Preliminary characterisation of esterase and platelet-activating factor (PAF)-acetylhydrolase activities from cat flea (Ctenocephalides felis) salivary glands

Biomedical and Life Sciences

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https://doi.org/10.1016/S0965-1748(00)00113-2
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Keywords

Cat flea (Ctenocephalides felis), Salivary gland, Saliva, Esterase, Glycoprotein, Platelet-activating factor (PAF) , PAF-acetylhydrolase

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Preliminary characterisation of esterase and platelet-activating factor (PAF)-acetylhydrolase activities from cat flea (Ctenocephalides felis) salivary glands. / Cheeseman, M T; Bates, P A; Crampton, J M.
In: Insect Biochemistry and Molecular Biology, Vol. 31, No. 2, 02.2001, p. 157-164.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Bibtex

@article{df6db604407b4504ad0ed6ad87bf793e,

title = "Preliminary characterisation of esterase and platelet-activating factor (PAF)-acetylhydrolase activities from cat flea (Ctenocephalides felis) salivary glands",

abstract = "Naphthyl esterase and platelet-activating factor (PAF)-acetylhydrolase activities were detected in the salivary glands of the cat flea, Ctenocephalides felis. Salivary naphthyl esterase activity is disgorged during exploratory probing. Whole extracts of salivary glands contain esterase activity against the short-chain naphthyl esters alpha-naphthyl acetate (approximately 210pmol/min/gland pair; 10.0micromol/min/mg specific activity; K(m) approximately 59microM) and beta-naphthyl acetate (approximately 110pmol/min/gland pair; 5.2micromol/min/mg specific activity; K(m) approximately 132microM). Salivary gland extracts have PAF-acetylhydrolase activity (approximately 5pmol/min/gland pair; 0.24micromol/min/mg specific activity) but do not have detectable acetylcholinesterase activity. Native-PAGE and IEF resolve three and six salivary gland naphthyl esterase bands, respectively, and both patterns are different from carcass esterases. Salivary gland naphthyl esterase activity binds reversibly to Concanavalin A, and enzymatic deglycosylation with glycopeptidase F produced a new, fast-migrating salivary gland naphthyl esterase band on Native-PAGE. Renaturation of esterase activity after SDS-PAGE gave approximately 56kDa, approximately 57kDa and approximately 58kDa naphthyl-esterase-positive bands. On gel filtration naphthyl esterase and PAF-acetylhydrolase activities co-elute as a single peak with an apparent molecular weight of approximately 59kDa. This partially purified pool of enzyme had esterase activity against a series of short-chain alpha- and beta-naphthyl esters. The heterogeneity of salivary gland esterases, their relationship to PAF-acetylhydrolase, and the possible physiological functions of salivary gland PAF-acetylhydrolase activity are discussed.",

keywords = "Cat flea (Ctenocephalides felis), Salivary gland, Saliva, Esterase, Glycoprotein, Platelet-activating factor (PAF) , PAF-acetylhydrolase",

author = "Cheeseman, {M T} and Bates, {P A} and Crampton, {J M}",

year = "2001",

month = feb,

doi = "10.1016/S0965-1748(00)00113-2",

language = "English",

volume = "31",

pages = "157--164",

journal = "Insect Biochemistry and Molecular Biology",

issn = "0965-1748",

publisher = "Elsevier Limited",

number = "2",

}

RIS

TY - JOUR

T1 - Preliminary characterisation of esterase and platelet-activating factor (PAF)-acetylhydrolase activities from cat flea (Ctenocephalides felis) salivary glands

AU - Cheeseman, M T

AU - Bates, P A

AU - Crampton, J M

PY - 2001/2

Y1 - 2001/2

N2 - Naphthyl esterase and platelet-activating factor (PAF)-acetylhydrolase activities were detected in the salivary glands of the cat flea, Ctenocephalides felis. Salivary naphthyl esterase activity is disgorged during exploratory probing. Whole extracts of salivary glands contain esterase activity against the short-chain naphthyl esters alpha-naphthyl acetate (approximately 210pmol/min/gland pair; 10.0micromol/min/mg specific activity; K(m) approximately 59microM) and beta-naphthyl acetate (approximately 110pmol/min/gland pair; 5.2micromol/min/mg specific activity; K(m) approximately 132microM). Salivary gland extracts have PAF-acetylhydrolase activity (approximately 5pmol/min/gland pair; 0.24micromol/min/mg specific activity) but do not have detectable acetylcholinesterase activity. Native-PAGE and IEF resolve three and six salivary gland naphthyl esterase bands, respectively, and both patterns are different from carcass esterases. Salivary gland naphthyl esterase activity binds reversibly to Concanavalin A, and enzymatic deglycosylation with glycopeptidase F produced a new, fast-migrating salivary gland naphthyl esterase band on Native-PAGE. Renaturation of esterase activity after SDS-PAGE gave approximately 56kDa, approximately 57kDa and approximately 58kDa naphthyl-esterase-positive bands. On gel filtration naphthyl esterase and PAF-acetylhydrolase activities co-elute as a single peak with an apparent molecular weight of approximately 59kDa. This partially purified pool of enzyme had esterase activity against a series of short-chain alpha- and beta-naphthyl esters. The heterogeneity of salivary gland esterases, their relationship to PAF-acetylhydrolase, and the possible physiological functions of salivary gland PAF-acetylhydrolase activity are discussed.

AB - Naphthyl esterase and platelet-activating factor (PAF)-acetylhydrolase activities were detected in the salivary glands of the cat flea, Ctenocephalides felis. Salivary naphthyl esterase activity is disgorged during exploratory probing. Whole extracts of salivary glands contain esterase activity against the short-chain naphthyl esters alpha-naphthyl acetate (approximately 210pmol/min/gland pair; 10.0micromol/min/mg specific activity; K(m) approximately 59microM) and beta-naphthyl acetate (approximately 110pmol/min/gland pair; 5.2micromol/min/mg specific activity; K(m) approximately 132microM). Salivary gland extracts have PAF-acetylhydrolase activity (approximately 5pmol/min/gland pair; 0.24micromol/min/mg specific activity) but do not have detectable acetylcholinesterase activity. Native-PAGE and IEF resolve three and six salivary gland naphthyl esterase bands, respectively, and both patterns are different from carcass esterases. Salivary gland naphthyl esterase activity binds reversibly to Concanavalin A, and enzymatic deglycosylation with glycopeptidase F produced a new, fast-migrating salivary gland naphthyl esterase band on Native-PAGE. Renaturation of esterase activity after SDS-PAGE gave approximately 56kDa, approximately 57kDa and approximately 58kDa naphthyl-esterase-positive bands. On gel filtration naphthyl esterase and PAF-acetylhydrolase activities co-elute as a single peak with an apparent molecular weight of approximately 59kDa. This partially purified pool of enzyme had esterase activity against a series of short-chain alpha- and beta-naphthyl esters. The heterogeneity of salivary gland esterases, their relationship to PAF-acetylhydrolase, and the possible physiological functions of salivary gland PAF-acetylhydrolase activity are discussed.

KW - Cat flea (Ctenocephalides felis)

KW - Salivary gland

KW - Saliva

KW - Esterase

KW - Glycoprotein

KW - Platelet-activating factor (PAF)

KW - PAF-acetylhydrolase

U2 - 10.1016/S0965-1748(00)00113-2

DO - 10.1016/S0965-1748(00)00113-2

M3 - Journal article

C2 - 11164337

VL - 31

SP - 157

EP - 164

JO - Insect Biochemistry and Molecular Biology

JF - Insect Biochemistry and Molecular Biology

SN - 0965-1748

IS - 2

ER -

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