BISC300 Lecture Notes - Lecture 1: Dna Replication, Mreb, Cell Wall
27 Nov 2016
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Document Summary
No genetic diversity in binary fission (how bacteria reproduce) Mutations occur and allow for evolution: mass expansion initiation of chromosome replication, cell length threshold, chromosome partition, septum formation, cytokinesis. Cytokinesis-septation: septation formation of cross walls between daughter cells, several steps. Constriction of cell and septum formation linkage of z ring to plasma membrane (cell wall) Z ring formation-role in septation: protein ftsz. Tubulin homologue, found in most bacteria and archaea. Polymerization forms z ring, filaments of meshwork. Binds to penicillin, which inhibits bacteria from growing/reproducing: mincde system in e coli. Limits the z ring to the center of the cell (i. e. midcell) Minc, mind, mine osciliate from one side of cell to other. Z ring consists and cell wall synthesis of septal wall. Cell wall growth and cell shape determination: vibrio (comma-shaped bacteria) Can only be in one location in the center. If it"s (cid:374)ot i(cid:374) the (cid:396)ight positio(cid:374), the (cid:272)ells (cid:271)e(cid:272)o(cid:373)e u(cid:374)e(cid:395)ual.
