Journal article
Analysis of 14-3-3 isoforms expressed in photoreceptors
Experimental Eye Research, Vol.170, pp.108-116
05/2018
DOI: 10.1016/j.exer.2018.02.022
PMCID: PMC5924652
PMID: 29486162
Abstract
The 14-3-3 family of proteins has undergone considerable expansion in higher eukaryotes with humans and mice expressing seven isoforms (β, ε, η, γ, θ, ζ, and σ) from seven distinct genes (YWHAB, YWAHE, YWHAH, YWHAG, YWHAQ, YWHAZ, and SFN). Growing evidence indicates that while highly conserved, these isoforms are not entirely functionally redundant as they exhibit unique tissue expression profiles, subcellular localization, and biochemical functions. A key limitation in our understanding of 14-3-3 biology lies in our limited knowledge of cell-type specific 14-3-3 expression. Here we provide a characterization of 14-3-3 expression in whole retina and isolated rod photoreceptors using reverse-transcriptase digital droplet PCR. We find that all 14-3-3 genes with the exception of SFN are expressed in mouse retina with YWHAQ and YWHAE being the most highly expressed. Rod photoreceptors are enriched in YWHAE (14-3-3 ε). Immunohistochemistry revealed that 14-3-3 ε and 14-3-3 ζ exhibit unique distributions in photoreceptors with 14-3-3 ε restricted to the inner segment and 14-3-3 ζ localized to the outer segment. Our data demonstrates that, in the retina, 14-3-3 isoforms likely serve specific functions as they exhibit unique expression levels and cell-type specificity. As such, future investigations into 14-3-3 function in rod photoreceptors should be centered on 14-3-3 ε and 14-3-3 ζ, depending on the subcellular region of question. [Display omitted] •Expression of 14-3-3 isoforms in retina was quantified using digital-droplet PCR.•Only 14-3-3 σ was not found in retina.•14-3-3 antibodies were validated against recombinant proteins.•14-3-3 ε and 14-3-3 ζ were detected in photoreceptors.•14-3-3 ε and 14-3-3 ζ were found enriched in inner vs. outer segments, respectively.
Details
- Title: Subtitle
- Analysis of 14-3-3 isoforms expressed in photoreceptors
- Creators
- Shivangi M Inamdar - Department of Biochemistry, University of Iowa, Iowa City, IA 52242, USAColten K Lankford - Department of Biochemistry, University of Iowa, Iowa City, IA 52242, USAJoseph G Laird - Department of Biochemistry, University of Iowa, Iowa City, IA 52242, USAGulnara Novbatova - Department of Biochemistry, University of Iowa, Iowa City, IA 52242, USANicole Tatro - Department of Ophthalmology & Visual Sciences and Institute for Vision Research, University of Iowa, Iowa City, IA 52242, USAS. Scott Whitmore - Department of Ophthalmology & Visual Sciences and Institute for Vision Research, University of Iowa, Iowa City, IA 52242, USATodd E Scheetz - Department of Ophthalmology & Visual Sciences and Institute for Vision Research, University of Iowa, Iowa City, IA 52242, USASheila A Baker - Department of Biochemistry, University of Iowa, Iowa City, IA 52242, USA
- Resource Type
- Journal article
- Publication Details
- Experimental Eye Research, Vol.170, pp.108-116
- DOI
- 10.1016/j.exer.2018.02.022
- PMID
- 29486162
- PMCID
- PMC5924652
- NLM abbreviation
- Exp Eye Res
- ISSN
- 0014-4835
- eISSN
- 1096-0007
- Publisher
- Elsevier Ltd
- Grant note
- DOI: 10.13039/100000002, name: National Institutes of Health, award: EY027054, EY025580; name: Roy J Carver, Jr. Chair in Bioinformatics and Computational Biology (TES)
- Language
- English
- Date published
- 05/2018
- Academic Unit
- Roy J. Carver Department of Biomedical Engineering; Electrical and Computer Engineering; Iowa Neuroscience Institute; Biochemistry and Molecular Biology; Ophthalmology and Visual Sciences
- Record Identifier
- 9983979962002771
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