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3c18

Crystal structure of nucleotidyltransferase-like protein (ZP_00538802.1) from Exiguobacterium sibiricum 255-15 at 1.90 A resolution

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

Nucleotidyltransferase-like protein

Exiguobacterium sibiricum

UniProt Q41F96

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein homooligomer Homooligomer Protein 2 GLYCEROL × 4 CHLORIDE ION × 1 water × 2 Consistent with protein count
2 Protein homooligomer Homooligomer Protein 2 CHLORIDE ION × 4 water × 2 Consistent with protein count

Other States of the Same Protein in the Database

Monomer

None

Homodimer
3c18 3c18

2 assemblies

Homotetramer

None

Other homooligomers

None

Heteromeric or nucleic-acid complex

None

View Construct and Data Evidence
UniProt name Q41F96_9BACI
Isoform —
PDB entities 1
Chains and sequence ranges Author chain A； PDBConstruct 2–290； UniProt 1–289 Author chain B； PDBConstruct 2–290； UniProt 1–289 Author chain C； PDBConstruct 2–290； UniProt 1–289

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_id3c18
Deposition date deposition_date2008-01-22
Structure title titleCrystal structure of nucleotidyltransferase-like protein (ZP_00538802.1) from Exiguobacterium sibiricum 255-15 at 1.90 A resolution
Keywords keywords;ZP_00538802.1, nucleotidyltransferase-like protein, Structural Genomics, Joint Center for Structural Genomics, JCSG, Protein Structure Initiative, PSI-2, TRANSFERASE ;; TRANSFERASE
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.

3c18__assembly_1__model_1

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

Download this curve (.dat)

3c18__assembly_1__model_1 | I(q)

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

3c18__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）26.51 Å
Rg (electron density)25.45 Å
Total Rg26.34 Å
Atom count4786
Residues569
Excluded volume85477 ų
Maximum q0.500 Å⁻¹
Assembly Model Structure unit Oligomeric description Status CRYSOL Actions
1 1 3c18__assembly_1__model_1 dimeric （2） Success 4.1.3-1-20251215 (887e7ef) View Download
2 1 3c18__assembly_2__model_1 dimeric （2） 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 (4)

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6. Fold Classification (SCOP + CATH) 9 domains

CATH v4.4 (9 domains)

Domain ID domain_id3c18A01
Class class3 — Alpha Beta
Architecture architecture30 — 2-Layer Sandwich
Topology topology460 — Beta Polymerase; domain 2
Homologous superfamily homologous superfamily10 — Beta Polymerase, domain 2
Domain ID domain_id3c18A02
Class class1 — Mainly Alpha
Architecture architecture20 — Up-down Bundle
Topology topology120 — Four Helix Bundle (Hemerythrin (Met), subunit A)
Homologous superfamily homologous superfamily330 — Nucleotidyltransferases domain 2
Domain ID domain_id3c18A03
Class class1 — Mainly Alpha
Architecture architecture10 — Orthogonal Bundle
Topology topology10 — Arc Repressor Mutant, subunit A
Homologous superfamily homologous superfamily10 — Winged helix-like DNA-binding domain superfamily/Winged helix DNA-binding domain
Domain ID domain_id3c18B01
Class class3 — Alpha Beta
Architecture architecture30 — 2-Layer Sandwich
Topology topology460 — Beta Polymerase; domain 2
Homologous superfamily homologous superfamily10 — Beta Polymerase, domain 2
Domain ID domain_id3c18B02
Class class1 — Mainly Alpha
Architecture architecture20 — Up-down Bundle
Topology topology120 — Four Helix Bundle (Hemerythrin (Met), subunit A)
Homologous superfamily homologous superfamily330 — Nucleotidyltransferases domain 2
Domain ID domain_id3c18B03
Class class1 — Mainly Alpha
Architecture architecture10 — Orthogonal Bundle
Topology topology10 — Arc Repressor Mutant, subunit A
Homologous superfamily homologous superfamily10 — Winged helix-like DNA-binding domain superfamily/Winged helix DNA-binding domain
Domain ID domain_id3c18C01
Class class3 — Alpha Beta
Architecture architecture30 — 2-Layer Sandwich
Topology topology460 — Beta Polymerase; domain 2
Homologous superfamily homologous superfamily10 — Beta Polymerase, domain 2
Domain ID domain_id3c18C02
Class class1 — Mainly Alpha
Architecture architecture20 — Up-down Bundle
Topology topology120 — Four Helix Bundle (Hemerythrin (Met), subunit A)
Homologous superfamily homologous superfamily330 — Nucleotidyltransferases domain 2
Domain ID domain_id3c18C03
Class class1 — Mainly Alpha
Architecture architecture10 — Orthogonal Bundle
Topology topology10 — Arc Repressor Mutant, subunit A
Homologous superfamily homologous superfamily10 — Winged helix-like DNA-binding domain superfamily/Winged helix DNA-binding domain
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7. Citations (1)