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Gene. 1996 May 24;171(1):99-102.

Cloning and sequencing of a gene encoding a new member of the tetratricopeptide protein family from magnetosomes of Magnetospirillum magnetotacticum.

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Department of Life Science, Faculty of Bioscience and Biotechnology, Tokyo Institute of Technology, Yokohama, Japan.


A gene encoding the 22 kDa protein (MAM22) which was localized in the magnetosomes isolated from the magnetotactic bacterium, Magnetospirillum magnetotacticum, was cloned and sequenced. MAM22 was composed of 220 amino acids (aa) with a molecular weight of 24,186 Da. The deduced aa sequence exhibited significant homology with a number of proteins that belong to the tetratricopeptide repeat (TPR) protein family, including mitochondrial protein import receptors and peroxisomal protein import receptors. The presence of three repeats of a degenerate 34-aa consensus sequence, suggest that MAM22 localized in magnetosome membranes may interact with the cytoplasmic proteins containing similar TPR motifs.

[Indexed for MEDLINE]

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