Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

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

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

Macromolecule Content

• Total Structure Weight: 54842.37 
• Atom Count: 3571 
• Residue Count: 501 
• Unique protein chains: 1

2JLN

Structure of Mhp1, a nucleobase-cation-symport-1 family transporter

• DOI: 10.2210/pdb2JLN/pdb

• Classification: MEMBRANE PROTEIN
• Organism(s): Microbacterium liquefaciens
• Expression System: Escherichia coli


• Deposited: 2008-09-11 Released: 2008-10-28 
• Deposition Author(s): Weyand, S., Shimamura, T., Yajima, S., Suzuki, S., Mirza, O., Krusong, K., Carpenter, E.P., Rutherford, N.G., Hadden, J.M., O'Reilly, J., Ma, P., Saidijam, M., Patching, S.G., Hope, R.J., Norbertczak, H.T., Roach, P.C.J., Iwata, S., Henderson, P.J.F., Cameron, A.D.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.85 Å
• R-Value Free: 0.281 
• R-Value Work: 0.234 

Literature

Structure and Molecular Mechanism of a Nucleobase-Cation-Symport-1 Family Transporter.

Weyand, S., Shimamura, T., Yajima, S., Suzuki, S., Mirza, O., Krusong, K., Carpenter, E.P., Rutherford, N.G., Hadden, J.M., O'Reilly, J., Ma, P., Saidijam, M., Patching, S.G., Hope, R.J., Norbertczak, H.T., Roach, P.C.J., Iwata, S., Henderson, P.J.F., Cameron, A.D.

(2008) Science 322: 709

• PubMed: 18927357 
• DOI: 10.1126/science.1164440
• Primary Citation of Related Structures:  
  2JLO


• PubMed Abstract: 
  

The nucleobase-cation-symport-1 (NCS1) transporters are essential components of salvage pathways for nucleobases and related metabolites. Here, we report the 2.85-angstrom resolution structure of the NCS1 benzyl-hydantoin transporter, Mhp1, from Microbacterium liquefaciens. Mhp1 contains 12 transmembrane helices, 10 of which are arranged in two inverted repeats of five helices. The structures of the outward-facing open and substrate-bound occluded conformations were solved, showing how the outward-facing cavity closes upon binding of substrate. Comparisons with the leucine transporter LeuT(Aa) and the galactose transporter vSGLT reveal that the outward- and inward-facing cavities are symmetrically arranged on opposite sides of the membrane. The reciprocal opening and closing of these cavities is synchronized by the inverted repeat helices 3 and 8, providing the structural basis of the alternating access model for membrane transport.

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Organizational Affiliation: 

Membrane Protein Laboratory, Diamond Light Source Limited, Harwell Science and Innovation Campus, Chilton, Didcot, Oxfordshire OX11 0DE, UK.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
MHP1	A	501	Microbacterium liquefaciens	Mutation(s): 0  Gene Names: hyuP
Membrane protein mpstruc	Group:  TRANSMEMBRANE PROTEINS: ALPHA-HELICAL		Sub Group:  Nucleobase-Cation-Symport-1 (NCS1) Family	Protein:  Mhp1 Benzyl-hydantoin transporter (without substrate); outward-facing conformation
Find proteins for D6R8X8 (Microbacterium liquefaciens) Go to UniProtKB:  D6R8X8

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
NA	A	SODIUM ION Na FKNQFGJONOIPTF-UHFFFAOYSA-N
HG	A	MERCURY (II) ION Hg BQPIGGFYSBELGY-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.85 Å
• R-Value Free: 0.281 
• R-Value Work: 0.234 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length (Å)	Angle (°)
a = 79.700	α = 90.00
b = 109.140	β = 90.00
c = 113.820	γ = 90.00

Software Package:

Software Name	Purpose
DENZO	data reduction
SHARP	phasing
SCALEPACK	data scaling
PHENIX	refinement

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2008-09-11 
• Released Date: 2008-10-28 
• Deposition Author(s): Weyand, S., Shimamura, T., Yajima, S., Suzuki, S., Mirza, O., Krusong, K., Carpenter, E.P., Rutherford, N.G., Hadden, J.M., O'Reilly, J., Ma, P., Saidijam, M., Patching, S.G., Hope, R.J., Norbertczak, H.T., Roach, P.C.J., Iwata, S., Henderson, P.J.F., Cameron, A.D.

Revision History 

• Version 1.0: 2008-10-28
  Type: Initial release
• Version 1.1: 2011-05-07
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance