3cu7

Human Complement Component 5

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

Complement C5

OrganismNot specified

UniProt P01031

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Other combination Monomer Protein 1 其他Polymer 1 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose × 1 2-acetamido-2-deoxy-beta-D-glucopyranose × 1 CADMIUM ION × 5 Consistent with protein count
2 Other combination Monomer Protein 1 其他Polymer 1 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose × 1 2-acetamido-2-deoxy-beta-D-glucopyranose × 1 CADMIUM ION × 4 Consistent with protein count
3 Other combination Homooligomer Protein 2 其他Polymer 2 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose × 2 2-acetamido-2-deoxy-beta-D-glucopyranose × 2 CADMIUM ION × 9 Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence
UniProt name CO5_HUMAN
Isoform —
PDB entities 1
Chains and sequence ranges Author chain A; PDBConstruct 1–1676; UniProt 1–1676 Author chain B; PDBConstruct 1–1676; UniProt 1–1676

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_id3cu7
Deposition date deposition_date2008-04-16
Structure title titleHuman Complement Component 5
Keywords keywords;MG domain, complement, inflammation, anaphylatoxin, Cleavage on pair of basic residues, Complement alternate pathway, Complement pathway, Cytolysis, Glycoprotein, Immune response, Inflammatory response, Innate immunity, Membrane attack complex, Secreted, Immune System ;; IMMUNE SYSTEM
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.

3cu7__assembly_1__model_1

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

Download this curve (.dat)

3cu7__assembly_1__model_1 | I(q)

10-2 10-1 106 107 108 q (1/Angstrom) I(q)
100 plotted points; both axes use logarithmic scales.

3cu7__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)41.88 Å
Rg (electron density)41.50 Å
Total Rg41.73 Å
Atom count12908
Residues1625
Excluded volume231560 ų
Maximum q0.500 Å⁻¹
Assembly Model Structure unit Oligomeric description Status CRYSOL Actions
1 1 3cu7__assembly_1__model_1 monomeric (1) Success 4.1.3-1-20251215 (887e7ef) View Download
2 1 3cu7__assembly_2__model_1 monomeric (1) Success 4.1.3-1-20251215 (887e7ef) View Download
3 1 3cu7__assembly_3__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 (4)

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6. Fold Classification (SCOP + CATH) 53 domains

SCOP 2.08 (29 domains)

Domain ID domain_idd3cu7a1
Class classb — All beta proteins
Fold Fold foldb.1 — Immunoglobulin-like beta-sandwich
Superfamily Superfamily superfamilyb.1.29 — Macroglobulin
Family Family familyb.1.29.2 — Complement C3 MG1-like
Domain ID domain_idd3cu7a2
Class classb — All beta proteins
Fold Fold foldb.1 — Immunoglobulin-like beta-sandwich
Superfamily Superfamily superfamilyb.1.29 — Macroglobulin
Family Family familyb.1.29.3 — Complement C3 MG2-like
Domain ID domain_idd3cu7a3
Class classb — All beta proteins
Fold Fold foldb.1 — Immunoglobulin-like beta-sandwich
Superfamily Superfamily superfamilyb.1.29 — Macroglobulin
Family Family familyb.1.29.4 — Complement C3 MG3-like
Domain ID domain_idd3cu7a4
Class classb — All beta proteins
Fold Fold foldb.1 — Immunoglobulin-like beta-sandwich
Superfamily Superfamily superfamilyb.1.29 — Macroglobulin
Family Family familyb.1.29.5 — Complement C3 MG4-like
Domain ID domain_idd3cu7a5
Class classb — All beta proteins
Fold Fold foldb.1 — Immunoglobulin-like beta-sandwich
Superfamily Superfamily superfamilyb.1.29 — Macroglobulin
Family Family familyb.1.29.6 — Complement C3 MG5-like
Domain ID domain_idd3cu7a6
Class classb — All beta proteins
Fold Fold foldb.1 — Immunoglobulin-like beta-sandwich
Superfamily Superfamily superfamilyb.1.29 — Macroglobulin
Family Family familyb.1.29.7 — Complement C3 MG6-like
Domain ID domain_idd3cu7a7
Class classb — All beta proteins
Fold Fold foldb.1 — Immunoglobulin-like beta-sandwich
Superfamily Superfamily superfamilyb.1.29 — Macroglobulin
Family Family familyb.1.29.8 — Complement C3 MG7-like
Domain ID domain_idd3cu7a8
Class classb — All beta proteins
Fold Fold foldb.1 — Immunoglobulin-like beta-sandwich
Superfamily Superfamily superfamilyb.1.29 — Macroglobulin
Family Family familyb.1.29.1 — Alpha-macroglobulin receptor domain
Domain ID domain_idd3cu7a9
Class classg — Small proteins
Fold Fold foldg.94 — Complement C3 linker domain-like
Superfamily Superfamily superfamilyg.94.1 — Complement C3 linker domain-like
Family Family familyg.94.1.1 — Complement C3 linker domain-like
Domain ID domain_idd3cu7aa
Class classa — All alpha proteins
Fold Fold folda.50 — Anaphylotoxins (complement system)
Superfamily Superfamily superfamilya.50.1 — Anaphylotoxins (complement system)
Family Family familya.50.1.1 — Anaphylotoxins (complement system)
Domain ID domain_idd3cu7ab
Class classj — Peptides
Fold Fold foldj.127 — Complement system alpha-prime linker
Superfamily Superfamily superfamilyj.127.1 — Complement system alpha-prime linker
Family Family familyj.127.1.1 — Complement system alpha-prime linker
Domain ID domain_idd3cu7ac
Class classj — Peptides
Fold Fold foldj.128 — Complement system anchor region
Superfamily Superfamily superfamilyj.128.1 — Complement system anchor region
Family Family familyj.128.1.1 — Complement system anchor region
Domain ID domain_idd3cu7ad
Class classb — All beta proteins
Fold Fold foldb.23 — CUB-like
Superfamily Superfamily superfamilyb.23.4 — Complement system CUB domain
Family Family familyb.23.4.1 — Complement system CUB domain
Domain ID domain_idd3cu7ae
Class classa — All alpha proteins
Fold Fold folda.102 — alpha/alpha toroid
Superfamily Superfamily superfamilya.102.4 — Terpenoid cyclases/Protein prenyltransferases
Family Family familya.102.4.4 — Complement components
Domain ID domain_idd3cu7af
Class classb — All beta proteins
Fold Fold foldb.40 — OB-fold
Superfamily Superfamily superfamilyb.40.3 — TIMP-like
Family Family familyb.40.3.3 — Netrin-like domain (NTR/C345C module)
Domain ID domain_idd3cu7b1
Class classb — All beta proteins
Fold Fold foldb.1 — Immunoglobulin-like beta-sandwich
Superfamily Superfamily superfamilyb.1.29 — Macroglobulin
Family Family familyb.1.29.2 — Complement C3 MG1-like
Domain ID domain_idd3cu7b2
Class classb — All beta proteins
Fold Fold foldb.1 — Immunoglobulin-like beta-sandwich
Superfamily Superfamily superfamilyb.1.29 — Macroglobulin
Family Family familyb.1.29.3 — Complement C3 MG2-like
Domain ID domain_idd3cu7b3
Class classb — All beta proteins
Fold Fold foldb.1 — Immunoglobulin-like beta-sandwich
Superfamily Superfamily superfamilyb.1.29 — Macroglobulin
Family Family familyb.1.29.4 — Complement C3 MG3-like
Domain ID domain_idd3cu7b4
Class classb — All beta proteins
Fold Fold foldb.1 — Immunoglobulin-like beta-sandwich
Superfamily Superfamily superfamilyb.1.29 — Macroglobulin
Family Family familyb.1.29.5 — Complement C3 MG4-like
Domain ID domain_idd3cu7b5
Class classb — All beta proteins
Fold Fold foldb.1 — Immunoglobulin-like beta-sandwich
Superfamily Superfamily superfamilyb.1.29 — Macroglobulin
Family Family familyb.1.29.6 — Complement C3 MG5-like
Domain ID domain_idd3cu7b6
Class classb — All beta proteins
Fold Fold foldb.1 — Immunoglobulin-like beta-sandwich
Superfamily Superfamily superfamilyb.1.29 — Macroglobulin
Family Family familyb.1.29.7 — Complement C3 MG6-like
Domain ID domain_idd3cu7b7
Class classb — All beta proteins
Fold Fold foldb.1 — Immunoglobulin-like beta-sandwich
Superfamily Superfamily superfamilyb.1.29 — Macroglobulin
Family Family familyb.1.29.8 — Complement C3 MG7-like
Domain ID domain_idd3cu7b8
Class classb — All beta proteins
Fold Fold foldb.1 — Immunoglobulin-like beta-sandwich
Superfamily Superfamily superfamilyb.1.29 — Macroglobulin
Family Family familyb.1.29.1 — Alpha-macroglobulin receptor domain
Domain ID domain_idd3cu7b9
Class classg — Small proteins
Fold Fold foldg.94 — Complement C3 linker domain-like
Superfamily Superfamily superfamilyg.94.1 — Complement C3 linker domain-like
Family Family familyg.94.1.1 — Complement C3 linker domain-like
Domain ID domain_idd3cu7ba
Class classa — All alpha proteins
Fold Fold folda.50 — Anaphylotoxins (complement system)
Superfamily Superfamily superfamilya.50.1 — Anaphylotoxins (complement system)
Family Family familya.50.1.1 — Anaphylotoxins (complement system)
Domain ID domain_idd3cu7bb
Class classj — Peptides
Fold Fold foldj.127 — Complement system alpha-prime linker
Superfamily Superfamily superfamilyj.127.1 — Complement system alpha-prime linker
Family Family familyj.127.1.1 — Complement system alpha-prime linker
Domain ID domain_idd3cu7bc
Class classj — Peptides
Fold Fold foldj.128 — Complement system anchor region
Superfamily Superfamily superfamilyj.128.1 — Complement system anchor region
Family Family familyj.128.1.1 — Complement system anchor region
Domain ID domain_idd3cu7bd
Class classb — All beta proteins
Fold Fold foldb.23 — CUB-like
Superfamily Superfamily superfamilyb.23.4 — Complement system CUB domain
Family Family familyb.23.4.1 — Complement system CUB domain
Domain ID domain_idd3cu7be
Class classa — All alpha proteins
Fold Fold folda.102 — alpha/alpha toroid
Superfamily Superfamily superfamilya.102.4 — Terpenoid cyclases/Protein prenyltransferases
Family Family familya.102.4.4 — Complement components

CATH v4.4 (24 domains)

Domain ID domain_id3cu7A01
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology40 — Immunoglobulin-like
Homologous superfamily homologous superfamily1930 — Macroglobulin (MG2) domain
Domain ID domain_id3cu7A02
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology40 — Immunoglobulin-like
Homologous superfamily homologous superfamily1930 — Macroglobulin (MG2) domain
Domain ID domain_id3cu7A03
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology40 — Immunoglobulin-like
Homologous superfamily homologous superfamily1940 —
Domain ID domain_id3cu7A04
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology40 — Immunoglobulin-like
Homologous superfamily homologous superfamily10 — Immunoglobulins
Domain ID domain_id3cu7A05
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology40 — Immunoglobulin-like
Homologous superfamily homologous superfamily1930 — Macroglobulin (MG2) domain
Domain ID domain_id3cu7A06
Class class2 — Mainly Beta
Architecture architecture20 — Single Sheet
Topology topology130 — S-adenosyl-L-methionine-dependent methyltransferases
Homologous superfamily homologous superfamily20 —
Domain ID domain_id3cu7A07
Class class6 — Special
Architecture architecture10 — Helix non-globular
Topology topology270 — Pheromone ER-1
Homologous superfamily homologous superfamily10 —
Domain ID domain_id3cu7A08
Class class1 — Mainly Alpha
Architecture architecture20 — Up-down Bundle
Topology topology91 — Influenza Virus Matrix Protein; Chain A, domain 1
Homologous superfamily homologous superfamily20 — Anaphylotoxins (complement system)
Domain ID domain_id3cu7A09
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology40 — Immunoglobulin-like
Homologous superfamily homologous superfamily10 — Immunoglobulins
Domain ID domain_id3cu7A10
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology120 — Jelly Rolls
Homologous superfamily homologous superfamily1540 —
Domain ID domain_id3cu7A11
Class class1 — Mainly Alpha
Architecture architecture50 — Alpha/alpha barrel
Topology topology10 — Glycosyltransferase
Homologous superfamily homologous superfamily20 —
Domain ID domain_id3cu7A12
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology40 — Immunoglobulin-like
Homologous superfamily homologous superfamily690 — Alpha-macroglobulin, receptor-binding domain
Domain ID domain_id3cu7A13
Class class2 — Mainly Beta
Architecture architecture40 — Beta Barrel
Topology topology50 — OB fold (Dihydrolipoamide Acetyltransferase, E2P)
Homologous superfamily homologous superfamily120 —
Domain ID domain_id3cu7B01
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology40 — Immunoglobulin-like
Homologous superfamily homologous superfamily1930 — Macroglobulin (MG2) domain
Domain ID domain_id3cu7B02
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology40 — Immunoglobulin-like
Homologous superfamily homologous superfamily1930 — Macroglobulin (MG2) domain
Domain ID domain_id3cu7B03
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology40 — Immunoglobulin-like
Homologous superfamily homologous superfamily1940 —
Domain ID domain_id3cu7B04
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology40 — Immunoglobulin-like
Homologous superfamily homologous superfamily10 — Immunoglobulins
Domain ID domain_id3cu7B05
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology40 — Immunoglobulin-like
Homologous superfamily homologous superfamily1930 — Macroglobulin (MG2) domain
Domain ID domain_id3cu7B06
Class class2 — Mainly Beta
Architecture architecture20 — Single Sheet
Topology topology130 — S-adenosyl-L-methionine-dependent methyltransferases
Homologous superfamily homologous superfamily20 —
Domain ID domain_id3cu7B07
Class class1 — Mainly Alpha
Architecture architecture20 — Up-down Bundle
Topology topology91 — Influenza Virus Matrix Protein; Chain A, domain 1
Homologous superfamily homologous superfamily20 — Anaphylotoxins (complement system)
Domain ID domain_id3cu7B08
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology40 — Immunoglobulin-like
Homologous superfamily homologous superfamily10 — Immunoglobulins
Domain ID domain_id3cu7B09
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology120 — Jelly Rolls
Homologous superfamily homologous superfamily1540 —
Domain ID domain_id3cu7B10
Class class1 — Mainly Alpha
Architecture architecture50 — Alpha/alpha barrel
Topology topology10 — Glycosyltransferase
Homologous superfamily homologous superfamily20 —
Domain ID domain_id3cu7B11
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology40 — Immunoglobulin-like
Homologous superfamily homologous superfamily690 — Alpha-macroglobulin, receptor-binding domain
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7. Citations (1)