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Hiding in plain sight: the F segment and other conserved features of seed plant SKn dehydrins.

ABSTRACT: An 11-residue amino acid sequence, DRGLFDFLGKK, is highly conserved in a subset of dehydrins found across the full spectrum of seed plants and here given the name F-segment. An 11-residue amino acid sequence, DRGLFDFLGKK, is highly conserved in identity and polarity in 130 non-redundant dehydrin sequences representing conifers and all major angiosperm groups. This newly described motif is here given the name F segment based on the pair of hydrophobic F residues at the core of the sequence. The majority of dehydrins previously classified as SKn dehydrins contain one F segment N terminal to the S and K segments and can accordingly be reclassified as FSKn dehydrins. A cysteine-containing variant, GCGMFDFLKK, occurs in a few rosid and asterid taxa. The S segment in this and other dehydrin types also includes previously overlooked conserved features, including a KLHR prefix and charged or G residues within and following the characteristic string of S residues. Secondary structure prediction models indicate that the F segment and S segment prefix may form amphipathic helices that could be involved in membrane or protein binding.

SUBMITTER: Richard Strimbeck G

PROVIDER: S-EPMC5393156 | biostudies-literature | 2017 May

REPOSITORIES: biostudies-literature

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Hiding in plain sight: the F segment and other conserved features of seed plant SK<sub>n</sub> dehydrins.

Richard Strimbeck G G

Planta 20170320 5

<h4>Main conclusion</h4>An 11-residue amino acid sequence, DRGLFDFLGKK, is highly conserved in a subset of dehydrins found across the full spectrum of seed plants and here given the name F-segment. An 11-residue amino acid sequence, DRGLFDFLGKK, is highly conserved in identity and polarity in 130 non-redundant dehydrin sequences representing conifers and all major angiosperm groups. This newly described motif is here given the name F segment based on the pair of hydrophobic F residues at the cor ...[more]

PMID: 28321577

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Dataset Information

Hiding in plain sight: the F segment and other conserved features of seed plant SKn dehydrins.

Publications

Hiding in plain sight: the F segment and other conserved features of seed plant SK<sub>n</sub> dehydrins.

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