The role of metals in molluscan adhesive gels.

The role of metals in molluscan adhesive gels. Research Abstract Details 

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The role of metals in molluscan adhesive gels. Abstract Text:

S W Werneke,C Swann,L A Farquharson,K S Hamilton,A M Smith,

Several gastropod molluscs produce glues that are interesting because they are dilute gels and yet they produce strong adhesion. Specific glue proteins have been identified that play a central role in this adhesion, possibly by crosslinking other polymers in the gel. This study investigates the role of metals in the action of these glue proteins. Atomic absorption spectrometry showed that glue from the slug Arion subfuscus contains substantial quantities of zinc (46+/-7 p.p.m. and 189+/-80 p.p.m. in two different sets of experiments) and also iron, copper and manganese (2-7 p.p.m.). Iron-specific staining demonstrates that iron is bound specifically to the 15 kDa glue protein. Several approaches were used to show that these metals have important functional effects. Adding iron or copper to dissolved glue causes the proteins to precipitate rapidly, although zinc has no effect. Removing iron and related transition metals with a chelator during secretion of the glue causes a sixfold increase in the solubility of the glue. Once the glue has set, however, removing these metals has no effect. Finally, the gel-stiffening activity of the glue proteins was measured in the presence and absence of the chelator. The chelator eliminated the gel-stiffening effect of the proteins, suggesting that transition metals were necessary for the proteins to act on the gel. Thus, the glue contains transition metals and these metals play an essential role in glue function.

The role of metals in molluscan adhesive gels. Publishing Authors By Initials

SW Werneke,C Swann,LA Farquharson,KS Hamilton,AM Smith,

For similar inorganic chemicals: metals research abstracts see: inorganic chemicals: metals research

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The role of metals in molluscan adhesive gels. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: The Journal of experimental biology

VOLUME: 210

Page Numbers: 2137-45

Journal Abbreviation: J. Exp. Biol.

ISSN: 0022-0949

DAY: 3

MONTH: Jun

YEAR: 2007

The role of metals in molluscan adhesive gels. Information

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LANGUAGE: eng

NlmUniqueID: 243705

The role of metals in molluscan adhesive gels. Keywords Mesh Terms:

KEYWORDS: Metals

MESH TERMS: metabolism

Chemical & Substance for Abstract: The role of metals in molluscan adhesive gels. Information

Substance Name: Metals

Registry Number: 0

Grant and Affiliation Information for The role of metals in molluscan adhesive gels.

AFFILIATION: Department of Biology, Ithaca College, Ithaca, NY 14850, USA.

Country: England

AGENCY: United States NIBIB

GRANT: R15 EB006001-01

ACRONYM: EB

MEDLINETA: J Exp Biol

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