6F2G

Bacterial asc transporter crystal structure in open to in conformation


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.92 Å
  • R-Value Free: 0.261 
  • R-Value Work: 0.238 
  • R-Value Observed: 0.239 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

L amino acid transporter structure and molecular bases for the asymmetry of substrate interaction.

Errasti-Murugarren, E.Fort, J.Bartoccioni, P.Diaz, L.Pardon, E.Carpena, X.Espino-Guarch, M.Zorzano, A.Ziegler, C.Steyaert, J.Fernandez-Recio, J.Fita, I.Palacin, M.

(2019) Nat Commun 10: 1807-1807

  • DOI: 10.1038/s41467-019-09837-z
  • Primary Citation of Related Structures:  
    6F2W, 6F2G

  • PubMed Abstract: 
  • L-amino acid transporters (LATs) play key roles in human physiology and are implicated in several human pathologies. LATs are asymmetric amino acid exchangers where the low apparent affinity cytoplasmic side controls the exchange of substrates with h ...

    L-amino acid transporters (LATs) play key roles in human physiology and are implicated in several human pathologies. LATs are asymmetric amino acid exchangers where the low apparent affinity cytoplasmic side controls the exchange of substrates with high apparent affinity on the extracellular side. Here, we report the crystal structures of an LAT, the bacterial alanine-serine-cysteine exchanger (BasC), in a non-occluded inward-facing conformation in both apo and substrate-bound states. We crystallized BasC in complex with a nanobody, which blocks the transporter from the intracellular side, thus unveiling the sidedness of the substrate interaction of BasC. Two conserved residues in human LATs, Tyr 236 and Lys 154, are located in equivalent positions to the Na1 and Na2 sites of sodium-dependent APC superfamily transporters. Functional studies and molecular dynamics (MD) calculations reveal that these residues are key for the asymmetric substrate interaction of BasC and in the homologous human transporter Asc-1.


    Organizational Affiliation

    Department of Biochemistry and Molecular Biomedicine, Faculty of Biology, University of Barcelona, 08028, Barcelona, Spain. manuel.palacin@irbbarcelona.org.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Putative amino acid/polyamine transport proteinA444Carnobacterium sp. AT7Mutation(s): 0 
Gene Names: CAT7_03719
Membrane protein
Mpstruc
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
Amino Acid/Polyamine/Organocation (APC) Superfamily
Protein: 
BasC alanine-serine-cysteine exchanger, open-inward conformation
Find proteins for A8UCQ5 (Carnobacterium sp. AT7)
Explore A8UCQ5 
Go to UniProtKB:  A8UCQ5
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Nanobody 74B134Lama glamaMutation(s): 0 
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download CCD File 
B
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.92 Å
  • R-Value Free: 0.261 
  • R-Value Work: 0.238 
  • R-Value Observed: 0.239 
  • Space Group: P 41 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 85.83α = 90
b = 85.83β = 90
c = 321.69γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
STARANISOdata scaling
AutoPROCdata scaling
PHASERphasing
XDSdata reduction
pointlessdata scaling
Aimlessdata scaling

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Spain--

Revision History 

  • Version 1.0: 2019-04-24
    Type: Initial release
  • Version 1.1: 2019-05-01
    Changes: Data collection, Database references