8ZBR | pdb_00008zbr

Cryo-EM structure of nanodisc-reconstituted wildtype human MRP4 (apo-form)

• PDB DOI: https://doi.org/10.2210/pdb8ZBR/pdb
• EM Map EMD-39908: EMDB EMDataResource

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


• Deposited: 2024-04-27 Released: 2025-04-09 
• Deposition Author(s): Xie, Z., Long, F.
• Funding Organization(s): Ministry of Science and Technology (MoST, China)

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 2.92 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Starting Model: in silico

Literature

Structural insights into the human MRP4 mediating multiple drug resistance (MDR) to vincristine and 5-FU and reversal of MDR by lapatinib

Xie, Z., Long, F.

To be published.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

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

Biological Assembly Evidence: electron microscopy

Macromolecule Content 

• Total Structure Weight: 155.31 kDa 
• Atom Count: 9,403 
• Modeled Residue Count: 1,149 
• Deposited Residue Count: 1,344 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
ATP-binding cassette sub-family C member 4	A	1,344	Homo sapiens	Mutation(s): 0  Gene Names: ABCC4, MOATB, MRP4 EC: 7.6.2 (PDB Primary Data), 7.6.2.2 (PDB Primary Data), 7.6.2.3 (PDB Primary Data) Membrane Entity: Yes
UniProt & NIH Common Fund Data Resources
Find proteins for O15439 (Homo sapiens) Explore O15439  Go to UniProtKB:  O15439
PHAROS:  O15439 GTEx:  ENSG00000125257

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
Y01 (Subject of Investigation/LOI)	C [auth A], D [auth A], E [auth A], G [auth A]	CHOLESTEROL HEMISUCCINATE C31 H50 O4 WLNARFZDISHUGS-MIXBDBMTSA-N
CLR (Subject of Investigation/LOI)	B [auth A], F [auth A], H [auth A]	CHOLESTEROL C27 H46 O HVYWMOMLDIMFJA-DPAQBDIFSA-N

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 2.92 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

EM Software:

Task	Software Package	Version
MODEL REFINEMENT	PHENIX	1.20.1-4487

Structure Validation

Entry History 

& Funding Information

Deposition Data

• Released Date: 2025-04-09 
Deposition Author(s): Xie, Z., Long, F.

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Funding Organization	Location	Grant Number
Ministry of Science and Technology (MoST, China)	China	2021YFA0909500

Revision History  

• Version 1.0: 2025-04-09
  Type: Initial release