Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/95053
Title: Structure-function analysis of rgs1 in magnaporthe oryzae : role of DEP domains in subcellular targeting
Authors: Ramanujam, Ravikrishna.
Yishi, Xu.
Liu, Hao.
Naqvi, Naweed Issak.
Issue Date: 2012
Source: Ramanujam, R., Yishi, X., Liu, H., & Naqvi, N. I. (2012). Structure-function analysis of rgs1 in magnaporthe oryzae : role of DEP domains in subcellular targeting. PLoS ONE, 7(7).
Series/Report no.: PLoS ONE
Abstract: Rgs1, a prototypical Regulator of G protein Signaling, negatively modulates the cyclic AMP pathway thereby influencing various aspects of asexual development and pathogenesis in the rice-blast fungus Magnaporthe oryzae. Rgs1 possesses tandem DEP motifs (termed DEP-A and DEP-B; for Dishevelled, Egl-10, Pleckstrin) at the N-terminus, and a Gα-GTP interacting RGS catalytic core domain at the C-terminus. In this study, we focused on gaining further insights into the mechanisms of Rgs1 regulation and subcellular localization by characterizing the role(s) of the individual domains and the full-length protein during asexual development and pathogenesis in Magnaporthe. Methodology/Principal Findings: Utilizing western blot analysis and specific antisera against the N- and C-terminal halves of Rgs1, we identify and report the in vivo endoproteolytic processing/cleavage of full-length Rgs1 that yields an N-terminal DEP and a RGS core domain. Independent expression of the resultant DEP-DEP half (N-Rgs1) or RGS core (C-Rgs1) fragments, failed to complement the rgs1Δ defects in colony morphology, aerial hyphal growth, surface hydrophobicity, conidiation, appressorium formation and infection. Interestingly, the full-length Rgs1-mCherry, as well as the tagged N-terminal DEP domains (individually or in conjunction) localized to distinct punctate vesicular structures in the cytosol, while the catalytic RGS core motif was predominantly vacuolar.
URI: https://hdl.handle.net/10356/95053
http://hdl.handle.net/10220/9214
ISSN: 1932-6203
DOI: 10.1371/journal.pone.0041084
Rights: © 2012 The Authors.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SBS Journal Articles

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