magnetosomes

About microscopic forms of life, including Bacteria, Archea, protozoans, algae and fungi. Topics relating to viruses, viroids and prions also belong here.

Moderators: honeev, Leonid, amiradm, BioTeam

Post Reply
rabidrhymer
Garter
Garter
Posts: 2
Joined: Mon Oct 31, 2005 6:21 pm
Location: India

magnetosomes

Post by rabidrhymer » Wed Nov 02, 2005 7:39 am

we know that microbes having magnetosomes align themselves in the geomagnetic fields of th earth...so if i put an artificial magnet mear a colony of such microbes will they be attracted to the magnet like iron filings?...if not the why? :?:

User avatar
Mjhavok
Coral
Coral
Posts: 163
Joined: Thu Nov 25, 2004 6:54 pm

Post by Mjhavok » Thu Nov 24, 2005 12:18 pm

I actually have a to do a presentation on this 1 week today. They do align themselves to a magnetic field. Magenetosomes are lipid bound compounds of iron oxide Fe2O3 (magnetite).

ushishir
Garter
Garter
Posts: 15
Joined: Mon Aug 15, 2005 9:34 pm

Post by ushishir » Thu Nov 24, 2005 10:03 pm

I don't think bacteria will be pulled towards a magnet - there is not enough magentic material in them. But they will swim towards or away from a magnet making them quite easy to isolate.

There has been some interesting research recently published on magnetic bacteria:

"An acidic protein aligns magnetosomes along a filamentous structure in magnetotactic bacteria"
http://www.nature.com/nature/journal/va ... 04382.html

pdf: http://www.mpg.de/english/illustrations ... genPDF.pdf

Press release: http://www.mpg.de/english/illustrations ... 200511171/

interesting blog post: http://mcdougald.blogspot.com/2005/11/m ... teria.html

The 3D reconstructions of the inside of the bacteria are particularly amazing.

Post Reply

Who is online

Users browsing this forum: No registered users and 4 guests