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Bio 3400 - Lecture 2 PII
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Simple transporter structure
12 transmembrane domains
Peptidoglycan
Rigid layer providing strength to cell wall
Composition of peptidoglycan
Polysaccharide
N
-acetylglucosamine or
N-
acetylmuramic acid
Amino acids
Lysine or diaminopimelic acid (DAP)
Different crosslinking in gram +,-
Peptidoglycan linkage
beta(1-4), Lysozyme sensitive
Variations in peptidoglycan structure
Gram +
: Peptide bridge
Gram +
: Lysine
Gram -
: DAP
Peptidoglycan synthesis
50nm wide cables
Crosslinking
Gram + has multiple layers
Gram - (peptidoglycan)
10% Peptidoglycan (cell wall)
Lipopolysaccharide replaces outer membrane phospholipids (toxic to animals)
Aracheal peptidoglycan
No peptidoglycan - Pseudomerin instead (in some)
No outer membrane
Pseudomurein
N-
acetylglucosamine and
N-
acetylsaminuronic acid
Author
Ant
ID
315266
Card Set
Bio 3400 - Lecture 2 PII
Description
Bio 3400
Updated
2016-02-03T22:37:34Z
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