6M23

Overall structure of KCC2

• PDB DOI: https://doi.org/10.2210/pdb6M23/pdb
• EM Map EMD-30061: EMDB EMDataResource

• Classification: MEMBRANE PROTEIN
• Organism(s): Homo sapiens
• Expression System: Homo sapiens
• Mutation(s): No 
• Membrane Protein: Yes  OPMPDBTMMemProtMDmpstruc


• Deposited: 2020-02-26 Released: 2020-11-04 
• Deposition Author(s): Chi, X.M., Li, X.R., Chen, Y., Zhang, Y.Y., Su, Q., Zhou, Q.
• Funding Organization(s): National Natural Science Foundation of China (NSFC)

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 3.20 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Literature

Cryo-EM structures of the full-length human KCC2 and KCC3 cation-chloride cotransporters.

Chi, X., Li, X., Chen, Y., Zhang, Y., Su, Q., Zhou, Q.

(2021) Cell Res 31: 482-484

• PubMed: 33199848 
• DOI: https://doi.org/10.1038/s41422-020-00437-x
• Primary Citation of Related Structures:  
  6M1Y, 6M22, 6M23

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Organizational Affiliation: 

Westlake Laboratory of Life Sciences and Biomedicine, Key Laboratory of Structural Biology of Zhejiang Province, School of Life Sciences, Westlake University, Hangzhou, Zhejiang, 310024, China.

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: microscopy

Macromolecule Content

• Total Structure Weight: 253.73 kDa 
• Atom Count: 14,744 
• Modelled Residue Count: 1,872 
• Deposited Residue Count: 2,258 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Solute carrier family 12 member 5	A, B	1,129	Homo sapiens	Mutation(s): 0  Gene Names: KCC2 Membrane Entity: Yes
UniProt & NIH Common Fund Data Resources
Find proteins for Q9H2X9 (Homo sapiens) Explore Q9H2X9  Go to UniProtKB:  Q9H2X9
PHAROS:  Q9H2X9 GTEx:  ENSG00000124140
Glycosylation
Glycosylation Sites: 4		Go to GlyGen: Q9H2X9-1

Oligosaccharides

Help

Entity ID: 2
Molecule	Chains	Length	2D Diagram	Glycosylation	3D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose	C, D, E, F, G, H	2		N-Glycosylation
Glycosylation Resources
GlyTouCan:  G42666HT GlyCosmos:  G42666HT GlyGen:  G42666HT

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
NAG	K [auth A], N [auth B]	2-acetamido-2-deoxy-beta-D-glucopyranose C8 H15 N O6 OVRNDRQMDRJTHS-FMDGEEDCSA-N
K	I [auth A], L [auth B]	POTASSIUM ION K NPYPAHLBTDXSSS-UHFFFAOYSA-N
CL	J [auth A], M [auth B]	CHLORIDE ION Cl VEXZGXHMUGYJMC-UHFFFAOYSA-M

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
TPO	A, B	L-PEPTIDE LINKING	C4 H10 N O6 P		THR

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 3.20 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

EM Software:

Task	Software Package	Version
RECONSTRUCTION	RELION	3.0.6

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2020-11-04 
Deposition Author(s): Chi, X.M., Li, X.R., Chen, Y., Zhang, Y.Y., Su, Q., Zhou, Q.

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Funding Organization	Location	Grant Number
National Natural Science Foundation of China (NSFC)	China	31971123
National Natural Science Foundation of China (NSFC)	China	81920108015
National Natural Science Foundation of China (NSFC)	China	31930059

Revision History  

• Version 1.0: 2020-11-04
  Type: Initial release
  
• Version 1.1: 2021-05-19
  Changes: Database references
• Version 1.2: 2024-11-13
  Changes: Data collection, Database references, Structure summary