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1hil

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[[Image:1hil.gif|left|200px]]
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{{STRUCTURE_1hil| PDB=1hil | SCENE= }}
{{STRUCTURE_1hil| PDB=1hil | SCENE= }}
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'''STRUCTURAL EVIDENCE FOR INDUCED FIT AS A MECHANISM FOR ANTIGEN-ANTIBODY RECOGNITION'''
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===STRUCTURAL EVIDENCE FOR INDUCED FIT AS A MECHANISM FOR ANTIGEN-ANTIBODY RECOGNITION===
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==Overview==
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The three-dimensional structure of a specific antibody (Fab 17/9) to a peptide immunogen from influenza virus hemagglutinin [HA1(75-110)] and two independent crystal complexes of this antibody with bound peptide (TyrP100-LeuP108) have been determined by x-ray crystallographic techniques at 2.0 A, 2.9 A, and 3.1 A resolution, respectively. The nonapeptide antigen assumes a type I beta turn in the antibody combining site and interacts primarily with the Fab hypervariable loops L3, H2, and H3. Comparison of the bound and unbound Fab structures shows that a major rearrangement in the H3 loop accompanies antigen binding. This conformational change results in the creation of a binding pocket for the beta turn of the peptide, allowing TyrP105 to be accommodated. The conformation of the peptide bound to the antibody shows similarity to its cognate sequence in the HA1, suggesting a possible mechanism for the cross-reactivity of this Fab with monomeric hemagglutinin. The structures of the free and antigen bound antibodies demonstrate the flexibility of the antibody combining site and provide an example of induced fit as a mechanism for antibody-antigen recognition.
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The line below this paragraph, {{ABSTRACT_PUBMED_1546293}}, adds the Publication Abstract to the page
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(as it appears on PubMed at http://www.pubmed.gov), where 1546293 is the PubMed ID number.
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{{ABSTRACT_PUBMED_1546293}}
==About this Structure==
==About this Structure==
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[[Category: Wilson, I A.]]
[[Category: Wilson, I A.]]
[[Category: Immunoglobulin]]
[[Category: Immunoglobulin]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 18:52:55 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Jul 1 08:14:03 2008''

Revision as of 05:14, 1 July 2008

Image:1hil.png

Template:STRUCTURE 1hil

STRUCTURAL EVIDENCE FOR INDUCED FIT AS A MECHANISM FOR ANTIGEN-ANTIBODY RECOGNITION

Template:ABSTRACT PUBMED 1546293

About this Structure

1HIL is a Protein complex structure of sequences from Mus musculus. Full crystallographic information is available from OCA.

Reference

Structural evidence for induced fit as a mechanism for antibody-antigen recognition., Rini JM, Schulze-Gahmen U, Wilson IA, Science. 1992 Feb 21;255(5047):959-65. PMID:1546293

Page seeded by OCA on Tue Jul 1 08:14:03 2008

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