6j12

Structural highlights

Disease

HEP2_HUMAN Defects in SERPIND1 are the cause of thrombophilia due to heparin cofactor 2 deficiency (THPH10) [MIM:612356. A hemostatic disorder characterized by a tendency to recurrent thrombosis.^{[1] [2] [3] [4]}

Function

HEP2_HUMAN Thrombin inhibitor activated by the glycosaminoglycans, heparin or dermatan sulfate. In the presence of the latter, HC-II becomes the predominant thrombin inhibitor in place of antithrombin III (AT-III). Also inhibits chymotrypsin, but in a glycosaminoglycan-independent manner.^[5] Peptides at the N-terminal of HC-II have chemotactic activity for both monocytes and neutrophils.^[6]

References

1. ↑ Blinder MA, Andersson TR, Abildgaard U, Tollefsen DM. Heparin cofactor IIOslo. Mutation of Arg-189 to His decreases the affinity for dermatan sulfate. J Biol Chem. 1989 Mar 25;264(9):5128-33. PMID:2647747
2. ↑ Cargill M, Altshuler D, Ireland J, Sklar P, Ardlie K, Patil N, Shaw N, Lane CR, Lim EP, Kalyanaraman N, Nemesh J, Ziaugra L, Friedland L, Rolfe A, Warrington J, Lipshutz R, Daley GQ, Lander ES. Characterization of single-nucleotide polymorphisms in coding regions of human genes. Nat Genet. 1999 Jul;22(3):231-8. PMID:10391209 doi:10.1038/10290
3. ↑ Kanagawa Y, Shigekiyo T, Aihara K, Akaike M, Azuma H, Matsumoto T. Molecular mechanism of type I congenital heparin cofactor (HC) II deficiency caused by a missense mutation at reactive P2 site: HC II Tokushima. Thromb Haemost. 2001 Jan;85(1):101-7. PMID:11204559
4. ↑ Corral J, Aznar J, Gonzalez-Conejero R, Villa P, Minano A, Vaya A, Carrell RW, Huntington JA, Vicente V. Homozygous deficiency of heparin cofactor II: relevance of P17 glutamate residue in serpins, relationship with conformational diseases, and role in thrombosis. Circulation. 2004 Sep 7;110(10):1303-7. Epub 2004 Aug 30. PMID:15337701 doi:10.1161/01.CIR.0000140763.51679.D9
5. ↑ Van Deerlin VM, Tollefsen DM. The N-terminal acidic domain of heparin cofactor II mediates the inhibition of alpha-thrombin in the presence of glycosaminoglycans. J Biol Chem. 1991 Oct 25;266(30):20223-31. PMID:1939083
6. ↑ Van Deerlin VM, Tollefsen DM. The N-terminal acidic domain of heparin cofactor II mediates the inhibition of alpha-thrombin in the presence of glycosaminoglycans. J Biol Chem. 1991 Oct 25;266(30):20223-31. PMID:1939083