Biological Assembly 1  

 3D View: Structure | Ligand Interaction

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 12-mer - A10B1C1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 498.25 kDa 
• Atom Count: 22499 
• Residue Count: 2869 
• Unique protein chains: 3

6KXS

Cryo-EM structure of human IgM-Fc in complex with the J chain and the ectodomain of pIgR

• DOI: 10.2210/pdb6KXS/pdb
• EMDataResource: EMD-0782

• Classification: IMMUNE SYSTEM
• Organism(s): Homo sapiens
• Expression System: Homo sapiens
• Mutation(s): No 


• Deposited: 2019-09-12 Released: 2020-02-05 
• Deposition Author(s): Li, Y., Wang, G., Xiao, J.
• Funding Organization(s): National Science Foundation (NSF, China)

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 3.40 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Literature

Structural basis for the assembly of secretory polymeric immunoglobulins.

Li, Y., Wang, G., Xiao, J.

(2020) Science 

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Immunoglobulin heavy constant mu	A,  B,  C,  D,  E,  F,  G,  H,  K,  L	383	Homo sapiens	Mutation(s): 0  Gene Names: IGHM
Find proteins for P01871 (Homo sapiens) Explore P01871  Go to UniProtKB:  P01871
NIH Common Fund Data Resources
PHAROS:  P01871 GTEx:  ENSG00000211899

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Immunoglobulin J chain	J	136	Homo sapiens	Mutation(s): 0  Gene Names: JCHAIN, IGCJ, IGJ
Find proteins for P01591 (Homo sapiens) Explore P01591  Go to UniProtKB:  P01591
NIH Common Fund Data Resources
PHAROS:  P01591 GTEx:  ENSG00000132465

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
Polymeric immunoglobulin receptor	P	555	Homo sapiens	Mutation(s): 0  Gene Names: PIGR
Find proteins for P01833 (Homo sapiens) Explore P01833  Go to UniProtKB:  P01833
NIH Common Fund Data Resources
PHAROS:  P01833 GTEx:  ENSG00000162896

Oligosaccharides

Help

Entity ID: 4
Molecule	Chains	Chain Length	2D Diagram	Glycosylation
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose	I	2		N-Glycosylation

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
NAG	A, B, C, D, E, F, G, H, K, L	2-acetamido-2-deoxy-beta-D-glucopyranose C8 H15 N O6 OVRNDRQMDRJTHS-FMDGEEDCSA-N

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 3.40 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Structure Validation

Entry History & Funding Information

Deposition Data

• Deposited Date: 2019-09-12 
• Released Date: 2020-02-05 
Deposition Author(s): Li, Y., Wang, G., Xiao, J.

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Funding Organization	Location	Grant Number
National Science Foundation (NSF, China)	China	--

Revision History 

• Version 1.0: 2020-02-05
  Type: Initial release
  
• Version 2.0: 2020-07-29
  Type: Remediation
  Reason: Carbohydrate remediation
  Changes: Advisory, Atomic model, Data collection, Derived calculations, Structure summary