6T84 image
Entry Detail
PDB ID:
6T84
Keywords:
LIPID TRANSPORT
Title:
crystal structure of the mycobacterial trehalose monomycolate transport factor A, TtfA
Biological Source:
Source Organism:
Mycolicibacterium smegmatis MC2 155
Host Organism:
Escherichia coli BL21
PDB Version:
Deposition Date:
2019-10-24
Release Date:
2019-12-25
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
1.40 Å
R-Value Free:
0.19
R-Value Work:
0.17
R-Value Observed:
0.17
Space Group:
I 2 2 2
6T84 validation report
Macromolecular Entities
Protein Blast
Polymer Type:polypeptide(L)
Description:Uncharacterized protein
Chain IDs:A
Chain Length:187
Number of Molecules:1
Biological Source:Mycolicibacterium smegmatis MC2 155
UniProt ID:A0QQF4
Ligand Molecules
SO4
Primary Citation
The crystal structure of the mycobacterial trehalose monomycolate transport factor A, TtfA, reveals an atypical fold.
Proteins 88 809 815 (2020)
PMID: 31833106 DOI: 10.1002/prot.25863

Abstact

Trehalose monomycolate (TMM) represents an essential element of the mycobacterial envelope. While synthesized in the cytoplasm, TMM is transported across the inner membrane by MmpL3 but, little is known regarding the MmpL3 partners involved in this process. Recently, the TMM transport factor A (TtfA) was found to form a complex with MmpL3 and to participate in TMM transport, although its biological role remains to be established. Herein, we report the crystal structure of the Mycobacterium smegmatis TtfA core domain. The phylogenetic distribution of TtfA homologues in non-mycolate containing bacteria suggests that TtfA may exert additional functions.

Legend

Protein

Chemical

Disease

Primary Citation of related structures
6T84