1MCB

PRINCIPLES AND PITFALLS IN DESIGNING SITE DIRECTED PEPTIDE LIGANDS


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Observed: 0.204 

wwPDB Validation   3D Report Full Report


This is version 1.4 of the entry. See complete history


Literature

Principles and pitfalls in designing site-directed peptide ligands.

Edmundson, A.B.Harris, D.L.Fan, Z.C.Guddat, L.W.Schley, B.T.Hanson, B.L.Tribbick, G.Geysen, H.M.

(1993) Proteins 16: 246-267

  • DOI: 10.1002/prot.340160304
  • Primary Citation of Related Structures:  
    1MCF, 1MCE, 1MCD, 1MCC, 1MCB, 1MCN, 1MCL, 1MCK, 1MCJ, 1MCI

  • PubMed Abstract: 
  • An immunoglobulin light chain dimer with a large generic binding cavity was used as a host molecule for designing a series of peptide guest ligands. In a screening procedure peptides coupled to solid supports were systematically tested for binding ac ...

    An immunoglobulin light chain dimer with a large generic binding cavity was used as a host molecule for designing a series of peptide guest ligands. In a screening procedure peptides coupled to solid supports were systematically tested for binding activity by enzyme linked immunosorbent assays (ELISA). Key members of the binding series were synthesized in milligram quantities and diffused into crystals of the host molecule for X-ray analyses. These peptides were incrementally increased in size and affinity until they nearly filled the cavity. Progressive changes in binding patterns were mapped by comparisons of crystallographically refined structures of 14 peptide-protein complexes at 2.7 A resolution. These comparisons led to guidelines for ligand design and also suggested ways to modify previously established binding patterns. By manipulating equilibria involving histidine, for example, it was possible to abolish one important intramolecular interaction of the bound ligand and substitute another. These events triggered a change in conformation of the ligand from a compact to an extended form and a comprehensive change in the mode of binding to the protein. In dipeptides of histidine and proline, protonation of both imidazolium nitrogen atoms was used to program an end-to-end reversal of the direction in which the ligand was inserted into the binding cavity. Peptides cocrystallized with proteins produced complexes somewhat different in structure from those in which ligands were diffused into preexisting crystals. In such a large and malleable cavity, space utilization was thus different when a ligand was introduced before the imposition of crystal packing restraints.


    Related Citations: 
    • The Binding of Opioid Peptides to the Mcg Light Chain Dimer: Flexible Keys and Adjustable Locks
      Edmundson, A.B., Ely, K.R., Herron, J.N., Cheson, B.D.
      (1987) Mol Immunol 24: 915
    • Binding of N-Formylated Chemotactic Peptides in Crystals of the Mcg Light Chain Dimer: Similarities with Neutrophil Receptors
      Edmundson, A.B., Ely, K.R.
      (1985) Mol Immunol 22: 463
    • A Search for Site-Filling Ligands in the Mcg Bence-Jones Dimer: Crystal Binding Studies of Fluorescent Compounds
      Edmundson, A.B., Ely, K.R., Herron, J.N., Cheson, B.D.
      (1984) Mol Immunol 7: 561
    • Binding of 2,4-Dinitrophenyl Compounds and Other Small Molecules to a Crystalline Lambdal-Type Bence-Jones Dimer
      Edmundson, A.B., Ely, K.R., Girling, R.L., Abola, E.E., Schiffer, M., Westholm, F.A., Fausch, M.D., Deutsch, H.F.
      (1974) Biochemistry 13: 3816

    Organizational Affiliation

    Harrington Cancer Center, Amarillo, Texas 79106.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
IMMUNOGLOBULIN LAMBDA DIMER MCG (LIGHT CHAIN)AB216Homo sapiensMutation(s): 0 
Gene Names: IGL@
Find proteins for Q6PIK1 (Homo sapiens)
Explore Q6PIK1 
Go to UniProtKB:  Q6PIK1
Protein Feature View
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  • Reference Sequence
  • Find similar proteins by:  Sequence   |   Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
PEPTIDE N-ACETYL-L-GLN-D-PHE-L-HIS-D-PRO-OHP5N/AMutation(s): 0 
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Observed: 0.204 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 72.3α = 90
b = 72.3β = 90
c = 185.9γ = 120
Software Package:
Software NamePurpose
X-PLORmodel building
PROLSQrefinement
X-PLORrefinement
X-PLORphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1994-01-31
    Type: Initial release
  • Version 1.1: 2008-03-03
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2013-09-11
    Changes: Database references, Source and taxonomy
  • Version 1.4: 2017-11-29
    Changes: Derived calculations, Other