2ihl
From Proteopedia
(New page: 200px<br /> <applet load="2ihl" size="450" color="white" frame="true" align="right" spinBox="true" caption="2ihl, resolution 1.4Å" /> '''LYSOZYME (E.C.3.2.1....) |
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| - | [[Image:2ihl.gif|left|200px]]<br /> | + | [[Image:2ihl.gif|left|200px]]<br /><applet load="2ihl" size="350" color="white" frame="true" align="right" spinBox="true" |
| - | <applet load="2ihl" size=" | + | |
caption="2ihl, resolution 1.4Å" /> | caption="2ihl, resolution 1.4Å" /> | ||
'''LYSOZYME (E.C.3.2.1.17) (JAPANESE QUAIL)'''<br /> | '''LYSOZYME (E.C.3.2.1.17) (JAPANESE QUAIL)'''<br /> | ||
==Overview== | ==Overview== | ||
| - | Although antibodies are highly specific, cross-reactions are frequently | + | Although antibodies are highly specific, cross-reactions are frequently observed. To understand the molecular basis of this phenomenon, we studied the anti-hen egg lysozyme (HEL) monoclonal antibody (mAb) D11.15, which cross-reacts with several avian lysozymes, in some cases with a higher affinity (heteroclitic binding) than for HEL. We have determined the crystal structure of the Fv fragment of D11.15 complexed with pheasant egg lysozyme (PHL). In addition, we have determined the structure of PHL, Guinea fowl egg lysozyme, and Japanese quail egg lysozyme. Differences in the affinity of D11.15 for the lysozymes appear to result from sequence substitutions in these antigens at the interface with the antibody. More generally, cross-reactivity is seen to require a stereochemically permissive environment for the variant antigen residues at the antibody-antigen interface. |
==About this Structure== | ==About this Structure== | ||
| - | 2IHL is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Coturnix_japonica Coturnix japonica] with NA as [http://en.wikipedia.org/wiki/ligand ligand]. Active as [http://en.wikipedia.org/wiki/Lysozyme Lysozyme], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.2.1.17 3.2.1.17] Full crystallographic information is available from [http:// | + | 2IHL is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Coturnix_japonica Coturnix japonica] with <scene name='pdbligand=NA:'>NA</scene> as [http://en.wikipedia.org/wiki/ligand ligand]. Active as [http://en.wikipedia.org/wiki/Lysozyme Lysozyme], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.2.1.17 3.2.1.17] Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2IHL OCA]. |
==Reference== | ==Reference== | ||
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[[Category: Lysozyme]] | [[Category: Lysozyme]] | ||
[[Category: Single protein]] | [[Category: Single protein]] | ||
| - | [[Category: Bentley, G | + | [[Category: Bentley, G A.]] |
[[Category: Houdusse, A.]] | [[Category: Houdusse, A.]] | ||
| - | [[Category: Poljak, R | + | [[Category: Poljak, R J.]] |
[[Category: Souchon, H.]] | [[Category: Souchon, H.]] | ||
[[Category: Zhang, Z.]] | [[Category: Zhang, Z.]] | ||
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[[Category: hydrolase(o-glycosyl)]] | [[Category: hydrolase(o-glycosyl)]] | ||
| - | ''Page seeded by [http:// | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 17:52:45 2008'' |
Revision as of 15:52, 21 February 2008
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LYSOZYME (E.C.3.2.1.17) (JAPANESE QUAIL)
Overview
Although antibodies are highly specific, cross-reactions are frequently observed. To understand the molecular basis of this phenomenon, we studied the anti-hen egg lysozyme (HEL) monoclonal antibody (mAb) D11.15, which cross-reacts with several avian lysozymes, in some cases with a higher affinity (heteroclitic binding) than for HEL. We have determined the crystal structure of the Fv fragment of D11.15 complexed with pheasant egg lysozyme (PHL). In addition, we have determined the structure of PHL, Guinea fowl egg lysozyme, and Japanese quail egg lysozyme. Differences in the affinity of D11.15 for the lysozymes appear to result from sequence substitutions in these antigens at the interface with the antibody. More generally, cross-reactivity is seen to require a stereochemically permissive environment for the variant antigen residues at the antibody-antigen interface.
About this Structure
2IHL is a Single protein structure of sequence from Coturnix japonica with as ligand. Active as Lysozyme, with EC number 3.2.1.17 Full crystallographic information is available from OCA.
Reference
Three-dimensional structure of a heteroclitic antigen-antibody cross-reaction complex., Chitarra V, Alzari PM, Bentley GA, Bhat TN, Eisele JL, Houdusse A, Lescar J, Souchon H, Poljak RJ, Proc Natl Acad Sci U S A. 1993 Aug 15;90(16):7711-5. PMID:8356074
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