BIOL240 Lecture Notes - Lecture 10: Methylotroph, Protein Structure, Archaea
15 Mar 2019
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Document Summary
Fluid membranes are not viable at high temps. That"s why you want saturated mem. at high temps. A cell membrane constructed from isoprene units unique to archaea. Need a high temp but also need water but water boils and evaporates so a place of high pressure like sea floor so water doesn"t boil. Specific aa in chain help make more salt bridges to stabilize protein structure. Combination of h- bonding and also electrostatic interactions of side chains: more arginine/tyrosine aa good for salt bridges. They need to be in the hot vents because normal conditions for us to them are extreme so they die at lower temperature or become dormant: euryarchaeota halophiles (salt lovers). Of >1. 5m: evaporating ponds are places where we make salt. Live in high salt environments (dead sea and great salt lake) grows. They are red pigmented giving the area a red color. Risk for halobacterium is hypertonic conditions which could take all their water.
