9FQU | pdb_00009fqu

Cryo-EM structure of MmCAT1 bound with FrMLV-RBD in the arginine-bound inward-occluded state

• PDB DOI: https://doi.org/10.2210/pdb9FQU/pdb
• EM Map EMD-50669: EMDB EMDataResource

• Classification: MEMBRANE PROTEIN
• Organism(s): Mus musculus, Murine leukemia virus
• Expression System: Homo sapiens
• Mutation(s): No 


• Deposited: 2024-06-17 Released: 2025-07-02 
• Deposition Author(s): Ye, M., Zhou, D., Pike, A.C.W., Wang, S., Wang, D., Bakshi, S., Brooke, L., Williams, E., Elkins, J., Stuart, D.I., Sauer, D.B.
• Funding Organization(s): Other private

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 2.79 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Starting Models: experimental, in silico

Literature

Amino acid and viral binding by the high-affinity Cationic Amino acid Transporter 1 (CAT1) from Mus musculus

Ye, M., Liang, Z., Zhou, D., Pike, A.C.W., Wang, S., Wang, D., Bakshi, S., Brooke, L., Williams, E., Elkins, J., Kessler, B., Stuart, D.I., Sauer, D.B.

To be published.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B1 

Biological assembly 1 assigned by authors and generated by (software)

Biological Assembly Evidence: electron microscopy

Macromolecule Content 

• Total Structure Weight: 132.25 kDa 
• Atom Count: 6,059 
• Modeled Residue Count: 769 
• Deposited Residue Count: 1,178 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
High affinity cationic amino acid transporter 1,Green fluorescent protein	A	902	Mus musculus	Mutation(s): 0  Gene Names: Slc7a1, Atrc1, Rec-1, GFP
UniProt
Find proteins for P42212 (Aequorea victoria) Explore P42212  Go to UniProtKB:  P42212
Find proteins for Q09143 (Mus musculus) Explore Q09143  Go to UniProtKB:  Q09143
UniProt Groups	P42212Q09143
Glycosylation
Glycosylation Sites: 2		Go to GlyGen: Q09143-1

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Surface protein	B	276	Murine leukemia virus	Mutation(s): 0  Gene Names: env
UniProt
Find proteins for P03390 (Friend murine leukemia virus (isolate 57)) Explore P03390  Go to UniProtKB:  P03390
Glycosylation
Glycosylation Sites: 2

Oligosaccharides

Help

Entity ID: 3
Molecule	Chains	Length	2D Diagram	Glycosylation	3D Interactions
alpha-D-mannopyranose-(1-3)-beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-[alpha-L-fucopyranose-(1-6)]2-acetamido-2-deoxy-beta-D-glucopyranose	C [auth D]	5		N-Glycosylation

Entity ID: 4
Molecule	Chains	Length	2D Diagram	Glycosylation	3D Interactions
beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose	D [auth I]	3		N-Glycosylation

Entity ID: 5
Molecule	Chains	Length	2D Diagram	Glycosylation	3D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose	E [auth C]	2		N-Glycosylation

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
Y01 (Subject of Investigation/LOI)	G [auth A], H [auth A]	CHOLESTEROL HEMISUCCINATE C31 H50 O4 WLNARFZDISHUGS-MIXBDBMTSA-N
NAG (Subject of Investigation/LOI)	F [auth A]	2-acetamido-2-deoxy-beta-D-glucopyranose C8 H15 N O6 OVRNDRQMDRJTHS-FMDGEEDCSA-N
ARG	I [auth A]	ARGININE C6 H15 N4 O2 ODKSFYDXXFIFQN-BYPYZUCNSA-O

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 2.79 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

EM Software:

Task	Software Package	Version
RECONSTRUCTION	cryoSPARC
MODEL REFINEMENT	PHENIX

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2025-07-02 
Deposition Author(s): Ye, M., Zhou, D., Pike, A.C.W., Wang, S., Wang, D., Bakshi, S., Brooke, L., Williams, E., Elkins, J., Stuart, D.I., Sauer, D.B.

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Funding Organization	Location	Grant Number
Other private		--

Revision History  

• Version 1.0: 2025-07-02
  Type: Initial release