2014
DOI: 10.3389/fpls.2014.00058
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Endoplasmic reticulum KDEL-tailed cysteine endopeptidase 1 of Arabidopsis (AtCEP1) is involved in pathogen defense

Abstract: Programmed cell death (PCD) is a genetically determined process in all multicellular organisms. Plant PCD is effected by a unique group of papain-type cysteine endopeptidases (CysEP) with a C-terminal KDEL endoplasmic reticulum (ER) retention signal (KDEL CysEP). KDEL CysEPs can be stored as pro-enzymes in ER-derived endomembrane compartments and are released as mature CysEPs in the final stages of organelle disintegration. KDEL CysEPs accept a wide variety of amino acids at the active site, including the glyc… Show more

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Cited by 41 publications
(58 citation statements)
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References 60 publications
(92 reference statements)
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“…Infected-cell-specific death has been observed in the wild type attacked by adapted powdery mildew fungus (Höwing et al, 2014). The increased frequency of infected-cell-specific death and increased amplitude of PR1 induction in ADF1-4Ri appear to suggest the increased basal defense level and primed defense response in ADF1-4Ri and, possibly, in adf4.…”
Section: Discussionmentioning
confidence: 92%
“…Infected-cell-specific death has been observed in the wild type attacked by adapted powdery mildew fungus (Höwing et al, 2014). The increased frequency of infected-cell-specific death and increased amplitude of PR1 induction in ADF1-4Ri appear to suggest the increased basal defense level and primed defense response in ADF1-4Ri and, possibly, in adf4.…”
Section: Discussionmentioning
confidence: 92%
“…These observations and the expression pattern of To elucidate the role of cysteine endoproteases during flower senescence, genes of cysteine protease that up-regulate during flower senescence, have been cloned from the petals of Dianthus caryophyllus (Jones et al 1995), Hemerocallis (Valpuesta et al 1995;Guerrero et al 1998), Alstroemeria peruviana (Wagstaff et al 2002), Sandersonia aurantiaca (Eason et al 2002), Narcissus pseudonarcissus (Hunter et al 2007), and Gladiolus grandiflora (Arora and Singh 2004). It has been found that many of the senescence associated cysteine proteases are KDELCysEPs (Helm et al 2008;Höwing et al 2014). KDELCysEPs belong to an important group of cysteine endoproteases that are unique to plants by a characteristic C-terminal KDEL sequence directing retention in the endoplasmic reticulum (ER) (Helm et al 2008;Höwing et al 2014;Battelli et al 2014).…”
Section: Discussionmentioning
confidence: 99%
“…Previous studies showed two different localization patterns of CEP1 in different tissues. CEP1 showed ER pattern in transgenic Arabidopsis roots (Höwing et al, 2014) but vacuole pattern in tapetal cells . Due to the tissue-specific localization pattern of CEP1, the possible effects of mon1 on the vacuolar transport of CEP1 in tapetum can be done in future research using transgenic Arabidopsis plants expressing GFP-tagged CEP1 driven by tapetum-specific promoter in the wild type and mon1.…”
Section: Discussionmentioning
confidence: 99%