1l7t

From Proteopedia

(Difference between revisions)

Current revision

Crystal Structure Analysis of the anti-testosterone Fab fragment

Structural highlights

1l7t is a 2 chain structure with sequence from Mus musculus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:	X-ray diffraction, Resolution 2.1Å
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

Q65ZC0_MOUSE

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 highly selective, high affinity recombinant anti-testosterone Fab fragment has been generated by stepwise optimization of the complementarity-determining regions (CDRs) by random mutagenesis and phage display selection of a monoclonal antibody (3-C(4)F(5)). The best mutant (77 Fab) was obtained by evaluating the additivity effects of different independently selected CDR mutations. The 77 Fab contains 20 mutations and has about 40-fold increased affinity (K(d) = 3 x 10(-10) m) when compared with the wild-type (3-C(4)F(5)) Fab. To obtain structural insight into factors, which are needed to improve binding properties, we have determined the crystal structures of the mutant 77 Fab fragment with (2.15 A) and without testosterone (2.10 A) and compared these with previously determined wild-type structures. The overall testosterone binding of the 77 Fab is similar to that of the wild-type. The improved affinity and specificity of the 77 Fab fragment are due to more comprehensive packing of the testosterone with the protein, which is the result of small structural changes within the variable domains. Only one important binding site residue Glu-95 of the heavy chain CDR3 is mutated to alanine in the 77 Fab fragment. This mutation, originally selected from the phage library based on improved specificity, provides more free space for the testosterone D-ring. The light chain CDR1 of 77 Fab containing eight mutations has the most significant effect on the improved affinity, although it has no direct contact with the testosterone. The mutations of CDR-L1 cause a rearrangement in its conformation, leading to an overall fine reshaping of the binding site.

Crystal structure of an in vitro affinity- and specificity-matured anti-testosterone Fab in complex with testosterone. Improved affinity results from small structural changes within the variable domains.,Valjakka J, Hemminki A, Niemi S, Soderlund H, Takkinen K, Rouvinen J J Biol Chem. 2002 Nov 15;277(46):44021-7. Epub 2002 Aug 23. PMID:12196551^[1]

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

References

↑ Valjakka J, Hemminki A, Niemi S, Soderlund H, Takkinen K, Rouvinen J. Crystal structure of an in vitro affinity- and specificity-matured anti-testosterone Fab in complex with testosterone. Improved affinity results from small structural changes within the variable domains. J Biol Chem. 2002 Nov 15;277(46):44021-7. Epub 2002 Aug 23. PMID:12196551 doi:10.1074/jbc.M208392200

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

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/1l7t"

@@ Line 1: / Line 1: @@
 ==Crystal Structure Analysis of the anti-testosterone Fab fragment==
-<StructureSection load='1l7t' size='340' side='right' caption='[[1l7t]], [[Resolution|resolution]] 2.10&Aring;' scene=''>
+<StructureSection load='1l7t' size='340' side='right'caption='[[1l7t]], [[Resolution|resolution]] 2.10&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[1l7t]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Mus_musculus Mus musculus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1L7T OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1L7T FirstGlance]. <br>
+<table><tr><td colspan='2'>[[1l7t]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Mus_musculus Mus musculus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1L7T OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1L7T FirstGlance]. <br>
-</td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1l7s|1l7s]]</td></tr>
+</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.1&#8491;</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=1l7t FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1l7t OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1l7t RCSB], [http://www.ebi.ac.uk/pdbsum/1l7t PDBsum]</span></td></tr>
+<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1l7t FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1l7t OCA], [https://pdbe.org/1l7t PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1l7t RCSB], [https://www.ebi.ac.uk/pdbsum/1l7t PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1l7t ProSAT]</span></td></tr>
 </table>
+== Function ==
+[https://www.uniprot.org/uniprot/Q65ZC0_MOUSE Q65ZC0_MOUSE]
 == Evolutionary Conservation ==
 [[Image:Consurf_key_small.gif|200px|right]]
 Check<jmol>
   <jmolCheckbox>
-    <scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/l7/1l7t_consurf.spt"</scriptWhenChecked>
+    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/l7/1l7t_consurf.spt"</scriptWhenChecked>
-    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
+    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview03.spt</scriptWhenUnchecked>
     <text>to colour the structure by Evolutionary Conservation</text>
   </jmolCheckbox>
-</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/chain_selection.php?pdb_ID=2ata ConSurf].
+</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=1l7t ConSurf].
 <div style="clear:both"></div>
 <div style="background-color:#fffaf0;">
@@ Line 24: / Line 27: @@
 From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
 </div>
+<div class="pdbe-citations 1l7t" style="background-color:#fffaf0;"></div>
 == References ==
 <references/>
 __TOC__
 </StructureSection>
+[[Category: Large Structures]]
 [[Category: Mus musculus]]
-[[Category: Hemminki, A]]
+[[Category: Hemminki A]]
-[[Category: Niemi, S]]
+[[Category: Niemi S]]
-[[Category: Rouvinen, J]]
+[[Category: Rouvinen J]]
-[[Category: Soderlund, H]]
+[[Category: Soderlund H]]
-[[Category: Takkinen, K]]
+[[Category: Takkinen K]]
-[[Category: Valjakka, J]]
+[[Category: Valjakka J]]
-[[Category: Affinity and specificity matured]]
-[[Category: Anti-testosterone]]
-[[Category: Fab fragment]]
-[[Category: Immune system]]

1l7t

From Proteopedia

Current revision

Crystal Structure Analysis of the anti-testosterone Fab fragment

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

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