5OQT

Crystal structure of a bacterial cationic amino acid transporter (CAT) homologue


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.86 Å
  • R-Value Free: 0.271 
  • R-Value Work: 0.215 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Structural basis for amino acid transport by the CAT family of SLC7 transporters.

Jungnickel, K.E.J.Parker, J.L.Newstead, S.

(2018) Nat Commun 9: 550-550

  • DOI: 10.1038/s41467-018-03066-6
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Amino acids play essential roles in cell biology as regulators of metabolic pathways. Arginine in particular is a major signalling molecule inside the cell, being a precursor for both l-ornithine and nitric oxide (NO) synthesis and a key regulator of ...

    Amino acids play essential roles in cell biology as regulators of metabolic pathways. Arginine in particular is a major signalling molecule inside the cell, being a precursor for both l-ornithine and nitric oxide (NO) synthesis and a key regulator of the mTORC1 pathway. In mammals, cellular arginine availability is determined by members of the solute carrier (SLC) 7 family of cationic amino acid transporters. Whereas CAT-1 functions to supply cationic amino acids for cellular metabolism, CAT-2A and -2B are required for macrophage activation and play important roles in regulating inflammation. Here, we present the crystal structure of a close homologue of the mammalian CAT transporters that reveals how these proteins specifically recognise arginine. Our structural and functional data provide a model for cationic amino acid transport in mammalian cells and reveals mechanistic insights into proton-coupled, sodium-independent amino acid transport in the wider APC superfamily.


    Organizational Affiliation

    Department of Biochemistry, University of Oxford, South Parks Road, Oxford, OX1 3QU, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Amino acid transporter
A
471Geobacillus kaustophilus (strain HTA426)Mutation(s): 0 
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
Solute Carrier (SLC) Transporter Superfamily
Protein: 
SLC7 CAT family amino acid transporter, wild-type complexed with L-Ala
Find proteins for Q5L1G5 (Geobacillus kaustophilus (strain HTA426))
Go to UniProtKB:  Q5L1G5
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Uncharacterized protein YneM
C
31Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: mgtS (yneM)
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
Solute Carrier (SLC) Transporter Superfamily
Protein: 
SLC7 CAT family amino acid transporter, wild-type complexed with L-Ala
Find proteins for A5A616 (Escherichia coli (strain K12))
Go to UniProtKB:  A5A616
Small Molecules
Ligands 5 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
OLC
Query on OLC

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Download CCD File 
A, C
(2R)-2,3-dihydroxypropyl (9Z)-octadec-9-enoate
1-Oleoyl-R-glycerol
C21 H40 O4
RZRNAYUHWVFMIP-GDCKJWNLSA-N
 Ligand Interaction
ACT
Query on ACT

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Download CCD File 
A
ACETATE ION
C2 H3 O2
QTBSBXVTEAMEQO-UHFFFAOYSA-M
 Ligand Interaction
CL
Query on CL

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Download CCD File 
A
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
ALA
Query on ALA

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Download CCD File 
A
ALANINE
C3 H7 N O2
QNAYBMKLOCPYGJ-REOHCLBHSA-N
 Ligand Interaction
CLR
Query on CLR

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Download CCD File 
C
CHOLESTEROL
C27 H46 O
HVYWMOMLDIMFJA-DPAQBDIFSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.86 Å
  • R-Value Free: 0.271 
  • R-Value Work: 0.215 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 76.923α = 90.00
b = 83.148β = 90.00
c = 119.744γ = 90.00
Software Package:
Software NamePurpose
DIALSdata reduction
BUSTERrefinement
PHASERphasing
Aimlessdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Wellcome TrustUnited Kingdom102890/Z/13/Z
European CommissionUnited KingdomNanoMem

Revision History 

  • Version 1.0: 2018-02-14
    Type: Initial release
  • Version 1.1: 2018-02-21
    Type: Database references
  • Version 1.2: 2018-02-28
    Type: Derived calculations
  • Version 1.3: 2018-04-25
    Type: Data collection