thumbnail

Extracellular proteins limit the dispersal of biogenic nanoparticles

Science

By:
, , , , ,
DOI: 10.1126/science.1141064

Links

Abstract

High-spatial-resolution secondary ion microprobe spectrometry, synchrotron radiation-based Fourier-transform infrared spectroscopy, and polyacrylamide gel analysis demonstrated the intimate association of proteins with spheroidal aggregates of biogenic zinc sulfide nanocrystals, an example of extracellular biomineralization. Experiments involving synthetic zinc sulfide nanoparticles and representative amino acids indicated a driving role for cysteine in rapid nanoparticle aggregation. These findings suggest that microbially derived extracellular proteins can limit the dispersal of nanoparticulate metal-bearing phases, such as the mineral products of bioremediation, that may otherwise be transported away from their source by subsurface fluid flow.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Extracellular proteins limit the dispersal of biogenic nanoparticles
Series title:
Science
DOI:
10.1126/science.1141064
Volume
316
Issue:
5831
Year Published:
2007
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Science
First page:
1600
Last page:
1603
Number of Pages:
4