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3btk

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Revision as of 07:57, 31 October 2018

THE CRYSTAL STRUCTURES OF THE COMPLEXES BETWEEN BOVINE BETA-TRYPSIN AND TEN P1 VARIANTS OF BPTI

Structural highlights

3btk is a 2 chain structure with sequence from Bos taurus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	,
Activity:	Trypsin, with EC number 3.4.21.4
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[BPT1_BOVIN] Inhibits trypsin, kallikrein, chymotrypsin, and plasmin.

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 high-resolution X-ray structures have been determined for ten complexes formed between bovine beta-trypsin and P1 variants (Gly, Asp, Glu, Gln, Thr, Met, Lys, His, Phe, Trp) of bovine pancreatic trypsin inhibitor (BPTI). All the complexes were crystallised from the same conditions. The structures of the P1 variants Asp, Glu, Gln and Thr, are reported here for the first time in complex with any serine proteinase. The resolution of the structures ranged from 1.75 to 2.05 A and the R-factors were about 19-20 %. The association constants of the mutants ranged from 1.5x10(4) to 1.7x10(13) M-1. All the structures could be fitted into well-defined electron density, and all had very similar global conformations. All the P1 mutant side-chains could be accomodated at the primary binding site, but relative to the P1 Lys, there were small local changes within the P1-S1 interaction site. These comprised: (1) changes in the number and dynamics of water molecules inside the pocket; (2) multiple conformations and non-optimal dihedral angles for some of the P1 side-chains, Ser190 and Gln192; and (3) changes in temperature factors of the pocket walls as well as the introduced P1 side-chain. Binding of the cognate P1 Lys is characterised by almost optimal dihedral angles, hydrogen bonding distances and angles, in addition to considerably lower temperature factors. Thus, the trypsin S1 pocket seems to be designed particularly for lysine binding.

The crystal structures of the complexes between bovine beta-trypsin and ten P1 variants of BPTI.,Helland R, Otlewski J, Sundheim O, Dadlez M, Smalas AO J Mol Biol. 1999 Apr 16;287(5):923-42. PMID:10222201^[1]

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

References

↑ Helland R, Otlewski J, Sundheim O, Dadlez M, Smalas AO. The crystal structures of the complexes between bovine beta-trypsin and ten P1 variants of BPTI. J Mol Biol. 1999 Apr 16;287(5):923-42. PMID:10222201 doi:10.1006/jmbi.1999.2654

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/3btk"

@@ Line 1: / Line 1: @@
 ==THE CRYSTAL STRUCTURES OF THE COMPLEXES BETWEEN BOVINE BETA-TRYPSIN AND TEN P1 VARIANTS OF BPTI==
 <StructureSection load='3btk' size='340' side='right' caption='[[3btk]], [[Resolution|resolution]] 1.85&Aring;' scene=''>
@@ Line 5: / Line 6: @@
 </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr>
 <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Trypsin Trypsin], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.4.21.4 3.4.21.4] </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=3btk FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3btk OCA], [http://pdbe.org/3btk PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=3btk RCSB], [http://www.ebi.ac.uk/pdbsum/3btk 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=3btk FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3btk OCA], [http://pdbe.org/3btk PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=3btk RCSB], [http://www.ebi.ac.uk/pdbsum/3btk PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=3btk ProSAT]</span></td></tr>
 </table>
 == Function ==
@@ Line 13: / Line 14: @@
 Check<jmol>
   <jmolCheckbox>
-    <scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/bt/3btk_consurf.spt"</scriptWhenChecked>
+    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/bt/3btk_consurf.spt"</scriptWhenChecked>
     <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
     <text>to colour the structure by Evolutionary Conservation</text>

3btk

From Proteopedia

Revision as of 07:57, 31 October 2018

THE CRYSTAL STRUCTURES OF THE COMPLEXES BETWEEN BOVINE BETA-TRYPSIN AND TEN P1 VARIANTS OF BPTI

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

See Also

References

Contents

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