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1k3q

NMR structure of the FHA1 Domain of Rad53 in Complex with a Rad9-derived Phosphothreonine (at T192) Peptide

Method: SOLUTION NMR
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1. Protein Identity and Related Structures Protein Identity & Related Structures

Protein Kinase SPK1

Saccharomyces cerevisiae

UniProt P22216

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein heterocomplex Heteromer Protein 2 DNA repair protein Rad9 × 1 （P14737） Consistent with protein count

Other States of the Same Protein in the Database

Monomer
1dmz 1fhq 1g3g 1j4o 1k3j 1qu5 5xzv 5xzv 5xzw 5xzw

10 assemblies

Homodimer
2jqi 4pdp 4pdp 4pds 4pds 5xzw

6 assemblies

Homotetramer

None

Other homooligomers

None

Heteromeric or nucleic-acid complex
1fhr 1g6g 1j4k 1j4l 1j4p 1j4q 1k2m 1k2n 1k3n 1k3q 2a0t 2jql

23 assemblies; showing the first 12

View Construct and Data Evidence
UniProt name RAD53_YEAST
Isoform —
PDB entities 1
Chains and sequence ranges Author chain A； PDBConstruct 1–151； UniProt 14–164

DNA repair protein Rad9

OrganismNot specified

UniProt P14737

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein heterocomplex Heteromer Protein 2 Protein Kinase SPK1 × 1 （P22216） Consistent with protein count

Other States of the Same Protein in the Database

Monomer

None

Homodimer

None

Homotetramer

None

Other homooligomers

None

Heteromeric or nucleic-acid complex
1fhr 1j4k 1j4l 1j4p 1j4q 1k2m 1k2n 1k3n 1k3q 2ff4 2ff4 2ff4

12 assemblies

View Construct and Data Evidence
UniProt name RAD9_YEAST
Isoform —
PDB entities 2
Chains and sequence ranges Author chain B； PDBConstruct 1–13； UniProt 188–200

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_id1k3q
Deposition date deposition_date2001-10-03
Structure title titleNMR structure of the FHA1 Domain of Rad53 in Complex with a Rad9-derived Phosphothreonine (at T192) Peptide
Keywords keywordsFHA domain, Rad53, Rad9, phosphothreonine, phosphoprotein, TRANSFERASE-CELL CYCLE COMPLEX; TRANSFERASE/CELL CYCLE
Experimental Method methodSOLUTION NMR
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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.

1k3q__assembly_1__model_7

Assembly 1 · Model 7 · CRYSOL 4.1.3-1-20251215 (887e7ef)

Download this curve (.dat)

1k3q__assembly_1__model_7 | I(q)

10-2 10-1 105 106 q (1/Angstrom) I(q)
100 plotted points; both axes use logarithmic scales.

1k3q__assembly_1__model_7 | 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）19.46 Å
Rg (electron density)18.61 Å
Total Rg19.57 Å
Atom count2619
Residues163
Excluded volume23161 ų
Maximum q0.500 Å⁻¹
Assembly Model Structure unit Oligomeric description Status CRYSOL Actions
1 1 1k3q__assembly_1__model_1 dimeric （2） Success 4.1.3-1-20251215 (887e7ef) View Download
1 2 1k3q__assembly_1__model_2 dimeric （2） Success 4.1.3-1-20251215 (887e7ef) View Download
1 3 1k3q__assembly_1__model_3 dimeric （2） Success 4.1.3-1-20251215 (887e7ef) View Download
1 4 1k3q__assembly_1__model_4 dimeric （2） Success 4.1.3-1-20251215 (887e7ef) View Download
1 5 1k3q__assembly_1__model_5 dimeric （2） Success 4.1.3-1-20251215 (887e7ef) View Download
1 6 1k3q__assembly_1__model_6 dimeric （2） Success 4.1.3-1-20251215 (887e7ef) View Download
1 7 1k3q__assembly_1__model_7 dimeric （2） Success 4.1.3-1-20251215 (887e7ef) View Download
1 8 1k3q__assembly_1__model_8 dimeric （2） Success 4.1.3-1-20251215 (887e7ef) View Download
1 9 1k3q__assembly_1__model_9 dimeric （2） Success 4.1.3-1-20251215 (887e7ef) View Download
1 10 1k3q__assembly_1__model_10 dimeric （2） Success 4.1.3-1-20251215 (887e7ef) View Download
1 11 1k3q__assembly_1__model_11 dimeric （2） Success 4.1.3-1-20251215 (887e7ef) View Download
1 12 1k3q__assembly_1__model_12 dimeric （2） Success 4.1.3-1-20251215 (887e7ef) View Download
1 13 1k3q__assembly_1__model_13 dimeric （2） Success 4.1.3-1-20251215 (887e7ef) View Download
1 14 1k3q__assembly_1__model_14 dimeric （2） Success 4.1.3-1-20251215 (887e7ef) View Download
1 15 1k3q__assembly_1__model_15 dimeric （2） Success 4.1.3-1-20251215 (887e7ef) View Download
1 16 1k3q__assembly_1__model_16 dimeric （2） Success 4.1.3-1-20251215 (887e7ef) View Download
1 17 1k3q__assembly_1__model_17 dimeric （2） Success 4.1.3-1-20251215 (887e7ef) View Download
1 18 1k3q__assembly_1__model_18 dimeric （2） Success 4.1.3-1-20251215 (887e7ef) View Download
1 19 1k3q__assembly_1__model_19 dimeric （2） Success 4.1.3-1-20251215 (887e7ef) View Download
1 20 1k3q__assembly_1__model_20 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) 2 domains

SCOP 2.08 (1 domains)

Domain ID domain_idd1k3qa_
Class classb — All beta proteins
Fold Fold foldb.26 — SMAD/FHA domain
Superfamily Superfamily superfamilyb.26.1 — SMAD/FHA domain
Family Family familyb.26.1.2 — FHA domain

CATH v4.4 (1 domains)

Domain ID domain_id1k3qA00
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology200 — Tumour Suppressor Smad4
Homologous superfamily homologous superfamily20 —
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7. Citations (2)