9yrn

Cryo-EM structure of SARS-CoV-2 nsp10-nsp14 (E191A) in complex with T20P14-S complex, tetrameric form

Method: ELECTRON MICROSCOPY

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1. Protein Identity and Related Structures Protein Identity & Related Structures

Non-structural protein 10

Severe acute respiratory syndrome coronavirus 2

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein–RNA	Homooligomer	Protein 8 RNA 4	T20P14-S RNA × 2 P6 RNA × 2 ZINC ION × 20 MAGNESIUM ION × 6 ;[(2~{R},3~{R},4~{R},5~{R})-5-[2,4-bis(oxidanylidene)pyrimidin-1-yl]-4-fluoranyl-4-methyl-3-oxidanyl-oxolan-2-yl]methyl dihydrogen phosphate ; × 2	Consistent with all polymers

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	R1AB_SARS2
Isoform	—
PDB entities	1, 2
Chains and sequence ranges	Author chain A； PDBConstruct 1–139； UniProt 4254–4392 Author chain C； PDBConstruct 1–139； UniProt 4254–4392 Author chain G； PDBConstruct 1–139； UniProt 4254–4392 Author chain I； PDBConstruct 1–139； UniProt 4254–4392 Author chain B； PDBConstruct 1–527； UniProt 5926–6452 Author chain D； PDBConstruct 1–527； UniProt 5926–6452 Author chain H； PDBConstruct 1–527； UniProt 5926–6452 Author chain J； PDBConstruct 1–527； UniProt 5926–6452

The page prioritizes protein identity, the current assembly, associated components, oligomeric state and cross-PDB links. Chain mapping and sequence ranges are retained as data evidence. Internal IDs, import timestamps and assembly operation expressions are maintenance fields and are not shown here.

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2. Structure Basics 2. Structure Basics

Entry ID entry_id	9yrn
Deposition date deposition_date	2025-10-16
Structure title title	Cryo-EM structure of SARS-CoV-2 nsp10-nsp14 (E191A) in complex with T20P14-S complex, tetrameric form
Keywords keywords	;SARS-CoV-2, replication and transcription, mismatch, proofreading exoribonuclease, VIRAL PROTEIN, VIRAL PROTEIN-RNA complex, nucleoside analog ;; VIRAL PROTEIN/RNA
Experimental Method method	ELECTRON MICROSCOPY

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3. Official assembly/model SAXS Official SAXS Profiles

This page reads only the latest assembly calculations. Every curve maps to an explicit PDB entry, official biological assembly and coordinate model.

9yrn__assembly_1__model_1

Assembly 1 · Model 1 · CRYSOL 4.1.3-1-20251215 (887e7ef)

Download this curve (.dat)

9yrn__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

9yrn__assembly_1__model_1 | P(r) · Pending

P(r) will be calculated and displayed separately for the same assembly/model.

Rg（Guinier）	47.41 Å
Rg (electron density)	47.19 Å
Total Rg	47.57 Å
Atom count	21412
Residues	2628
Excluded volume	376880 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`9yrn__assembly_1__model_1`	12-meric （12）	Success	4.1.3-1-20251215 (887e7ef)	View Download

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4. Crystallography and Experiment 4. Crystallography & Experiment

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5. Entities and Polymers Entities & Polymers (7)

Entity 1 Entity 1 polymer

Description description	Non-structural protein 10
Molecular weight formula_weight	14802.9 kDa
Source method src_method	man
Copy count entity_count	4

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,C,G,I
Atom count atom_count	21412

AGNATEVPANSTVLSFCAFAVDAAKAYKDYLASGGQPITNCVKMLCTHTGTGQAITVTPEANMDQESFGGASCCLYCRCHIDHPNPKGFCDLKGKYVQIPTTCANDPVGFTLKNTVCTVCGMWKGYGCSCDQLREPMLQ

Source Source

Source organism organism	Severe acute respiratory syndrome coronavirus 2
NCBI taxonomy ID ncbi_taxonomy_id	2697049
Host organism host_organism	Escherichia coli

Entity 2 Entity 2 polymer

Description description	Proofreading exoribonuclease
Molecular weight formula_weight	59829.4 kDa
EC 编号 ec_number	3.1.13.-
Mutation mutation	E191A
Source method src_method	man
Copy count entity_count	4

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	B,D,H,J

AENVTGLFKDCSKVITGLHPTQAPTHLSVDTKFKTEGLCVDIPGIPKDMTYRRLISMMGFKMNYQVNGYPNMFITREEAIRHVRAWIGFDVEGCHATREAVGTNLPLQLGFSTGVNLVAVPTGYVDTPNNTDFSRVSAKPPPGDQFKHLIPLMYKGLPWNVVRIKIVQMLSDTLKNLSDRVVFVLWAHGFALTSMKYFVKIGPERTCCLCDRRATCFSTASDTYACWHHSIGFDYVYNPFMIDVQQWGFTGNLQSNHDLYCQVHGNAHVASCDAIMTRCLAVHECFVKRVDWTIEYPIIGDELKINAACRKVQHMVVKAALLADKFPVLHDIGNPKAIKCVPQADVEWKFYDAQPCSDKAYKIEELFYSYATHSDKFTDGVCLFWNCNVDRYPANSIVCRFDTRVLSNLNLPGCDGGSLYVNKHAFHTPAFDKSAFVNLKQLPFFYYSDSPCESHGKQVVSDIDYVPLKSATCITRCNLGGAVCRHHANEYRLYLDAYNMMISAGFSLWVYKQFDTYNLWNTFTRLQ

Source Source

Source organism organism	Severe acute respiratory syndrome coronavirus 2
NCBI taxonomy ID ncbi_taxonomy_id	2697049
Host organism host_organism	Escherichia coli

Entity 3 Entity 3 polymer

Description description	T20P14-S RNA
Molecular weight formula_weight	12187.3 kDa
Source method src_method	syn
Copy count entity_count	2

Polymer Polymer

Polymer type type	polyribonucleotide
Chain IDs strand_id	E,K

GGGACAGGGAUUUUAAUAGCUUCGGCUAUUAAAAUCCC

Entity 4 Entity 4 polymer

Description description	P6 RNA
Molecular weight formula_weight	1827.1 kDa
Source method src_method	syn
Copy count entity_count	2

Polymer Polymer

Polymer type type	polyribonucleotide
Chain IDs strand_id	F,L

GUCCCC

Entity 5 Entity 5 non-polymer

Description description	ZINC ION
Molecular weight formula_weight	65.4 kDa
Source method src_method	syn
Copy count entity_count	20

Entity 6 Entity 6 non-polymer

Description description	MAGNESIUM ION
Molecular weight formula_weight	24.3 kDa
Source method src_method	syn
Copy count entity_count	6

Entity 7 Entity 7 non-polymer

Description description	;[(2~{R},3~{R},4~{R},5~{R})-5-[2,4-bis(oxidanylidene)pyrimidin-1-yl]-4-fluoranyl-4-methyl-3-oxidanyl-oxolan-2-yl]methyl dihydrogen phosphate ;
Molecular weight formula_weight	340.2 kDa
Source method src_method	syn
Copy count entity_count	2

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Unit-cell length a length_a	1.000 Å
Unit-cell length b length_b	1.000 Å
Unit-cell length c length_c	1.000 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	90.00 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	—

Space group space_group	P 1
Space-group number int_tables_number	1
Crystal system crystal_system	—

Resolution resolution	2.40 Å
Resolution测定Method resolution_method	—
颗粒数 num_particles	171020

Cryo-EM structure of SARS-CoV-2 nsp10-nsp14 (E191A) in complex with T20P14-S complex, tetrameric form

1. Protein Identity and Related Structures Protein Identity & Related Structures

Non-structural protein 10

State in the Current Structure

Other States of the Same Protein in the Database

2. Structure Basics 2. Structure Basics

3. Official assembly/model SAXS Official SAXS Profiles

9yrn__assembly_1__model_1

9yrn__assembly_1__model_1 | I(q)

9yrn__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

冷冻电镜 EM 3D

5. Entities and Polymers Entities & Polymers (7)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 polymer

Polymer Polymer

Source Source

Entity 3 Entity 3 polymer

Polymer Polymer

Entity 4 Entity 4 polymer

Polymer Polymer

Entity 5 Entity 5 non-polymer

Entity 6 Entity 6 non-polymer

Entity 7 Entity 7 non-polymer

7. Citations (1)

Cryo-EM structure of SARS-CoV-2 nsp10-nsp14 (E191A) in complex with T20P14-S complex, tetrameric form

1. Protein Identity and Related Structures Protein Identity & Related Structures

Non-structural protein 10

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

2. Structure Basics 2. Structure Basics

3. Official assembly/model SAXS Official SAXS Profiles

9yrn__assembly_1__model_1

9yrn__assembly_1__model_1 | I(q)

9yrn__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

冷冻电镜 EM 3D

5. Entities and Polymers Entities & Polymers (7)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 polymer

Polymer Polymer

Source Source

Entity 3 Entity 3 polymer

Polymer Polymer

Entity 4 Entity 4 polymer

Polymer Polymer

Entity 5 Entity 5 non-polymer

Entity 6 Entity 6 non-polymer

Entity 7 Entity 7 non-polymer

7. Citations (1)