A study of the expression of germline-specific paralogs of the ubiquitously expressed NAC complex revealed their association with centrosomes

Author:

Mikhaleva Elena A.,Akulenko Natalia V.,Olenkina Oxana M.,Abramov Yuri A.,Lavrov Sergey A.ORCID,Leinsoo Thoomas A.,Kogan Galina L.,Gvozdev Vladimir A.

Abstract

AbstractProtein homeostasis involves the ubiquitously expressed heterodimeric protein NAC (ribosome associated nascent polypeptide complex), consisting of α- and β-subunits. We previously found inDrosophila melanogasterthe presence of germline-specific paralogous genes for NAC subunits (gNACs): unique for the α-subunit and several highly homologous amplified genes for the β-subunit, indistinguishable by the antibodies used, while they were detected as different phosphorylated isoforms in 2D electrophoresis with immunostaining. The distinct increase in gNAC expression in growing spermatocytes compared with their predecessors, gonioblasts, is accompanied by a clear presence of gNAC in the cytoplasm of dividing meiotic cells and spermatids. In oogenesis, gNAC expression is significantly lower than in the testis, but gNAC accumulation is found at the posterior pole of the mature oocyte, known as the germplasm region responsible for the germ cell formation in the offspring. gNAC-associated ribosomes from mature oocytes are enriched in mRNA sets encoding known germplasm and centrosome proteins. gNAC is also detected in a pericentriolar component of centrosomes: in syncytial dividing nuclei in the early embryos, in primordial germ cells and spermatocytes, including meiotic divisions stage. CRISPR/Cas9-mediated deficiency of the gNAC-alpha subunit causes female infertility. We propose the role of the gNAC phosphoregulatory paralog system as a component of the germline proteostasis network, coordinated with the centrosome functions. Here, we also extended our results by identifying cross-links between ubiquitous and germline-specific NAC-β paralogs, finding an additional case of functional cross-talk between heterodimeric ubNAC and gNAC α-subunit paralogs, which may maintain the robustness of proteostasis and fly fecundity.

Publisher

Cold Spring Harbor Laboratory

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