9DBQ

Cryo-EM structure of human ABCB6 transporter in an inward-facing conformation


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.90 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

The role of ATP-binding Cassette subfamily B member 6 in the inner ear.

Baril, S.A.Wilson, K.A.Shaik, M.M.Fukuda, Y.Umans, R.A.Barbieri, A.Lynch, J.Gose, T.Myasnikov, A.Oldham, M.L.Wang, Y.Zhu, J.Fang, J.Zuo, J.Kalathur, R.C.Ford, R.C.Coffin, A.Taylor, M.R.O'Mara, M.L.Schuetz, J.D.

(2024) Nat Commun 15: 9885-9885

  • DOI: https://doi.org/10.1038/s41467-024-53663-x
  • Primary Citation of Related Structures:  
    9DBQ

  • PubMed Abstract: 

    ABCB6 has been implicated in dyschromatosis universalis hereditaria, a condition characterized by hyperpigmented and hypopigmented skin macules. Dyschromatosis universalis hereditaria can also present with hearing loss. Dyschromatosis universalis hereditaria-associated mutations in ABCB6 have been reported, but the role of this protein in the inner ear has not been studied. Here we determine a high-resolution (2.93 Å) cryo-EM structure of ABCB6 and functionally characterized several dyschromatosis universalis hereditaria mutants. We find that the L356P mutant abolishes ABCB6 function, and affirm the underlying loss of ATP binding mechanism using molecular dynamics simulations based on our cryo-EM structure. To test the role of ABCB6 in the inner ear, we characterize Abcb6 (the ABCB6 homolog) in zebrafish. We show that Abcb6 suppression by morpholinos reduces inner ear and lateral line hair cell numbers. Morphants also lack the utricular otolith, which is associated with vestibular function. Co-injecting morpholinos with human ABCB6 mRNA partially rescues the morphant phenotype, suggesting that Abcb6 plays a developmental role in inner ear structures. Further, we show that Abcb6 knockout mice exhibit an increased auditory brainstem response threshold, resulting in reduced hearing sensitivity. Taken together, these data suggest ABCB6 plays a role in inner ear development and function.


  • Organizational Affiliation

    Department of Pharmaceutical Sciences, St. Jude Children's Research Hospital, Memphis, TN, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
ATP-binding cassette sub-family B member 6
A, B
850Homo sapiensMutation(s): 0 
Gene Names: ABCB6MTABC3PRPUMAT
EC: 7.6.2.5
Membrane Entity: Yes 
UniProt & NIH Common Fund Data Resources
Find proteins for Q9NP58 (Homo sapiens)
Explore Q9NP58 
Go to UniProtKB:  Q9NP58
PHAROS:  Q9NP58
GTEx:  ENSG00000115657 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9NP58
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Y01
Query on Y01

Download Ideal Coordinates CCD File 
C [auth A]
D [auth A]
E [auth A]
F [auth A]
G [auth A]
C [auth A],
D [auth A],
E [auth A],
F [auth A],
G [auth A],
H [auth A],
I [auth A],
J [auth A],
K [auth A],
L [auth A],
M [auth B],
N [auth B],
O [auth B],
P [auth B],
Q [auth B],
R [auth B],
S [auth B],
T [auth B],
U [auth B],
V [auth B]
CHOLESTEROL HEMISUCCINATE
C31 H50 O4
WLNARFZDISHUGS-MIXBDBMTSA-N
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.90 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion
RECONSTRUCTIONcryoSPARC
MODEL REFINEMENTPHENIX

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Not funded--

Revision History  (Full details and data files)

  • Version 1.0: 2024-11-20
    Type: Initial release
  • Version 1.1: 2024-12-04
    Changes: Data collection, Database references