Aggressive and defensive roles for chitinases

Gw, Gooday

doi:10.1007/978-3-0348-8757-1_11

Cited by 62 publications

(52 citation statements)

References 61 publications

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“…We do not yet have data for GH family 19 chitinases to evaluate their role in virulence in this regard. However, the frequent occurrence of family 19 chitinases in plants and their often noticed anti-fungal activity suggest that these enzymes may primarily be involved in resistance towards fungal pathogens (Gooday, 1999;Kawase et al, 2006). The GH family 18 chitinases of bacteria may exert easily understood roles during infection of chitin-containing hosts, whereas their biological function in hosts lacking chitin cannot be explained simply by chitinolytic activity.…”

Section: Resultsmentioning

confidence: 99%

“…This concerns bacterial pathogens infecting invertebrate hosts that contain chitin as a constituent either of their exoskeleton (arthropods) or their intestinal peritrophic membrane (annelids and some arthropods). This virulence aspect will not be discussed further here, as it falls outside the scope of this review, but it has been dealt with elsewhere (Gooday, 1999). Instead, we will focus on what is known regarding bacterial chitinases and CBPs as virulence factors through their interaction with target substrates other than chitin.…”

Section: Introductionmentioning

confidence: 99%

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Bacterial chitinases and chitin-binding proteins as virulence factors

et al. 2013

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Bacterial chitinases and chitin-binding proteins as virulence factors

et al. 2013

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“…Insect-derived nitrogen constitutes a major part of total nitrogen intake of carnivorous plants (Dixon et al 1980;Juniper 1989;Schulze et al 1997;Millett et al 2003). The chitin cuticle of insect prey was suggested to be a source of nitrogen Gooday 1999), but more on a speculative than on an experimental basis. Previous analyses kept the possibility open that the chitinases observed were derived from microbial sources (Robins and Juniper 1980;Sirova et al 2003).…”

Section: Discussionmentioning

confidence: 99%

Tentacles of in vitro-grown round-leaf sundew (Drosera rotundifoliaL.) show induction of chitinase activity upon mimicking the presence of prey

Matušíková

Salaj

Moravčíková

et al. 2005

Planta

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Induction of plant-derived chitinases in the leaves of a carnivorous plant was demonstrated using aseptically grown round-leaf sundew (Drosera rotundifolia L.). The presence of insect prey was mimicked by placing the chemical inducers gelatine, salicylic acid and crustacean chitin on leaves. In addition, mechanical stirring of tentacles was performed. Chitinase activity was markedly increased in leaf exudates upon application of notably chitin. Application of gelatine increased the proteolytic activity of leaf exudates, indicating that the reaction of sundew leaves depends on the molecular nature of the inducer applied. In situ hybridization of sundew leaves with a Drosera chitinase probe showed chitinase gene expression in different cell types of nontreated leaves, but not in the secretory cells of the glandular heads. Upon induction, chitinase mRNA was also present in the secretory cells of the sundew leaf. The combined results indicate that chitinase is likely to be involved in the decomposition of insect prey by carnivorous plants. This adds a novel role to the already broad function of chitinases in the plant kingdom and may contribute to our understanding of the molecular mechanisms behind the ecological success of carnivorous plants in nutritionally poor environments.

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“…Chitin is the most abundant glycopolymer constituting the integument including the shells of crustaceans, insect exoskeleton, microfilarial sheath of parasitic nematodes, cell wall of most fungi, and spore shell of microsporidia [4,7,16]. Chitinases are ubiquitous chitin-fragmenting hydrolases and produced by a vast array of organisms [5].…”

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confidence: 99%

Quantitative Changes in Serum Concentration of Bovine Gut Chitinase in Theileria Infection

Fujimoto

Kimura

Suzuki

et al. 2004

The Journal of Veterinary Medical Science

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ABSTRACT. Bovine gut chitinase is exclusively produced in the liver and secreted into the blood. In the present study, we established a semi-quantitative method by Western blot analysis for measurement of the chitinase content in blood and examined its alteration during postnatal development and experimental infection with hemoprotozoan parasite in cattle. Its serum levels from 1 week to 1 year of age showed a significant increase only in 3-4-month-old group. The plasma concentration of the gut chitinase was not changed during acute inflammation caused by lipopolysaccharide but increased gradually after a Theileria injection and peaked at 52 days post-infection. It appears that the increase in the blood chitinase levels might be a defensive response in cattle against protozoan infection. KEY WORDS: bovine serum, chitinase, Theileria sergenti.

show abstract

Aggressive and defensive roles for chitinases

Cited by 62 publications

References 61 publications

Bacterial chitinases and chitin-binding proteins as virulence factors

Bacterial chitinases and chitin-binding proteins as virulence factors

Tentacles of in vitro-grown round-leaf sundew (Drosera rotundifoliaL.) show induction of chitinase activity upon mimicking the presence of prey

Quantitative Changes in Serum Concentration of Bovine Gut Chitinase in Theileria Infection

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