6of7

Crystal structure of the CRY1-PER2 complex

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

Cryptochrome-1

Mus musculus

UniProt P97784

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein heterocomplex Heteromer Protein 2 Period circadian protein homolog 2 × 1 (O15055) Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence
UniProt name CRY1_MOUSE
Isoform —
PDB entities 1
Chains and sequence ranges Author chain A; PDBConstruct 1–491; UniProt 1–491

Period circadian protein homolog 2

Homo sapiens

UniProt O15055

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein heterocomplex Heteromer Protein 2 Cryptochrome-1 × 1 (P97784) Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence
UniProt name PER2_HUMAN
Isoform —
PDB entities 2
Chains and sequence ranges Author chain B; PDBConstruct 8–127; UniProt 1093–1212

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_id6of7
Deposition date deposition_date2019-03-28
Structure title titleCrystal structure of the CRY1-PER2 complex
Keywords keywordsCryptochrome-1, Period 2 complex, 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.

6of7__assembly_1__model_1

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

Download this curve (.dat)

6of7__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.

6of7__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)26.39 Å
Rg (electron density)25.15 Å
Total Rg26.15 Å
Atom count4424
Residues555
Excluded volume78715 ų
Maximum q0.500 Å⁻¹
Assembly Model Structure unit Oligomeric description Status CRYSOL Actions
1 1 6of7__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) 5 domains

SCOP 2.08 (2 domains)

Domain ID domain_idd6of7a1
Class classc — Alpha and beta proteins (a/b)
Fold Fold foldc.28 — Cryptochrome/photolyase, N-terminal domain
Superfamily Superfamily superfamilyc.28.1 — Cryptochrome/photolyase, N-terminal domain
Family Family familyc.28.1.1 — Cryptochrome/photolyase, N-terminal domain
Domain ID domain_idd6of7a2
Class classa — All alpha proteins
Fold Fold folda.99 — Cryptochrome/photolyase FAD-binding domain
Superfamily Superfamily superfamilya.99.1 — Cryptochrome/photolyase FAD-binding domain
Family Family familya.99.1.1 — Cryptochrome/photolyase FAD-binding domain

CATH v4.4 (3 domains)

Domain ID domain_id6of7A01
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology50 — Rossmann fold
Homologous superfamily homologous superfamily620 — HUPs
Domain ID domain_id6of7A02
Class class1 — Mainly Alpha
Architecture architecture25 — Alpha Horseshoe
Topology topology40 — Serine Threonine Protein Phosphatase 5, Tetratricopeptide repeat
Homologous superfamily homologous superfamily80 —
Domain ID domain_id6of7A03
Class class1 — Mainly Alpha
Architecture architecture10 — Orthogonal Bundle
Topology topology579 — DNA Cyclobutane Dipyrimidine Photolyase, subunit A; domain 3
Homologous superfamily homologous superfamily10 — DNA Cyclobutane Dipyrimidine Photolyase, subunit A, domain 3
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7. Citations (1)