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VEK-30 protein domain
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VEK-30 protein domain : ウィキペディア英語版
VEK-30 protein domain

In molecular biology, the protein domain VEK-30, is a 30-amino acid long, internal peptide present within bacterial organisms that acts as an epitope or antigenic determinant. It increases the pathogenicity of the cell. More specifically, it is found in streptococcal M-like plasminogen (Pg)-binding protein (PAM) from Gram-positive group-A streptococci (GAS). VEK-30 represents an epitope within PAM that shows high affinity for the lysine binding site (LBS) of the kringle-2 (K2) domain of human (h)Pg.
==Plasminogen==
Plasminogen (Pg) is an important mediator of angiostatin production in the fibrinolytic pathway. Plasminogen is made up of five subunit kringle molecules (Pg-K1 to Pg-K5), of which the first three make the protein angiostatin. VEK-30 is a protein domain of the group A streptococcal protein PAM. It binds to Pg-K2 domain of angiostatin and activates the molecule to mediate its anti-angiogenic effects. VEK-30 binds to angiostatin via a C-terminal lysine with argininyl and glutamyl side chain residues known as a 'through space isostere'.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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