21RS | pdb_000021rs

DRT4 homohexamer with dATP, dGTPaS, SSB, RNA

PDB DOI: https://doi.org/10.2210/pdb21RS/pdb
EM Map EMD-67950: EMDB EMDataResource

Classification: RNA BINDING PROTEIN
Organism(s): Enterobacteriaceae
Expression System: Escherichia coli
Mutation(s): No

Deposited: 2025-12-23 Released: 2026-05-27
Deposition Author(s): Xiao, J., Wang, L.
Funding Organization(s): Not funded

Experimental Data Snapshot

Method: ELECTRON MICROSCOPY
Resolution: 2.76 Å
Aggregation State: PARTICLE
Reconstruction Method: SINGLE PARTICLE

wwPDB Validation 3D Report Full Report

Validation slider image for 21RS

This is version 1.0 of the entry. See complete history.

Literature

DNA polymerization activates RNA cleavage of a reverse transcriptase-like antiviral enzyme

Rong, X., Xiao, J., Zhao, X., Yan, Y., Li, J., Chen, Y., Fan, Y., Liu, Z., Cao, Y., Chen, F., Cheng, R., Wang, X., Wang, L., Zhu, B.

(2026) Science

DOI: https://doi.org/10.1126/science.aef3178

Macromolecule Content

Total Structure Weight: 382.24 kDa
Atom Count: 25,740
Modeled Residue Count: 3,102
Deposited Residue Count: 3,240
Unique protein chains: 1

Macromolecules

Find similar proteins by:

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Reverse transcriptase domain-containing protein	A, B, C, D, E A, B, C, D, E, F	540	Enterobacteriaceae	Mutation(s): 0 Gene Names: BZ227_14395
UniProt
Find proteins for A0A628R156 (Salmonella muenchen) Explore A0A628R156 Go to UniProtKB: A0A628R156
Entity Groups
Sequence Clusters	30% Identity 50% Identity 70% Identity 90% Identity 95% Identity 100% Identity
UniProt Group	A0A628R156
Sequence Annotations Expand
Reference Sequence

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
T8T (Subject of Investigation/LOI) Query on T8T Download:Ideal Coordinates CCD File SDF format, chain AA [auth F] SDF format, chain G [auth A] SDF format, chain K [auth B] SDF format, chain S [auth D] SDF format, chain W [auth E] SDF format, chain O [auth C] MOL2 format, chain AA [auth F] MOL2 format, chain G [auth A] MOL2 format, chain K [auth B] MOL2 format, chain S [auth D] MOL2 format, chain W [auth E] MOL2 format, chain O [auth C] mmCIF format, chain AA [auth F] mmCIF format, chain G [auth A] mmCIF format, chain K [auth B] mmCIF format, chain S [auth D] mmCIF format, chain W [auth E] mmCIF format, chain O [auth C]	AA [auth F] G [auth A] K [auth B] O [auth C] S [auth D] AA [auth F], G [auth A], K [auth B], O [auth C], S [auth D], W [auth E]	2'-deoxyguanosine-5'-O-(1-thiotriphosphate) C₁₀ H₁₆ N₅ O₁₂ P₃ S IOCRYHATDKHWPM-KUFCIHQDSA-N		Interactions Focus chain AA [auth F] Focus chain G [auth A] Focus chain K [auth B] Focus chain O [auth C] Focus chain S [auth D] Focus chain W [auth E] Interactions & Density Focus chain AA [auth F] Focus chain G [auth A] Focus chain K [auth B] Focus chain O [auth C] Focus chain S [auth D] Focus chain W [auth E]
GMP (Subject of Investigation/LOI) Query on GMP Download:Ideal Coordinates CCD File SDF format, chain DA [auth F] SDF format, chain J [auth A] SDF format, chain N [auth B] SDF format, chain R [auth C] SDF format, chain V [auth D] SDF format, chain Z [auth E] MOL2 format, chain DA [auth F] MOL2 format, chain J [auth A] MOL2 format, chain N [auth B] MOL2 format, chain R [auth C] MOL2 format, chain V [auth D] MOL2 format, chain Z [auth E] mmCIF format, chain DA [auth F] mmCIF format, chain J [auth A] mmCIF format, chain N [auth B] mmCIF format, chain R [auth C] mmCIF format, chain V [auth D] mmCIF format, chain Z [auth E]	DA [auth F] J [auth A] N [auth B] R [auth C] V [auth D] DA [auth F], J [auth A], N [auth B], R [auth C], V [auth D], Z [auth E]	GUANOSINE C₁₀ H₁₃ N₅ O₅ NYHBQMYGNKIUIF-UUOKFMHZSA-N		Interactions Focus chain DA [auth F] Focus chain J [auth A] Focus chain N [auth B] Focus chain R [auth C] Focus chain V [auth D] Focus chain Z [auth E] Interactions & Density Focus chain DA [auth F] Focus chain J [auth A] Focus chain N [auth B] Focus chain R [auth C] Focus chain V [auth D] Focus chain Z [auth E]
MG (Subject of Investigation/LOI) Query on MG Download:Ideal Coordinates CCD File SDF format, chain BA [auth F] SDF format, chain CA [auth F] SDF format, chain H [auth A] SDF format, chain I [auth A] SDF format, chain L [auth B] SDF format, chain M [auth B] SDF format, chain P [auth C] SDF format, chain Q [auth C] SDF format, chain T [auth D] SDF format, chain U [auth D] SDF format, chain X [auth E] SDF format, chain Y [auth E] MOL2 format, chain BA [auth F] MOL2 format, chain CA [auth F] MOL2 format, chain H [auth A] MOL2 format, chain I [auth A] MOL2 format, chain L [auth B] MOL2 format, chain M [auth B] MOL2 format, chain P [auth C] MOL2 format, chain Q [auth C] MOL2 format, chain T [auth D] MOL2 format, chain U [auth D] MOL2 format, chain X [auth E] MOL2 format, chain Y [auth E] mmCIF format, chain BA [auth F] mmCIF format, chain CA [auth F] mmCIF format, chain H [auth A] mmCIF format, chain I [auth A] mmCIF format, chain L [auth B] mmCIF format, chain M [auth B] mmCIF format, chain P [auth C] mmCIF format, chain Q [auth C] mmCIF format, chain T [auth D] mmCIF format, chain U [auth D] mmCIF format, chain X [auth E] mmCIF format, chain Y [auth E]	BA [auth F] CA [auth F] H [auth A] I [auth A] L [auth B] BA [auth F], CA [auth F], H [auth A], I [auth A], L [auth B], M [auth B], P [auth C], Q [auth C], T [auth D], U [auth D], X [auth E], Y [auth E]	MAGNESIUM ION Mg JLVVSXFLKOJNIY-UHFFFAOYSA-N		Interactions Focus chain BA [auth F] Focus chain CA [auth F] Focus chain H [auth A] Focus chain I [auth A] Focus chain L [auth B] Focus chain M [auth B] Focus chain P [auth C] Focus chain Q [auth C] Focus chain T [auth D] Focus chain U [auth D] Focus chain X [auth E] Focus chain Y [auth E] Interactions & Density Focus chain BA [auth F] Focus chain CA [auth F] Focus chain H [auth A] Focus chain I [auth A] Focus chain L [auth B] Focus chain M [auth B] Focus chain P [auth C] Focus chain Q [auth C] Focus chain T [auth D] Focus chain U [auth D] Focus chain X [auth E] Focus chain Y [auth E]

Experimental Data & Validation

Experimental Data

Method: ELECTRON MICROSCOPY
Resolution: 2.76 Å
Aggregation State: PARTICLE
Reconstruction Method: SINGLE PARTICLE

EM Software:

Task	Software Package	Version
RECONSTRUCTION	cryoSPARC

Structure Validation

View Full Validation Report

View more in-depth experimental data

Entry History

& Funding Information

Deposition Data

Released Date: 2026-05-27

Deposition Author(s):

Funding Organization	Location	Grant Number
Not funded		--

Revision History (Full details and data files)

Version 1.0: 2026-05-27
Type: Initial release

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RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.