1cfi: Difference between revisions
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<StructureSection load='1cfi' size='340' side='right' caption='[[1cfi]], [[NMR_Ensembles_of_Models | 17 NMR models]]' scene=''> | <StructureSection load='1cfi' size='340' side='right' caption='[[1cfi]], [[NMR_Ensembles_of_Models | 17 NMR models]]' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[1cfi]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/ | <table><tr><td colspan='2'>[[1cfi]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Human Human]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1CFI OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1CFI FirstGlance]. <br> | ||
</td></tr><tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=CGU:GAMMA-CARBOXY-GLUTAMIC+ACID'>CGU</scene></td></tr> | </td></tr><tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=CGU:GAMMA-CARBOXY-GLUTAMIC+ACID'>CGU</scene></td></tr> | ||
<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Coagulation_factor_IXa Coagulation factor IXa], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.4.21.22 3.4.21.22] </span></td></tr> | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Coagulation_factor_IXa Coagulation factor IXa], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.4.21.22 3.4.21.22] </span></td></tr> | ||
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1cfi FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1cfi OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1cfi RCSB], [http://www.ebi.ac.uk/pdbsum/1cfi PDBsum]</span></td></tr> | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1cfi FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1cfi OCA], [http://pdbe.org/1cfi PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1cfi RCSB], [http://www.ebi.ac.uk/pdbsum/1cfi PDBsum]</span></td></tr> | ||
</table> | </table> | ||
== Disease == | == Disease == | ||
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | ||
</div> | </div> | ||
<div class="pdbe-citations 1cfi" style="background-color:#fffaf0;"></div> | |||
==See Also== | ==See Also== | ||
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</StructureSection> | </StructureSection> | ||
[[Category: Coagulation factor IXa]] | [[Category: Coagulation factor IXa]] | ||
[[Category: | [[Category: Human]] | ||
[[Category: Baleja, J D]] | [[Category: Baleja, J D]] | ||
[[Category: Freedman, S J]] | [[Category: Freedman, S J]] |
Revision as of 10:32, 11 September 2015
NMR STRUCTURE OF CALCIUM ION-BOUND GAMMA-CARBOXY-GLUTAMIC ACID-RICH DOMAIN OF FACTOR IXNMR STRUCTURE OF CALCIUM ION-BOUND GAMMA-CARBOXY-GLUTAMIC ACID-RICH DOMAIN OF FACTOR IX
Structural highlights
Disease[FA9_HUMAN] Defects in F9 are the cause of recessive X-linked hemophilia B (HEMB) [MIM:306900]; also known as Christmas disease.[1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] [20] [21] [22] [23] [24] [25] [26] [27] [28] [29] [30] [31] [32] [33] [34] [35] [36] Note=Mutations in position 43 (Oxford-3, San Dimas) and 46 (Cambridge) prevents cleavage of the propeptide, mutation in position 93 (Alabama) probably fails to bind to cell membranes, mutation in position 191 (Chapel-Hill) or in position 226 (Nagoya OR Hilo) prevent cleavage of the activation peptide. Defects in F9 are the cause of thrombophilia due to factor IX defect (THPH8) [MIM:300807]. A hemostatic disorder characterized by a tendency to thrombosis.[37] Function[FA9_HUMAN] Factor IX is a vitamin K-dependent plasma protein that participates in the intrinsic pathway of blood coagulation by converting factor X to its active form in the presence of Ca(2+) ions, phospholipids, and factor VIIIa. Publication Abstract from PubMedWe have determined the Ca(II)-bound structure of factor IX, residues 1-47, by nuclear magnetic resonance (NMR) spectroscopy. The amino-terminal 47 residues include the gamma-carboxyglutamic acid-rich and aromatic amino acid stack domains, and this region is responsible for Ca(II)-dependent phospholipid binding in factor IX. Protons in the 1-47 amino acid sequence were assigned using standard two-dimensional homonuclear NMR experiments. A total of 851 distance restraints and 57 torsion angle restraints were used to generate 17 final structures by distance geometry and simulated annealing methods. The backbone RMSD to the geometric average is 0.6 +/- 0.1 A. The Ca(II)-bound structure is substantially more ordered with increased helical content compared to the apo-factor IX (1-47) structure. The global fold is similar to the crystal structure of the Ca(II)-bound Gla domain of prothrombin fragment I from residues 12 to 47 (RMSD approximately 1.3 A), but the backbone conformation differs in the first 11 residues, particularly between residues 3 and 6. The amino-terminal nine Gla residues are oriented to the interior of the protein and suggest an internal Ca(II) binding pocket. The carboxyl-terminal three Gla residues are exposed to solvent. The majority of hydrophobic residues are required to stabilize a globular core in the carboxyl-terminal three-quarters of the molecule. However, a hydrophobic surface patch in the amino-terminal region may represent a phospholipid binding site in factor IX. Structure of the calcium ion-bound gamma-carboxyglutamic acid-rich domain of factor IX.,Freedman SJ, Furie BC, Furie B, Baleja JD Biochemistry. 1995 Sep 26;34(38):12126-37. PMID:7547952[38] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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