title: Characterization of TrcMADS1 gene of Trillium camtschatcense (Trilliaceae) reveals functional evolution of the SOC1/TM3-like gene family.
abstract: Plant MADS-box genes encode transcriptional regulators that are critical for a number of developmental processes, such as the establishment of floral organ identity, flowering time, and fruit development. It appears that the MADS-box gene family has undergone considerable gene duplication and divergence within various angiosperm lineages. SUPPRESSOR OF OVEREXPRESSION OF CONSTANS 1 (SOC1)/Tomato MADS-box gene 3 (TM3)-like genes are members of the MADS-box gene family and have undergone repeated duplication events. Here, we isolated and characterized the SOC1/TM3-like gene TrcMADS1 from Trillium camtschatcense (Trilliaceae) to infer the ancestral function of SOC1/TM3-like genes. The alignment of SOC1/TM3-like genes revealed the presence of a highly conserved region in the C-terminal of predicted protein sequences, designated the SOC1 motif. Phylogenetic analysis indicated that TrcMADS1 is at the basal position of the SOC1/TM3-like gene family. The TrcMADS1 mRNA was detected in both vegetative and reproductive organs by RT-PCR. Our results suggest that duplicated copies of SOC1/TM3-like gene evolved to become variously functionally specialized.
authors.affiliation: Graduate School of Life Sciences, Tohoku University, Sendai, Japan.
authors.forename: Toru
authors.initials: T
authors.lastname: Nakamura
authors.forename: In-Ja
authors.initials: IJ
authors.lastname: Song
authors.forename: Tatsuya
authors.initials: T
authors.lastname: Fukuda
authors.forename: Jun
authors.initials: J
authors.lastname: Yokoyama
authors.forename: Masayuki
authors.initials: M
authors.lastname: Maki
authors.forename: Toshinori
authors.initials: T
authors.lastname: Ochiai
authors.forename: Toshiaki
authors.initials: T
authors.lastname: Kameya
authors.forename: Akira
authors.initials: A
authors.lastname: Kanno
mesh_terms: D000595:Amino Acid Sequence; D017124:Conserved Sequence; D019143:Evolution, Molecular; D026161:MADS Domain Proteins / Q000235:genetics*; D008969:Molecular Sequence Data; D005810:Multigene Family; D010802:Phylogeny; D010940:Plant Proteins / Q000235:genetics*; D016415:Sequence Alignment; D017386:Sequence Homology, Amino Acid; D031446:Trillium / Q000235:genetics*
chemical_list: D026161:MADS Domain Proteins; D010940:Plant Proteins