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Evaluation of multi-color genetically encoded Ca indicators in filamentous fungi. | LitMetric

Evaluation of multi-color genetically encoded Ca indicators in filamentous fungi.

Fungal Genet Biol

Department of Plant Pathology & Environmental Microbiology, The Pennsylvania State University, University Park, PA 16802, United States. Electronic address:

Published: April 2021

AI Article Synopsis

Article Abstract

Genetically encoded Ca indicators (GECIs) enable long-term monitoring of cellular and subcellular dynamics of this second messenger in response to environmental and developmental cues without relying on exogenous dyes. Continued development and optimization in GECIs, combined with advances in gene manipulation, offer new opportunities for investigating the mechanism of Ca signaling in fungi, ranging from documenting Ca signatures under diverse conditions and genetic backgrounds to evaluating how changes in Ca signature impact calcium-binding proteins and subsequent cellular changes. Here, we attempted to express multi-color (green, yellow, blue, cyan, and red) circularly permuted fluorescent protein (FP)-based Ca indicators driven by multiple fungal promoters in Fusarium oxysporum, F. graminearum, and Neurospora crassa. Several variants were successfully expressed, with GCaMP5G driven by the Magnaporthe oryzae ribosomal protein 27 and F. verticillioides elongation factor-1α gene promoters being optimal for F. graminearum and F. oxysporum, respectively. Transformants expressing GCaMP5G were compared with those expressing YC3.60, a ratiometric Cameleon Ca indicator. Wild-type and three Ca signaling mutants of F. graminearum expressing GCaMP5G exhibited improved signal-to-noise and increased temporal and spatial resolution and are also more amenable to studies involving multiple FPs compared to strains expressing YC3.60.

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Source
http://dx.doi.org/10.1016/j.fgb.2021.103540DOI Listing

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