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2a55

Solution structure of the two N-terminal CCP modules of C4b-binding protein (C4BP) alpha-chain.

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

C4b-binding protein

Homo sapiens

UniProt P04003

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein monomer Monomer Protein 1 No other associated polymer Consistent with protein count

Other States of the Same Protein in the Database

Monomer
2a55

1 assemblies

Homodimer

None

Homotetramer

None

Other homooligomers
4b0f

1 assemblies

Heteromeric or nucleic-acid complex
5hyp 5hyt 5hyt 5hyu 5hzp 5i0q 8tcb 8tgt

8 assemblies

View Construct and Data Evidence
UniProt name C4BP_HUMAN
Isoform —
PDB entities 1
Chains and sequence ranges Author chain A； PDBConstruct 2–125； UniProt 49–172

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_id2a55
Deposition date deposition_date2005-06-30
Structure title titleSolution structure of the two N-terminal CCP modules of C4b-binding protein (C4BP) alpha-chain.
Keywords keywordsComplement, SCR, CCP Module, IMMUNE SYSTEM; IMMUNE SYSTEM
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.

2a55__assembly_1__model_1

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

Download this curve (.dat)

2a55__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.

2a55__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）23.77 Å
Rg (electron density)23.65 Å
Total Rg23.86 Å
Atom count2055
Residues133
Excluded volume18471 ų
Maximum q0.500 Å⁻¹
Assembly Model Structure unit Oligomeric description Status CRYSOL Actions
1 1 2a55__assembly_1__model_1 monomeric （1） Success 4.1.3-1-20251215 (887e7ef) View Download
1 2 2a55__assembly_1__model_2 monomeric （1） Success 4.1.3-1-20251215 (887e7ef) View Download
1 3 2a55__assembly_1__model_3 monomeric （1） Success 4.1.3-1-20251215 (887e7ef) View Download
1 4 2a55__assembly_1__model_4 monomeric （1） Success 4.1.3-1-20251215 (887e7ef) View Download
1 5 2a55__assembly_1__model_5 monomeric （1） Success 4.1.3-1-20251215 (887e7ef) View Download
1 6 2a55__assembly_1__model_6 monomeric （1） Success 4.1.3-1-20251215 (887e7ef) View Download
1 7 2a55__assembly_1__model_7 monomeric （1） Success 4.1.3-1-20251215 (887e7ef) View Download
1 8 2a55__assembly_1__model_8 monomeric （1） Success 4.1.3-1-20251215 (887e7ef) View Download
1 9 2a55__assembly_1__model_9 monomeric （1） Success 4.1.3-1-20251215 (887e7ef) View Download
1 10 2a55__assembly_1__model_10 monomeric （1） Success 4.1.3-1-20251215 (887e7ef) View Download
1 11 2a55__assembly_1__model_11 monomeric （1） Success 4.1.3-1-20251215 (887e7ef) View Download
1 12 2a55__assembly_1__model_12 monomeric （1） Success 4.1.3-1-20251215 (887e7ef) View Download
1 13 2a55__assembly_1__model_13 monomeric （1） Success 4.1.3-1-20251215 (887e7ef) View Download
1 14 2a55__assembly_1__model_14 monomeric （1） Success 4.1.3-1-20251215 (887e7ef) View Download
1 15 2a55__assembly_1__model_15 monomeric （1） Success 4.1.3-1-20251215 (887e7ef) View Download
1 16 2a55__assembly_1__model_16 monomeric （1） Success 4.1.3-1-20251215 (887e7ef) View Download
1 17 2a55__assembly_1__model_17 monomeric （1） Success 4.1.3-1-20251215 (887e7ef) View Download
1 18 2a55__assembly_1__model_18 monomeric （1） Success 4.1.3-1-20251215 (887e7ef) View Download
1 19 2a55__assembly_1__model_19 monomeric （1） Success 4.1.3-1-20251215 (887e7ef) View Download
1 20 2a55__assembly_1__model_20 monomeric （1） Success 4.1.3-1-20251215 (887e7ef) View Download
1 21 2a55__assembly_1__model_21 monomeric （1） Success 4.1.3-1-20251215 (887e7ef) View Download
1 22 2a55__assembly_1__model_22 monomeric （1） Success 4.1.3-1-20251215 (887e7ef) View Download
1 23 2a55__assembly_1__model_23 monomeric （1） Success 4.1.3-1-20251215 (887e7ef) View Download
1 24 2a55__assembly_1__model_24 monomeric （1） Success 4.1.3-1-20251215 (887e7ef) View Download
1 25 2a55__assembly_1__model_25 monomeric （1） Success 4.1.3-1-20251215 (887e7ef) View Download
1 26 2a55__assembly_1__model_26 monomeric （1） Success 4.1.3-1-20251215 (887e7ef) View Download
1 27 2a55__assembly_1__model_27 monomeric （1） Success 4.1.3-1-20251215 (887e7ef) View Download
1 28 2a55__assembly_1__model_28 monomeric （1） Success 4.1.3-1-20251215 (887e7ef) View Download
1 29 2a55__assembly_1__model_29 monomeric （1） Success 4.1.3-1-20251215 (887e7ef) View Download
1 30 2a55__assembly_1__model_30 monomeric （1） Success 4.1.3-1-20251215 (887e7ef) View Download
1 31 2a55__assembly_1__model_31 monomeric （1） Success 4.1.3-1-20251215 (887e7ef) View Download
1 32 2a55__assembly_1__model_32 monomeric （1） Success 4.1.3-1-20251215 (887e7ef) View Download
1 33 2a55__assembly_1__model_33 monomeric （1） Success 4.1.3-1-20251215 (887e7ef) View Download
1 34 2a55__assembly_1__model_34 monomeric （1） Success 4.1.3-1-20251215 (887e7ef) View Download
1 35 2a55__assembly_1__model_35 monomeric （1） Success 4.1.3-1-20251215 (887e7ef) View Download
1 36 2a55__assembly_1__model_36 monomeric （1） Success 4.1.3-1-20251215 (887e7ef) View Download
1 37 2a55__assembly_1__model_37 monomeric （1） Success 4.1.3-1-20251215 (887e7ef) View Download
1 38 2a55__assembly_1__model_38 monomeric （1） Success 4.1.3-1-20251215 (887e7ef) View Download
1 39 2a55__assembly_1__model_39 monomeric （1） Success 4.1.3-1-20251215 (887e7ef) View Download
1 40 2a55__assembly_1__model_40 monomeric （1） 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 (1)

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6. Fold Classification (SCOP + CATH) 2 domains

CATH v4.4 (2 domains)

Domain ID domain_id2a55A01
Class class2 — Mainly Beta
Architecture architecture10 — Ribbon
Topology topology70 — Complement Module; domain 1
Homologous superfamily homologous superfamily10 — Complement Module, domain 1
Domain ID domain_id2a55A02
Class class2 — Mainly Beta
Architecture architecture10 — Ribbon
Topology topology70 — Complement Module; domain 1
Homologous superfamily homologous superfamily10 — Complement Module, domain 1
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7. Citations (1)