1v2z

Crystal structure of the C-terminal domain of Thermosynechococcus elongatus BP-1 KaiA

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

circadian clock protein KaiA homolog

Thermosynechococcus elongatus

UniProt Q8RR35

State in the Current Structure

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

Other States of the Same Protein in the Database

View Construct and Data Evidence
UniProt name Q8RR35
Isoform —
PDB entities 1
Chains and sequence ranges Author chain A; PDBConstruct 2–111; UniProt 174–283

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_id1v2z
Deposition date deposition_date2003-10-20
Structure title titleCrystal structure of the C-terminal domain of Thermosynechococcus elongatus BP-1 KaiA
Keywords keywordsALL ALPHA, RIKEN Structural Genomics/Proteomics Initiative, RSGI, Structural Genomics, circadian clock protein; CIRCADIAN CLOCK 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.

1v2z__assembly_1__model_1

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

Download this curve (.dat)

1v2z__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.

1v2z__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)19.87 Å
Rg (electron density)18.67 Å
Total Rg19.75 Å
Atom count1756
Residues212
Excluded volume31602 ų
Maximum q0.500 Å⁻¹
Assembly Model Structure unit Oligomeric description Status CRYSOL Actions
1 1 1v2z__assembly_1__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 (2)

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6. Fold Classification (SCOP + CATH) 3 domains

SCOP 2.08 (2 domains)

Domain ID domain_idd1v2za1
Class classa — All alpha proteins
Fold Fold folda.186 — KaiA/RbsU domain
Superfamily Superfamily superfamilya.186.1 — KaiA/RbsU domain
Family Family familya.186.1.1 — Circadian clock protein KaiA, C-terminal domain
Domain ID domain_idd1v2za2
Class classl — Artifacts
Fold Fold foldl.1 — Tags
Superfamily Superfamily superfamilyl.1.1 — Tags
Family Family familyl.1.1.1 — Tags

CATH v4.4 (1 domains)

Domain ID domain_id1v2zA00
Class class1 — Mainly Alpha
Architecture architecture10 — Orthogonal Bundle
Topology topology1240 — Methyltransferase, Methionine Synthase (B12-binding Domains); Chain A, domain 1
Homologous superfamily homologous superfamily30 — KaiA/RbsU domain
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7. Citations (1)