Crystal structure of ANGEL2, a 2',3'-cyclic phosphatase

Experimental Data Snapshot

  • Resolution: 1.45 Å
  • R-Value Free: 0.156 
  • R-Value Work: 0.132 
  • R-Value Observed: 0.133 

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ANGEL2 is a member of the CCR4 family of deadenylases with 2',3'-cyclic phosphatase activity.

Pinto, P.H.Kroupova, A.Schleiffer, A.Mechtler, K.Jinek, M.Weitzer, S.Martinez, J.

(2020) Science 369: 524-530

  • DOI: https://doi.org/10.1126/science.aba9763
  • Primary Citation of Related Structures:  
    6RVZ, 6RW0

  • PubMed Abstract: 

    RNA molecules are frequently modified with a terminal 2',3'-cyclic phosphate group as a result of endonuclease cleavage, exonuclease trimming, or de novo synthesis. During pre-transfer RNA (tRNA) and unconventional messenger RNA (mRNA) splicing, 2',3'-cyclic phosphates are substrates of the tRNA ligase complex, and their removal is critical for recycling of tRNAs upon ribosome stalling. We identified the predicted deadenylase angel homolog 2 (ANGEL2) as a human phosphatase that converts 2',3'-cyclic phosphates into 2',3'-OH nucleotides. We analyzed ANGEL2's substrate preference, structure, and reaction mechanism. Perturbing ANGEL2 expression affected the efficiency of pre-tRNA processing, X-box-binding protein 1 ( XBP1 ) mRNA splicing during the unfolded protein response, and tRNA nucleotidyltransferase 1 (TRNT1)-mediated CCA addition onto tRNAs. Our results indicate that ANGEL2 is involved in RNA pathways that rely on the ligation or hydrolysis of 2',3'-cyclic phosphates.

  • Organizational Affiliation

    Research Institute of Molecular Pathology, Vienna BioCenter, 1030 Vienna, Austria.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Protein angel homolog 2429Homo sapiensMutation(s): 0 
Gene Names: ANGEL2KIAA0759L
UniProt & NIH Common Fund Data Resources
Find proteins for Q5VTE6 (Homo sapiens)
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Go to UniProtKB:  Q5VTE6
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ5VTE6
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.45 Å
  • R-Value Free: 0.156 
  • R-Value Work: 0.132 
  • R-Value Observed: 0.133 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 98.401α = 90
b = 98.401β = 90
c = 93.342γ = 120
Software Package:
Software NamePurpose
XDSdata reduction
XSCALEdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2020-05-20
    Type: Initial release
  • Version 1.1: 2020-08-12
    Changes: Database references, Derived calculations