Cross Strand Exchange During Recombination
This is very beutiful video clearfying the complex mechanism of cross strand exchange. If you find and add more information as comment, i cand add it description part.
Tags //
Cross Strand Exchange
Added: March 25, 2007, 2:08 pm
Runtime: 65.00 | Views: 7887 |
Comments:0
Not yet rated
Public Videos
Videos 1-5 of 380
DNA Helicase structure and function
Helicases are a class of enzymes vital to all living organisms. They are motor proteins that move directionally along a nucleic acid phosphodiester backbone, separating two annealed nucleic acid strands (i.e. DNA, RNA, or RNA-DNA hybrid) using energy derived from nucleotide hydrolysis.
Many cellular processes (DNA replication, RNA transcription, DNA recombination, DNA repair, Ribosome biogenesis) involve the separation of nucleic acid strands. Helicases are often utilized to separate strands of a DNA double helix or a self-annealed RNA molecule using the energy from ATP or GTP hydrolysis. They move incrementally along one nucleic acid strand of the duplex with a directionality specific to each particular enzyme. There are many helicases (14 confirmed in E. coli, 24 in human cells) resulting from the great variety of processes in which strand separation must be catalyzed.[citation needed]
Helicases adopt different structures and oligomerization states. Whereas DnaB-like helicases unwind DNA as donut shaped hexamers, other enzymes have been shown to be active as monomers or dimers. Their precise mechanisms of action remain unclear.
Text Reff: http://en.wikipedia.org/wiki/Helicase
Tags //
06.2-DNA_helicase
Added: March 25, 2007, 2:02 pm
Runtime: 103.10 | Views: 55572 |
Comments:1
Usage of PDB file in analysing 3D structure of proteins
About PDB file: This is a short guide to the manipulation of the files of the Protein Data Bank (PDB) [1]. There are several issues which are related to the format of these files and to the data they contain which are not always easy to understand without some experience. The idea here is to give some hints and guidelines on what to expect from these files whether they come from the PDB or were generated by a program, and how to write software which manipulates these data.
Tags //
PDB file 3D structure
Added: March 25, 2007, 1:45 pm
Runtime: 169.90 | Views: 9027 |
Comments:0
Elangation factor EF-Tu
Structure of Elongation factor TU. Elongation factors are a set of proteins that facilitate the events of translational elongation, the steps in protein synthesis from the formation of the first peptide bond to the formation of the last one.
Tags //
04.10-EF-Tu
Added: March 25, 2007, 1:53 pm
Runtime: 116.90 | Views: 5917 |
Comments:0