ANSC 433 Lecture Notes - Lecture 5: Mimosine, Canavanine, Alpha And Beta Carbon
23 May 2018
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Proteins and Amino Acids – January 30, 2018
Slide 4
- Alpha AA = R on first carbon (on alpha carbon)
o Think of mostly cause they make proteins
- Beta AA = R on second carbon
- Gamma AA = R on third card
- Alpha carbon = carbon right next to COOH
- Over 700 different ones: change conformation (could be alpha, beta, gamma of the same AA)
o Example: -alanine, β-alaie = 2 AA’s ut oth are alaie
Slide 5
- Optical activity = shines the light a certain direction
- Mammals typically use L-AA to make proteins (which is why L or D type is important)
- Different species can use D-AA to different extents
o Can feed purified AA sources (made in a way that yield D or L conformation = why it is
important to know which one the animal uses/responds to)
Polling question
- How many different AA are incorporated in ribosomal protein synthesis? = 22
Slide 7
- Nonprotein AA are not building blocks but are still important for other bodily functions
- Ex: Taurine is essential for cats but also involved in vision and bile
- Ex: Canavanine and Mimosine are present in some forages that animals eat and can potentially
be toxic
Slide 9
- Pvt. Tim Hall = essential AA
o Phenylalanine
o Valine
o Threonine
o Tryptophan
o Isoleucine
o Methionine
o Histidine
o Arginine
o Lysine
o Leucine
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Document Summary
Proteins and amino acids january 30, 2018. Alpha aa = r on first carbon (on alpha carbon: think of mostly cause they make proteins. Beta aa = r on second carbon. Gamma aa = r on third card. Alpha carbon = carbon right next to cooh. Over 700 different ones: change conformation (could be alpha, beta, gamma of the same aa: example: -alanine, -ala(cid:374)i(cid:374)e = 2 aa"s (cid:271)ut (cid:271)oth are ala(cid:374)i(cid:374)e. Optical activity = shines the light a certain direction. Mammals typically use l-aa to make proteins (which is why l or d type is important) Different species can use d-aa to different extents: can feed purified aa sources (made in a way that yield d or l conformation = why it is important to know which one the animal uses/responds to) Nonprotein aa are not building blocks but are still important for other bodily functions. Ex: taurine is essential for cats but also involved in vision and bile.
