3m1m

Crystal structure of the primase-polymerase from Sulfolobus islandicus

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

ORF904

Sulfolobus islandicus

UniProt Q54324

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein monomer Monomer Protein 1 ZINC ION × 1 GLYCEROL × 1 SULFATE ION × 1 water × 1 Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence
UniProt name Q54324_SULIS
Isoform —
PDB entities 1
Chains and sequence ranges Author chain A; PDBConstruct 1–335; UniProt 36–370

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_id3m1m
Deposition date deposition_date2010-03-05
Structure title titleCrystal structure of the primase-polymerase from Sulfolobus islandicus
Keywords keywordsprimase, polymerase, Replication; REPLICATION
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.

3m1m__assembly_1__model_1

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

Download this curve (.dat)

3m1m__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.

3m1m__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)22.45 Å
Rg (electron density)21.26 Å
Total Rg22.27 Å
Atom count2628
Residues320
Excluded volume47273 ų
Maximum q0.500 Å⁻¹
Assembly Model Structure unit Oligomeric description Status CRYSOL Actions
1 1 3m1m__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) 3 domains

CATH v4.4 (3 domains)

Domain ID domain_id3m1mA01
Class class3 — Alpha Beta
Architecture architecture30 — 2-Layer Sandwich
Topology topology720 — Signal recognition particle alu RNA binding heterodimer, srp9/1
Homologous superfamily homologous superfamily160 — Bifunctional DNA primase/polymerase, N-terminal
Domain ID domain_id3m1mA02
Class class3 — Alpha Beta
Architecture architecture30 — 2-Layer Sandwich
Topology topology2250 — Prim-pol fold
Homologous superfamily homologous superfamily10 — Bifunctional DNA primase/polymerase domain
Domain ID domain_id3m1mA03
Class class1 — Mainly Alpha
Architecture architecture10 — Orthogonal Bundle
Topology topology1240 — Methyltransferase, Methionine Synthase (B12-binding Domains); Chain A, domain 1
Homologous superfamily homologous superfamily50 —
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7. Citations (1)