4C00

Crystal structure of TamA from E. coli

• PDB DOI: https://doi.org/10.2210/pdb4C00/pdb

• Classification: TRANSPORT PROTEIN
• Organism(s): Escherichia coli
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 
• Membrane Protein: Yes  OPMPDBTMMemProtMDmpstruc


• Deposited: 2013-07-30 Released: 2013-09-25 
• Deposition Author(s): Gruss, F., Zaehringer, F., Jakob, R.P., Burmann, B.M., Hiller, S., Maier, T.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.25 Å
• R-Value Free: 0.217 
• R-Value Work: 0.190 
• R-Value Observed: 0.191 

Starting Models: experimental

Literature

The Structural Basis of Autotransporter Translocation by Tama

Gruss, F., Zaehringer, F., Jakob, R.P., Burmann, B.M., Hiller, S., Maier, T.

(2013) Nat Struct Mol Biol 20: 1318

• PubMed: 24056943 
• DOI: https://doi.org/10.1038/nsmb.2689
• Primary Citation of Related Structures:  
  4BZA, 4C00


• PubMed Abstract: 
  

  TamA is an Escherichia coli Omp85 protein involved in autotransporter biogenesis. It comprises a 16-stranded transmembrane β-barrel and three POTRA domains. The 2.3-Å crystal structure reveals that the TamA barrel is closed at the extracellular face by a conserved lid loop. The C-terminal β-strand of the barrel forms an unusual inward kink, which weakens the lateral barrel wall and creates a gate for substrate access to the lipid bilayer.

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Organizational Affiliation: 

Biozentrum, University of Basel, Basel, Switzerland.

Biological Assembly 1  

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

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

Macromolecule Content

• Total Structure Weight: 73.97 kDa 
• Atom Count: 5,043 
• Modelled Residue Count: 544 
• Deposited Residue Count: 559 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
TRANSLOCATION AND ASSEMBLY MODULE TAMA	A	559	Escherichia coli	Mutation(s): 0  Membrane Entity: Yes
UniProt
Find proteins for P0ADE4 (Escherichia coli (strain K12)) Explore P0ADE4  Go to UniProtKB:  P0ADE4

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
MC3	B [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 A], N [auth A], O [auth A], P [auth A], Q [auth A]	1,2-DIMYRISTOYL-RAC-GLYCERO-3-PHOSPHOCHOLINE C36 H72 N O8 P CITHEXJVPOWHKC-UUWRZZSWSA-N
ACT	R [auth A], S [auth A]	ACETATE ION C2 H3 O2 QTBSBXVTEAMEQO-UHFFFAOYSA-M
CL	T [auth A], U [auth A], V [auth A]	CHLORIDE ION Cl VEXZGXHMUGYJMC-UHFFFAOYSA-M

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.25 Å
• R-Value Free: 0.217 
• R-Value Work: 0.190 
• R-Value Observed: 0.191 
• Space Group: P 2₁ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 77.47	α = 90
b = 261.06	β = 90
c = 57.84	γ = 90

Software Package:

Software Name	Purpose
PHENIX	refinement
XDS	data reduction
XDS	data scaling
PHASER	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2013-09-25 
Deposition Author(s): Gruss, F., Zaehringer, F., Jakob, R.P., Burmann, B.M., Hiller, S., Maier, T.

Revision History  

• Version 1.0: 2013-09-25
  Type: Initial release
  
• Version 1.1: 2013-10-02
  Changes: Database references
• Version 1.2: 2013-11-20
  Changes: Database references
• Version 1.3: 2023-12-20
  Changes: Data collection, Database references, Derived calculations, Other, Refinement description