HLA system in solid organ transplantation part 15

histocompatibility testing

 

Expressed class I HLA molecules are composed of two different chains non-covalently bound. Their alpha chains (45 kDa), containing the peptide binding groove, is encoded by class I MHC genes, while their non covalently bound beta chain or beta2microglobulin (12kDa) is encoded on the chromosome 15. Beta2microglobulin binding is necessary for class 1 MHC molecules expression and for their proper folding for the right conformation of the peptide-binding groove. Their peptide binding groove is closed at the ends and accomodates short peptide ranging from 8-11 amino acids long. This groove has certain pockets that are the actual regions binding the anchor side chains of antigenic peptides. Specific pockets within the groove determine the sets of different peptides able to bind by class I MHC molecules. The stoichiometry necessary for proper signaling for CD8 T cell activation is one class I HLA molecule to one T cell receptor molecule.

Advertisements

About azaleaazelia

A nice person... :)
This entry was posted in Tak Berkategori. Bookmark the permalink.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s