JOURNAL ARTICLE

Silica pattern formation in diatoms: species-specific polyamine biosynthesis

Manfred Sumper, Gerhard Lehmann
Chembiochem: a European Journal of Chemical Biology 2006, 7 (9): 1419-27
16888733
Diatoms are eukaryotic, unicellular algae that are well known for the intricate architecture of their silica-based cell walls. Species identification is mainly based on variations of their hierarchically organized silica structures. Particularly striking silica frameworks are found among diatoms that belong to the genus Coscinodiscus. Recent work indicates an important role for long-chain polyamines in guiding silica precipitation as well as in silica-pattern formation. Here we demonstrate that polyamines, even if isolated from closely related diatom species, exhibit substantial structural differences. Structural variations include the overall chain length, the degree of methylation, positions of secondary amino functionalities, and, unexpectedly, site-specific incorporation of a quaternary ammonium functionality. These findings support a specific role for polyamines in creating silica nanostructures.

Full Text Links

Find Full Text Links for this Article

Discussion

You are not logged in. Sign Up or Log In to join the discussion.

Related Papers

Remove bar
Read by QxMD icon Read
16888733
×

Save your favorite articles in one place with a free QxMD account.

×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"