4NWT

Crystal structure of the anti-human NGF Fab APE1531


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.75 Å
  • R-Value Free: 0.181 
  • R-Value Work: 0.150 
  • R-Value Observed: 0.152 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Nucleotide insertions and deletions complement point mutations to massively expand the diversity created by somatic hypermutation of antibodies.

Bowers, P.M.Verdino, P.Wang, Z.da Silva Correia, J.Chhoa, M.Macondray, G.Do, M.Neben, T.Y.Horlick, R.A.Stanfield, R.L.Wilson, I.A.King, D.J.

(2014) J Biol Chem 289: 33557-33567

  • DOI: 10.1074/jbc.M114.607176
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • During somatic hypermutation (SHM), deamination of cytidine by activation-induced cytidine deaminase and subsequent DNA repair generates mutations within immunoglobulin V-regions. Nucleotide insertions and deletions (indels) have recently been shown ...

    During somatic hypermutation (SHM), deamination of cytidine by activation-induced cytidine deaminase and subsequent DNA repair generates mutations within immunoglobulin V-regions. Nucleotide insertions and deletions (indels) have recently been shown to be critical for the evolution of antibody binding. Affinity maturation of 53 antibodies using in vitro SHM in a non-B cell context was compared with mutation patterns observed for SHM in vivo. The origin and frequency of indels seen during in vitro maturation were similar to that in vivo. Indels are localized to CDRs, and secondary mutations within insertions further optimize antigen binding. Structural determination of an antibody matured in vitro and comparison with human-derived antibodies containing insertions reveal conserved patterns of antibody maturation. These findings indicate that activation-induced cytidine deaminase acting on V-region sequences is sufficient to initiate authentic formation of indels in vitro and in vivo and that point mutations, indel formation, and clonal selection form a robust tripartite system for antibody evolution.


    Organizational Affiliation

    From Anaptysbio Inc., San Diego, California 92121 and.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
APE1531 Ab Fab light chainL220Homo sapiensMutation(s): 0 
Find proteins for Q8TCD0 (Homo sapiens)
Explore Q8TCD0 
Go to UniProtKB:  Q8TCD0
Protein Feature View
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  • Reference Sequence

Find similar proteins by: Sequence  |  Structure

Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
APE1531 Ab Fab heavy chainH233Homo sapiensMutation(s): 0 
Gene Names: IGHG1
Find proteins for P01857 (Homo sapiens)
Explore P01857 
Go to UniProtKB:  P01857
NIH Common Fund Data Resources
PHAROS  P01857
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MES
Query on MES

Download CCD File 
L
2-(N-MORPHOLINO)-ETHANESULFONIC ACID
C6 H13 N O4 S
SXGZJKUKBWWHRA-UHFFFAOYSA-N
 Ligand Interaction
PGE
Query on PGE

Download CCD File 
H
TRIETHYLENE GLYCOL
C6 H14 O4
ZIBGPFATKBEMQZ-UHFFFAOYSA-N
 Ligand Interaction
ACT
Query on ACT

Download CCD File 
H, L
ACETATE ION
C2 H3 O2
QTBSBXVTEAMEQO-UHFFFAOYSA-M
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.75 Å
  • R-Value Free: 0.181 
  • R-Value Work: 0.150 
  • R-Value Observed: 0.152 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 127.72α = 90
b = 64.36β = 108.67
c = 63.81γ = 90
Software Package:
Software NamePurpose
WEB-ICEdata collection
PHASERphasing
REFMACrefinement
XDSdata reduction
SCALAdata scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-10-22
    Type: Initial release
  • Version 1.1: 2014-10-29
    Changes: Database references
  • Version 1.2: 2014-12-10
    Changes: Database references
  • Version 1.3: 2017-08-02
    Changes: Refinement description, Source and taxonomy