1lqd is a 2 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
[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.
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
A series of 138 nonchiral 3-amidinobenzyl-1H-indole-2-carboxamides and analogues as inhibitors of the blood coagulation enzyme factor Xa (fXa) were designed, synthesized, and investigated by X-ray structure analysis and 3D quantitative structure-activity relationship (QSAR) studies (CoMFA, CoMSIA) in order to identify important protein-ligand interactions responsible for biological affinity and selectivity. Several compounds from this series are highly potent and selective inhibitors of this important enzyme linking extrinsic and intrinsic coagulation pathways. To rationalize biological affinity and to provide guidelines for further design, all compounds were docked into the factor Xa binding site. Those docking studies were based on X-ray structures of factor Xa in complex with literature-known inhibitors. It was possible to validate those binding modes by four X-ray crystal structures of representative ligands in factor Xa, while one ligand was additionally crystallized in trypsin to rationalize requirements for selective factor Xa inhibition. The 3D-QSAR models based on a superposition rule derived from these docking studies were validated using conventional and cross-validated r(2) values using the leave-one-out method and repeated analyses using two randomly chosen cross-validation groups plus randomization of biological activities. This led to consistent and highly predictive 3D-QSAR models with good correlation coefficients for both CoMFA and CoMSIA, which were found to correspond to experimentally determined factor Xa binding site topology in terms of steric, electrostatic, and hydrophobic complementarity. Subsets selected as smaller training sets using 2D fingerprints and maximum dissimilarity methods resulted in 3D-QSAR models with remarkable correlation coefficients and a high predictive power. The final quantitative SAR information agrees with all experimental data for the binding topology and thus provides reasonable activity predictions for novel factor Xa inhibitors.
Design and quantitative structure-activity relationship of 3-amidinobenzyl-1H-indole-2-carboxamides as potent, nonchiral, and selective inhibitors of blood coagulation factor Xa.,Matter H, Defossa E, Heinelt U, Blohm PM, Schneider D, Muller A, Herok S, Schreuder H, Liesum A, Brachvogel V, Lonze P, Walser A, Al-Obeidi F, Wildgoose P J Med Chem. 2002 Jun 20;45(13):2749-69. PMID:12061878[18]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
↑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
↑Matter H, Defossa E, Heinelt U, Blohm PM, Schneider D, Muller A, Herok S, Schreuder H, Liesum A, Brachvogel V, Lonze P, Walser A, Al-Obeidi F, Wildgoose P. Design and quantitative structure-activity relationship of 3-amidinobenzyl-1H-indole-2-carboxamides as potent, nonchiral, and selective inhibitors of blood coagulation factor Xa. J Med Chem. 2002 Jun 20;45(13):2749-69. PMID:12061878
