User:Scmohr/Antibiotic-res cat page

< User:Scmohr
Revision as of 17:54, 30 July 2008 by Scmohr (Talk | contribs) (→‎3. Membrane-embedded Efflux Pumps)

Introduction to Antibiotic Resistance

The established mechanisms of antibiotic resistance include the following:

  1. Enzymes that inactivate the antibiotic [famously (a). beta-lactamases that destroy penicillins and related compounds and (b) enzymes that acetylate chloramphenicol].
  2. Proteins that keep antibiotics out of the cell (by blocking the outer-membrane pores).
  3. Membrane-embedded channel proteins that actively pump antibiotics out of the cell.
  4. Proteins (and RNAs) with altered drug binding sites. (Vancomycin resistance comes from a switch in the chemistry of the cell-wall cross-linking peptide). This category also includes mutations in ribosomal RNA -- ribosomes are one of the main targets of both prokaryote- and eukaryote-directed antibiotics.
  5. Proteins that enable substitution of an alternative metabolic pathway (as in the case of sulfonamide resistance).

More details about antibiotic resistance can be found at __________________.

Antibiotic-Resistance Basic Parts by Category

NB Parts listed in boldface are "good" parts ["Available" and (in most cases) "Work"]. Parts in plain type are poorly characterized.

1. Antibiotic-inactivating Enzymes

BBa_J23012
BBa_J31002
BBa_J31003
BBa_J31004
BBa_J31005
BBa_J42020
BBa_J42021

2. Membrane-blocking Proteins

3. Membrane-embedded Efflux Pumps

BBa_J31006
BBa_J31007
BBa_R0040

4. Altered Target Molecules

BBa_J42010

5. Components of Alternative Metabolic Pathways

Antibiotic-Resistance Devices by Category

These are BioBrick composite parts that contain (one or more?) antibiotic resistance components.

1. With Antibiotic-inactivating Enzymes

2. With Membrane-blocking Proteins

3. With Membrane-embedded Efflux Pumps

4. With Altered Target Molecules

5. Containing Components of Alternative Metabolic Pathways

Note: Antibiotic resistance genes are present in most of the plasmids supplied by the Registry (see Plasmid).

WHAT ABOUT THE VARIOUS CELL LINES OFFERED AS CHASSIS?

Useful Information about Antibiotic Resistance

Links

Aminoglycoside Resistance

This category includes kanamycin, streptomycin, gentamycin, neomycin, tobramycin, amikacin...

http://www.antibioresistance.be/aminoglycosides.html

http://openwetware.org/wiki/Kanamycin

Tetracycline Resistance

This category includes three different resistance mechanisms. Related antibiotics are tetracycline, chlortetracycline, doxycycline, minocycline, oxytetracycline, spectinomycin. Note that the TetR gene encodes a very popular repressor that is frequently used in synthetic biology simply as a single control element in cells that do not express tetracycline resistance. [Check this.]

http://www.antibioresistance.be/Tetracycline/Menu_Tet.html

http://openwetware.org/wiki/Tetracycline

http://cmr.asm.org/cgi/content/abstract/5/4/387


Miscellaneous Information about Antibiotic Resistance in the Registry

1. Items with Antibiotic-inactivating Enzymes

Plasmids
BBa_K125000
Cells
BBa_V1016
BBa_V1019