6O1F

Complex between soybean trypsin inhibitor beta1-tryptase and a humanized fab


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.15 Å
  • R-Value Free: 0.233 
  • R-Value Work: 0.190 
  • R-Value Observed: 0.191 

Starting Models: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

An Allosteric Anti-tryptase Antibody for the Treatment of Mast Cell-Mediated Severe Asthma.

Maun, H.R.Jackman, J.K.Choy, D.F.Loyet, K.M.Staton, T.L.Jia, G.Dressen, A.Hackney, J.A.Bremer, M.Walters, B.T.Vij, R.Chen, X.Trivedi, N.N.Morando, A.Lipari, M.T.Franke, Y.Wu, X.Zhang, J.Liu, J.Wu, P.Chang, D.Orozco, L.D.Christensen, E.Wong, M.Corpuz, R.Hang, J.Q.Lutman, J.Sukumaran, S.Wu, Y.Ubhayakar, S.Liang, X.Schwartz, L.B.Babina, M.Woodruff, P.G.Fahy, J.V.Ahuja, R.Caughey, G.H.Kusi, A.Dennis, M.S.Eigenbrot, C.Kirchhofer, D.Austin, C.D.Wu, L.C.Koerber, J.T.Lee, W.P.Yaspan, B.L.Alatsis, K.R.Arron, J.R.Lazarus, R.A.Yi, T.

(2019) Cell 179: 417-431.e19

  • DOI: https://doi.org/10.1016/j.cell.2019.09.009
  • Primary Citation of Related Structures:  
    6O1F

  • PubMed Abstract: 

    Severe asthma patients with low type 2 inflammation derive less clinical benefit from therapies targeting type 2 cytokines and represent an unmet need. We show that mast cell tryptase is elevated in severe asthma patients independent of type 2 biomarker status. Active β-tryptase allele count correlates with blood tryptase levels, and asthma patients carrying more active alleles benefit less from anti-IgE treatment. We generated a noncompetitive inhibitory antibody against human β-tryptase, which dissociates active tetramers into inactive monomers. A 2.15 Å crystal structure of a β-tryptase/antibody complex coupled with biochemical studies reveal the molecular basis for allosteric destabilization of small and large interfaces required for tetramerization. This anti-tryptase antibody potently blocks tryptase enzymatic activity in a humanized mouse model, reducing IgE-mediated systemic anaphylaxis, and inhibits airway tryptase in Ascaris-sensitized cynomolgus monkeys with favorable pharmacokinetics. These data provide a foundation for developing anti-tryptase as a clinical therapy for severe asthma.


  • Organizational Affiliation

    Department of Early Discovery Biochemistry, Genentech, Inc., 1 DNA Way, South San Francisco, CA 94080, USA.


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Tryptase alpha/beta-1260Homo sapiensMutation(s): 0 
Gene Names: TPSAB1TPS1TPS2TPSB1
EC: 3.4.21.59
UniProt & NIH Common Fund Data Resources
Find proteins for Q15661 (Homo sapiens)
Explore Q15661 
Go to UniProtKB:  Q15661
PHAROS:  Q15661
GTEx:  ENSG00000172236 
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UniProt GroupQ15661
Sequence Annotations
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  • Reference Sequence
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Heavy Chain hu31A.v11B [auth H]227Homo sapiensMutation(s): 0 
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  • Reference Sequence
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
Trypsin inhibitor AC [auth I]192Glycine maxMutation(s): 0 
Gene Names: KTI3
UniProt
Find proteins for P01070 (Glycine max)
Explore P01070 
Go to UniProtKB:  P01070
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UniProt GroupP01070
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Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
Light Chain hu31A.v11D [auth L]213Homo sapiensMutation(s): 0 
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.15 Å
  • R-Value Free: 0.233 
  • R-Value Work: 0.190 
  • R-Value Observed: 0.191 
  • Space Group: P 62 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 128.52α = 90
b = 128.52β = 90
c = 245.88γ = 120
Software Package:
Software NamePurpose
BUSTERrefinement
HKL-2000data reduction
SCALEPACKdata scaling
PHASERphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2019-10-16
    Type: Initial release
  • Version 1.1: 2023-10-11
    Changes: Data collection, Database references, Refinement description