Open main menu
Home
Random
Recent changes
Special pages
Community portal
Preferences
About Wikipedia
Disclaimers
Incubator escapee wiki
Search
User menu
Talk
Dark mode
Contributions
Create account
Log in
Editing
Capsid
(section)
Warning:
You are not logged in. Your IP address will be publicly visible if you make any edits. If you
log in
or
create an account
, your edits will be attributed to your username, along with other benefits.
Anti-spam check. Do
not
fill this in!
===Prolate=== [[Image:PhageExterior.svg|thumb|left|The prolate structure of a typical head on a [[bacteriophage]]]] An elongated icosahedron is a common shape for the heads of bacteriophages. Such a structure is composed of a cylinder with a cap at either end. The cylinder is composed of 10 elongated triangular faces. The Q number (or T<sub>mid</sub>), which can be any positive integer,<ref>{{cite journal | vauthors = Luque A, Reguera D | title = The structure of elongated viral capsids | journal = Biophysical Journal | volume = 98 | issue = 12 | pages = 2993β3003 | date = June 2010 | pmid = 20550912 | pmc = 2884239 | doi = 10.1016/j.bpj.2010.02.051 | bibcode = 2010BpJ....98.2993L }}</ref> specifies the number of triangles, composed of asymmetric subunits, that make up the 10 triangles of the cylinder. The caps are classified by the T (or T<sub>end</sub>) number.<ref>{{cite book | vauthors = Casjens S |title=Desk Encyclopedia of General Virology|publisher=Academic Press |location=Boston |year=2009 |pages=167β174 |isbn=978-0-12-375146-1}}</ref>{{clear}} The bacterium ''E. coli'' is the host for [[Escherichia virus T4|bacteriophage T4]] that has a prolate head structure. The bacteriophage encoded gp31 protein appears to be functionally homologous to ''E. coli'' chaperone protein GroES and able to substitute for it in the assembly of bacteriophage T4 virions during infection.<ref name = Marusich1998>Marusich EI, Kurochkina LP, Mesyanzhinov VV. Chaperones in bacteriophage T4 assembly. Biochemistry (Mosc). 1998;63(4):399-406</ref> Like GroES, gp31 forms a stable complex with [[GroEL]] [[chaperone (protein)|chaperonin]] that is absolutely necessary for the folding and assembly ''in vivo'' of the bacteriophage T4 major capsid protein gp23.<ref name = Marusich1998/>
Edit summary
(Briefly describe your changes)
By publishing changes, you agree to the
Terms of Use
, and you irrevocably agree to release your contribution under the
CC BY-SA 4.0 License
and the
GFDL
. You agree that a hyperlink or URL is sufficient attribution under the Creative Commons license.
Cancel
Editing help
(opens in new window)