Phylogenetic origin of LI-cadherin revealed by protein and gene structure 
analysis

Jung, R.; Wendeler, M. W.; Danevad, M.; Himmelbauer, H.; Gessner, R.

doi:10.1007/s00018-004-3470-z

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Phylogenetic origin of LI-cadherin revealed by protein and gene structure analysis

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Himmelbauer, H.
Dept. of Vertebrate Genomics (Head: Hans Lehrach), Max Planck Institute for Molecular Genetics, Max Planck Society;

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Citation

Jung, R., Wendeler, M. W., Danevad, M., Himmelbauer, H., & Gessner, R. (2004). Phylogenetic origin of LI-cadherin revealed by protein and gene structure analysis. Cellular and Molecular Life Science, 61(10), 1157-1166. doi:10.1007/s00018-004-3470-z.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0010-885F-E

Abstract

The intestine specific LI-cadherin differs in its overall structure from classical and desmosomal cadherins by the presence of seven instead of five cadherin repeats and a short cytoplasmic domain. Despite the low sequence similarity, a comparative protein structure analysis revealed that LI-cadherin may have originated from a five-repeat predecessor cadherin by a duplication of the first two aminoterminal repeats. To test this hypothesis, we cloned the murine LI-cadherin gene and compared its structure to that of other cadherins. The intron-exon organization, including the intron positions and phases, is perfectly conserved between repeats 3–7 of LI-cadherin and 1–5 of classical cadherins. Moreover, the genomic structure of the repeats 1–2 and 3–4 is identical for LI-cadherin and highly similar to that of the repeats 1–2 of classical cadherins. These findings strengthen our assumption that LI-cadherin originated from an ancestral cadherin with five domains by a partial gene duplication event.