ORIGINAL RESEARCH published: 21 April 2015 doi: 10.3389/fpls.2015.00268 Structure, expression profile and phylogenetic inference of chalcone isomerase-like genes from the narrow-leafed lupin (Lupinus angustifolius L.) genome Łucja Przysiecka 1, 2, Michał Ksi ˛azkiewicz˙ 1*, Bogdan Wolko 1 and Barbara Naganowska 1 1 Department of Genomics, Institute of Plant Genetics of the Polish Academy of Sciences, Poznan,´ Poland, 2 NanoBioMedical Centre, Adam Mickiewicz University, Poznan,´ Poland Edited by: Lupins, like other legumes, have a unique biosynthesis scheme of 5-deoxy-type Richard A. Jorgensen, flavonoids and isoflavonoids. A key enzyme in this pathway is chalcone isomerase University of Arizona, USA (CHI), a member of CHI-fold protein family, encompassing subfamilies of CHI1, Reviewed by: Martin Lohr, CHI2, CHI-like (CHIL), and fatty acid-binding (FAP) proteins. Here, two Lupinus Johannes Gutenberg angustifolius (narrow-leafed lupin) CHILs, LangCHIL1 and LangCHIL2, were identified University, Germany and characterized using DNA fingerprinting, cytogenetic and linkage mapping, Jean-Philippe Vielle-Calzada, CINVESTAV, Mexico sequencing and expression profiling. Clones carrying CHIL sequences were assembled *Correspondence: into two contigs. Full gene sequences were obtained from these contigs, and mapped Michał Ksi ˛azkiewicz,˙ in two L. angustifolius linkage groups by gene-specific markers. Bacterial artificial Department of Genomics, Institute of Plant Genetics of the Polish Academy chromosome fluorescence in situ hybridization approach confirmed the localization of of Sciences, Strzeszynska´ 34, two LangCHIL genes in distinct chromosomes. The expression profiles of both LangCHIL Poznan´ 60-479, Poland isoforms were very similar. The highest level of transcription was in the roots of the third
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