BIOL2142 Lecture Notes - Lecture 4: Cytokinesis, Archaea, Tubulin
Document Summary
Microbiologists study population growth rather than growth of individual cells. Cell cycle is sequence of events from formation of new cell thorough the next cell division. Cytokinesis - formation of the septum and progeny cells: coli cell cycle. Replisomes pushes, or leads to condensation of, daughter chromosomes to opposite ends. Parb binds dna at pars site near origin of replication parb binds 2 copies of pars site since dna has been replicated. Para interaction with 1 of the 2 parb/pars complexes causes it to depolymerise, pulling none copy of the dna away pars site found in almost 70% of 400 sequenced genomes. Separation - formation of cross walls between daughter cells. Assembly of the z ring - composed of protein ftsz. Constriction of th4 z ring, invagination of the plasma membrane, and synthesis of septal wall completely division. Tubulin homolouge, found in most bacteia and archaea. Mincde system in e. coli limits z ring to cell centre.
