1OAU

Experimental Data Snapshot

wwPDB Validation 3D Report Full Report

Ligand Structure Quality Assessment

This is version 1.2 of the entry. See complete history.

Literature

(2003) Science 299: 1362

PubMed: 12610298 Search on PubMed
DOI: https://doi.org/10.1126/science.1079731
Primary Citation of Related Structures:
1OAQ, 1OAR, 1OAU, 1OAX, 1OAY, 1OAZ, 1OCW

PubMed Abstract:
A single antibody was shown to adopt different binding-site conformations and thereby bind unrelated antigens. Analysis by both x-ray crystallography and pre-steady-state kinetics revealed an equilibrium between different preexisting isomers, one of which possessed a promiscuous, low-affinity binding site for aromatic ligands, including the immunizing hapten. A subsequent induced-fit isomerization led to high-affinity complexes with a deep and narrow binding site. A protein antigen identified by repertoire selection made use of an unrelated antibody isomer with a wide, shallow binding site. Conformational diversity, whereby one sequence adopts multiple structures and multiple functions, can increase the effective size of the antibody repertoire but may also lead to autoimmunity and allergy.

Organizational Affiliation

Centre for Protein Engineering, Medical Research Council Centre, Hills Road, Cambridge CB2 2HQ, UK.

Macromolecule Content

Macromolecules

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(by identity cutoff) | 3D Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
IMMUNOGLOBULIN E	A [auth H], B [auth I], C [auth J], D [auth K]	122	Mus musculus	Mutation(s): 0
Entity Groups
Sequence Clusters	30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
Sequence Annotations Expand
Reference Sequence

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(by identity cutoff) | 3D Structure

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
IMMUNOGLOBULIN E	E [auth L], F [auth M], G [auth N], H [auth O]	110	Mus musculus	Mutation(s): 0
UniProt
Find proteins for P01724 (Mus musculus) Explore P01724 Go to UniProtKB: P01724
Entity Groups
Sequence Clusters	30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt Group	P01724
Sequence Annotations Expand
Reference Sequence

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
DNF Query on DNF Download Ideal Coordinates CCD File SDF format, chain J [auth H] SDF format, chain L [auth J] MOL2 format, chain J [auth H] MOL2 format, chain L [auth J] mmCIF format, chain J [auth H] mmCIF format, chain L [auth J]	J [auth H], L [auth J]	2,4-DINITROPHENOL C₆ H₄ N₂ O₅ UFBJCMHMOXMLKC-UHFFFAOYSA-N		Interactions Focus chain J [auth H] Focus chain L [auth J]
SER Query on SER Download Ideal Coordinates CCD File SDF format, chain I [auth H] SDF format, chain K [auth J] MOL2 format, chain I [auth H] MOL2 format, chain K [auth J] mmCIF format, chain I [auth H] mmCIF format, chain K [auth J]	I [auth H], K [auth J]	SERINE C₃ H₇ N O₃ MTCFGRXMJLQNBG-REOHCLBHSA-N		Interactions Focus chain I [auth H] Focus chain K [auth J]
IMD Query on IMD Download Ideal Coordinates CCD File SDF format, chain M [auth L] SDF format, chain N MOL2 format, chain M [auth L] MOL2 format, chain N mmCIF format, chain M [auth L] mmCIF format, chain N	M [auth L], N	IMIDAZOLE C₃ H₅ N₂ RAXXELZNTBOGNW-UHFFFAOYSA-O		Interactions Focus chain M [auth L] Focus chain N

Experimental Data & Validation

Unit Cell:

Software Package:

Entry History

Deposition Author(s):

James, L.C.

Version 1.0: 2004-01-15
Type: Initial release
Version 1.1: 2013-10-30
Changes: Derived calculations, Other, Source and taxonomy, Version format compliance
Version 1.2: 2024-10-23
Changes: Data collection, Database references, Derived calculations, Other, Structure summary