2KVC image
Deposition Date 2010-03-12
Release Date 2010-03-23
Last Version Date 2024-05-01
Entry Detail
PDB ID:
2KVC
Title:
Solution structure of the Mycobacterium tuberculosis protein Rv0543c, a member of the DUF3349 superfamily. Seattle Structural Genomics Center for Infectious Disease target MytuD.17112.a
Biological Source:
Source Organism:
Host Organism:
Method Details:
Experimental Method:
Conformers Calculated:
100
Conformers Submitted:
15
Selection Criteria:
target function
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:Putative uncharacterized protein
Gene (Uniprot):MRA_0550
Chain IDs:A
Chain Length:103
Number of Molecules:1
Biological Source:Mycobacterium tuberculosis
Ligand Molecules
Primary Citation
Inaugural structure from the DUF3349 superfamily of proteins, Mycobacterium tuberculosis Rv0543c.
Arch.Biochem.Biophys. 506 150 156 (2011)
PMID: 21144816 DOI: 10.1016/j.abb.2010.12.001

Abstact

The first structure for a member of the DUF3349 (PF11829) family of proteins, Rv0543c from Mycobacterium tuberculosis, has been determined using NMR-based methods and some of its biophysical properties characterized. Rv0543c is a 100 residue, 11.3 kDa protein that both size exclusion chromatography and NMR spectroscopy show to be a monomer in solution. The structure of the protein consists of a bundle of five α-helices, α1 (M1-Y16), α2 (P21-C33), α3 (S37-G52), α4 (G58-H65) and α5 (S72-G87), held together by a largely conserved group of hydrophobic amino acid side chains. Heteronuclear steady-state {¹H}-¹⁵N NOE, T₁, and T₂ values are similar through-out the sequence indicating that the backbones of the five helices are in a single motional regime. The thermal stability of Rv0543c, characterized by circular dichroism spectroscopy, indicates that Rv0543c irreversibly unfolds upon heating with an estimated melting temperature of 62.5 °C. While the biological function of Rv0543c is still unknown, the presence of DUF3349 proteins predominantly in Mycobacterium and Rhodococcus bacterial species suggests that Rv0543 may have a biological function unique to these bacteria, and consequently, may prove to be an attractive drug target to combat tuberculosis.

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Primary Citation of related structures