| Structural highlights
Disease
[FA10_HUMAN] Defects in F10 are the cause of factor X deficiency (FA10D) [MIM:227600]. A hemorrhagic disease with variable presentation. Affected individuals can manifest prolonged nasal and mucosal hemorrhage, menorrhagia, hematuria, and occasionally hemarthrosis. Some patients do not have clinical bleeding diathesis.[1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17]
Function
[FA10_HUMAN] Factor Xa is a vitamin K-dependent glycoprotein that converts prothrombin to thrombin in the presence of factor Va, calcium and phospholipid during blood clotting. [ECOT_ECOLI] General inhibitor of pancreatic serine proteases: inhibits chymotrypsin, trypsin, elastases, factor X, kallikrein as well as a variety of other proteases. The strength of inhibition does not appear to be correlated with a particular protease specificity.[HAMAP-Rule:MF_00706]
Evolutionary Conservation
Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.
Publication Abstract from PubMed
The serine protease factor Xa (FXa) is inhibited by ecotin with picomolar affinity. The structure of the tetrameric complex of ecotin variant M84R (M84R) with FXa has been determined to 2.8 A. Substrate directed induced fit of the binding interactions at the S2 and S4 pockets modulates the discrimination of the protease. Specifically, the Tyr at position 99 of FXa changes its conformation with respect to incoming ligand, changing the size of the S2 and S4 pockets. The role of residue 192 in substrate and inhibitor recognition is also examined. Gln 192 from FXa forms a hydrogen bond with the P2 carbonyl group of ecotin. This confirms previous biochemical and structural analyses on thrombin and activated protein C, which suggested that residue 192 may play a more general role in mediating the interactions between coagulation proteases and their inhibitors. The structure of ecotin M84R-FXa (M84R-FXa) also reveals the structure of the Gla domain in the presence of Mg(2+). The first 11 residues of the domain assume a novel conformation and likely represent an intermediate folding state of the domain.
The extended interactions and Gla domain of blood coagulation factor Xa.,Wang SX, Hur E, Sousa CA, Brinen L, Slivka EJ, Fletterick RJ Biochemistry. 2003 Jul 8;42(26):7959-66. PMID:12834348[18]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Reddy SV, Zhou ZQ, Rao KJ, Scott JP, Watzke H, High KA, Jagadeeswaran P. Molecular characterization of human factor XSan Antonio. Blood. 1989 Oct;74(5):1486-90. PMID:2790181
- ↑ Watzke HH, Lechner K, Roberts HR, Reddy SV, Welsch DJ, Friedman P, Mahr G, Jagadeeswaran P, Monroe DM, High KA. Molecular defect (Gla+14----Lys) and its functional consequences in a hereditary factor X deficiency (factor X "Vorarlberg"). J Biol Chem. 1990 Jul 15;265(20):11982-9. PMID:1973167
- ↑ James HL, Girolami A, Fair DS. Molecular defect in coagulation factor XFriuli results from a substitution of serine for proline at position 343. Blood. 1991 Jan 15;77(2):317-23. PMID:1985698
- ↑ Marchetti G, Castaman G, Pinotti M, Lunghi B, Di Iasio MG, Ruggieri M, Rodeghiero F, Bernardi F. Molecular bases of CRM+ factor X deficiency: a frequent mutation (Ser334Pro) in the catalytic domain and a substitution (Glu102Lys) in the second EGF-like domain. Br J Haematol. 1995 Aug;90(4):910-5. PMID:7669671
- ↑ Bezeaud A, Miyata T, Helley D, Zeng YZ, Kato H, Aillaud MF, Juhan-Vague I, Guillin MC. Functional consequences of the Ser334-->Pro mutation in a human factor X variant (factor XMarseille). Eur J Biochem. 1995 Nov 15;234(1):140-7. PMID:8529633
- ↑ Kim DJ, Thompson AR, James HL. Factor XKetchikan: a variant molecule in which Gly replaces a Gla residue at position 14 in the light chain. Hum Genet. 1995 Feb;95(2):212-4. PMID:7860069
- ↑ Messier TL, Wong CY, Bovill EG, Long GL, Church WR. Factor X Stockton: a mild bleeding diathesis associated with an active site mutation in factor X. Blood Coagul Fibrinolysis. 1996 Jan;7(1):5-14. PMID:8845463
- ↑ Rudolph AE, Mullane MP, Porche-Sorbet R, Tsuda S, Miletich JP. Factor XSt. Louis II. Identification of a glycine substitution at residue 7 and characterization of the recombinant protein. J Biol Chem. 1996 Nov 8;271(45):28601-6. PMID:8910490
- ↑ Zama T, Murata M, Watanabe R, Yokoyama K, Moriki T, Ambo H, Murakami H, Kikuchi M, Ikeda Y. A family with hereditary factor X deficiency with a point mutation Gla32 to Gln in the Gla domain (factor X Tokyo). Br J Haematol. 1999 Sep;106(3):809-11. PMID:10468877
- ↑ Millar DS, Elliston L, Deex P, Krawczak M, Wacey AI, Reynaud J, Nieuwenhuis HK, Bolton-Maggs P, Mannucci PM, Reverter JC, Cachia P, Pasi KJ, Layton DM, Cooper DN. Molecular analysis of the genotype-phenotype relationship in factor X deficiency. Hum Genet. 2000 Feb;106(2):249-57. PMID:10746568
- ↑ Forberg E, Huhmann I, Jimenez-Boj E, Watzke HH. The impact of Glu102Lys on the factor X function in a patient with a doubly homozygous factor X deficiency (Gla14Lys and Glu102Lys). Thromb Haemost. 2000 Feb;83(2):234-8. PMID:10739379
- ↑ Simioni P, Vianello F, Kalafatis M, Barzon L, Ladogana S, Paolucci P, Carotenuto M, Dal Bello F, Palu G, Girolami A. A dysfunctional factor X (factor X San Giovanni Rotondo) present at homozygous and double heterozygous level: identification of a novel microdeletion (delC556) and missense mutation (Lys(408)-->Asn) in the factor X gene. A study of an Italian family. Thromb Res. 2001 Feb 15;101(4):219-30. PMID:11248282
- ↑ Vianello F, Lombardi AM, Boldrin C, Luni S, Girolami A. A new factor X defect (factor X Padua 3): a compound heterozygous between true deficiency (Gly(380)-->Arg) and an abnormality (Ser(334)-->Pro). Thromb Res. 2001 Nov 15;104(4):257-64. PMID:11728527
- ↑ Vianello F, Lombardi AM, Bello FD, Palu G, Zanon E, Girolami A. A novel type I factor X variant (factor X Cys350Phe) due to loss of a disulfide bond in the catalytic domain. Blood Coagul Fibrinolysis. 2003 Jun;14(4):401-5. PMID:12945883
- ↑ Isshiki I, Favier R, Moriki T, Uchida T, Ishihara H, Van Dreden P, Murata M, Ikeda Y. Genetic analysis of hereditary factor X deficiency in a French patient of Sri Lankan ancestry: in vitro expression study identified Gly366Ser substitution as the molecular basis of the dysfunctional factor X. Blood Coagul Fibrinolysis. 2005 Jan;16(1):9-16. PMID:15650540
- ↑ Al-Hilali A, Wulff K, Abdel-Razeq H, Saud KA, Al-Gaili F, Herrmann FH. Analysis of the novel factor X gene mutation Glu51Lys in two families with factor X-Riyadh anomaly. Thromb Haemost. 2007 Apr;97(4):542-5. PMID:17393015
- ↑ Chafa O, Tagzirt M, Tapon-Bretaudiere J, Reghis A, Fischer AM, LeBonniec BF. Characterization of a homozygous Gly11Val mutation in the Gla domain of coagulation factor X. Thromb Res. 2009 May;124(1):144-8. doi: 10.1016/j.thromres.2008.11.018. Epub 2009, Jan 10. PMID:19135706 doi:10.1016/j.thromres.2008.11.018
- ↑ Wang SX, Hur E, Sousa CA, Brinen L, Slivka EJ, Fletterick RJ. The extended interactions and Gla domain of blood coagulation factor Xa. Biochemistry. 2003 Jul 8;42(26):7959-66. PMID:12834348 doi:10.1021/bi027320a
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