Pak J Biol Sci 2015 Apr 01;184:149-65. doi: 10.3923/pjbs.2015.149.165.

Identification and Bioinformatics Analyses of the Basic Helix-loop-helix Transcription Factors in Xenopus laevis.

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Xenopus laevis is a long established model organism for developmental, behavioral and neurological studies. Herein, an updated genome-wide survey was conducted using the ongoing genome project of Xenopus laevis and 106 non-redundant Basic Helix-Loop-Helix (bHLH) genes were identified in the Xenopus laevis genome databases. Gene Ontology (GO) enrichment statistics showed 51 significant GO annotations of biological processes and molecular functions and 5 significant KEGG pathways and a number of Xenopus laevis bHLH genes play significant role in specific development or special physiology processes like the development processes of muscle and eye and other organs. Furthermore, each sub-group of the bHLH family has its special gene functions except for the common GO term categories. Molecular phylogenetic analyses revealed that among these identified bHLH proteins, 105 sequences could classified into 39 families with 46, 25, 10, 5, 16 and 3 members in the corresponding high-order groups A, B, C, D, E and F, respectively with an addition bHLH member categorized as an orphan. The present study provides much useful information for further researches on Xenopus laevis.

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Species referenced: Xenopus laevis
Genes referenced: gnao1