ALG11 - A new variable DNA marker for sponge phylogeny: Comparison of phylogenetic performances with the 18S rDNA and the COI gene

Frida Belinky, Amir Szitenberg, Itay Goldfarb, Tamar Feldstein, Gert Wörheide, Micha Ilan, Dorothée Huchon*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

28 Scopus citations


Phylogenetic relationships within sponge classes are highly debated. The low phylogenetic signal observed with some current molecular data can be attributed to the use of few markers, usually slowly-evolving, such as the nuclear rDNA genes and the mitochondrial COI gene. In this study, we conducted a bioinformatics search for a new molecular marker. We sought a marker that (1) is likely to have no paralogs; (2) evolves under a fast evolutionary rate; (3) is part of a continuous exonic region; and (4) is flanked by conserved regions. Our search suggested the nuclear ALG11 as a potential suitable marker. We next demonstrated that this marker can indeed be used for solving phylogenetic relationships within sponges. Specifically, we successfully amplified the ALG11 gene from DNA samples of representatives from all four sponge classes as well as from several cnidarian classes. We also amplified the 18S rDNA and the COI gene for these species. Finally, we analyzed the phylogenetic performance of ALG11 to solve sponge relationships compared to and in combination with the nuclear 18S rDNA and the COI mtDNA genes. Interestingly, the ALG11 marker seems to be superior to the widely-used COI marker. Our work thus indicates that the ALG11 marker is a relevant marker which can complement and corroborate the phylogenetic inferences observed with nuclear ribosomal genes. This marker is also expected to contribute to resolving evolutionary relationships of other apparently slow-evolving animal phyla, such as cnidarians.

Original languageEnglish
Pages (from-to)702-713
Number of pages12
JournalMolecular Phylogenetics and Evolution
Issue number3
StatePublished - Jun 2012


FundersFunder number
National Science Foundation-0905606
National Science Foundation
National Evolutionary Synthesis Center
Deutsche ForschungsgemeinschaftWo896/6, 1-4
Deutsche Forschungsgemeinschaft
Israel Science Foundation600/06
Israel Science Foundation
Tel Aviv University
Ministry of Culture and Sport


    • 18S rDNA
    • ALG11
    • COI
    • Cnidaria
    • Molecular phylogeny
    • Porifera
    • Saturation


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