Hello everyone!
I'm looking for bacterial strains with positive surface charge in neutral or close to neutral pH. According to the litterature, there are some bacteria that has a positive charge. But I can't seem to find any examples.
Does anyone know about this?
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Positive bacteria
Started by k_josefin, Jun 15 2011 09:46 PM
2 replies to this topic
#1
Posted 15 June 2011 - 09:46 PM
#2
Posted 25 June 2011 - 12:28 PM
Hello everyone!
I'm looking for bacterial strains with positive surface charge in neutral or close to neutral pH. According to the litterature, there are some bacteria that has a positive charge. But I can't seem to find any examples.
Does anyone know about this?
Think about using Staphylococcus aureus. One of the major lipids in staph is lysyl-phosphatidylglycerol. This polar lipid has a positively charged lysine attached. The membrane is subsequently positively charged in an attempt to repel cationic antiomicrobial peptides.
#3
Posted 25 June 2011 - 01:51 PM
Its a bit more complicated then Bluefunk said, but in essence, its ok.
In general: the charge is negative.. for gram - and gram +
This characteristic is used for example to concentrate toxic waste and more specific radioactive waste.
However, under certain circumstances, the charge can be altered by the bacterium in a response on the pH. Its a defence mechanism of the bacterium to survive.
I do not know if you had basic microbial physiology? Of not, try to look it up..
I also included a paper to start .. it gives you an example, Bluefunk allready mentioned S. A.
Its not so hard to find other examples if you search a bit.
In general: the charge is negative.. for gram - and gram +
This characteristic is used for example to concentrate toxic waste and more specific radioactive waste.
However, under certain circumstances, the charge can be altered by the bacterium in a response on the pH. Its a defence mechanism of the bacterium to survive.
I do not know if you had basic microbial physiology? Of not, try to look it up..
I also included a paper to start .. it gives you an example, Bluefunk allready mentioned S. A.
Its not so hard to find other examples if you search a bit.
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