4NZT

Crystal structure of the antibody-binding region of Protein M (Protein M TD) in complex with anti-infleunza hemagglutinin antibody CR9114 Fab


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.177 
  • R-Value Observed: 0.181 

Starting Models: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

A structurally distinct human mycoplasma protein that generically blocks antigen-antibody union.

Grover, R.K.Zhu, X.Nieusma, T.Jones, T.Boero, I.MacLeod, A.S.Mark, A.Niessen, S.Kim, H.J.Kong, L.Assad-Garcia, N.Kwon, K.Chesi, M.Smider, V.V.Salomon, D.R.Jelinek, D.F.Kyle, R.A.Pyles, R.B.Glass, J.I.Ward, A.B.Wilson, I.A.Lerner, R.A.

(2014) Science 343: 656-661

  • DOI: https://doi.org/10.1126/science.1246135
  • Primary Citation of Related Structures:  
    4NZR, 4NZT, 4NZU

  • PubMed Abstract: 

    We report the discovery of a broadly reactive antibody-binding protein (Protein M) from human mycoplasma. The crystal structure of the ectodomain of transmembrane Protein M differs from other known protein structures, as does its mechanism of antibody binding. Protein M binds with high affinity to all types of human and nonhuman immunoglobulin G, predominantly through attachment to the conserved portions of the variable region of the κ and λ light chains. Protein M blocks antibody-antigen union, likely because of its large C-terminal domain extending over the antibody-combining site, blocking entry to large antigens. Similar to the other immunoglobulin-binding proteins such as Protein A, Protein M as well as its orthologs in other Mycoplasma species could become invaluable reagents in the antibody field.


  • Organizational Affiliation

    Department of Cell and Molecular Biology, The Scripps Research Institute, La Jolla, CA 92037, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Protein M TDA [auth M]416Mycoplasmoides genitalium G37Mutation(s): 0 
Gene Names: MG281
UniProt
Find proteins for P47523 (Mycoplasma genitalium (strain ATCC 33530 / DSM 19775 / NCTC 10195 / G37))
Explore P47523 
Go to UniProtKB:  P47523
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP47523
Sequence Annotations
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  • Reference Sequence
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
CR9114 heavy chainB [auth H]230Homo sapiensMutation(s): 0 
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
CR9114 light chainC [auth L]216Homo sapiensMutation(s): 0 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.177 
  • R-Value Observed: 0.181 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 69.865α = 90
b = 91.468β = 90
c = 126.51γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
PHASERphasing
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2014-02-19
    Type: Initial release
  • Version 1.1: 2023-09-20
    Changes: Data collection, Database references, Refinement description
  • Version 1.2: 2024-10-16
    Changes: Structure summary