Cytoplasmic polyadenylation by TENT5A is required for proper bone formation

Cell Rep. 2021 Apr 20;35(3):109015. doi: 10.1016/j.celrep.2021.109015.

Abstract

Osteoblasts orchestrate bone formation through the secretion of type I collagen and other constituents of the matrix on which hydroxyapatite crystals mineralize. Here, we show that TENT5A, whose mutations were found in congenital bone disease osteogenesis imperfecta patients, is a cytoplasmic poly(A) polymerase playing a crucial role in regulating bone mineralization. Direct RNA sequencing revealed that TENT5A is induced during osteoblast differentiation and polyadenylates mRNAs encoding Col1α1, Col1α2, and other secreted proteins involved in osteogenesis, increasing their expression. We postulate that TENT5A, possibly together with its paralog TENT5C, is responsible for the wave of cytoplasmic polyadenylation of mRNAs encoding secreted proteins occurring during bone mineralization. Importantly, the Tent5a knockout (KO) mouse line displays bone fragility and skeletal hypomineralization phenotype resulting from quantitative and qualitative collagen defects. Thus, we report a biologically relevant posttranscriptional regulator of collagen production and, more generally, bone formation.

Keywords: FAM46A; Nanopore; TENT5A; collagen; direct RNA sequencing; osteoblasts; osteogenesis; osteogenesis imperfecta; poly(A) tail; polyadenylation.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Calcification, Physiologic / genetics*
  • Cell Differentiation
  • Collagen Type I / genetics
  • Collagen Type I / metabolism
  • Collagen Type I, alpha 1 Chain / genetics
  • Collagen Type I, alpha 1 Chain / metabolism
  • Disease Models, Animal
  • Eye Proteins / genetics
  • Eye Proteins / metabolism
  • Female
  • Gene Expression Regulation, Developmental
  • Humans
  • Male
  • Mice
  • Mice, Knockout
  • Nerve Growth Factors / genetics
  • Nerve Growth Factors / metabolism
  • Nucleotidyltransferases / genetics
  • Nucleotidyltransferases / metabolism
  • Osteoblasts / metabolism*
  • Osteoblasts / pathology
  • Osteogenesis / genetics*
  • Osteogenesis Imperfecta / genetics*
  • Osteogenesis Imperfecta / metabolism
  • Osteogenesis Imperfecta / pathology
  • Osteonectin / genetics
  • Osteonectin / metabolism
  • Polyadenylation
  • Polynucleotide Adenylyltransferase / genetics*
  • Polynucleotide Adenylyltransferase / metabolism
  • Protein Isoforms / deficiency
  • Protein Isoforms / genetics
  • RNA, Messenger / genetics*
  • RNA, Messenger / metabolism
  • Sequence Analysis, RNA
  • Serpins / genetics
  • Serpins / metabolism
  • Signal Transduction

Substances

  • Col1a1 protein, mouse
  • Col1a2 protein, mouse
  • Collagen Type I
  • Collagen Type I, alpha 1 Chain
  • Eye Proteins
  • Nerve Growth Factors
  • Osteonectin
  • Protein Isoforms
  • RNA, Messenger
  • SPARC protein, mouse
  • Serpins
  • pigment epithelium-derived factor
  • Nucleotidyltransferases
  • Tent5c protein, mouse
  • Polynucleotide Adenylyltransferase
  • TENT5A protein, human
  • Tent5A protein, mouse