Thermostable variant of human carbonic anhydrase with disordered tetrazine 2.0 reacted with strained trans-cyclooctene at site 233

Experimental Data Snapshot

  • Resolution: 1.30 Å
  • R-Value Free: 0.178 
  • R-Value Work: 0.154 
  • R-Value Observed: 0.155 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report

This is version 1.4 of the entry. See complete history


Immobilization of Proteins with Controlled Load and Orientation.

Bednar, R.M.Golbek, T.W.Kean, K.M.Brown, W.J.Jana, S.Baio, J.E.Karplus, P.A.Mehl, R.A.

(2019) ACS Appl Mater Interfaces 11: 36391-36398

  • DOI: https://doi.org/10.1021/acsami.9b12746
  • Primary Citation of Related Structures:  
    6NJ2, 6NJ3, 6NJ4, 6NJ5, 6NJ6

  • PubMed Abstract: 

    Biomaterials based on immobilized proteins are key elements of many biomedical and industrial technologies. However, applications are limited by an inability to precisely construct materials of high homogeneity and defined content. We present here a general "protein-limited immobilization" strategy by combining the rapid, bioorthogonal, and biocompatible properties of a tetrazine-strained trans -cyclooctene reaction with genetic code expansion to site-specifically place the tetrazine into a protein. For the first time, we use this strategy to immobilize defined amounts of oriented proteins onto beads and flat surfaces in under 5 min at submicromolar concentrations without compromising activity. This approach opens the door to generating and studying diverse protein-based biomaterials that are much more precisely defined and characterized, providing a greater ability to engineer properties across a wide range of applications.

  • Organizational Affiliation

    Department of Biochemistry and Biophysics , Oregon State University , 2011 Agricultural & Life Sciences Building , Corvallis , Oregon 97331-7305 , United States.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Carbonic anhydrase 2266Homo sapiensMutation(s): 7 
Gene Names: CA2
UniProt & NIH Common Fund Data Resources
Find proteins for P00918 (Homo sapiens)
Explore P00918 
Go to UniProtKB:  P00918
GTEx:  ENSG00000104267 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP00918
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on ZN

Download Ideal Coordinates CCD File 
B [auth A]ZINC ION
Modified Residues  1 Unique
IDChains TypeFormula2D DiagramParent
Query on DJD
Experimental Data & Validation

Experimental Data

  • Resolution: 1.30 Å
  • R-Value Free: 0.178 
  • R-Value Work: 0.154 
  • R-Value Observed: 0.155 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 44.079α = 90
b = 72.46β = 90
c = 152.108γ = 90
Software Package:
Software NamePurpose
iMOSFLMdata reduction
Aimlessdata scaling

Structure Validation

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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
National Science Foundation (NSF, United States)United StatesNSF MCB-1518265

Revision History  (Full details and data files)

  • Version 1.0: 2019-10-02
    Type: Initial release
  • Version 1.1: 2019-10-23
    Changes: Data collection, Database references
  • Version 1.2: 2019-11-27
    Changes: Author supporting evidence
  • Version 1.3: 2020-10-28
    Changes: Database references, Derived calculations
  • Version 1.4: 2023-10-11
    Changes: Advisory, Data collection, Database references, Refinement description