9ZXC | pdb_00009zxc

Structure of AT118-R nanobody in complex with the angiotensin II type I receptor bound to losartan

• PDB DOI: https://doi.org/10.2210/pdb9ZXC/pdb
• EM Map EMD-74919: EMDB EMDataResource

• Classification: MEMBRANE PROTEIN
• Organism(s): synthetic construct, Homo sapiens, Escherichia coli
• Expression System: Homo sapiens
• Mutation(s): Yes 


• Deposited: 2026-01-03 Released: 2026-07-29 
• Deposition Author(s): Skiba, M.A., Gilman, M.S.A., Kruse, A.C.
• Funding Organization(s): National Institutes of Health/Eunice Kennedy Shriver National Institute of Child Health & Human Development (NIH/NICHD), National Institutes of Health/National Cancer Institute (NIH/NCI), National Institutes of Health/National Heart, Lung, and Blood Institute (NIH/NHLBI)

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Experimental Data Snapshot

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

Literature

Activation of the angiotensin II type I receptor by a non-peptide agonist

Skiba, M.A., Liu, J., Shen, P., Kim, J., Wren, E., Gilman, M.S.A., Staus, D., McMahon, C., Smith, J.S., Lefkowitz, R.J., Kahne, D., Wingler, L.M., Kruse, A.C.

To be published.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 3-mer - A1B1C1 Pseudo Symmetry: Asymmetric - C1 
Pseudo Stoichiometry: Hetero 3-mer - A2B1 

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: gel filtration

Macromolecule Content 

• Total Structure Weight: 114.87 kDa 
• Atom Count: 5,778 
• Modeled Residue Count: 721 
• Deposited Residue Count: 1,028 
• Unique protein chains: 3

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Nanobody AT118-R,Type-1 angiotensin II receptor with Soluble cytochrome b562 insertion	A	582	synthetic construct, Homo sapiens, Escherichia coli	Mutation(s): 2
UniProt & NIH Common Fund Data Resources
Find proteins for P30556 (Homo sapiens) Explore P30556  Go to UniProtKB:  P30556
GTEx:  ENSG00000144891
Find proteins for P0ABE7 (Escherichia coli) Explore P0ABE7  Go to UniProtKB:  P0ABE7
UniProt Groups	P0ABE7P30556

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
BAG2 Anti-BRIL Fab Heavy Chain	B [auth C]	231	synthetic construct	Mutation(s): 0

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
BAG2 Anti-BRIL Fab Light Chain	C [auth D]	215	synthetic construct	Mutation(s): 0

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
Y01	D [auth A], E [auth A]	CHOLESTEROL HEMISUCCINATE C31 H50 O4 WLNARFZDISHUGS-MIXBDBMTSA-N
LSN (Subject of Investigation/LOI)	F [auth A]	[2-butyl-5-chloranyl-3-[[4-[2-(2H-1,2,3,4-tetrazol-5-yl)phenyl]phenyl]methyl]imidazol-4-yl]methanol C22 H23 Cl N6 O PSIFNNKUMBGKDQ-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

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

EM Software:

Task	Software Package	Version
MODEL REFINEMENT	PHENIX	1.21.1_5286
RECONSTRUCTION	cryoSPARC	3

Structure Validation

Entry History 

& Funding Information

Deposition Data

• Released Date: 2026-07-29 
Deposition Author(s): Skiba, M.A., Gilman, M.S.A., Kruse, A.C.

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Funding Organization	Location	Grant Number
National Institutes of Health/Eunice Kennedy Shriver National Institute of Child Health & Human Development (NIH/NICHD)	United States	K99HD110612
National Institutes of Health/National Cancer Institute (NIH/NCI)	United States	R01CA260415
National Institutes of Health/Eunice Kennedy Shriver National Institute of Child Health & Human Development (NIH/NICHD)	United States	R21HD101596
National Institutes of Health/National Heart, Lung, and Blood Institute (NIH/NHLBI)	United States	R01HL176532

Revision History  

• Version 1.0: 2026-07-29
  Type: Initial release