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Isolation of salt-induced periplasmic proteins from Synechocystis sp. strain PCC 6803

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Periplasmic proteins were obtained from control cells and salt-adapted cells of the cyanobacterium Synechocystis sp. PCC 6803 using the method of cold osmotic shock. Two of these proteins (PP 1, apparent mol. mass 27.6 kDa, and PP 3, apparent mol. mass 39.9 kDa) were accumulated in high amounts in the periplasm of salt-adapted cells, while the major periplasmic protein (PP 2, apparent mol. mass 36.0 kDa) was accumulated independently from salt. After isolation from gels and partial sequencing, the proteins could be assigned to proteins deduced from the complete genome sequence of Synechocystis. Neither salt-induced periplasmic proteins (PP 1, Slr0924 and PP 3, Slr1485) exhibited sequence similarity to proteins of known function from databases. The major protein (PP 2-Slr0513) showed significant sequence similarities to iron-binding proteins. All proteins included typical leader sequences at their N-terminus.

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Received: 21 September 1998 / Accepted: 17 December 1998

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Fulda, S., Mikkat, S., Schröder, W. et al. Isolation of salt-induced periplasmic proteins from Synechocystis sp. strain PCC 6803. Arch Microbiol 171, 214–217 (1999). https://doi.org/10.1007/s002030050702

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  • DOI: https://doi.org/10.1007/s002030050702

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