4XI0

MamA 41-end from Desulfovibrio magneticus RS-1

Summary for 4XI0

• Entry DOI: 10.2210/pdb4xi0/pdb
• Descriptor: Magnetosome protein MamA (1 entity in total)
• Functional Keywords: magnetosome associated protein, protein-protein interaction, tpr motif, protein binding
• Biological source: Desulfovibrio magneticus RS-1
• Total number of polymer chains: 6
• Total formula weight: 139671.47

Authors

Zarivach, R.,Zeytuni, N.,Cronin, S.,Davidov, G.,Baran, D.,Stein, T. (deposition date: 2015-01-06, release date: 2015-08-19, Last modification date: 2024-01-10)

Primary citation

Zeytuni, N.,Cronin, S.,Lefevre, C.T.,Arnoux, P.,Baran, D.,Shtein, Z.,Davidov, G.,Zarivach, R.
MamA as a Model Protein for Structure-Based Insight into the Evolutionary Origins of Magnetotactic Bacteria.
Plos One, 10:e0130394-e0130394, 2015

PubMed Abstract: MamA is a highly conserved protein found in magnetotactic bacteria (MTB), a diverse group of prokaryotes capable of navigating according to magnetic fields - an ability known as magnetotaxis. Questions surround the acquisition of this magnetic navigation ability; namely, whether it arose through horizontal or vertical gene transfer. Though its exact function is unknown, MamA surrounds the magnetosome, the magnetic organelle embedding a biomineralised nanoparticle and responsible for magnetotaxis. Several structures for MamA from a variety of species have been determined and show a high degree of structural similarity. By determining the structure of MamA from Desulfovibrio magneticus RS-1 using X-ray crystallography, we have opened up the structure-sequence landscape. As such, this allows us to perform structural- and phylogenetic-based analyses using a variety of previously determined MamA from a diverse range of MTB species across various phylogenetic groups. We found that MamA has remained remarkably constant throughout evolution with minimal change between different taxa despite sequence variations. These findings, coupled with the generation of phylogenetic trees using both amino acid sequences and 16S rRNA, indicate that magnetotaxis likely did not spread via horizontal gene transfer and instead has a significantly earlier, primordial origin.

PubMed: 26114501
DOI: 10.1371/journal.pone.0130394

Experimental method

X-RAY DIFFRACTION (2.88 Å)