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Phytopathogen Type Iii Effector Weaponry And Their Plant Targets, Anna Block, Guangyong Li, Zheng Qing Fu, James R. Alfano
Phytopathogen Type Iii Effector Weaponry And Their Plant Targets, Anna Block, Guangyong Li, Zheng Qing Fu, James R. Alfano
Center for Plant Science Innovation: Faculty and Staff Publications
Phytopathogenic bacteria suppress plant innate immunity and promote pathogenesis by injecting proteins called type III effectors into plant cells using a type III protein secretion system. These type III effectors use at least three major strategies to alter host responses. One strategy is to alter host protein turnover, either by direct cleavage or by modulating ubiquitination and targeting to the 26S proteasome. Another strategy involves alteration of RNA metabolism by transcriptional activation or ADP-ribosylation of RNA-binding proteins. A third major strategy is to inhibit the kinases involved in plant defence signalling, either by removing phosphates or by direct inhibition. The …
The Mut9p Kinase Phosphorylates Histone H3 Threonine 3 And Is Necessary For Heritable Epigenetic Silencing In Chlamydomonas, Juan Casas-Mollano, Byeong-Ryool Jeong, Jianping Xu, Hideaki Moriyama, Heriberto D. Cerutti
The Mut9p Kinase Phosphorylates Histone H3 Threonine 3 And Is Necessary For Heritable Epigenetic Silencing In Chlamydomonas, Juan Casas-Mollano, Byeong-Ryool Jeong, Jianping Xu, Hideaki Moriyama, Heriberto D. Cerutti
Center for Plant Science Innovation: Faculty and Staff Publications
Changes in chromatin organization are emerging as key regulators in nearly every aspect of DNA-templated metabolism in eukaryotes. Histones undergo many, largely reversible, posttranslational modifications that affect chromatin structure. Some modifications, such as trimethylation of histone H3 on Lys 4 (H3K4me3), correlate with transcriptional activation, whereas others, such as methylation of histone H3 on Lys 27 (H3K27me), are associated with silent chromatin. Posttranslational histone modifications may also be involved in the inheritance of chromatin states. Histone phosphorylation has been implicated in a variety of cellular processes but, because of the dynamic nature of this modification, its potential role in long-term …
Ultrastructural Alterations In Arabidopsis Thaliana Dj1c Null Mutant Cotyledons, Han Chen, J. L. Frey, Tara Nazarenus, Christian Elowsky, Julie M. Stone
Ultrastructural Alterations In Arabidopsis Thaliana Dj1c Null Mutant Cotyledons, Han Chen, J. L. Frey, Tara Nazarenus, Christian Elowsky, Julie M. Stone
Center for Plant Science Innovation: Faculty and Staff Publications
Increasing evidence suggests that deficits in mitochondrial function, oxidative and nitrosative stress, accumulation of aberrant or misfolded proteins, and ubiquitin-proteasome system dysfunction may represent the principal molecular pathways that commonly underlie the pathogenesis of neurodegenerative Parkinson’s disease (PD). Mutations in human DJ-1 lead to early onset PD. The subcellular distribution of DJ-1 (PARK7) is primarily cytoplasmic with smaller quantities found associated with mitochondria. Postulated functions include roles in the oxidative stress response, either as a redox sensor protein that can prevent the aggregation of alpha-synuclein or as an antioxidant. Homologs of DJ-1 are found in all kingdoms of life. To …
The Small Glycine-Rich Rna Binding Protein Atgrp7 Promotes Floral Transition In Arabidopsis Thaliana, Corinna Streitner, Selahattin Danisman, Franziska Wehrle, Jan C. Schoning, James R. Alfano, Dorothee Staiger
The Small Glycine-Rich Rna Binding Protein Atgrp7 Promotes Floral Transition In Arabidopsis Thaliana, Corinna Streitner, Selahattin Danisman, Franziska Wehrle, Jan C. Schoning, James R. Alfano, Dorothee Staiger
Center for Plant Science Innovation: Faculty and Staff Publications
The RNA binding protein AtGRP7 is part of a circadian slave oscillator in Arabidopsis thaliana that negatively autoregulates its own mRNA, and affects the levels of other transcripts. Here, we identify a novel role for AtGRP7 as a flowering-time gene. An atgrp7-1 T-DNA mutant flowers later than wild-type plants under both long and short days, and independent RNA interference lines with reduced levels of AtGRP7, and the closely related AtGRP8 protein, are also late flowering, particularly in short photoperiods. Consistent with the retention of a photoperiodic response, the transcript encoding the key photoperiodic regulator CONSTANS oscillates with a similar pattern …