11GZ | pdb_000011gz

TEP1 TIR/DUF4062 domain

• PDB DOI: https://doi.org/10.2210/pdb11GZ/pdb

• Classification: HYDROLASE
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2026-02-23 Released: 2026-05-20 
• Deposition Author(s): Osinski, A., Tomchick, D.R., Tagliabracci, V.S.
• Funding Organization(s): Howard Hughes Medical Institute (HHMI), National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS), Welch Foundation, Cancer Prevention and Research Institute of Texas (CPRIT)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.44 Å
• R-Value Free: 
  0.287 (Depositor), 0.288 (DCC) 
• R-Value Work: 
  0.236 (Depositor), 0.237 (DCC) 
• R-Value Observed: 
  0.241 (Depositor) 

Starting Model: in silico

Literature

TIR-like NADases act in bacterial immunity and the RNA vault

Osinski, A., Mayro, B., Lopez, V.A., Schrad, J., Choi, H., Tomchick, D.R., Pawlowski, K., Forsberg, K., Shahmoradian, S.H., Tagliabracci, V.S.

(2026) bioRxiv 

• DOI: https://doi.org/10.64898/2026.05.01.722283

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content 

• Total Structure Weight: 25.63 kDa 
• Atom Count: 1,941 
• Modeled Residue Count: 220 
• Deposited Residue Count: 220 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Telomerase protein component 1	A	220	Homo sapiens	Mutation(s): 0  Gene Names: TEP1, TLP1, TP1
UniProt & NIH Common Fund Data Resources
Find proteins for Q99973 (Homo sapiens) Explore Q99973  Go to UniProtKB:  Q99973
PHAROS:  Q99973 GTEx:  ENSG00000129566

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
SO4	C [auth A]	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L
EDO	B [auth A], D [auth A]	1,2-ETHANEDIOL C2 H6 O2 LYCAIKOWRPUZTN-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.44 Å
• R-Value Free:  0.287 (Depositor), 0.288 (DCC) 
• R-Value Work:  0.236 (Depositor), 0.237 (DCC) 
• R-Value Observed: 0.241 (Depositor) 

Space Group: P 4₃ 3 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 132.762	α = 90
b = 132.762	β = 90
c = 132.762	γ = 90

Software Package:

Software Name	Purpose
PHENIX	refinement
BUSTER	refinement
ISOLDE	model building
Coot	model building
HKL-3000	data reduction
HKL-3000	data scaling
PHENIX	phasing

Structure Validation

Entry History 

& Funding Information

Deposition Data

• Released Date: 2026-05-20 
Deposition Author(s): Osinski, A., Tomchick, D.R., Tagliabracci, V.S.

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Funding Organization	Location	Grant Number
Howard Hughes Medical Institute (HHMI)	United States	--
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)	United States	R35GM158265
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)	United States	DP2GM137419
Welch Foundation	United States	I-1911
Cancer Prevention and Research Institute of Texas (CPRIT)	United States	RR150033

Revision History  

• Version 1.0: 2026-05-20
  Type: Initial release