Navigation Links
Bare bones of crystal growth: Biomolecules enhance metal contents in calcite
Date:10/31/2008

Blacksburg, Va. From shells to bones, the skeletons of organisms contain small amounts of impurity elements such as magnesium. Because the levels of these elements provide important clues to past environments, a considerable effort has focused on understanding how to relate impurity contents to the ancient environments in which an organism lived.

In the October 31 issue of Science magazine, Allison Stephenson, a Ph.D. candidate in geoscience, and Patricia Dove, professor of geoscience in the College of Science at Virginia Tech, and colleagues* report that a hydrophilic peptide, similar in character to those found in calcifying organisms, significantly enhances the magnesium (Mg)-content of calcite.

"We knew from another study in our group (Elhadj et al., 2006, PNAS) that the chemistry of simple peptides as well as proteins could be tuned to control crystal growth rate and change crystal morphology," said Dove. "From that understanding, we realized that the water-structuring abilities of certain biomolecules could also influence the amount of impurities that can go into minerals."

"All organisms use proteins to grow minerals into complex shapes with remarkable functions," said lead author Stephenson. "But this finding is especially meaningful for geologists because Mg-content in carbonates is used as a 'paleo thermometer'. That is, we know that Mg content increases with temperature, but now we see that certain biomolecules could also affect those 'signatures'. The findings raise questions about the interplay of different factors on metal-contents in biominerals."

The findings also offer new insights for materials synthesis because a high degree of control on impurities is often necessary to give specific properties such as strength or electrical conductivity. By using biomolecules, it may be possible to tune impurities to desired levels, Dove said.

"Also, this basic research suggests new ways of looking at biochemical origins of pathological skeletal mineralization, and whether local biochemistry could influence the uptake of toxic metals into human skeletons," Stephenson said.


'/>"/>

Contact: Susan Trulove
STrulove@vt.edu
540-231-5646
Virginia Tech
Source:Eurekalert

Related biology news :

1. Why binge drinking is bad for your bones
2. IOF calls on European citizens to stand tall and speak out for their bones
3. Excavated Jericho bones may help Israeli-Palestinian-German team combat tuberculosis
4. Where and why humans made skates out of animal bones
5. Ancient fish bones reveal impacts of global warming beneath the sea
6. New research on structure of bones raises questions for treatment of osteoporosis
7. Photonic crystal biosensors detect protein-DNA interactions
8. Scientists demonstrate the sharpest measurement of ice crystals in clouds
9. Crystal (eye) ball: Study says visual system equipped with future seeing powers
10. New clues to how proteins dissolve and crystallize
11. Scientists find missing evolutionary link using tiny fungus crystal
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/24/2016)... Ampronix facilitates superior patient care by providing unparalleled technology to leaders of ... the latest premium product recently added to the range of products distributed by Ampronix. ... ... ... Medical Display- Ampronix News ...
(Date:5/3/2016)... , May 3, 2016  Neurotechnology, a ... the MegaMatcher Automated Biometric Identification System (ABIS) ... large-scale multi-biometric projects. MegaMatcher ABIS can process multiple ... using any combination of fingerprint, face or iris ... MegaMatcher SDK and MegaMatcher Accelerator , ...
(Date:4/19/2016)... The new GEZE SecuLogic access ... "all-in-one" system solution for all door components. It can ... door interface with integration authorization management system, and thus ... minimal dimensions of the access control and the optimum ... offer considerable freedom of design with regard to the ...
Breaking Biology News(10 mins):
(Date:6/23/2016)... ... June 23, 2016 , ... Charm Sciences, Inc. ... test has received AOAC Research Institute approval 061601. , “This is another AOAC-RI ... stated Bob Salter, Vice President of Regulatory and Industrial Affairs. “The Peel Plate ...
(Date:6/23/2016)... ON (PRWEB) , ... June 23, 2016 , ... STACS ... DNA Technical Leader at the Arkansas State Crime Laboratory, has joined STACS DNA as ... the STACS DNA team,” said Jocelyn Tremblay, President and COO of STACS DNA. “In ...
(Date:6/23/2016)... On Wednesday, June 22, 2016, the NASDAQ Composite ... Jones Industrial Average edged 0.27% lower to finish at 17,780.83; ... has initiated coverage on the following equities: Infinity Pharmaceuticals Inc. ... NKTR ), Aralez Pharmaceuticals Inc. (NASDAQ: ARLZ ), ... more about these stocks by accessing their free trade alerts ...
(Date:6/23/2016)... 23, 2016 ReportsnReports.com adds ... to its pharmaceuticals section with historic and forecast ... much more. Complete report on the ... profiling 15 companies and supported with 261 tables ... . The Global Cell Culture ...
Breaking Biology Technology: