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Essay: Origin of the chloroplast division mechanism

Verhoek, I.C. (2016) Essay: Origin of the chloroplast division mechanism. Bachelor's Thesis, Biology.

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The chloroplast division mechanism is similar to bacterial division. Considering chloroplasts are from bacterial origin, engulfed bacteria evolved and adapted to the eukaryotic host-cell. Parts of the bacterial division components were retained and parts of the eukaryotic host-cell were integrated. The chloroplast division complex consists of four contractile rings, while the bacterial division is only comprised of one contractile ring. The first contractile ring to assemble is of bacterial origin; the FtsZ ring. Then the inner PD ring, outer PD ring and ARC5/DRP5B ring follow. The contractile rings need to be tethered to the membranes and are regulated by other proteins. The contractile rings on the inner envelope membrane are regulated by the proteins ARC6 and PARC6 and the outer envelope membrane is managed by the proteins PDV1 and PDV2. It is also very important that the contractile rings are placed on the correct division site of the chloroplast. This is directed by the proteins ARC3, minD, minE and MCD1. The membranes need to be separated for the final segregation. Proteins that are thought to be involved in this process are CLMP1 and CRL. Certain factors of the division mechanism are still not fully understood and need to be investigated.

Item Type: Thesis (Bachelor's Thesis)
Degree programme: Biology
Thesis type: Bachelor's Thesis
Language: English
Date Deposited: 15 Feb 2018 08:11
Last Modified: 15 Feb 2018 08:11

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