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Single-Cell Alternative Splicing Analysis with Expedition Reveals Splicing Dynamics during Neuron Differentiation.

Abstract：

:Alternative splicing (AS) generates isoform diversity for cellular identity and homeostasis in multicellular life. Although AS variation has been observed among single cells, little is known about the biological or evolutionary significance of such variation. We developed Expedition, a computational framework consisting of outrigger, a de novo splice graph transversal algorithm to detect AS; anchor, a Bayesian approach to assign modalities; and bonvoyage, a visualization tool using non-negative matrix factorization to display modality changes. Applying Expedition to single pluripotent stem cells undergoing neuronal differentiation, we discover that up to 20% of AS exons exhibit bimodality. Bimodal exons are flanked by more conserved intronic sequences harboring distinct cis-regulatory motifs, constitute much of cell-type-specific splicing, are highly dynamic during cellular transitions, preserve reading frame, and reveal intricacy of cell states invisible to conventional gene expression analysis. Systematic AS characterization in single cells redefines our understanding of AS complexity in cell biology.

journal_name

Mol Cell

journal_title

Molecular cell

authors

Song Y,Botvinnik OB,Lovci MT,Kakaradov B,Liu P,Xu JL,Yeo GW

doi

10.1016/j.molcel.2017.06.003

subject

Has Abstract

pub_date

2017-07-06 00:00:00

pages

148-161.e5

issue

1

eissn

1097-2765

issn

1097-4164

pii

S1097-2765(17)30405-7

journal_volume

67

pub_type

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