Type II metacaspase protein localization and gene transcription during programmed cell semi-death of sieve elements in developing caryopsis of Tritium aestivum

Zhang, Zhihui; Lv, Yan; Zhou, Zhuqing; Mei, Fangzhu; Wang, Likai

doi:10.1515/biolog-2017-0041

Biologia

2017

DOI: 10.1515/biolog-2017-0041

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Type II metacaspase protein localization and gene transcription during programmed cell semi-death of sieve elements in developing caryopsis of Tritium aestivum

Zhihui Zhang

Yan Lv

Zhuqing Zhou

et al.

Abstract: Metacaspases are cysteine-dependent proteases essential in plant PCD. This study focused on PCD features, the metacaspase II protein (TaeMCAII) and its gene expression and dynamic distribution during the developmental process of wheat sieve elements (SEs). Our results showed that the SEs experienced enucleation, inclusion loss, cell wall thickening and decreased cytosol density during their development. The RT-qPCR and

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Cited by 2 publications

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Genome-wide identification, characterization, and transcriptional analysis of the metacaspase gene family in cucumber (Cucumis sativus)

Zhou

Jiang

et al. 2018

Genome

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Metacaspase (MC), a family of caspase-like proteins, plays vital roles in regulating programmed cell death (PCD) during development and in response to stresses in plants. In this study, five MC genes (designated as CsMC1 to CsMC5) were identified in the cucumber (Cucumis sativus) genome. Sequence analysis revealed that CsMC1-CsMC3 belong to type I MC proteins, while CsMC4 and CsMC5 are type II MC proteins. Phylogenetic tree and conserved motif analysis of MC proteins indicated that these proteins can be classified into two groups, which are correlated with the types of these MC proteins. Gene structure analysis demonstrated that type I CsMC genes contain 4-7 introns, while all type II CsMC genes harbor one intron. In addition, many hormone-, stress-, and development-related cis-elements were identified in the promoter regions of CsMC genes. Expression analysis using RNA-seq data revealed that CsMC genes have distinct expression patterns in various tissues and developmental stages. qRT-PCR results showed that the transcript levels of CsMC genes could be regulated by various abiotic stresses such as NaCl, PEG, and cold. These results demonstrate that the cucumber MC gene family may function in tissue development and plant stress responses.

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Genome-wide identification, characterization, and transcriptional analysis of the metacaspase gene family in cucumber (Cucumis sativus)

Zhou

Jiang

et al. 2018

Genome

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Evolutionary Diversity and Function of Metacaspases in Plants: Similar to but Not Caspases

Huh

2022

IJMS

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Caspase is a well-studied metazoan protease involved in programmed cell death and immunity in animals. Obviously, homologues of caspases with evolutionarily similar sequences and functions should exist in plants, and yet, they do not exist in plants. Plants contain structural homologues of caspases called metacaspases, which differ from animal caspases in a rather distinct way. Metacaspases, a family of cysteine proteases, play critical roles in programmed cell death during plant development and defense responses. Plant metacaspases are further subdivided into types I, II, and III. In the type I Arabidopsis MCs, AtMC1 and AtMC2 have similar structures, but antagonistically regulate hypersensitive response cell death upon immune receptor activation. This regulatory action is similar to caspase-1 inhibition by caspase-12 in animals. However, so far very little is known about the biological function of the other plant metacaspases. From the increased availability of genomic data, the number of metacaspases in the genomes of various plant species varies from 1 in green algae to 15 in Glycine max. It is implied that the functions of plant metacaspases will vary due to these diverse evolutions. This review is presented to comparatively analyze the evolution and function of plant metacaspases compared to caspases.

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Type II metacaspase protein localization and gene transcription during programmed cell semi-death of sieve elements in developing caryopsis of Tritium aestivum

Cited by 2 publications

References 32 publications

Genome-wide identification, characterization, and transcriptional analysis of the metacaspase gene family in cucumber (Cucumis sativus)

Genome-wide identification, characterization, and transcriptional analysis of the metacaspase gene family in cucumber (Cucumis sativus)

Evolutionary Diversity and Function of Metacaspases in Plants: Similar to but Not Caspases

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