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  • Phospholipase A2 in Cnidaria

    Author(s)
    Nevalainen, TJ
    Peuravuori, HJ
    Quinn, RJ
    Llewellyn, LE
    Benzie, JAH
    Fenner, PJ
    Winkel, KD
    Griffith University Author(s)
    Quinn, Ronald J.
    Nevalainen, Timo J.
    Year published
    2004
    Metadata
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    Abstract
    Phospholipase A2 (PLA2) is an enzyme present in snake and other venoms and body fluids. We measured PLA2 catalytic activity in tissue homogenates of 22 species representing the classes Anthozoa, Hydrozoa, Scyphozoa and Cubozoa of the phylum Cnidaria. High PLA2 levels were found in the hydrozoan fire coral Millepora sp. (median 735 U/g protein) and the stony coral Pocillopora damicornis (693 U/g) that cause skin irritation upon contact. High levels of PLA2 activity were also found in the acontia of the sea anemone Adamsia carciniopados (293 U/g). Acontia are long threads containing nematocysts and are used in defense and ...
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    Phospholipase A2 (PLA2) is an enzyme present in snake and other venoms and body fluids. We measured PLA2 catalytic activity in tissue homogenates of 22 species representing the classes Anthozoa, Hydrozoa, Scyphozoa and Cubozoa of the phylum Cnidaria. High PLA2 levels were found in the hydrozoan fire coral Millepora sp. (median 735 U/g protein) and the stony coral Pocillopora damicornis (693 U/g) that cause skin irritation upon contact. High levels of PLA2 activity were also found in the acontia of the sea anemone Adamsia carciniopados (293 U/g). Acontia are long threads containing nematocysts and are used in defense and aggression by the animal. Tentacles of scyphozoan and cubozoan species had high PLA2 activity levels: those of the multitentacled box jellyfish Chironex fleckeri contained 184 U/g PLA2 activity. The functions of cnidarian PLA2 may include roles in the capture and digestion of prey and defense of the animal. The current observations support the idea that cnidarian PLA2 may participate in the sting site irritation and systemic envenomation syndrome resulting from contact with cnidarians.
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    Journal Title
    Comparative Biochemistry and Physiology Part B
    Volume
    139
    Publisher URI
    http://www.elsevier.com/wps/find/journaldescription.cws_home/525465/description#description
    DOI
    https://doi.org/10.1016/j.cbpc.2004.09.006
    Subject
    History and Archaeology
    Biochemistry and Cell Biology
    Physiology
    Publication URI
    http://hdl.handle.net/10072/5055
    Collection
    • Journal articles

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