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1w9h

The Structure of a Piwi protein from Archaeoglobus fulgidus.

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

HYPOTHETICAL PROTEIN AF1318

ARCHAEOGLOBUS FULGIDUS

UniProt O28951

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein monomer Monomer Protein 1 CADMIUM ION × 2 NICKEL (II) ION × 5 CHLORIDE ION × 4 water × 1 Consistent with protein count

Other States of the Same Protein in the Database

Monomer
1w9h

1 assemblies

Homodimer

None

Homotetramer

None

Other homooligomers

None

Heteromeric or nucleic-acid complex
1ytu 1ytu 2bgg 2bgg 2w42 2w42 6t5t 6tuo 8ok9

9 assemblies

View Construct and Data Evidence
UniProt name O28951
Isoform —
PDB entities 1
Chains and sequence ranges Author chain A； PDBConstruct 1–427； UniProt 1–427

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_id1w9h
Deposition date deposition_date2004-10-13
Structure title titleThe Structure of a Piwi protein from Archaeoglobus fulgidus.
Keywords keywordsARGONAUTE, PIWI DOMAIN, RNAI, RISC, NUCLEAR PROTEIN; NUCLEAR PROTEIN
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.

1w9h__assembly_1__model_1

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

Download this curve (.dat)

1w9h__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.

1w9h__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）23.10 Å
Rg (electron density)21.80 Å
Total Rg22.85 Å
Atom count3244
Residues398
Excluded volume58547 ų
Maximum q0.500 Å⁻¹
Assembly Model Structure unit Oligomeric description Status CRYSOL Actions
1 1 1w9h__assembly_1__model_1 monomeric （1） 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 (5)

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6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

Domain ID domain_idd1w9ha2
Class classc — Alpha and beta proteins (a/b)
Fold Fold foldc.44 — Phosphotyrosine protein phosphatases I-like
Superfamily Superfamily superfamilyc.44.3 — PIWI domain N-terminal-like
Family Family familyc.44.3.1 — PIWI domain N-terminal
Domain ID domain_idd1w9ha3
Class classc — Alpha and beta proteins (a/b)
Fold Fold foldc.55 — Ribonuclease H-like motif
Superfamily Superfamily superfamilyc.55.3 — Ribonuclease H-like
Family Family familyc.55.3.15 — PIWI domain C-terminal

CATH v4.4 (2 domains)

Domain ID domain_id1w9hA01
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology50 — Rossmann fold
Homologous superfamily homologous superfamily2300 — Response regulator
Domain ID domain_id1w9hA02
Class class3 — Alpha Beta
Architecture architecture30 — 2-Layer Sandwich
Topology topology420 — Nucleotidyltransferase; domain 5
Homologous superfamily homologous superfamily10 — Ribonuclease H-like superfamily/Ribonuclease H
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7. Citations (1)