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1rpu

Crystal Structure of CIRV p19 bound to siRNA

Method: X-RAY DIFFRACTION
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1. Protein Identity and Related Structures Protein Identity & Related Structures

19 kDa protein

Carnation Italian ringspot virus

UniProt Q66104

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein–RNA Homooligomer Protein 2 RNA 2 5'-R(P*CP*GP*UP*AP*CP*GP*CP*GP*UP*CP*AP*CP*GP*CP*GP*UP*AP*CP*GP*UP*U)-3' × 2 water × 4 Consistent with all polymers

Other States of the Same Protein in the Database

Monomer

None

Homodimer

None

Homotetramer

None

Other homooligomers

None

Heteromeric or nucleic-acid complex
1rpu 6bjg 6bjh 6bjv

4 assemblies

View Construct and Data Evidence
UniProt name VP19_CIRV
Isoform —
PDB entities 2
Chains and sequence ranges Author chain A； PDBConstruct 1–172； UniProt 1–172 Author chain B； PDBConstruct 1–172； UniProt 1–172

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_id1rpu
Deposition date deposition_date2003-12-03
Structure title titleCrystal Structure of CIRV p19 bound to siRNA
Keywords keywordsRNAi, PROTEIN-RNA COMPLEX, RNA DOUBLE HELIX, RNA LENGTH RECOGNITION, RNA Binding Protein-RNA COMPLEX; RNA Binding Protein/RNA
Experimental Method methodX-RAY DIFFRACTION
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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.

1rpu__assembly_1__model_1

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

Download this curve (.dat)

1rpu__assembly_1__model_1 | I(q)

10-2 10-1 105 106 107 q (1/Angstrom) I(q)
100 plotted points; both axes use logarithmic scales.

1rpu__assembly_1__model_1 | P(r) · Pending

The new assembly/model P(r) has not been calculated yet This placeholder does not display legacy data r (Angstrom) P(r)
P(r) will be calculated and displayed separately for the same assembly/model.
Rg（Guinier）22.21 Å
Rg (electron density)21.30 Å
Total Rg22.04 Å
Atom count3053
Residues316
Excluded volume50652 ų
Maximum q0.500 Å⁻¹
Assembly Model Structure unit Oligomeric description Status CRYSOL Actions
1 1 1rpu__assembly_1__model_1 tetrameric （4） 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 (3)

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6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

Domain ID domain_idd1rpua_
Class classd — Alpha and beta proteins (a+b)
Fold Fold foldd.255 — Tombusvirus P19 core protein, VP19
Superfamily Superfamily superfamilyd.255.1 — Tombusvirus P19 core protein, VP19
Family Family familyd.255.1.1 — Tombusvirus P19 core protein, VP19
Domain ID domain_idd1rpub_
Class classd — Alpha and beta proteins (a+b)
Fold Fold foldd.255 — Tombusvirus P19 core protein, VP19
Superfamily Superfamily superfamilyd.255.1 — Tombusvirus P19 core protein, VP19
Family Family familyd.255.1.1 — Tombusvirus P19 core protein, VP19

CATH v4.4 (2 domains)

Domain ID domain_id1rpuA00
Class class3 — Alpha Beta
Architecture architecture30 — 2-Layer Sandwich
Topology topology390 — Enolase-like; domain 1
Homologous superfamily homologous superfamily180 — RNA silencing suppressor P19
Domain ID domain_id1rpuB00
Class class3 — Alpha Beta
Architecture architecture30 — 2-Layer Sandwich
Topology topology390 — Enolase-like; domain 1
Homologous superfamily homologous superfamily180 — RNA silencing suppressor P19
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7. Citations (1)