1ycp

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(Difference between revisions)

Revision as of 10:27, 8 January 2015

THE CRYSTAL STRUCTURE OF FIBRINOGEN-AA PEPTIDE 1-23 (F8Y) BOUND TO BOVINE THROMBIN EXPLAINS WHY THE MUTATION OF PHE-8 TO TYROSINE STRONGLY INHIBITS NORMAL CLEAVAGE AT ARGININE-16

Structural highlights

1ycp is a 7 chain structure with sequence from Bos taurus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Activity:	Thrombin, with EC number 3.4.21.5
Resources:	FirstGlance, OCA, RCSB, PDBsum

Disease

[FIBA_HUMAN] Defects in FGA are a cause of congenital afibrinogenemia (CAFBN) [MIM:202400]. This is a rare autosomal recessive disorder characterized by bleeding that varies from mild to severe and by complete absence or extremely low levels of plasma and platelet fibrinogen. Note=The majority of cases of afibrinogenemia are due to truncating mutations. Variations in position Arg-35 (the site of cleavage of fibrinopeptide a by thrombin) leads to alpha-dysfibrinogenemias. Defects in FGA are a cause of amyloidosis type 8 (AMYL8) [MIM:105200]; also known as systemic non-neuropathic amyloidosis or Ostertag-type amyloidosis. AMYL8 is a hereditary generalized amyloidosis due to deposition of apolipoprotein A1, fibrinogen and lysozyme amyloids. Viscera are particularly affected. There is no involvement of the nervous system. Clinical features include renal amyloidosis resulting in nephrotic syndrome, arterial hypertension, hepatosplenomegaly, cholestasis, petechial skin rash.^[1]

Function

[THRB_BOVIN] Thrombin, which cleaves bonds after Arg and Lys, converts fibrinogen to fibrin and activates factors V, VII, VIII, XIII, and, in complex with thrombomodulin, protein C. Functions in blood homeostasis, inflammation and wound healing (By similarity). [FIBA_HUMAN] Fibrinogen has a double function: yielding monomers that polymerize into fibrin and acting as a cofactor in platelet aggregation.

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 peptide containing residues 1-50 of the Aalpha-chain of fibrinogen, expressed as a fusion peptide with beta-galactosidase, is rapidly cleaved by thrombin at Arg-16, similarly to whole fibrinogen. When Phe-8, which is highly conserved, is replaced with tyrosine (F8Y), the cleavage is slowed drastically [Lord, Byrd, Hede, Wei and Colby (1990) J. Biol. Chem. 265, 838-843]. To examine the structural basis for this result, we have determined the crystal structure of bovine thrombin complexed with a synthetic peptide containing residues 1-23 of fibrinogen Aalpha and the F8Y mutation. The crystals are in space group P43212, with unit-cell dimensions of a = 88.3 A (1 A = 0.1 nm), c = 195.5 A and two complexes in the asymmetric unit. The final R factor is 0.183 for 2sigma data from 7.0 to 2.5 A resolution.There is continuous density for the five residues in the P3, P2, P1, P1' and P2' positions of the peptide (Gly-14f to Pro-18f) at the active site of thrombin, and isolated but well-defined density for Tyr-8f at position P9 in the hydrophobic pocket of thrombin. The tyrosine residue is shifted relative to phenylalanine in the native peptide because the phenol side chain is larger and makes a novel, intrapeptide hydrogen bond with Gly-14f. Adjacent peptide residues cannot form the hydrogen bonds that stabilize the secondary structure of the native peptide. Consequently, the 'reaction'geometry at the scissile bond, eight residues from the mutation, is perturbed and the peptide is mostly uncleaved in the crystal structure.

Crystal structure of fibrinogen-Aalpha peptide 1-23 (F8Y) bound to bovine thrombin explains why the mutation of Phe-8 to tyrosine strongly inhibits normal cleavage at Arg-16.,Malkowski MG, Martin PD, Lord ST, Edwards BF Biochem J. 1997 Sep 15;326 ( Pt 3):815-22. PMID:9307032^[2]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Benson MD, Liepnieks J, Uemichi T, Wheeler G, Correa R. Hereditary renal amyloidosis associated with a mutant fibrinogen alpha-chain. Nat Genet. 1993 Mar;3(3):252-5. PMID:8097946 doi:http://dx.doi.org/10.1038/ng0393-252
↑ Malkowski MG, Martin PD, Lord ST, Edwards BF. Crystal structure of fibrinogen-Aalpha peptide 1-23 (F8Y) bound to bovine thrombin explains why the mutation of Phe-8 to tyrosine strongly inhibits normal cleavage at Arg-16. Biochem J. 1997 Sep 15;326 ( Pt 3):815-22. PMID:9307032

1 Structural highlights
2 Disease
3 Function
4 Evolutionary Conservation
5 Publication Abstract from PubMed
6 See Also
7 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/1ycp"

@@ Line 3: / Line 3: @@
 == Structural highlights ==
 <table><tr><td colspan='2'>[[1ycp]] is a 7 chain structure with sequence from [http://en.wikipedia.org/wiki/Bos_taurus Bos taurus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1YCP OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1YCP FirstGlance]. <br>
-</td></tr><tr><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Thrombin Thrombin], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.4.21.5 3.4.21.5] </span></td></tr>
+</td></tr><tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Thrombin Thrombin], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.4.21.5 3.4.21.5] </span></td></tr>
-<tr><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1ycp FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1ycp OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1ycp RCSB], [http://www.ebi.ac.uk/pdbsum/1ycp 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=1ycp FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1ycp OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1ycp RCSB], [http://www.ebi.ac.uk/pdbsum/1ycp PDBsum]</span></td></tr>
-<table>
+</table>
 == Disease ==
 [[http://www.uniprot.org/uniprot/FIBA_HUMAN FIBA_HUMAN]] Defects in FGA are a cause of congenital afibrinogenemia (CAFBN) [MIM:[http://omim.org/entry/202400 202400]]. This is a rare autosomal recessive disorder characterized by bleeding that varies from mild to severe and by complete absence or extremely low levels of plasma and platelet fibrinogen. Note=The majority of cases of afibrinogenemia are due to truncating mutations. Variations in position Arg-35 (the site of cleavage of fibrinopeptide a by thrombin) leads to alpha-dysfibrinogenemias.  Defects in FGA are a cause of amyloidosis type 8 (AMYL8) [MIM:[http://omim.org/entry/105200 105200]]; also known as systemic non-neuropathic amyloidosis or Ostertag-type amyloidosis. AMYL8 is a hereditary generalized amyloidosis due to deposition of apolipoprotein A1, fibrinogen and lysozyme amyloids. Viscera are particularly affected. There is no involvement of the nervous system. Clinical features include renal amyloidosis resulting in nephrotic syndrome, arterial hypertension, hepatosplenomegaly, cholestasis, petechial skin rash.<ref>PMID:8097946</ref>
@@ Line 37: / Line 37: @@
 [[Category: Bos taurus]]
 [[Category: Thrombin]]
-[[Category: Edwards, B F.P.]]
+[[Category: Edwards, B F.P]]
-[[Category: Malkowski, M G.]]
+[[Category: Malkowski, M G]]
 [[Category: Fibrinopeptide-a]]
 [[Category: Hydrolase-hydrolase substrate complex]]
-[[Category: Thrombin]]

1ycp

From Proteopedia

Revision as of 10:27, 8 January 2015

THE CRYSTAL STRUCTURE OF FIBRINOGEN-AA PEPTIDE 1-23 (F8Y) BOUND TO BOVINE THROMBIN EXPLAINS WHY THE MUTATION OF PHE-8 TO TYROSINE STRONGLY INHIBITS NORMAL CLEAVAGE AT ARGININE-16

Structural highlights

Disease

Function

Evolutionary Conservation

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

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