. Our studies thus reveal an ancient duplication of an MIKC-type gene that occurred before the separation of the lineages that led to extant mosses and vascular plants more than about 450 MYA. The identification of bona fide K-domains in both MIKCc-type and MIKCc-type proteins suggests that the K- domain is more ancient than is suggested by a recent alternative hypothesis. MIKC"-type genes may have escaped identification in ferns and seed plants so far. It seems more likely, however, that they represent a class of genes which has been lost in the lineage which led to extant ferns and seed plants. The high number of P. patens MADS-box genes and the presence of a K-box in the coding region and of some potential binding sites for MADS-domain proteins and other transcription factors in the putative promoter regions of these genes suggest that MADS-box genes in mosses are involved in complex gene regulatory networks similar to those in flowering plants.

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Language(s): eng - English
 Dates: 2002-06
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: eDoc: 28803
ISI: 000176211700002
 Degree: -

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Title: Molecular Biology and Evolution
  Alternative Title : Mol. Biol. Evol.
Source Genre: Journal
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Pages: - Volume / Issue: 19 (6) Sequence Number: - Start / End Page: 801 - 814 Identifier: ISSN: 0737-4038