Interaction between microRNAs and actin-associated protein Arpc5 regulates translational suppression during male germ cell differentiation

Yao Fu Chang, Jennifer S. Lee-Chang, J. Saadi Imam, Kalyan Chakravarthy Buddavarapu, Sarah S. Subaran, Amiya P. Sinha-Hikim, Myriam Gorospe, Manjeet K. Rao

Research output: Contribution to journalArticlepeer-review

23 Scopus citations

Abstract

Decoupling of transcription and translation during postmeiotic germ cell differentiation is critical for successful spermatogenesis. Here we establish that the interaction between microRNAs and actin-associated protein Arpc5 sets the stage for an elaborate translational control mechanism by facilitating the sequestration of germ cell mRNAs into translationally inert ribonucleoprotein particles until they are later translated. Our studies reveal that loss of microRNA-dependent regulation of Arpc5, which controls the distribution of germ cell mRNAs between translationally active and inactive pools, results in abnormal round spermatid differentiation and impaired fertility. Interestingly, Arpc5 functions as a broadly acting translational suppressor, as it inhibits translation initiation by blocking 80S formation and facilitates the transport of mRNAs to chromatoid/P bodies. These findings identify a unique role for actin-associated proteins in translational regulation, and suggest that mRNA-specific and general translational control mechanisms work in tandem to regulate critical germ cell differentiation events and diverse somatic cell functions.

Original languageEnglish (US)
Pages (from-to)5750-5755
Number of pages6
JournalProceedings of the National Academy of Sciences of the United States of America
Volume109
Issue number15
DOIs
StatePublished - Apr 10 2012

Keywords

  • Arp2/3
  • Messenger ribonucleoprotein
  • Processing body
  • Spermiogenesis

ASJC Scopus subject areas

  • General

Fingerprint Dive into the research topics of 'Interaction between microRNAs and actin-associated protein Arpc5 regulates translational suppression during male germ cell differentiation'. Together they form a unique fingerprint.

Cite this