4MFI | pdb_00004mfi

Crystal structure of Mycobacterium tuberculosis UgpB

PDB DOI: https://doi.org/10.2210/pdb4MFI/pdb

Classification: SUGAR BINDING PROTEIN
Organism(s): Mycobacterium tuberculosis H37Ra
Expression System: Escherichia coli
Mutation(s): No

Deposited: 2013-08-28 Released: 2014-07-23
Deposition Author(s): Jiang, D., Bartlam, M., Rao, Z.

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 1.50 Å
R-Value Free:
0.157 (Depositor), 0.154 (DCC)
R-Value Work:
0.135 (Depositor), 0.132 (DCC)
R-Value Observed:
0.136 (Depositor)

wwPDB Validation 3D Report Full Report

This is version 1.1 of the entry. See complete history.

Literature

Structural analysis of Mycobacterium tuberculosis ATP-binding cassette transporter subunit UgpB reveals specificity for glycerophosphocholine

Jiang, D., Zhang, Q., Zheng, Q., Zhou, H., Jin, J., Zhou, W., Bartlam, M., Rao, Z.

(2014) FEBS J 281: 331-341

PubMed: 24299297 Search on PubMed
DOI: https://doi.org/10.1111/febs.12600
Primary Citation Related Structures:
4MFI

PubMed Abstract:
Tuberculosis (TB), caused by Mycobacterium tuberculosis, is one of the most devastating human diseases, and is responsible for ~ 2 million deaths worldwide each year. The nutritional requirements for the growth of mycobacteria have been extensively studied since the discovery of M. tuberculosis, but the essential nutrients for M. tuberculosis inside the human host and the identity of the corresponding transporters remain unknown. The UgpABCE transporter of M. tuberculosis is one of five putative permeases for carbohydrate uptake, and is genetically predicted to be an sn-glycerol 3-phosphate importer. We have determined the 1.5-Å crystal structure of M. tuberculosis UgpB, which has been reported to be a promising vaccine candidate against TB. M. tuberculosis UgpB showed no detectable binding activity for sn-glycerol 3-phosphate by isothermal titration calorimetry, but instead showed a preference for glycerophosphocholine (GPC). M. tuberculosis UgpB largely resembles its Escherichia coli homolog, but with the critical Trp169 in the substrate-binding site of E. coli UgpB replaced by Leu205. Mutation of Leu205 abolishes GPC binding, suggesting that Leu205 is a determinant of GPC binding. The work reported here not only contributes to our understanding of the carbon and phosphate sources utilized by M. tuberculosis inside the human host, but will also promote improvements in TB chemotherapy. Structural data are available in the Protein Data Bank database under the accession number PDB 4MFI.

Organizational Affiliation

State Key Laboratory of Medicinal Chemical Biology, Tianjin, China; College of Life Sciences, Nankai University, Tianjin, China.

Macromolecule Content

Total Structure Weight: 46.77 kDa
Atom Count: 3,616
Modeled Residue Count: 403
Deposited Residue Count: 436
Unique protein chains: 1

Macromolecules

Find similar proteins by:

| 3D Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Sn-glycerol-3-phosphate ABC transporter substrate-binding protein UspB	A	436	Mycobacterium tuberculosis H37Ra	Mutation(s): 0 Gene Names: MRA_2856, ugpB
UniProt
Find proteins for A5U6I5 (Mycobacterium tuberculosis (strain ATCC 25177 / H37Ra)) Explore A5U6I5 Go to UniProtKB: A5U6I5
Entity Groups
Sequence Clusters	30% Identity 50% Identity 70% Identity 90% Identity 95% Identity 100% Identity
UniProt Group	A5U6I5
Sequence Annotations Expand
Reference Sequence