5VJ4 | pdb_00005vj4

Crystal structure of a putative surface protein encoded by BTA121

PDB DOI: https://doi.org/10.2210/pdb5VJ4/pdb

Classification: LIPID BINDING PROTEIN
Organism(s): Borrelia turicatae 91E135
Expression System: Escherichia coli
Mutation(s): No

Deposited: 2017-04-18 Released: 2017-11-29
Deposition Author(s): Luo, Z., Asojo, O.

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 2.80 Å
R-Value Free:
0.224 (Depositor), 0.224 (DCC)
R-Value Work:
0.196 (Depositor), 0.196 (DCC)
R-Value Observed:
0.197 (Depositor)

wwPDB Validation 3D Report Full Report

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

Literature

Crystal Structure of Borrelia turicatae protein, BTA121, a differentially regulated gene in the tick-mammalian transmission cycle of relapsing fever spirochetes.

Luo, Z., Kelleher, A.J., Darwiche, R., Hudspeth, E.M., Shittu, O.K., Krishnavajhala, A., Schneiter, R., Lopez, J.E., Asojo, O.A.

(2017) Sci Rep 7: 15310-15310

PubMed: 29127407 Search on PubMed Search on PubMed Central
DOI: https://doi.org/10.1038/s41598-017-14959-9
Primary Citation Related Structures:
5VJ4

PubMed Abstract:
Tick-borne relapsing fever (RF) borreliosis is a neglected disease that is often misdiagnosed. RF species circulating in the United States include Borrelia turicatae, which is transmitted by argasid ticks. Environmental adaptation by RF Borrelia is poorly understood, however our previous studies indicated differential regulation of B. turicatae genes localized on the 150 kb linear megaplasmid during the tick-mammalian transmission cycle, including bta121. This gene is up-regulated by B. turicatae in the tick versus the mammal, and the encoded protein (BTA121) is predicted to be surface localized. The structure of BTA121 was solved by single-wavelength anomalous dispersion (SAD) using selenomethionine-derivative protein. The topology of BTA121 is unique with four helical domains organized into two helical bundles. Due to the sequence similarity of several genes on the megaplasmid, BTA121 can serve as a model for their tertiary structures. BTA121 has large interconnected tunnels and cavities that can accommodate ligands, notably long parallel helices, which have a large hydrophobic central pocket. Preliminary in-vitro studies suggest that BTA121 binds lipids, notably palmitate with a similar order of binding affinity as tablysin-15, a known palmitate-binding protein. The reported data will guide mechanistic studies to determine the role of BTA121 in the tick-mammalian transmission cycle of B. turicatae.

Organizational Affiliation

Synchrotron Radiation Research Section, Macromolecular Crystallography Laboratory, National Cancer Institute, Argonne, Illinois, 60439, USA.

Macromolecule Content

Total Structure Weight: 82.64 kDa
Atom Count: 4,396
Modeled Residue Count: 548
Deposited Residue Count: 750
Unique protein chains: 1

Macromolecules

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| 3D Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Uncharacterized protein	A, B	375	Borrelia turicatae 91E135	Mutation(s): 0 Gene Names: BTA121
UniProt
Find proteins for A0A0R9P931 (Borrelia turicatae (strain 91E135)) Explore A0A0R9P931 Go to UniProtKB: A0A0R9P931
Entity Groups
Sequence Clusters	30% Identity 50% Identity 70% Identity 90% Identity 95% Identity 100% Identity
UniProt Group	A0A0R9P931
Sequence Annotations Expand
Reference Sequence

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
SO4 Query on SO4 Download:Ideal Coordinates CCD File SDF format, chain O [auth B] SDF format, chain N [auth B] SDF format, chain M [auth B] SDF format, chain L [auth B] SDF format, chain K [auth B] SDF format, chain J [auth B] SDF format, chain I [auth B] SDF format, chain H [auth A] SDF format, chain G [auth A] SDF format, chain F [auth A] SDF format, chain E [auth A] SDF format, chain D [auth A] SDF format, chain C [auth A] MOL2 format, chain O [auth B] MOL2 format, chain N [auth B] MOL2 format, chain M [auth B] MOL2 format, chain L [auth B] MOL2 format, chain K [auth B] MOL2 format, chain J [auth B] MOL2 format, chain I [auth B] MOL2 format, chain H [auth A] MOL2 format, chain G [auth A] MOL2 format, chain F [auth A] MOL2 format, chain E [auth A] MOL2 format, chain D [auth A] MOL2 format, chain C [auth A] mmCIF format, chain O [auth B] mmCIF format, chain N [auth B] mmCIF format, chain M [auth B] mmCIF format, chain L [auth B] mmCIF format, chain K [auth B] mmCIF format, chain J [auth B] mmCIF format, chain I [auth B] mmCIF format, chain H [auth A] mmCIF format, chain G [auth A] mmCIF format, chain F [auth A] mmCIF format, chain E [auth A] mmCIF format, chain D [auth A] mmCIF format, chain C [auth A]	C [auth A] D [auth A] E [auth A] F [auth A] G [auth A] C [auth A], D [auth A], E [auth A], F [auth A], G [auth A], H [auth A], I [auth B], J [auth B], K [auth B], L [auth B], M [auth B], N [auth B], O [auth B]	SULFATE ION O₄ S QAOWNCQODCNURD-UHFFFAOYSA-L		Interactions Focus chain C [auth A] Focus chain D [auth A] Focus chain E [auth A] Focus chain F [auth A] Focus chain G [auth A] Focus chain H [auth A] Focus chain I [auth B] Focus chain J [auth B] Focus chain K [auth B] Focus chain L [auth B] Focus chain M [auth B] Focus chain N [auth B] Focus chain O [auth B] Interactions & Density Focus chain C [auth A] Focus chain D [auth A] Focus chain E [auth A] Focus chain F [auth A] Focus chain G [auth A] Focus chain H [auth A] Focus chain I [auth B] Focus chain J [auth B] Focus chain K [auth B] Focus chain L [auth B] Focus chain M [auth B] Focus chain N [auth B] Focus chain O [auth B]