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2ody

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Revision as of 02:17, 12 September 2015

Thrombin-bound boophilin displays a functional and accessible reactive-site loop

Structural highlights

2ody is a 6 chain structure with sequence from Boophilus microplus and Bos taurus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	, ,
Activity:	Thrombin, with EC number 3.4.21.5
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum

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). [BOOH2_BOOMI] Prevents blood clot formation to allow successful feeding and digestion through its inhibition activity of thrombin and other host anticoagulating factors like kallikrein, coagulation factor VII, or plasmin.^[1]

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

Inhibitors of coagulation factors from blood-feeding animals display a wide variety of structural motifs and inhibition mechanisms. We have isolated a novel inhibitor from the cattle tick Boophilus microplus, one of the most widespread parasites of farm animals. The inhibitor, which we have termed boophilin, has been cloned and overexpressed in Escherichia coli. Mature boophilin is composed of two canonical Kunitz-type domains, and inhibits not only the major procoagulant enzyme, thrombin, but in addition, and by contrast to all other previously characterised natural thrombin inhibitors, significantly interferes with the proteolytic activity of other serine proteinases such as trypsin and plasmin. The crystal structure of the bovine alpha-thrombin.boophilin complex, refined at 2.35 A resolution reveals a non-canonical binding mode to the proteinase. The N-terminal region of the mature inhibitor, Q16-R17-N18, binds in a parallel manner across the active site of the proteinase, with the guanidinium group of R17 anchored in the S(1) pocket, while the C-terminal Kunitz domain is negatively charged and docks into the basic exosite I of thrombin. This binding mode resembles the previously characterised thrombin inhibitor, ornithodorin which, unlike boophilin, is composed of two distorted Kunitz modules. Unexpectedly, both boophilin domains adopt markedly different orientations when compared to those of ornithodorin, in its complex with thrombin. The N-terminal boophilin domain rotates 9 degrees and is displaced by 6 A, while the C-terminal domain rotates almost 6 degrees accompanied by a 3 A displacement. The reactive-site loop of the N-terminal Kunitz domain of boophilin with its P(1) residue, K31, is fully solvent exposed and could thus bind a second trypsin-like proteinase without sterical restraints. This finding explains the formation of a ternary thrombin.boophilin.trypsin complex, and suggests a mechanism for prothrombinase inhibition in vivo.

Isolation, cloning and structural characterisation of boophilin, a multifunctional kunitz-type proteinase inhibitor from the cattle tick.,Macedo-Ribeiro S, Almeida C, Calisto BM, Friedrich T, Mentele R, Sturzebecher J, Fuentes-Prior P, Pereira PJ PLoS ONE. 2008 Feb 20;3(2):e1624. PMID:18286181^[2]

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

References

↑ Macedo-Ribeiro S, Almeida C, Calisto BM, Friedrich T, Mentele R, Sturzebecher J, Fuentes-Prior P, Pereira PJ. Isolation, cloning and structural characterisation of boophilin, a multifunctional kunitz-type proteinase inhibitor from the cattle tick. PLoS ONE. 2008 Feb 20;3(2):e1624. PMID:18286181 doi:http://dx.doi.org/10.1371/journal.pone.0001624
↑ Macedo-Ribeiro S, Almeida C, Calisto BM, Friedrich T, Mentele R, Sturzebecher J, Fuentes-Prior P, Pereira PJ. Isolation, cloning and structural characterisation of boophilin, a multifunctional kunitz-type proteinase inhibitor from the cattle tick. PLoS ONE. 2008 Feb 20;3(2):e1624. PMID:18286181 doi:http://dx.doi.org/10.1371/journal.pone.0001624

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

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/2ody"

@@ Line 2: / Line 2: @@
 <StructureSection load='2ody' size='340' side='right' caption='[[2ody]], [[Resolution|resolution]] 2.35&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[2ody]] is a 6 chain structure with sequence from [http://en.wikipedia.org/wiki/Bos_taurus Bos taurus] and [http://en.wikipedia.org/wiki/Rhipicephalus_microplus Rhipicephalus microplus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2ODY OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2ODY FirstGlance]. <br>
+<table><tr><td colspan='2'>[[2ody]] is a 6 chain structure with sequence from [http://en.wikipedia.org/wiki/Boophilus_microplus Boophilus microplus] and [http://en.wikipedia.org/wiki/Bos_taurus Bos taurus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2ODY OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2ODY FirstGlance]. <br>
 </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=NA:SODIUM+ION'>NA</scene>, <scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene>, <scene name='pdbligand=PO4:PHOSPHATE+ION'>PO4</scene></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 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=2ody FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2ody OCA], [http://www.rcsb.org/pdb/explore.do?structureId=2ody RCSB], [http://www.ebi.ac.uk/pdbsum/2ody 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=2ody FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2ody OCA], [http://pdbe.org/2ody PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2ody RCSB], [http://www.ebi.ac.uk/pdbsum/2ody PDBsum]</span></td></tr>
 </table>
 == Function ==
-[[http://www.uniprot.org/uniprot/THRB_BOVIN 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). [[http://www.uniprot.org/uniprot/Q8WPI2_BOOMI Q8WPI2_BOOMI]] Prevents blood clot formation to allow successful feeding and digestion through its inhibition activity of thrombin and other host anticoagulating factors like kallikrein, coagulation factor VII, or plasmin.
+[[http://www.uniprot.org/uniprot/THRB_BOVIN 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). [[http://www.uniprot.org/uniprot/BOOH2_BOOMI BOOH2_BOOMI]] Prevents blood clot formation to allow successful feeding and digestion through its inhibition activity of thrombin and other host anticoagulating factors like kallikrein, coagulation factor VII, or plasmin.<ref>PMID:18286181</ref>
 == Evolutionary Conservation ==
 [[Image:Consurf_key_small.gif|200px|right]]
@@ Line 27: / Line 27: @@
 From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
 </div>
+<div class="pdbe-citations 2ody" style="background-color:#fffaf0;"></div>
 ==See Also==
@@ Line 34: / Line 35: @@
 __TOC__
 </StructureSection>
+[[Category: Boophilus microplus]]
 [[Category: Bos taurus]]
-[[Category: Rhipicephalus microplus]]
 [[Category: Thrombin]]
 [[Category: Fuentes-Prior, P]]

2ody

From Proteopedia

Revision as of 02:17, 12 September 2015

Thrombin-bound boophilin displays a functional and accessible reactive-site loop

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

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