BIOL 1090 Lecture Notes - Lecture 28: Chloroplast Membrane, Plastid, Light-Independent Reactions
18 Jan 2017
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Document Summary
In order to replicate itself it must ensure its survival: to harvest energy, to ensure all products are utilized efficiently. 6co2 + 12h2o c6h12o6 + 6h2o + 6o2. Space inside thylakoid is called the lumen. Outside but inside of envelope is called stroma. Stroma contains proteins used for carbohydrate synthesis. Takes several hundred chloroplast molecules to make a photosynthetic unit. Antenna system harvest the light and transfer energy to reaction center. Both light dependent: solar energy absorbed and stored in atp and. And dark reactions: carbs synthesized form co2 using atp/nadph. Chlorophyll-a is most efficient in promoting photosynthesis. Proteins and lipids are exchanged between plastids and er. Have their own dna and ribosomes but are controlled by nuclear encoded proteins. Proteins targeted to chloroplasts have n-terminal transit peptide: stroma targeting domain (std, thylakoid targeting domain (ttd) Std-containing proteins remain in stroma after removal of std. Ttd move into thylakoid membrane or lumen.
