The L1TD1 protein interactome reveals the importance of post-transcriptional regulation in human pluripotency

Stem Cell Reports. 2015 Mar 10;4(3):519-28. doi: 10.1016/j.stemcr.2015.01.014. Epub 2015 Feb 19.

Abstract

The RNA-binding protein L1TD1 is one of the most specific and abundant proteins in pluripotent stem cells and is essential for the maintenance of pluripotency in human cells. Here, we identify the protein interaction network of L1TD1 in human embryonic stem cells (hESCs) and provide insights into the interactome network constructed in human pluripotent cells. Our data reveal that L1TD1 has an important role in RNA splicing, translation, protein traffic, and degradation. L1TD1 interacts with multiple stem-cell-specific proteins, many of which are still uncharacterized in the context of development. Further, we show that L1TD1 is a part of the pluripotency interactome network of OCT4, SOX2, and NANOG, bridging nuclear and cytoplasmic regulation and highlighting the importance of RNA biology in pluripotency.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Amino Acid Sequence
  • Carrier Proteins / chemistry
  • Carrier Proteins / genetics
  • Carrier Proteins / metabolism*
  • Cell Nucleus / metabolism
  • Cell Self Renewal / drug effects
  • Cell Self Renewal / genetics
  • Cytoplasm / metabolism
  • Gene Expression Regulation*
  • Humans
  • Molecular Sequence Data
  • Pluripotent Stem Cells / cytology*
  • Pluripotent Stem Cells / drug effects
  • Pluripotent Stem Cells / metabolism*
  • Proteasome Inhibitors / pharmacology
  • Protein Binding
  • Protein Interaction Domains and Motifs
  • Protein Interaction Mapping*
  • Protein Interaction Maps
  • Protein Transport
  • Proteins / chemistry
  • Proteins / metabolism*
  • RNA Processing, Post-Transcriptional*
  • RNA-Binding Proteins / genetics
  • RNA-Binding Proteins / metabolism

Substances

  • Carrier Proteins
  • L1TD1 protein, human
  • Proteasome Inhibitors
  • Proteins
  • RNA-Binding Proteins