Distinct roles of two eIF4E isoforms in the germline of Caenorhabditis elegans

Author:

Huggins Hayden P.1,Subash Jacob S.1,Stoffel Hamilton1,Henderson Melissa A.2,Hoffman Jenna L.1,Buckner David S.1,Sengupta Madhu S.3,Boag Peter R.3ORCID,Lee Myon-Hee4ORCID,Keiper Brett D.1ORCID

Affiliation:

1. Department of Biochemistry and Molecular Biology, Brody School of Medicine at East Carolina University, Greenville, NC 27834, USA

2. Department of Molecular Sciences, DeBusk College of Osteopathic Medicine, Lincoln Memorial University, Harrogate, TN 37752, USA

3. Monash Biomedicine Discovery Institute and Department of Biochemistry & Molecular Biology, Monash University, Melbourne, Australia

4. Department of Internal Medicine, Brody School of Medicine at East Carolina University, Greenville, NC 27834, USA

Abstract

Germ cells use both positive and negative mRNA translational control to regulate gene expression that drives their differentiation into gametes. mRNA translational control is mediated by RNA-binding proteins, miRNAs, and translation initiation factors. We have uncovered the discrete roles of two translation initiation factor eIF4E isoforms (IFE-1 and -3) that bind m7GTP mRNA caps during C. elegans germline development. IFE-3 plays important roles in germline sex determination (GSD), where it promotes oocyte cell fate and is dispensable for spermatogenesis. IFE-3 is expressed throughout the germline, localizes to germ granules but distinct from IFE-1 and PGL-1, and facilitates oocyte growth and viability. This contrasts with the robust expression of IFE-1 in spermatocytes, the isoform that resides within P granules in spermatocytes and oocytes, and promotes late spermatogenesis. Each eIF4E is localized by its cognate eIF4E binding protein (IFE-1:PGL-1 and IFE-3:IFET-1). IFE-3 and IFET-1 regulate translation of several GSD mRNAs, but not those under control of IFE-1. Distinct mutant phenotypes, in vivo localization, and differential mRNA translation suggest independent dormant and active periods for each eIF4E isoform in the germline.

Funder

National Science Foundation

National Institutes of Health

Publisher

The Company of Biologists

Subject

Cell Biology

Cited by 16 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3