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9c9l

Cryo-EM structure of the C1q A, B-crt, C peptide assembly narrow region

Method: ELECTRON MICROSCOPY
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1. Protein Identity and Related Structures Protein Identity & Related Structures

Peptide from Complement C1q subcomponent subunit B

OrganismNot specified

UniProt P02746

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein heterocomplex Heteromer Protein 18 Peptide from Complement C1q subcomponent subunit A × 6 （P02745） Peptide from Complement C1q subcomponent subunit C × 6 （P02747） 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
1pk6 2jg8 2jg8 2jg9 2jg9 2wnu 2wnu 2wnv 2wnv 5hkj 5hzf 6fcz

16 assemblies; showing the first 12

View Construct and Data Evidence
UniProt name C1QB_HUMAN
Isoform —
PDB entities 1
Chains and sequence ranges Author chain A； PDBConstruct 1–13； UniProt 34–46 Author chain D； PDBConstruct 1–13； UniProt 34–46 Author chain E； PDBConstruct 1–13； UniProt 34–46 Author chain F； PDBConstruct 1–13； UniProt 34–46 Author chain G； PDBConstruct 1–13； UniProt 34–46 Author chain H； PDBConstruct 1–13； UniProt 34–46

Peptide from Complement C1q subcomponent subunit A

OrganismNot specified

UniProt P02745

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein heterocomplex Heteromer Protein 18 Peptide from Complement C1q subcomponent subunit B × 6 （P02746） Peptide from Complement C1q subcomponent subunit C × 6 （P02747） 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
1pk6 2jg8 2jg8 2jg9 2jg9 2wnu 2wnu 2wnv 2wnv 5hkj 5hzf 6fcz

16 assemblies; showing the first 12

View Construct and Data Evidence
UniProt name C1QA_HUMAN
Isoform —
PDB entities 2
Chains and sequence ranges Author chain B； PDBConstruct 1–13； UniProt 28–40 Author chain I； PDBConstruct 1–13； UniProt 28–40 Author chain J； PDBConstruct 1–13； UniProt 28–40 Author chain K； PDBConstruct 1–13； UniProt 28–40 Author chain L； PDBConstruct 1–13； UniProt 28–40 Author chain M； PDBConstruct 1–13； UniProt 28–40

Peptide from Complement C1q subcomponent subunit C

OrganismNot specified

UniProt P02747

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein heterocomplex Heteromer Protein 18 Peptide from Complement C1q subcomponent subunit B × 6 （P02746） Peptide from Complement C1q subcomponent subunit A × 6 （P02745） 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
1pk6 2jg8 2jg8 2jg9 2jg9 2wnu 2wnu 2wnv 2wnv 5hkj 5hzf 6fcz

16 assemblies; showing the first 12

View Construct and Data Evidence
UniProt name C1QC_HUMAN
Isoform —
PDB entities 3
Chains and sequence ranges Author chain C； PDBConstruct 1–14； UniProt 34–47 Author chain N； PDBConstruct 1–14； UniProt 34–47 Author chain O； PDBConstruct 1–14； UniProt 34–47 Author chain P； PDBConstruct 1–14； UniProt 34–47 Author chain Q； PDBConstruct 1–14； UniProt 34–47 Author chain R； PDBConstruct 1–14； UniProt 34–47

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_id9c9l
Deposition date deposition_date2024-06-14
Structure title titleCryo-EM structure of the C1q A, B-crt, C peptide assembly narrow region
Keywords keywordsC1q, complement, collagen, triple helix, IMMUNE SYSTEM; IMMUNE SYSTEM
Experimental Method methodELECTRON MICROSCOPY
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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.

9c9l__assembly_1__model_1

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

Download this curve (.dat)

9c9l__assembly_1__model_1 | I(q)

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

9c9l__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）18.73 Å
Rg (electron density)17.79 Å
Total Rg18.90 Å
Atom count1584
Residues186
Excluded volume28413 ų
Maximum q0.500 Å⁻¹
Assembly Model Structure unit Oligomeric description Status CRYSOL Actions
1 1 9c9l__assembly_1__model_1 octadecameric （18） 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 (3)

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7. Citations (1)